Release v5.3.31

Includes RxJava 3.1.8, SmallRye Mutiny 1.9.0, BlockHound 1.0.8, OpenPDF 1.3.33, Checkstyle 10.12.5

Closes gh-31584

.gitignore

@@ -46,4 +46,6 @@ atlassian-ide-plugin.xml
 .gradletasknamecache
 
 # VS Code
-.vscode/
+.vscode/
+
+cached-antora-playbook.yml

.sdkmanrc

@@ -1,3 +1,3 @@
 # Enable auto-env through the sdkman_auto_env config
 # Add key=value pairs of SDKs to use below
-java=8.0.362-librca
+java=8.0.382-librca

build.gradle

@@ -28,18 +28,18 @@ configure(allprojects) { project ->
 	dependencyManagement {
 		imports {
 			mavenBom "com.fasterxml.jackson:jackson-bom:2.12.7"
-			mavenBom "io.netty:netty-bom:4.1.90.Final"
-			mavenBom "io.projectreactor:reactor-bom:2020.0.30"
+			mavenBom "io.netty:netty-bom:4.1.101.Final"
+			mavenBom "io.projectreactor:reactor-bom:2020.0.38"
 			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR13"
 			mavenBom "io.rsocket:rsocket-bom:1.1.3"
-			mavenBom "org.eclipse.jetty:jetty-bom:9.4.51.v20230217"
+			mavenBom "org.eclipse.jetty:jetty-bom:9.4.53.v20231009"
 			mavenBom "org.jetbrains.kotlin:kotlin-bom:1.5.32"
 			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.5.2"
 			mavenBom "org.jetbrains.kotlinx:kotlinx-serialization-bom:1.2.2"
 			mavenBom "org.junit:junit-bom:5.8.2"
 		}
 		dependencies {
-			dependencySet(group: 'org.apache.logging.log4j', version: '2.20.0') {
+			dependencySet(group: 'org.apache.logging.log4j', version: '2.21.1') {
 				entry 'log4j-api'
 				entry 'log4j-core'
 				entry 'log4j-jul'
@@ -67,9 +67,9 @@ configure(allprojects) { project ->
 			dependency "io.reactivex:rxjava:1.3.8"
 			dependency "io.reactivex:rxjava-reactive-streams:1.2.1"
 			dependency "io.reactivex.rxjava2:rxjava:2.2.21"
-			dependency "io.reactivex.rxjava3:rxjava:3.1.5"
-			dependency "io.smallrye.reactive:mutiny:1.8.0"
-			dependency "io.projectreactor.tools:blockhound:1.0.6.RELEASE"
+			dependency "io.reactivex.rxjava3:rxjava:3.1.8"
+			dependency "io.smallrye.reactive:mutiny:1.9.0"
+			dependency "io.projectreactor.tools:blockhound:1.0.8.RELEASE"
 
 			dependency "com.caucho:hessian:4.0.63"
 			dependency "com.fasterxml:aalto-xml:1.3.1"
@@ -96,7 +96,7 @@ configure(allprojects) { project ->
 
 			dependency "com.h2database:h2:2.1.214"
 			dependency "com.github.ben-manes.caffeine:caffeine:2.9.3"
-			dependency "com.github.librepdf:openpdf:1.3.30"
+			dependency "com.github.librepdf:openpdf:1.3.33"
 			dependency "com.rometools:rome:1.18.0"
 			dependency "commons-io:commons-io:2.5"
 			dependency "io.vavr:vavr:0.10.4"
@@ -128,18 +128,18 @@ configure(allprojects) { project ->
 			dependency "org.webjars:webjars-locator-core:0.48"
 			dependency "org.webjars:underscorejs:1.8.3"
 
-			dependencySet(group: 'org.apache.tomcat', version: '9.0.73') {
+			dependencySet(group: 'org.apache.tomcat', version: '9.0.82') {
 				entry 'tomcat-util'
 				entry('tomcat-websocket') {
 					exclude group: "org.apache.tomcat", name: "tomcat-servlet-api"
 					exclude group: "org.apache.tomcat", name: "tomcat-websocket-api"
 				}
 			}
-			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.73') {
+			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.82') {
 				entry 'tomcat-embed-core'
 				entry 'tomcat-embed-websocket'
 			}
-			dependencySet(group: 'io.undertow', version: '2.2.23.Final') {
+			dependencySet(group: 'io.undertow', version: '2.2.28.Final') {
 				entry 'undertow-core'
 				entry('undertow-servlet') {
 					exclude group: "org.jboss.spec.javax.servlet", name: "jboss-servlet-api_4.0_spec"
@@ -238,7 +238,7 @@ configure(allprojects) { project ->
 			dependency "com.ibm.websphere:uow:6.0.2.17"
 			dependency "com.jamonapi:jamon:2.82"
 			dependency "joda-time:joda-time:2.10.13"
-			dependency "org.eclipse.persistence:org.eclipse.persistence.jpa:2.7.10"
+			dependency "org.eclipse.persistence:org.eclipse.persistence.jpa:2.7.12"
 			dependency "org.javamoney:moneta:1.3"
 
 			dependency "com.sun.activation:javax.activation:1.2.0"
@@ -340,7 +340,7 @@ configure([rootProject] + javaProjects) { project ->
 	}
 
 	checkstyle {
-		toolVersion = "10.9.1"
+		toolVersion = "10.12.5"
 		configDirectory.set(rootProject.file("src/checkstyle"))
 	}
 

ci/images/ci-image/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:focal-20220922
+FROM ubuntu:jammy-20230624
 
 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh

ci/images/get-jdk-url.sh

@@ -3,10 +3,10 @@ set -e
 
 case "$1" in
 	java8)
-		 echo "https://github.com/bell-sw/Liberica/releases/download/8u345+1/bellsoft-jdk8u345+1-linux-amd64.tar.gz"
+		 echo "https://github.com/bell-sw/Liberica/releases/download/8u372+7/bellsoft-jdk8u372+7-linux-amd64.tar.gz"
 	;;
 	java17)
-		echo "https://github.com/bell-sw/Liberica/releases/download/17.0.4+8/bellsoft-jdk17.0.4+8-linux-amd64.tar.gz"
+		echo "https://github.com/bell-sw/Liberica/releases/download/17.0.7+7/bellsoft-jdk17.0.7+7-linux-amd64.tar.gz"
 	;;
 	*)
 		echo $"Unknown java version"

ci/pipeline.yml

@@ -64,12 +64,6 @@ resource_types:
     <<: *docker-resource-source
     repository: dpb587/github-status-resource
     tag: master
-- name: pull-request
-  type: registry-image
-  source:
-    <<: *docker-resource-source
-    repository: teliaoss/github-pr-resource
-    tag: v0.23.0
 - name: slack-notification
   type: registry-image
   source:
@@ -111,14 +105,6 @@ resources:
     username: ((artifactory-username))
     password: ((artifactory-password))
     build_name: ((build-name))
-- name: git-pull-request
-  type: pull-request
-  icon: source-pull
-  source:
-    access_token: ((github-ci-pull-request-token))
-    repository: ((github-repo-name))
-    base_branch: ((branch))
-    ignore_paths: ["ci/*"]
 - name: repo-status-build
   type: github-status-resource
   icon: eye-check-outline
@@ -259,37 +245,6 @@ jobs:
               <<: *slack-fail-params
     - put: repo-status-jdk17-build
       params: { state: "success", commit: "git-repo" }
-- name: build-pull-requests
-  serial: true
-  public: true
-  plan:
-    - get: ci-image
-    - get: git-repo
-      resource: git-pull-request
-      trigger: true
-      version: every
-    - do:
-      - put: git-pull-request
-        params:
-          path: git-repo
-          status: pending
-      - task: build-pr
-        image: ci-image
-        file: git-repo/ci/tasks/build-pr.yml
-        privileged: true
-        timeout: ((task-timeout))
-        params:
-          BRANCH: ((branch))
-      on_success:
-        put: git-pull-request
-        params:
-          path: git-repo
-          status: success
-      on_failure:
-        put: git-pull-request
-        params:
-          path: git-repo
-          status: failure
 - name: stage-milestone
   serial: true
   plan:
@@ -442,5 +397,3 @@ groups:
   jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone", "promote-rc", "promote-release", "create-github-release"]
 - name: "ci-images"
   jobs: ["build-ci-images"]
-- name: "pull-requests"
-  jobs: [ "build-pull-requests" ]

ci/tasks/generate-changelog.yml

@@ -5,6 +5,8 @@ image_resource:
   source:
     repository: springio/github-changelog-generator
     tag: '0.0.7'
+    username: ((docker-hub-username))
+    password: ((docker-hub-password))
 inputs:
 - name: git-repo
 - name: artifactory-repo

ci/tasks/promote-version.yml

@@ -5,6 +5,8 @@ image_resource:
   source:
     repository: springio/concourse-release-scripts
     tag: '0.3.4'
+    username: ((docker-hub-username))
+    password: ((docker-hub-password))
 inputs:
 - name: git-repo
 - name: artifactory-repo

gradle.properties

@@ -1,4 +1,4 @@
-version=5.3.26-SNAPSHOT
+version=5.3.31
 org.gradle.jvmargs=-Xmx2048m
 org.gradle.caching=true
 org.gradle.parallel=true

gradle/docs.gradle

@@ -3,7 +3,7 @@ configurations {
 }
 
 dependencies {
-	asciidoctorExt("io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:0.5.0")
+	asciidoctorExt("io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:0.6.1")
 }
 
 repositories {
@@ -73,9 +73,8 @@ pluginManager.withPlugin("kotlin") {
 }
 
 task downloadResources(type: Download) {
-	def version = "0.2.5"
-	src "https://repo.spring.io/release/io/spring/docresources/" +
-			"spring-doc-resources/$version/spring-doc-resources-${version}.zip"
+	src "https://repo.spring.io/artifactory/snapshot/io/spring/docresources/" +
+			"spring-doc-resources/0.2.6-SNAPSHOT/spring-doc-resources-0.2.6-20210308.231804-2.zip"
 	dest project.file("$buildDir/docs/spring-doc-resources.zip")
 	onlyIfModified true
 	useETag "all"

integration-tests/src/test/java/org/springframework/scheduling/annotation/ScheduledAndTransactionalAnnotationIntegrationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,8 +60,8 @@ class ScheduledAndTransactionalAnnotationIntegrationTests {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
 		ctx.register(Config.class, JdkProxyTxConfig.class, RepoConfigA.class);
 		assertThatExceptionOfType(BeanCreationException.class)
-			.isThrownBy(ctx::refresh)
-			.withCauseInstanceOf(IllegalStateException.class);
+				.isThrownBy(ctx::refresh)
+				.withCauseInstanceOf(IllegalStateException.class);
 	}
 
 	@Test
@@ -70,7 +70,7 @@ class ScheduledAndTransactionalAnnotationIntegrationTests {
 		ctx.register(Config.class, SubclassProxyTxConfig.class, RepoConfigA.class);
 		ctx.refresh();
 
-		Thread.sleep(100);  // allow @Scheduled method to be called several times
+		Thread.sleep(200);  // allow @Scheduled method to be called several times
 
 		MyRepository repository = ctx.getBean(MyRepository.class);
 		CallCountingTransactionManager txManager = ctx.getBean(CallCountingTransactionManager.class);
@@ -85,7 +85,7 @@ class ScheduledAndTransactionalAnnotationIntegrationTests {
 		ctx.register(Config.class, JdkProxyTxConfig.class, RepoConfigB.class);
 		ctx.refresh();
 
-		Thread.sleep(100);  // allow @Scheduled method to be called several times
+		Thread.sleep(200);  // allow @Scheduled method to be called several times
 
 		MyRepositoryWithScheduledMethod repository = ctx.getBean(MyRepositoryWithScheduledMethod.class);
 		CallCountingTransactionManager txManager = ctx.getBean(CallCountingTransactionManager.class);
@@ -100,7 +100,7 @@ class ScheduledAndTransactionalAnnotationIntegrationTests {
 		ctx.register(AspectConfig.class, MyRepositoryWithScheduledMethodImpl.class);
 		ctx.refresh();
 
-		Thread.sleep(100);  // allow @Scheduled method to be called several times
+		Thread.sleep(200);  // allow @Scheduled method to be called several times
 
 		MyRepositoryWithScheduledMethod repository = ctx.getBean(MyRepositoryWithScheduledMethod.class);
 		assertThat(AopUtils.isCglibProxy(repository)).isTrue();

spring-aop/src/main/java/org/springframework/aop/aspectj/AspectJAdviceParameterNameDiscoverer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,6 +38,14 @@ import org.springframework.util.StringUtils;
  * for an advice method from the pointcut expression, returning, and throwing clauses.
  * If an unambiguous interpretation is not available, it returns {@code null}.
  *
+ * <h3>Algorithm Summary</h3>
+ * <p>If an unambiguous binding can be deduced, then it is.
+ * If the advice requirements cannot possibly be satisfied, then {@code null}
+ * is returned. By setting the {@link #setRaiseExceptions(boolean) raiseExceptions}
+ * property to {@code true}, descriptive exceptions will be thrown instead of
+ * returning {@code null} in the case that the parameter names cannot be discovered.
+ *
+ * <h3>Algorithm Details</h3>
  * <p>This class interprets arguments in the following way:
  * <ol>
  * <li>If the first parameter of the method is of type {@link JoinPoint}
@@ -65,15 +73,15 @@ import org.springframework.util.StringUtils;
  * zero we proceed to the next stage. If {@code a} &gt; 1 then an
  * {@code AmbiguousBindingException} is raised. If {@code a} == 1,
  * and there are no unbound arguments of type {@code Annotation+},
- * then an {@code IllegalArgumentException} is raised. if there is
+ * then an {@code IllegalArgumentException} is raised. If there is
  * exactly one such argument, then the corresponding parameter name is
  * assigned the value from the pointcut expression.</li>
- * <li>If a returningName has been set, and there are no unbound arguments
+ * <li>If a {@code returningName} has been set, and there are no unbound arguments
  * then an {@code IllegalArgumentException} is raised. If there is
  * more than one unbound argument then an
  * {@code AmbiguousBindingException} is raised. If there is exactly
  * one unbound argument then the corresponding parameter name is assigned
- * the value &lt;returningName&gt;.</li>
+ * the value of the {@code returningName}.</li>
  * <li>If there remain unbound arguments, then the pointcut expression is
  * examined once more for {@code this}, {@code target}, and
  * {@code args} pointcut expressions used in the binding form (binding
@@ -99,20 +107,12 @@ import org.springframework.util.StringUtils;
  * <p>The behavior on raising an {@code IllegalArgumentException} or
  * {@code AmbiguousBindingException} is configurable to allow this discoverer
  * to be used as part of a chain-of-responsibility. By default the condition will
- * be logged and the {@code getParameterNames(..)} method will simply return
+ * be logged and the {@link #getParameterNames(Method)} method will simply return
  * {@code null}. If the {@link #setRaiseExceptions(boolean) raiseExceptions}
  * property is set to {@code true}, the conditions will be thrown as
  * {@code IllegalArgumentException} and {@code AmbiguousBindingException},
  * respectively.
  *
- * <p>Was that perfectly clear? ;)
- *
- * <p>Short version: If an unambiguous binding can be deduced, then it is.
- * If the advice requirements cannot possibly be satisfied, then {@code null}
- * is returned. By setting the {@link #setRaiseExceptions(boolean) raiseExceptions}
- * property to {@code true}, descriptive exceptions will be thrown instead of
- * returning {@code null} in the case that the parameter names cannot be discovered.
- *
  * @author Adrian Colyer
  * @author Juergen Hoeller
  * @since 2.0
@@ -158,7 +158,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 
 	/** The pointcut expression associated with the advice, as a simple String. */
 	@Nullable
-	private String pointcutExpression;
+	private final String pointcutExpression;
 
 	private boolean raiseExceptions;
 
@@ -197,7 +197,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 
 	/**
 	 * If {@code afterReturning} advice binds the return value, the
-	 * returning variable name must be specified.
+	 * {@code returning} variable name must be specified.
 	 * @param returningName the name of the returning variable
 	 */
 	public void setReturningName(@Nullable String returningName) {
@@ -206,18 +206,17 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 
 	/**
 	 * If {@code afterThrowing} advice binds the thrown value, the
-	 * throwing variable name must be specified.
+	 * {@code throwing} variable name must be specified.
 	 * @param throwingName the name of the throwing variable
 	 */
 	public void setThrowingName(@Nullable String throwingName) {
 		this.throwingName = throwingName;
 	}
 
-
 	/**
 	 * Deduce the parameter names for an advice method.
-	 * <p>See the {@link AspectJAdviceParameterNameDiscoverer class level javadoc}
-	 * for this class for details of the algorithm used.
+	 * <p>See the {@link AspectJAdviceParameterNameDiscoverer class-level javadoc}
+	 * for this class for details on the algorithm used.
 	 * @param method the target {@link Method}
 	 * @return the parameter names
 	 */
@@ -316,13 +315,13 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 	}
 
 
-	private void bindParameterName(int index, String name) {
+	private void bindParameterName(int index, @Nullable String name) {
 		this.parameterNameBindings[index] = name;
 		this.numberOfRemainingUnboundArguments--;
 	}
 
 	/**
-	 * If the first parameter is of type JoinPoint or ProceedingJoinPoint,bind "thisJoinPoint" as
+	 * If the first parameter is of type JoinPoint or ProceedingJoinPoint, bind "thisJoinPoint" as
 	 * parameter name and return true, else return false.
 	 */
 	private boolean maybeBindThisJoinPoint() {
@@ -367,8 +366,8 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 		}
 
 		if (throwableIndex == -1) {
-			throw new IllegalStateException("Binding of throwing parameter '" + this.throwingName
-					+ "' could not be completed as no available arguments are a subtype of Throwable");
+			throw new IllegalStateException("Binding of throwing parameter '" + this.throwingName +
+					"' could not be completed as no available arguments are a subtype of Throwable");
 		}
 		else {
 			bindParameterName(throwableIndex, this.throwingName);
@@ -400,7 +399,6 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 		}
 	}
 
-
 	/**
 	 * Parse the string pointcut expression looking for:
 	 * &#64;this, &#64;target, &#64;args, &#64;within, &#64;withincode, &#64;annotation.
@@ -465,7 +463,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 		}
 	}
 
-	/*
+	/**
 	 * If the token starts meets Java identifier conventions, it's in.
 	 */
 	@Nullable
@@ -533,7 +531,6 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 			}
 		}
 
-
 		if (varNames.size() > 1) {
 			throw new AmbiguousBindingException("Found " + varNames.size() +
 					" candidate this(), target() or args() variables but only one unbound argument slot");
@@ -609,7 +606,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 		// else varNames.size must be 0 and we have nothing to bind.
 	}
 
-	/*
+	/**
 	 * We've found the start of a binding pointcut at the given index into the
 	 * token array. Now we need to extract the pointcut body and return it.
 	 */
@@ -709,7 +706,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 		return false;
 	}
 
-	/*
+	/**
 	 * Return {@code true} if the given argument type is a subclass
 	 * of the given supertype.
 	 */
@@ -737,7 +734,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 		return count;
 	}
 
-	/*
+	/**
 	 * Find the argument index with the given type, and bind the given
 	 * {@code varName} in that position.
 	 */

spring-aop/src/main/java/org/springframework/aop/aspectj/AspectJExpressionPointcut.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -248,8 +248,8 @@ public class AspectJExpressionPointcut extends AbstractExpressionPointcut
 
 	/**
 	 * If a pointcut expression has been specified in XML, the user cannot
-	 * write {@code and} as "&&" (though && will work).
-	 * We also allow {@code and} between two pointcut sub-expressions.
+	 * write "and" as "&&" (though {@code &&} will work).
+	 * <p>We also allow "and" between two pointcut sub-expressions.
 	 * <p>This method converts back to {@code &&} for the AspectJ pointcut parser.
 	 */
 	private String replaceBooleanOperators(String pcExpr) {
@@ -527,7 +527,7 @@ public class AspectJExpressionPointcut extends AbstractExpressionPointcut
 			return false;
 		}
 		AspectJExpressionPointcut otherPc = (AspectJExpressionPointcut) other;
-		return ObjectUtils.nullSafeEquals(this.getExpression(), otherPc.getExpression()) &&
+		return ObjectUtils.nullSafeEquals(getExpression(), otherPc.getExpression()) &&
 				ObjectUtils.nullSafeEquals(this.pointcutDeclarationScope, otherPc.pointcutDeclarationScope) &&
 				ObjectUtils.nullSafeEquals(this.pointcutParameterNames, otherPc.pointcutParameterNames) &&
 				ObjectUtils.nullSafeEquals(this.pointcutParameterTypes, otherPc.pointcutParameterTypes);
@@ -535,7 +535,7 @@ public class AspectJExpressionPointcut extends AbstractExpressionPointcut
 
 	@Override
 	public int hashCode() {
-		int hashCode = ObjectUtils.nullSafeHashCode(this.getExpression());
+		int hashCode = ObjectUtils.nullSafeHashCode(getExpression());
 		hashCode = 31 * hashCode + ObjectUtils.nullSafeHashCode(this.pointcutDeclarationScope);
 		hashCode = 31 * hashCode + ObjectUtils.nullSafeHashCode(this.pointcutParameterNames);
 		hashCode = 31 * hashCode + ObjectUtils.nullSafeHashCode(this.pointcutParameterTypes);

spring-aop/src/main/java/org/springframework/aop/framework/AdvisedSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -521,6 +521,7 @@ public class AdvisedSupport extends ProxyConfig implements Advised {
 		copy.copyFrom(this);
 		copy.targetSource = EmptyTargetSource.forClass(getTargetClass(), getTargetSource().isStatic());
 		copy.advisorChainFactory = this.advisorChainFactory;
+		copy.methodCache = this.methodCache;
 		copy.interfaces = new ArrayList<>(this.interfaces);
 		copy.advisors = new ArrayList<>(this.advisors);
 		return copy;

spring-aop/src/main/java/org/springframework/aop/framework/CglibAopProxy.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -283,8 +283,8 @@ class CglibAopProxy implements AopProxy, Serializable {
 
 	private Callback[] getCallbacks(Class<?> rootClass) throws Exception {
 		// Parameters used for optimization choices...
-		boolean exposeProxy = this.advised.isExposeProxy();
 		boolean isFrozen = this.advised.isFrozen();
+		boolean exposeProxy = this.advised.isExposeProxy();
 		boolean isStatic = this.advised.getTargetSource().isStatic();
 
 		// Choose an "aop" interceptor (used for AOP calls).
@@ -424,10 +424,9 @@ class CglibAopProxy implements AopProxy, Serializable {
 
 
 	/**
-	 * Method interceptor used for static targets with no advice chain. The call
-	 * is passed directly back to the target. Used when the proxy needs to be
-	 * exposed and it can't be determined that the method won't return
-	 * {@code this}.
+	 * Method interceptor used for static targets with no advice chain. The call is
+	 * passed directly back to the target. Used when the proxy needs to be exposed
+	 * and it can't be determined that the method won't return {@code this}.
 	 */
 	private static class StaticUnadvisedInterceptor implements MethodInterceptor, Serializable {
 
@@ -899,9 +898,9 @@ class CglibAopProxy implements AopProxy, Serializable {
 			// Proxy is not yet available, but that shouldn't matter.
 			List<?> chain = this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, targetClass);
 			boolean haveAdvice = !chain.isEmpty();
+			boolean isFrozen = this.advised.isFrozen();
 			boolean exposeProxy = this.advised.isExposeProxy();
 			boolean isStatic = this.advised.getTargetSource().isStatic();
-			boolean isFrozen = this.advised.isFrozen();
 			if (haveAdvice || !isFrozen) {
 				// If exposing the proxy, then AOP_PROXY must be used.
 				if (exposeProxy) {
@@ -970,6 +969,9 @@ class CglibAopProxy implements AopProxy, Serializable {
 			if (this.advised.isExposeProxy() != otherAdvised.isExposeProxy()) {
 				return false;
 			}
+			if (this.advised.isOpaque() != otherAdvised.isOpaque()) {
+				return false;
+			}
 			if (this.advised.getTargetSource().isStatic() != otherAdvised.getTargetSource().isStatic()) {
 				return false;
 			}
@@ -1016,10 +1018,6 @@ class CglibAopProxy implements AopProxy, Serializable {
 				Advice advice = advisor.getAdvice();
 				hashCode = 13 * hashCode + advice.getClass().hashCode();
 			}
-			hashCode = 13 * hashCode + (this.advised.isFrozen() ? 1 : 0);
-			hashCode = 13 * hashCode + (this.advised.isExposeProxy() ? 1 : 0);
-			hashCode = 13 * hashCode + (this.advised.isOptimize() ? 1 : 0);
-			hashCode = 13 * hashCode + (this.advised.isOpaque() ? 1 : 0);
 			return hashCode;
 		}
 	}

spring-aop/src/main/java/org/springframework/aop/framework/JdkDynamicAopProxy.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -123,7 +123,33 @@ final class JdkDynamicAopProxy implements AopProxy, InvocationHandler, Serializa
 		if (logger.isTraceEnabled()) {
 			logger.trace("Creating JDK dynamic proxy: " + this.advised.getTargetSource());
 		}
-		return Proxy.newProxyInstance(classLoader, this.proxiedInterfaces, this);
+		return Proxy.newProxyInstance(determineClassLoader(classLoader), this.proxiedInterfaces, this);
+	}
+
+	/**
+	 * Determine whether the JDK bootstrap or platform loader has been suggested ->
+	 * use higher-level loader which can see Spring infrastructure classes instead.
+	 */
+	private ClassLoader determineClassLoader(@Nullable ClassLoader classLoader) {
+		if (classLoader == null) {
+			// JDK bootstrap loader -> use spring-aop ClassLoader instead.
+			return getClass().getClassLoader();
+		}
+		if (classLoader.getParent() == null) {
+			// Potentially the JDK platform loader on JDK 9+
+			ClassLoader aopClassLoader = getClass().getClassLoader();
+			ClassLoader aopParent = aopClassLoader.getParent();
+			while (aopParent != null) {
+				if (classLoader == aopParent) {
+					// Suggested ClassLoader is ancestor of spring-aop ClassLoader
+					// -> use spring-aop ClassLoader itself instead.
+					return aopClassLoader;
+				}
+				aopParent = aopParent.getParent();
+			}
+		}
+		// Regular case: use suggested ClassLoader as-is.
+		return classLoader;
 	}
 
 	/**

spring-aop/src/main/java/org/springframework/aop/framework/autoproxy/target/AbstractBeanFactoryBasedTargetSourceCreator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,6 +34,7 @@ import org.springframework.beans.factory.config.ConfigurableBeanFactory;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.beans.factory.support.GenericBeanDefinition;
 import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
 
 /**
  * Convenient superclass for
@@ -81,6 +82,11 @@ public abstract class AbstractBeanFactoryBasedTargetSourceCreator
 		return this.beanFactory;
 	}
 
+	private ConfigurableBeanFactory getConfigurableBeanFactory() {
+		Assert.state(this.beanFactory != null, "BeanFactory not set");
+		return this.beanFactory;
+	}
+
 
 	//---------------------------------------------------------------------
 	// Implementation of the TargetSourceCreator interface
@@ -104,7 +110,7 @@ public abstract class AbstractBeanFactoryBasedTargetSourceCreator
 		// We need to override just this bean definition, as it may reference other beans
 		// and we're happy to take the parent's definition for those.
 		// Always use prototype scope if demanded.
-		BeanDefinition bd = this.beanFactory.getMergedBeanDefinition(beanName);
+		BeanDefinition bd = getConfigurableBeanFactory().getMergedBeanDefinition(beanName);
 		GenericBeanDefinition bdCopy = new GenericBeanDefinition(bd);
 		if (isPrototypeBased()) {
 			bdCopy.setScope(BeanDefinition.SCOPE_PROTOTYPE);
@@ -126,7 +132,7 @@ public abstract class AbstractBeanFactoryBasedTargetSourceCreator
 	protected DefaultListableBeanFactory getInternalBeanFactoryForBean(String beanName) {
 		synchronized (this.internalBeanFactories) {
 			return this.internalBeanFactories.computeIfAbsent(beanName,
-					name -> buildInternalBeanFactory(this.beanFactory));
+					name -> buildInternalBeanFactory(getConfigurableBeanFactory()));
 		}
 	}
 

spring-aop/src/main/java/org/springframework/aop/target/AbstractBeanFactoryBasedTargetSource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,6 +24,8 @@ import org.apache.commons.logging.LogFactory;
 import org.springframework.aop.TargetSource;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.BeanFactoryAware;
+import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
 import org.springframework.util.ObjectUtils;
 
 /**
@@ -57,15 +59,18 @@ public abstract class AbstractBeanFactoryBasedTargetSource implements TargetSour
 	protected final Log logger = LogFactory.getLog(getClass());
 
 	/** Name of the target bean we will create on each invocation. */
+	@Nullable
 	private String targetBeanName;
 
 	/** Class of the target. */
+	@Nullable
 	private volatile Class<?> targetClass;
 
 	/**
 	 * BeanFactory that owns this TargetSource. We need to hold onto this
 	 * reference so that we can create new prototype instances as necessary.
 	 */
+	@Nullable
 	private BeanFactory beanFactory;
 
 
@@ -86,6 +91,7 @@ public abstract class AbstractBeanFactoryBasedTargetSource implements TargetSour
 	 * Return the name of the target bean in the factory.
 	 */
 	public String getTargetBeanName() {
+		Assert.state(this.targetBeanName != null, "Target bean name not set");
 		return this.targetBeanName;
 	}
 
@@ -115,11 +121,13 @@ public abstract class AbstractBeanFactoryBasedTargetSource implements TargetSour
 	 * Return the owning BeanFactory.
 	 */
 	public BeanFactory getBeanFactory() {
+		Assert.state(this.beanFactory != null, "BeanFactory not set");
 		return this.beanFactory;
 	}
 
 
 	@Override
+	@Nullable
 	public Class<?> getTargetClass() {
 		Class<?> targetClass = this.targetClass;
 		if (targetClass != null) {
@@ -128,7 +136,7 @@ public abstract class AbstractBeanFactoryBasedTargetSource implements TargetSour
 		synchronized (this) {
 			// Full check within synchronization, entering the BeanFactory interaction algorithm only once...
 			targetClass = this.targetClass;
-			if (targetClass == null && this.beanFactory != null) {
+			if (targetClass == null && this.beanFactory != null && this.targetBeanName != null) {
 				// Determine type of the target bean.
 				targetClass = this.beanFactory.getType(this.targetBeanName);
 				if (targetClass == null) {
@@ -182,18 +190,16 @@ public abstract class AbstractBeanFactoryBasedTargetSource implements TargetSour
 
 	@Override
 	public int hashCode() {
-		int hashCode = getClass().hashCode();
-		hashCode = 13 * hashCode + ObjectUtils.nullSafeHashCode(this.beanFactory);
-		hashCode = 13 * hashCode + ObjectUtils.nullSafeHashCode(this.targetBeanName);
-		return hashCode;
+		return getClass().hashCode() * 13 + ObjectUtils.nullSafeHashCode(this.targetBeanName);
 	}
 
 	@Override
 	public String toString() {
 		StringBuilder sb = new StringBuilder(getClass().getSimpleName());
 		sb.append(" for target bean '").append(this.targetBeanName).append('\'');
-		if (this.targetClass != null) {
-			sb.append(" of type [").append(this.targetClass.getName()).append(']');
+		Class<?> targetClass = this.targetClass;
+		if (targetClass != null) {
+			sb.append(" of type [").append(targetClass.getName()).append(']');
 		}
 		return sb.toString();
 	}

spring-aop/src/main/java/org/springframework/aop/target/AbstractLazyCreationTargetSource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -46,6 +46,7 @@ public abstract class AbstractLazyCreationTargetSource implements TargetSource {
 	protected final Log logger = LogFactory.getLog(getClass());
 
 	/** The lazily initialized target object. */
+	@Nullable
 	private Object lazyTarget;
 
 

spring-aop/src/main/java/org/springframework/aop/target/EmptyTargetSource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -70,6 +70,7 @@ public final class EmptyTargetSource implements TargetSource, Serializable {
 	// Instance implementation
 	//---------------------------------------------------------------------
 
+	@Nullable
 	private final Class<?> targetClass;
 
 	private final boolean isStatic;

spring-aop/src/main/java/org/springframework/aop/target/HotSwappableTargetSource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -95,8 +95,7 @@ public class HotSwappableTargetSource implements TargetSource, Serializable {
 
 
 	/**
-	 * Two HotSwappableTargetSources are equal if the current target
-	 * objects are equal.
+	 * Two HotSwappableTargetSources are equal if the current target objects are equal.
 	 */
 	@Override
 	public boolean equals(Object other) {

spring-aop/src/main/java/org/springframework/aop/target/SingletonTargetSource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -82,14 +82,8 @@ public class SingletonTargetSource implements TargetSource, Serializable {
 	 */
 	@Override
 	public boolean equals(Object other) {
-		if (this == other) {
-			return true;
-		}
-		if (!(other instanceof SingletonTargetSource)) {
-			return false;
-		}
-		SingletonTargetSource otherTargetSource = (SingletonTargetSource) other;
-		return this.target.equals(otherTargetSource.target);
+		return (this == other || (other instanceof SingletonTargetSource &&
+				this.target.equals(((SingletonTargetSource) other).target)));
 	}
 
 	/**

spring-aop/src/main/java/org/springframework/aop/target/ThreadLocalTargetSource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -58,7 +58,12 @@ public class ThreadLocalTargetSource extends AbstractPrototypeBasedTargetSource
 	 * is meant to be per thread per instance of the ThreadLocalTargetSource class.
 	 */
 	private final ThreadLocal<Object> targetInThread =
-			new NamedThreadLocal<>("Thread-local instance of bean '" + getTargetBeanName() + "'");
+			new NamedThreadLocal<Object>("Thread-local instance of bean") {
+				@Override
+				public String toString() {
+					return super.toString() + " '" + getTargetBeanName() + "'";
+				}
+			};
 
 	/**
 	 * Set of managed targets, enabling us to keep track of the targets we've created.

spring-aop/src/test/java/org/springframework/aop/framework/ProxyFactoryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,10 @@
 
 package org.springframework.aop.framework;
 
+import java.sql.SQLException;
+import java.sql.Savepoint;
 import java.util.ArrayList;
+import java.util.Date;
 import java.util.List;
 
 import javax.accessibility.Accessible;
@@ -380,6 +383,43 @@ public class ProxyFactoryTests {
 		assertThat(proxy.getName()).isEqualTo("tb");
 	}
 
+	@Test
+	public void testCharSequenceProxy() {
+		CharSequence target = "test";
+		ProxyFactory pf = new ProxyFactory(target);
+		ClassLoader cl = target.getClass().getClassLoader();
+		CharSequence proxy = (CharSequence) pf.getProxy(cl);
+		assertThat(proxy.toString()).isEqualTo(target);
+	}
+
+	@Test
+	public void testDateProxy() {
+		Date target = new Date();
+		ProxyFactory pf = new ProxyFactory(target);
+		pf.setProxyTargetClass(true);
+		ClassLoader cl = target.getClass().getClassLoader();
+		Date proxy = (Date) pf.getProxy(cl);
+		assertThat(proxy.getTime()).isEqualTo(target.getTime());
+	}
+
+	@Test
+	public void testJdbcSavepointProxy() throws SQLException {
+		Savepoint target = new Savepoint() {
+			@Override
+			public int getSavepointId() throws SQLException {
+				return 1;
+			}
+			@Override
+			public String getSavepointName() throws SQLException {
+				return "sp";
+			}
+		};
+		ProxyFactory pf = new ProxyFactory(target);
+		ClassLoader cl = Savepoint.class.getClassLoader();
+		Savepoint proxy = (Savepoint) pf.getProxy(cl);
+		assertThat(proxy.getSavepointName()).isEqualTo("sp");
+	}
+
 
 	@Order(2)
 	public static class A implements Runnable {
@@ -391,7 +431,7 @@ public class ProxyFactoryTests {
 
 
 	@Order(1)
-	public static class B implements Runnable{
+	public static class B implements Runnable {
 
 		@Override
 		public void run() {

spring-aop/src/test/java/org/springframework/aop/framework/adapter/ThrowsAdviceInterceptorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -77,9 +77,7 @@ public class ThrowsAdviceInterceptorTests {
 		given(mi.getMethod()).willReturn(Object.class.getMethod("hashCode"));
 		given(mi.getThis()).willReturn(new Object());
 		given(mi.proceed()).willThrow(ex);
-		assertThatExceptionOfType(FileNotFoundException.class).isThrownBy(() ->
-				ti.invoke(mi))
-			.isSameAs(ex);
+		assertThatExceptionOfType(FileNotFoundException.class).isThrownBy(() -> ti.invoke(mi)).isSameAs(ex);
 		assertThat(th.getCalls()).isEqualTo(1);
 		assertThat(th.getCalls("ioException")).isEqualTo(1);
 	}
@@ -92,9 +90,7 @@ public class ThrowsAdviceInterceptorTests {
 		ConnectException ex = new ConnectException("");
 		MethodInvocation mi = mock(MethodInvocation.class);
 		given(mi.proceed()).willThrow(ex);
-		assertThatExceptionOfType(ConnectException.class).isThrownBy(() ->
-				ti.invoke(mi))
-			.isSameAs(ex);
+		assertThatExceptionOfType(ConnectException.class).isThrownBy(() -> ti.invoke(mi)).isSameAs(ex);
 		assertThat(th.getCalls()).isEqualTo(1);
 		assertThat(th.getCalls("remoteException")).isEqualTo(1);
 	}
@@ -117,9 +113,7 @@ public class ThrowsAdviceInterceptorTests {
 		ConnectException ex = new ConnectException("");
 		MethodInvocation mi = mock(MethodInvocation.class);
 		given(mi.proceed()).willThrow(ex);
-		assertThatExceptionOfType(Throwable.class).isThrownBy(() ->
-				ti.invoke(mi))
-			.isSameAs(t);
+		assertThatExceptionOfType(Throwable.class).isThrownBy(() -> ti.invoke(mi)).isSameAs(t);
 		assertThat(th.getCalls()).isEqualTo(1);
 		assertThat(th.getCalls("remoteException")).isEqualTo(1);
 	}

spring-beans/src/main/java/org/springframework/beans/AbstractNestablePropertyAccessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -1004,18 +1004,20 @@ public abstract class AbstractNestablePropertyAccessor extends AbstractPropertyA
 	 */
 	protected abstract static class PropertyHandler {
 
+		@Nullable
 		private final Class<?> propertyType;
 
 		private final boolean readable;
 
 		private final boolean writable;
 
-		public PropertyHandler(Class<?> propertyType, boolean readable, boolean writable) {
+		public PropertyHandler(@Nullable Class<?> propertyType, boolean readable, boolean writable) {
 			this.propertyType = propertyType;
 			this.readable = readable;
 			this.writable = writable;
 		}
 
+		@Nullable
 		public Class<?> getPropertyType() {
 			return this.propertyType;
 		}

spring-beans/src/main/java/org/springframework/beans/BeanUtils.java

@@ -23,6 +23,7 @@ import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
+import java.lang.reflect.Type;
 import java.net.URI;
 import java.net.URL;
 import java.time.temporal.Temporal;
@@ -30,6 +31,7 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.Date;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -787,38 +789,28 @@ public abstract class BeanUtils {
 		if (editable != null) {
 			if (!editable.isInstance(target)) {
 				throw new IllegalArgumentException("Target class [" + target.getClass().getName() +
-						"] not assignable to Editable class [" + editable.getName() + "]");
+						"] not assignable to editable class [" + editable.getName() + "]");
 			}
 			actualEditable = editable;
 		}
 		PropertyDescriptor[] targetPds = getPropertyDescriptors(actualEditable);
-		List<String> ignoreList = (ignoreProperties != null ? Arrays.asList(ignoreProperties) : null);
+		Set<String> ignoredProps = (ignoreProperties != null ? new HashSet<>(Arrays.asList(ignoreProperties)) : null);
+		CachedIntrospectionResults sourceResults = (actualEditable != source.getClass() ?
+				CachedIntrospectionResults.forClass(source.getClass()) : null);
 
 		for (PropertyDescriptor targetPd : targetPds) {
 			Method writeMethod = targetPd.getWriteMethod();
-			if (writeMethod != null && (ignoreList == null || !ignoreList.contains(targetPd.getName()))) {
-				PropertyDescriptor sourcePd = getPropertyDescriptor(source.getClass(), targetPd.getName());
+			if (writeMethod != null && (ignoredProps == null || !ignoredProps.contains(targetPd.getName()))) {
+				PropertyDescriptor sourcePd = (sourceResults != null ?
+						sourceResults.getPropertyDescriptor(targetPd.getName()) : targetPd);
 				if (sourcePd != null) {
 					Method readMethod = sourcePd.getReadMethod();
 					if (readMethod != null) {
-						ResolvableType sourceResolvableType = ResolvableType.forMethodReturnType(readMethod);
-						ResolvableType targetResolvableType = ResolvableType.forMethodParameter(writeMethod, 0);
-
-						// Ignore generic types in assignable check if either ResolvableType has unresolvable generics.
-						boolean isAssignable =
-								(sourceResolvableType.hasUnresolvableGenerics() || targetResolvableType.hasUnresolvableGenerics() ?
-										ClassUtils.isAssignable(writeMethod.getParameterTypes()[0], readMethod.getReturnType()) :
-										targetResolvableType.isAssignableFrom(sourceResolvableType));
-
-						if (isAssignable) {
+						if (isAssignable(writeMethod, readMethod)) {
 							try {
-								if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {
-									readMethod.setAccessible(true);
-								}
+								ReflectionUtils.makeAccessible(readMethod);
 								Object value = readMethod.invoke(source);
-								if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {
-									writeMethod.setAccessible(true);
-								}
+								ReflectionUtils.makeAccessible(writeMethod);
 								writeMethod.invoke(target, value);
 							}
 							catch (Throwable ex) {
@@ -832,6 +824,24 @@ public abstract class BeanUtils {
 		}
 	}
 
+	private static boolean isAssignable(Method writeMethod, Method readMethod) {
+		Type paramType = writeMethod.getGenericParameterTypes()[0];
+		if (paramType instanceof Class) {
+			return ClassUtils.isAssignable((Class<?>) paramType, readMethod.getReturnType());
+		}
+		else if (paramType.equals(readMethod.getGenericReturnType())) {
+			return true;
+		}
+		else {
+			ResolvableType sourceType = ResolvableType.forMethodReturnType(readMethod);
+			ResolvableType targetType = ResolvableType.forMethodParameter(writeMethod, 0);
+			// Ignore generic types in assignable check if either ResolvableType has unresolvable generics.
+			return (sourceType.hasUnresolvableGenerics() || targetType.hasUnresolvableGenerics() ?
+					ClassUtils.isAssignable(writeMethod.getParameterTypes()[0], readMethod.getReturnType()) :
+					targetType.isAssignableFrom(sourceType));
+		}
+	}
+
 
 	/**
 	 * Inner class to avoid a hard dependency on Kotlin at runtime.
@@ -892,7 +902,6 @@ public abstract class BeanUtils {
 			}
 			return kotlinConstructor.callBy(argParameters);
 		}
-
 	}
 
 }

spring-beans/src/main/java/org/springframework/beans/CachedIntrospectionResults.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -248,9 +248,22 @@ public final class CachedIntrospectionResults {
 				return beanInfo;
 			}
 		}
-		return (shouldIntrospectorIgnoreBeaninfoClasses ?
+
+		BeanInfo beanInfo = (shouldIntrospectorIgnoreBeaninfoClasses ?
 				Introspector.getBeanInfo(beanClass, Introspector.IGNORE_ALL_BEANINFO) :
 				Introspector.getBeanInfo(beanClass));
+
+		// Immediately remove class from Introspector cache to allow for proper garbage
+		// collection on class loader shutdown; we cache it in CachedIntrospectionResults
+		// in a GC-friendly manner. This is necessary (again) for the JDK ClassInfo cache.
+		Class<?> classToFlush = beanClass;
+		do {
+			Introspector.flushFromCaches(classToFlush);
+			classToFlush = classToFlush.getSuperclass();
+		}
+		while (classToFlush != null && classToFlush != Object.class);
+
+		return beanInfo;
 	}
 
 

spring-beans/src/main/java/org/springframework/beans/DirectFieldAccessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -129,7 +129,6 @@ public class DirectFieldAccessor extends AbstractNestablePropertyAccessor {
 				ReflectionUtils.makeAccessible(this.field);
 				return this.field.get(getWrappedInstance());
 			}
-
 			catch (IllegalAccessException ex) {
 				throw new InvalidPropertyException(getWrappedClass(),
 						this.field.getName(), "Field is not accessible", ex);

spring-beans/src/main/java/org/springframework/beans/factory/BeanFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -136,7 +136,10 @@ public interface BeanFactory {
 	 * <p>Translates aliases back to the corresponding canonical bean name.
 	 * <p>Will ask the parent factory if the bean cannot be found in this factory instance.
 	 * @param name the name of the bean to retrieve
-	 * @return an instance of the bean
+	 * @return an instance of the bean.
+	 * Note that the return value will never be {@code null} but possibly a stub for
+	 * {@code null} returned from a factory method, to be checked via {@code equals(null)}.
+	 * Consider using {@link #getBeanProvider(Class)} for resolving optional dependencies.
 	 * @throws NoSuchBeanDefinitionException if there is no bean with the specified name
 	 * @throws BeansException if the bean could not be obtained
 	 */
@@ -152,7 +155,11 @@ public interface BeanFactory {
 	 * <p>Will ask the parent factory if the bean cannot be found in this factory instance.
 	 * @param name the name of the bean to retrieve
 	 * @param requiredType type the bean must match; can be an interface or superclass
-	 * @return an instance of the bean
+	 * @return an instance of the bean.
+	 * Note that the return value will never be {@code null}. In case of a stub for
+	 * {@code null} from a factory method having been resolved for the requested bean, a
+	 * {@code BeanNotOfRequiredTypeException} against the NullBean stub will be raised.
+	 * Consider using {@link #getBeanProvider(Class)} for resolving optional dependencies.
 	 * @throws NoSuchBeanDefinitionException if there is no such bean definition
 	 * @throws BeanNotOfRequiredTypeException if the bean is not of the required type
 	 * @throws BeansException if the bean could not be created

spring-beans/src/main/java/org/springframework/beans/factory/annotation/AutowiredAnnotationBeanPostProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 package org.springframework.beans.factory.annotation;
 
 import java.beans.PropertyDescriptor;
+import java.io.IOException;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.AccessibleObject;
 import java.lang.reflect.Constructor;
@@ -62,6 +63,10 @@ import org.springframework.core.annotation.AnnotationAttributes;
 import org.springframework.core.annotation.AnnotationUtils;
 import org.springframework.core.annotation.MergedAnnotation;
 import org.springframework.core.annotation.MergedAnnotations;
+import org.springframework.core.type.AnnotationMetadata;
+import org.springframework.core.type.MethodMetadata;
+import org.springframework.core.type.classreading.MetadataReaderFactory;
+import org.springframework.core.type.classreading.SimpleMetadataReaderFactory;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
@@ -144,6 +149,9 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 	@Nullable
 	private ConfigurableListableBeanFactory beanFactory;
 
+	@Nullable
+	private MetadataReaderFactory metadataReaderFactory;
+
 	private final Set<String> lookupMethodsChecked = Collections.newSetFromMap(new ConcurrentHashMap<>(256));
 
 	private final Map<Class<?>, Constructor<?>[]> candidateConstructorsCache = new ConcurrentHashMap<>(256);
@@ -238,6 +246,7 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 					"AutowiredAnnotationBeanPostProcessor requires a ConfigurableListableBeanFactory: " + beanFactory);
 		}
 		this.beanFactory = (ConfigurableListableBeanFactory) beanFactory;
+		this.metadataReaderFactory = new SimpleMetadataReaderFactory(this.beanFactory.getBeanClassLoader());
 	}
 
 
@@ -463,12 +472,11 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 			return InjectionMetadata.EMPTY;
 		}
 
-		List<InjectionMetadata.InjectedElement> elements = new ArrayList<>();
+		final List<InjectionMetadata.InjectedElement> elements = new ArrayList<>();
 		Class<?> targetClass = clazz;
 
 		do {
-			final List<InjectionMetadata.InjectedElement> currElements = new ArrayList<>();
-
+			final List<InjectionMetadata.InjectedElement> fieldElements = new ArrayList<>();
 			ReflectionUtils.doWithLocalFields(targetClass, field -> {
 				MergedAnnotation<?> ann = findAutowiredAnnotation(field);
 				if (ann != null) {
@@ -479,10 +487,11 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 						return;
 					}
 					boolean required = determineRequiredStatus(ann);
-					currElements.add(new AutowiredFieldElement(field, required));
+					fieldElements.add(new AutowiredFieldElement(field, required));
 				}
 			});
 
+			final List<InjectionMetadata.InjectedElement> methodElements = new ArrayList<>();
 			ReflectionUtils.doWithLocalMethods(targetClass, method -> {
 				Method bridgedMethod = BridgeMethodResolver.findBridgedMethod(method);
 				if (!BridgeMethodResolver.isVisibilityBridgeMethodPair(method, bridgedMethod)) {
@@ -504,11 +513,12 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 					}
 					boolean required = determineRequiredStatus(ann);
 					PropertyDescriptor pd = BeanUtils.findPropertyForMethod(bridgedMethod, clazz);
-					currElements.add(new AutowiredMethodElement(method, required, pd));
+					methodElements.add(new AutowiredMethodElement(method, required, pd));
 				}
 			});
 
-			elements.addAll(0, currElements);
+			elements.addAll(0, sortMethodElements(methodElements, targetClass));
+			elements.addAll(0, fieldElements);
 			targetClass = targetClass.getSuperclass();
 		}
 		while (targetClass != null && targetClass != Object.class);
@@ -573,6 +583,47 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 		return BeanFactoryUtils.beansOfTypeIncludingAncestors(this.beanFactory, type);
 	}
 
+	/**
+	 * Sort the method elements via ASM for deterministic declaration order if possible.
+	 */
+	private List<InjectionMetadata.InjectedElement> sortMethodElements(
+			List<InjectionMetadata.InjectedElement> methodElements, Class<?> targetClass) {
+
+		if (this.metadataReaderFactory != null && methodElements.size() > 1) {
+			// Try reading the class file via ASM for deterministic declaration order...
+			// Unfortunately, the JVM's standard reflection returns methods in arbitrary
+			// order, even between different runs of the same application on the same JVM.
+			try {
+				AnnotationMetadata asm =
+						this.metadataReaderFactory.getMetadataReader(targetClass.getName()).getAnnotationMetadata();
+				Set<MethodMetadata> asmMethods = asm.getAnnotatedMethods(Autowired.class.getName());
+				if (asmMethods.size() >= methodElements.size()) {
+					List<InjectionMetadata.InjectedElement> candidateMethods = new ArrayList<>(methodElements);
+					List<InjectionMetadata.InjectedElement> selectedMethods = new ArrayList<>(asmMethods.size());
+					for (MethodMetadata asmMethod : asmMethods) {
+						for (Iterator<InjectionMetadata.InjectedElement> it = candidateMethods.iterator(); it.hasNext();) {
+							InjectionMetadata.InjectedElement element = it.next();
+							if (element.getMember().getName().equals(asmMethod.getMethodName())) {
+								selectedMethods.add(element);
+								it.remove();
+								break;
+							}
+						}
+					}
+					if (selectedMethods.size() == methodElements.size()) {
+						// All reflection-detected methods found in ASM method set -> proceed
+						return selectedMethods;
+					}
+				}
+			}
+			catch (IOException ex) {
+				logger.debug("Failed to read class file via ASM for determining @Autowired method order", ex);
+				// No worries, let's continue with the reflection metadata we started with...
+			}
+		}
+		return methodElements;
+	}
+
 	/**
 	 * Register the specified bean as dependent on the autowired beans.
 	 */
@@ -594,7 +645,7 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 	 * Resolve the specified cached method argument or field value.
 	 */
 	@Nullable
-	private Object resolvedCachedArgument(@Nullable String beanName, @Nullable Object cachedArgument) {
+	private Object resolveCachedArgument(@Nullable String beanName, @Nullable Object cachedArgument) {
 		if (cachedArgument instanceof DependencyDescriptor) {
 			DependencyDescriptor descriptor = (DependencyDescriptor) cachedArgument;
 			Assert.state(this.beanFactory != null, "No BeanFactory available");
@@ -629,10 +680,12 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 			Object value;
 			if (this.cached) {
 				try {
-					value = resolvedCachedArgument(beanName, this.cachedFieldValue);
+					value = resolveCachedArgument(beanName, this.cachedFieldValue);
 				}
-				catch (NoSuchBeanDefinitionException ex) {
-					// Unexpected removal of target bean for cached argument -> re-resolve
+				catch (BeansException ex) {
+					// Unexpected target bean mismatch for cached argument -> re-resolve
+					this.cached = false;
+					logger.debug("Failed to resolve cached argument", ex);
 					value = resolveFieldValue(field, bean, beanName);
 				}
 			}
@@ -649,7 +702,7 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 		private Object resolveFieldValue(Field field, Object bean, @Nullable String beanName) {
 			DependencyDescriptor desc = new DependencyDescriptor(field, this.required);
 			desc.setContainingClass(bean.getClass());
-			Set<String> autowiredBeanNames = new LinkedHashSet<>(1);
+			Set<String> autowiredBeanNames = new LinkedHashSet<>(2);
 			Assert.state(beanFactory != null, "No BeanFactory available");
 			TypeConverter typeConverter = beanFactory.getTypeConverter();
 			Object value;
@@ -661,21 +714,23 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 			}
 			synchronized (this) {
 				if (!this.cached) {
-					Object cachedFieldValue = null;
 					if (value != null || this.required) {
-						cachedFieldValue = desc;
+						Object cachedFieldValue = desc;
 						registerDependentBeans(beanName, autowiredBeanNames);
-						if (autowiredBeanNames.size() == 1) {
+						if (value != null && autowiredBeanNames.size() == 1) {
 							String autowiredBeanName = autowiredBeanNames.iterator().next();
 							if (beanFactory.containsBean(autowiredBeanName) &&
 									beanFactory.isTypeMatch(autowiredBeanName, field.getType())) {
-								cachedFieldValue = new ShortcutDependencyDescriptor(
-										desc, autowiredBeanName, field.getType());
+								cachedFieldValue = new ShortcutDependencyDescriptor(desc, autowiredBeanName);
 							}
 						}
+						this.cachedFieldValue = cachedFieldValue;
+						this.cached = true;
+					}
+					else {
+						this.cachedFieldValue = null;
+						// cached flag remains false
 					}
-					this.cachedFieldValue = cachedFieldValue;
-					this.cached = true;
 				}
 			}
 			return value;
@@ -709,10 +764,12 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 			Object[] arguments;
 			if (this.cached) {
 				try {
-					arguments = resolveCachedArguments(beanName);
+					arguments = resolveCachedArguments(beanName, this.cachedMethodArguments);
 				}
-				catch (NoSuchBeanDefinitionException ex) {
-					// Unexpected removal of target bean for cached argument -> re-resolve
+				catch (BeansException ex) {
+					// Unexpected target bean mismatch for cached argument -> re-resolve
+					this.cached = false;
+					logger.debug("Failed to resolve cached argument", ex);
 					arguments = resolveMethodArguments(method, bean, beanName);
 				}
 			}
@@ -731,14 +788,13 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 		}
 
 		@Nullable
-		private Object[] resolveCachedArguments(@Nullable String beanName) {
-			Object[] cachedMethodArguments = this.cachedMethodArguments;
+		private Object[] resolveCachedArguments(@Nullable String beanName, @Nullable Object[] cachedMethodArguments) {
 			if (cachedMethodArguments == null) {
 				return null;
 			}
 			Object[] arguments = new Object[cachedMethodArguments.length];
 			for (int i = 0; i < arguments.length; i++) {
-				arguments[i] = resolvedCachedArgument(beanName, cachedMethodArguments[i]);
+				arguments[i] = resolveCachedArgument(beanName, cachedMethodArguments[i]);
 			}
 			return arguments;
 		}
@@ -748,7 +804,7 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 			int argumentCount = method.getParameterCount();
 			Object[] arguments = new Object[argumentCount];
 			DependencyDescriptor[] descriptors = new DependencyDescriptor[argumentCount];
-			Set<String> autowiredBeans = new LinkedHashSet<>(argumentCount);
+			Set<String> autowiredBeanNames = new LinkedHashSet<>(argumentCount * 2);
 			Assert.state(beanFactory != null, "No BeanFactory available");
 			TypeConverter typeConverter = beanFactory.getTypeConverter();
 			for (int i = 0; i < arguments.length; i++) {
@@ -757,7 +813,7 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 				currDesc.setContainingClass(bean.getClass());
 				descriptors[i] = currDesc;
 				try {
-					Object arg = beanFactory.resolveDependency(currDesc, beanName, autowiredBeans, typeConverter);
+					Object arg = beanFactory.resolveDependency(currDesc, beanName, autowiredBeanNames, typeConverter);
 					if (arg == null && !this.required) {
 						arguments = null;
 						break;
@@ -771,26 +827,27 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 			synchronized (this) {
 				if (!this.cached) {
 					if (arguments != null) {
-						DependencyDescriptor[] cachedMethodArguments = Arrays.copyOf(descriptors, arguments.length);
-						registerDependentBeans(beanName, autowiredBeans);
-						if (autowiredBeans.size() == argumentCount) {
-							Iterator<String> it = autowiredBeans.iterator();
+						DependencyDescriptor[] cachedMethodArguments = Arrays.copyOf(descriptors, argumentCount);
+						registerDependentBeans(beanName, autowiredBeanNames);
+						if (autowiredBeanNames.size() == argumentCount) {
+							Iterator<String> it = autowiredBeanNames.iterator();
 							Class<?>[] paramTypes = method.getParameterTypes();
 							for (int i = 0; i < paramTypes.length; i++) {
 								String autowiredBeanName = it.next();
-								if (beanFactory.containsBean(autowiredBeanName) &&
+								if (arguments[i] != null && beanFactory.containsBean(autowiredBeanName) &&
 										beanFactory.isTypeMatch(autowiredBeanName, paramTypes[i])) {
 									cachedMethodArguments[i] = new ShortcutDependencyDescriptor(
-											descriptors[i], autowiredBeanName, paramTypes[i]);
+											descriptors[i], autowiredBeanName);
 								}
 							}
 						}
 						this.cachedMethodArguments = cachedMethodArguments;
+						this.cached = true;
 					}
 					else {
 						this.cachedMethodArguments = null;
+						// cached flag remains false
 					}
-					this.cached = true;
 				}
 			}
 			return arguments;
@@ -806,17 +863,14 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 
 		private final String shortcut;
 
-		private final Class<?> requiredType;
-
-		public ShortcutDependencyDescriptor(DependencyDescriptor original, String shortcut, Class<?> requiredType) {
+		public ShortcutDependencyDescriptor(DependencyDescriptor original, String shortcut) {
 			super(original);
 			this.shortcut = shortcut;
-			this.requiredType = requiredType;
 		}
 
 		@Override
 		public Object resolveShortcut(BeanFactory beanFactory) {
-			return beanFactory.getBean(this.shortcut, this.requiredType);
+			return beanFactory.getBean(this.shortcut, getDependencyType());
 		}
 	}
 

spring-beans/src/main/java/org/springframework/beans/factory/support/AbstractAutowireCapableBeanFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -1504,8 +1504,8 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
 			converter = bw;
 		}
 
-		Set<String> autowiredBeanNames = new LinkedHashSet<>(4);
 		String[] propertyNames = unsatisfiedNonSimpleProperties(mbd, bw);
+		Set<String> autowiredBeanNames = new LinkedHashSet<>(propertyNames.length * 2);
 		for (String propertyName : propertyNames) {
 			try {
 				PropertyDescriptor pd = bw.getPropertyDescriptor(propertyName);

spring-beans/src/main/java/org/springframework/beans/factory/support/BeanDefinitionValueResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -134,7 +134,7 @@ class BeanDefinitionValueResolver {
 			return resolveInnerBean(argName, innerBeanName, bd);
 		}
 		else if (value instanceof DependencyDescriptor) {
-			Set<String> autowiredBeanNames = new LinkedHashSet<>(4);
+			Set<String> autowiredBeanNames = new LinkedHashSet<>(2);
 			Object result = this.beanFactory.resolveDependency(
 					(DependencyDescriptor) value, this.beanName, autowiredBeanNames, this.typeConverter);
 			for (String autowiredBeanName : autowiredBeanNames) {

spring-beans/src/main/java/org/springframework/beans/factory/support/ConstructorResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -45,6 +45,7 @@ import org.springframework.beans.TypeConverter;
 import org.springframework.beans.TypeMismatchException;
 import org.springframework.beans.factory.BeanCreationException;
 import org.springframework.beans.factory.BeanDefinitionStoreException;
+import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.InjectionPoint;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.beans.factory.NoUniqueBeanDefinitionException;
@@ -85,12 +86,6 @@ class ConstructorResolver {
 
 	private static final Object[] EMPTY_ARGS = new Object[0];
 
-	/**
-	 * Marker for autowired arguments in a cached argument array, to be replaced
-	 * by a {@linkplain #resolveAutowiredArgument resolved autowired argument}.
-	 */
-	private static final Object autowiredArgumentMarker = new Object();
-
 	private static final NamedThreadLocal<InjectionPoint> currentInjectionPoint =
 			new NamedThreadLocal<>("Current injection point");
 
@@ -729,7 +724,7 @@ class ConstructorResolver {
 
 		ArgumentsHolder args = new ArgumentsHolder(paramTypes.length);
 		Set<ConstructorArgumentValues.ValueHolder> usedValueHolders = new HashSet<>(paramTypes.length);
-		Set<String> autowiredBeanNames = new LinkedHashSet<>(4);
+		Set<String> allAutowiredBeanNames = new LinkedHashSet<>(paramTypes.length * 2);
 
 		for (int paramIndex = 0; paramIndex < paramTypes.length; paramIndex++) {
 			Class<?> paramType = paramTypes[paramIndex];
@@ -764,8 +759,8 @@ class ConstructorResolver {
 						throw new UnsatisfiedDependencyException(
 								mbd.getResourceDescription(), beanName, new InjectionPoint(methodParam),
 								"Could not convert argument value of type [" +
-										ObjectUtils.nullSafeClassName(valueHolder.getValue()) +
-										"] to required type [" + paramType.getName() + "]: " + ex.getMessage());
+								ObjectUtils.nullSafeClassName(valueHolder.getValue()) +
+								"] to required type [" + paramType.getName() + "]: " + ex.getMessage());
 					}
 					Object sourceHolder = valueHolder.getSource();
 					if (sourceHolder instanceof ConstructorArgumentValues.ValueHolder) {
@@ -788,11 +783,17 @@ class ConstructorResolver {
 							"] - did you specify the correct bean references as arguments?");
 				}
 				try {
-					Object autowiredArgument = resolveAutowiredArgument(
-							methodParam, beanName, autowiredBeanNames, converter, fallback);
-					args.rawArguments[paramIndex] = autowiredArgument;
-					args.arguments[paramIndex] = autowiredArgument;
-					args.preparedArguments[paramIndex] = autowiredArgumentMarker;
+					ConstructorDependencyDescriptor desc = new ConstructorDependencyDescriptor(methodParam, true);
+					Set<String> autowiredBeanNames = new LinkedHashSet<>(2);
+					Object arg = resolveAutowiredArgument(
+							desc, paramType, beanName, autowiredBeanNames, converter, fallback);
+					if (arg != null) {
+						setShortcutIfPossible(desc, paramType, autowiredBeanNames);
+					}
+					allAutowiredBeanNames.addAll(autowiredBeanNames);
+					args.rawArguments[paramIndex] = arg;
+					args.arguments[paramIndex] = arg;
+					args.preparedArguments[paramIndex] = desc;
 					args.resolveNecessary = true;
 				}
 				catch (BeansException ex) {
@@ -802,14 +803,7 @@ class ConstructorResolver {
 			}
 		}
 
-		for (String autowiredBeanName : autowiredBeanNames) {
-			this.beanFactory.registerDependentBean(autowiredBeanName, beanName);
-			if (logger.isDebugEnabled()) {
-				logger.debug("Autowiring by type from bean name '" + beanName +
-						"' via " + (executable instanceof Constructor ? "constructor" : "factory method") +
-						" to bean named '" + autowiredBeanName + "'");
-			}
-		}
+		registerDependentBeans(executable, beanName, allAutowiredBeanNames);
 
 		return args;
 	}
@@ -829,31 +823,61 @@ class ConstructorResolver {
 		Object[] resolvedArgs = new Object[argsToResolve.length];
 		for (int argIndex = 0; argIndex < argsToResolve.length; argIndex++) {
 			Object argValue = argsToResolve[argIndex];
-			MethodParameter methodParam = MethodParameter.forExecutable(executable, argIndex);
-			if (argValue == autowiredArgumentMarker) {
-				argValue = resolveAutowiredArgument(methodParam, beanName, null, converter, true);
+			Class<?> paramType = paramTypes[argIndex];
+			boolean convertNecessary = false;
+			if (argValue instanceof ConstructorDependencyDescriptor) {
+				ConstructorDependencyDescriptor descriptor = (ConstructorDependencyDescriptor) argValue;
+				try {
+					argValue = resolveAutowiredArgument(descriptor, paramType, beanName,
+							null, converter, true);
+				}
+				catch (BeansException ex) {
+					// Unexpected target bean mismatch for cached argument -> re-resolve
+					Set<String> autowiredBeanNames = null;
+					if (descriptor.hasShortcut()) {
+						// Reset shortcut and try to re-resolve it in this thread...
+						descriptor.setShortcut(null);
+						autowiredBeanNames = new LinkedHashSet<>(2);
+					}
+					logger.debug("Failed to resolve cached argument", ex);
+					argValue = resolveAutowiredArgument(descriptor, paramType, beanName,
+							autowiredBeanNames, converter, true);
+					if (autowiredBeanNames != null && !descriptor.hasShortcut()) {
+						// We encountered as stale shortcut before, and the shortcut has
+						// not been re-resolved by another thread in the meantime...
+						if (argValue != null) {
+							setShortcutIfPossible(descriptor, paramType, autowiredBeanNames);
+						}
+						registerDependentBeans(executable, beanName, autowiredBeanNames);
+					}
+				}
 			}
 			else if (argValue instanceof BeanMetadataElement) {
 				argValue = valueResolver.resolveValueIfNecessary("constructor argument", argValue);
+				convertNecessary = true;
 			}
 			else if (argValue instanceof String) {
 				argValue = this.beanFactory.evaluateBeanDefinitionString((String) argValue, mbd);
+				convertNecessary = true;
 			}
-			Class<?> paramType = paramTypes[argIndex];
-			try {
-				resolvedArgs[argIndex] = converter.convertIfNecessary(argValue, paramType, methodParam);
-			}
-			catch (TypeMismatchException ex) {
-				throw new UnsatisfiedDependencyException(
-						mbd.getResourceDescription(), beanName, new InjectionPoint(methodParam),
-						"Could not convert argument value of type [" + ObjectUtils.nullSafeClassName(argValue) +
-						"] to required type [" + paramType.getName() + "]: " + ex.getMessage());
+			if (convertNecessary) {
+				MethodParameter methodParam = MethodParameter.forExecutable(executable, argIndex);
+				try {
+					argValue = converter.convertIfNecessary(argValue, paramType, methodParam);
+				}
+				catch (TypeMismatchException ex) {
+					throw new UnsatisfiedDependencyException(
+							mbd.getResourceDescription(), beanName, new InjectionPoint(methodParam),
+							"Could not convert argument value of type [" + ObjectUtils.nullSafeClassName(argValue) +
+							"] to required type [" + paramType.getName() + "]: " + ex.getMessage());
+				}
 			}
+			resolvedArgs[argIndex] = argValue;
 		}
 		return resolvedArgs;
 	}
 
-	protected Constructor<?> getUserDeclaredConstructor(Constructor<?> constructor) {
+	private Constructor<?> getUserDeclaredConstructor(Constructor<?> constructor) {
 		Class<?> declaringClass = constructor.getDeclaringClass();
 		Class<?> userClass = ClassUtils.getUserClass(declaringClass);
 		if (userClass != declaringClass) {
@@ -869,23 +893,22 @@ class ConstructorResolver {
 	}
 
 	/**
-	 * Template method for resolving the specified argument which is supposed to be autowired.
+	 * Resolve the specified argument which is supposed to be autowired.
 	 */
 	@Nullable
-	protected Object resolveAutowiredArgument(MethodParameter param, String beanName,
+	Object resolveAutowiredArgument(DependencyDescriptor descriptor, Class<?> paramType, String beanName,
 			@Nullable Set<String> autowiredBeanNames, TypeConverter typeConverter, boolean fallback) {
 
-		Class<?> paramType = param.getParameterType();
 		if (InjectionPoint.class.isAssignableFrom(paramType)) {
 			InjectionPoint injectionPoint = currentInjectionPoint.get();
 			if (injectionPoint == null) {
-				throw new IllegalStateException("No current InjectionPoint available for " + param);
+				throw new IllegalStateException("No current InjectionPoint available for " + descriptor);
 			}
 			return injectionPoint;
 		}
+
 		try {
-			return this.beanFactory.resolveDependency(
-					new DependencyDescriptor(param, true), beanName, autowiredBeanNames, typeConverter);
+			return this.beanFactory.resolveDependency(descriptor, beanName, autowiredBeanNames, typeConverter);
 		}
 		catch (NoUniqueBeanDefinitionException ex) {
 			throw ex;
@@ -908,6 +931,31 @@ class ConstructorResolver {
 		}
 	}
 
+	private void setShortcutIfPossible(
+			ConstructorDependencyDescriptor descriptor, Class<?> paramType, Set<String> autowiredBeanNames) {
+
+		if (autowiredBeanNames.size() == 1) {
+			String autowiredBeanName = autowiredBeanNames.iterator().next();
+			if (this.beanFactory.containsBean(autowiredBeanName) &&
+					this.beanFactory.isTypeMatch(autowiredBeanName, paramType)) {
+				descriptor.setShortcut(autowiredBeanName);
+			}
+		}
+	}
+
+	private void registerDependentBeans(
+			Executable executable, String beanName, Set<String> autowiredBeanNames) {
+
+		for (String autowiredBeanName : autowiredBeanNames) {
+			this.beanFactory.registerDependentBean(autowiredBeanName, beanName);
+			if (logger.isDebugEnabled()) {
+				logger.debug("Autowiring by type from bean name '" + beanName + "' via " +
+						(executable instanceof Constructor ? "constructor" : "factory method") +
+						" to bean named '" + autowiredBeanName + "'");
+			}
+		}
+	}
+
 	static InjectionPoint setCurrentInjectionPoint(@Nullable InjectionPoint injectionPoint) {
 		InjectionPoint old = currentInjectionPoint.get();
 		if (injectionPoint != null) {
@@ -1006,4 +1054,35 @@ class ConstructorResolver {
 		}
 	}
 
+
+	/**
+	 * DependencyDescriptor marker for constructor arguments,
+	 * for differentiating between a provided DependencyDescriptor instance
+	 * and an internally built DependencyDescriptor for autowiring purposes.
+	 */
+	@SuppressWarnings("serial")
+	private static class ConstructorDependencyDescriptor extends DependencyDescriptor {
+
+		@Nullable
+		private volatile String shortcut;
+
+		public ConstructorDependencyDescriptor(MethodParameter methodParameter, boolean required) {
+			super(methodParameter, required);
+		}
+
+		public void setShortcut(@Nullable String shortcut) {
+			this.shortcut = shortcut;
+		}
+
+		public boolean hasShortcut() {
+			return (this.shortcut != null);
+		}
+
+		@Override
+		public Object resolveShortcut(BeanFactory beanFactory) {
+			String shortcut = this.shortcut;
+			return (shortcut != null ? beanFactory.getBean(shortcut, getDependencyType()) : null);
+		}
+	}
+
 }

spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultListableBeanFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -961,7 +961,7 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 		for (String beanName : beanNames) {
 			Object singletonInstance = getSingleton(beanName);
 			if (singletonInstance instanceof SmartInitializingSingleton) {
-				StartupStep smartInitialize = this.getApplicationStartup().start("spring.beans.smart-initialize")
+				StartupStep smartInitialize = getApplicationStartup().start("spring.beans.smart-initialize")
 						.tag("beanName", beanName);
 				SmartInitializingSingleton smartSingleton = (SmartInitializingSingleton) singletonInstance;
 				if (System.getSecurityManager() != null) {

spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultSingletonBeanRegistry.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -102,7 +102,7 @@ public class DefaultSingletonBeanRegistry extends SimpleAliasRegistry implements
 	private boolean singletonsCurrentlyInDestruction = false;
 
 	/** Disposable bean instances: bean name to disposable instance. */
-	private final Map<String, Object> disposableBeans = new LinkedHashMap<>();
+	private final Map<String, DisposableBean> disposableBeans = new LinkedHashMap<>();
 
 	/** Map between containing bean names: bean name to Set of bean names that the bean contains. */
 	private final Map<String, Set<String>> containedBeanMap = new ConcurrentHashMap<>(16);
@@ -340,7 +340,7 @@ public class DefaultSingletonBeanRegistry extends SimpleAliasRegistry implements
 	 * (within the entire factory).
 	 * @param beanName the name of the bean
 	 */
-	public boolean isSingletonCurrentlyInCreation(String beanName) {
+	public boolean isSingletonCurrentlyInCreation(@Nullable String beanName) {
 		return this.singletonsCurrentlyInCreation.contains(beanName);
 	}
 
@@ -447,17 +447,17 @@ public class DefaultSingletonBeanRegistry extends SimpleAliasRegistry implements
 		}
 		String canonicalName = canonicalName(beanName);
 		Set<String> dependentBeans = this.dependentBeanMap.get(canonicalName);
-		if (dependentBeans == null) {
+		if (dependentBeans == null || dependentBeans.isEmpty()) {
 			return false;
 		}
 		if (dependentBeans.contains(dependentBeanName)) {
 			return true;
 		}
+		if (alreadySeen == null) {
+			alreadySeen = new HashSet<>();
+		}
+		alreadySeen.add(beanName);
 		for (String transitiveDependency : dependentBeans) {
-			if (alreadySeen == null) {
-				alreadySeen = new HashSet<>();
-			}
-			alreadySeen.add(beanName);
 			if (isDependent(transitiveDependency, dependentBeanName, alreadySeen)) {
 				return true;
 			}
@@ -554,7 +554,7 @@ public class DefaultSingletonBeanRegistry extends SimpleAliasRegistry implements
 		// Destroy the corresponding DisposableBean instance.
 		DisposableBean disposableBean;
 		synchronized (this.disposableBeans) {
-			disposableBean = (DisposableBean) this.disposableBeans.remove(beanName);
+			disposableBean = this.disposableBeans.remove(beanName);
 		}
 		destroyBean(beanName, disposableBean);
 	}

spring-beans/src/main/java/org/springframework/beans/factory/support/DisposableBeanAdapter.java

@@ -68,8 +68,8 @@ class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {
 
 	private static final String SHUTDOWN_METHOD_NAME = "shutdown";
 
-	private static final Log logger = LogFactory.getLog(DisposableBeanAdapter.class);
 
+	private static final Log logger = LogFactory.getLog(DisposableBeanAdapter.class);
 
 	private final Object bean;
 

spring-beans/src/main/java/org/springframework/beans/factory/support/LookupOverride.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -112,7 +112,7 @@ public class LookupOverride extends MethodOverride {
 
 	@Override
 	public int hashCode() {
-		return (29 * super.hashCode() + ObjectUtils.nullSafeHashCode(this.beanName));
+		return super.hashCode() * 29 + ObjectUtils.nullSafeHashCode(this.beanName);
 	}
 
 	@Override

spring-beans/src/main/java/org/springframework/beans/factory/support/RootBeanDefinition.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -506,23 +506,12 @@ public class RootBeanDefinition extends AbstractBeanDefinition {
 			if (isExternallyManagedInitMethod(initMethod)) {
 				return true;
 			}
-			if (this.externallyManagedInitMethods != null) {
-				for (String candidate : this.externallyManagedInitMethods) {
-					int indexOfDot = candidate.lastIndexOf('.');
-					if (indexOfDot >= 0) {
-						String methodName = candidate.substring(indexOfDot + 1);
-						if (methodName.equals(initMethod)) {
-							return true;
-						}
-					}
-				}
-			}
-			return false;
+			return hasAnyExternallyManagedMethod(this.externallyManagedInitMethods, initMethod);
 		}
 	}
 
 	/**
-	 * Return all externally managed initialization methods (as an immutable Set).
+	 * Get all externally managed initialization methods (as an immutable Set).
 	 * <p>See {@link #registerExternallyManagedInitMethod} for details
 	 * regarding the format for the initialization methods in the returned set.
 	 * @since 5.3.11
@@ -583,19 +572,23 @@ public class RootBeanDefinition extends AbstractBeanDefinition {
 			if (isExternallyManagedDestroyMethod(destroyMethod)) {
 				return true;
 			}
-			if (this.externallyManagedDestroyMethods != null) {
-				for (String candidate : this.externallyManagedDestroyMethods) {
-					int indexOfDot = candidate.lastIndexOf('.');
-					if (indexOfDot >= 0) {
-						String methodName = candidate.substring(indexOfDot + 1);
-						if (methodName.equals(destroyMethod)) {
-							return true;
-						}
+			return hasAnyExternallyManagedMethod(this.externallyManagedDestroyMethods, destroyMethod);
+		}
+	}
+
+	private static boolean hasAnyExternallyManagedMethod(Set<String> candidates, String methodName) {
+		if (candidates != null) {
+			for (String candidate : candidates) {
+				int indexOfDot = candidate.lastIndexOf('.');
+				if (indexOfDot > 0) {
+					String candidateMethodName = candidate.substring(indexOfDot + 1);
+					if (candidateMethodName.equals(methodName)) {
+						return true;
 					}
 				}
 			}
-			return false;
 		}
+		return false;
 	}
 
 	/**

spring-beans/src/test/java/org/springframework/beans/factory/DefaultListableBeanFactoryTests.java

@@ -1271,10 +1271,11 @@ class DefaultListableBeanFactoryTests {
 		lbf.registerBeanDefinition("rod", bd);
 		RootBeanDefinition bd2 = new RootBeanDefinition(TestBean.class);
 		lbf.registerBeanDefinition("rod2", bd2);
-		assertThatExceptionOfType(UnsatisfiedDependencyException.class).isThrownBy(() ->
-				lbf.autowire(ConstructorDependency.class, AutowireCapableBeanFactory.AUTOWIRE_CONSTRUCTOR, false))
-			.withMessageContaining("rod")
-			.withMessageContaining("rod2");
+
+		assertThatExceptionOfType(UnsatisfiedDependencyException.class)
+				.isThrownBy(() -> lbf.autowire(ConstructorDependency.class, AutowireCapableBeanFactory.AUTOWIRE_CONSTRUCTOR, false))
+				.withMessageContaining("rod")
+				.withMessageContaining("rod2");
 	}
 
 	@Test
@@ -1336,11 +1337,12 @@ class DefaultListableBeanFactoryTests {
 		RootBeanDefinition bd2 = new RootBeanDefinition(TestBean.class);
 		bd2.setDependsOn("tb1");
 		lbf.registerBeanDefinition("tb2", bd2);
-		assertThatExceptionOfType(BeanCreationException.class).isThrownBy(() ->
-				lbf.preInstantiateSingletons())
-			.withMessageContaining("Circular")
-			.withMessageContaining("'tb2'")
-			.withMessageContaining("'tb1'");
+
+		assertThatExceptionOfType(BeanCreationException.class)
+				.isThrownBy(() -> lbf.preInstantiateSingletons())
+				.withMessageContaining("Circular")
+				.withMessageContaining("'tb2'")
+				.withMessageContaining("'tb1'");
 	}
 
 	@Test
@@ -1354,11 +1356,12 @@ class DefaultListableBeanFactoryTests {
 		RootBeanDefinition bd3 = new RootBeanDefinition(TestBean.class);
 		bd3.setDependsOn("tb1");
 		lbf.registerBeanDefinition("tb3", bd3);
-		assertThatExceptionOfType(BeanCreationException.class).isThrownBy(
-				lbf::preInstantiateSingletons)
-			.withMessageContaining("Circular")
-			.withMessageContaining("'tb3'")
-			.withMessageContaining("'tb1'");
+
+		assertThatExceptionOfType(BeanCreationException.class)
+				.isThrownBy(lbf::preInstantiateSingletons)
+				.withMessageContaining("Circular")
+				.withMessageContaining("'tb3'")
+				.withMessageContaining("'tb1'");
 	}
 
 	@Test
@@ -1493,10 +1496,11 @@ class DefaultListableBeanFactoryTests {
 		RootBeanDefinition bd2 = new RootBeanDefinition(HighPriorityTestBean.class);
 		lbf.registerBeanDefinition("bd1", bd1);
 		lbf.registerBeanDefinition("bd2", bd2);
-		assertThatExceptionOfType(NoUniqueBeanDefinitionException.class).isThrownBy(() ->
-				lbf.getBean(TestBean.class))
-			.withMessageContaining("Multiple beans found with the same priority")
-			.withMessageContaining("5"); // conflicting priority
+
+		assertThatExceptionOfType(NoUniqueBeanDefinitionException.class)
+				.isThrownBy(() -> lbf.getBean(TestBean.class))
+				.withMessageContaining("Multiple beans found with the same priority")
+				.withMessageContaining("5"); // conflicting priority
 	}
 
 	@Test
@@ -1698,9 +1702,9 @@ class DefaultListableBeanFactoryTests {
 		lbf.registerBeanDefinition("bd1", bd1);
 		lbf.registerBeanDefinition("bd2", bd2);
 
-		assertThatExceptionOfType(NoUniqueBeanDefinitionException.class).isThrownBy(() ->
-				lbf.getBean(ConstructorDependency.class, 42))
-			.withMessageContaining("more than one 'primary'");
+		assertThatExceptionOfType(NoUniqueBeanDefinitionException.class)
+				.isThrownBy(() -> lbf.getBean(ConstructorDependency.class, 42))
+				.withMessageContaining("more than one 'primary'");
 	}
 
 	@Test
@@ -1881,10 +1885,11 @@ class DefaultListableBeanFactoryTests {
 		RootBeanDefinition bd2 = new RootBeanDefinition(TestBean.class);
 		lbf.registerBeanDefinition("test", bd);
 		lbf.registerBeanDefinition("spouse", bd2);
-		assertThatExceptionOfType(UnsatisfiedDependencyException.class).isThrownBy(() ->
-				lbf.autowire(DependenciesBean.class, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true))
-			.withMessageContaining("test")
-			.withMessageContaining("spouse");
+
+		assertThatExceptionOfType(UnsatisfiedDependencyException.class)
+				.isThrownBy(() -> lbf.autowire(DependenciesBean.class, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true))
+				.withMessageContaining("test")
+				.withMessageContaining("spouse");
 	}
 
 	@Test
@@ -1946,10 +1951,11 @@ class DefaultListableBeanFactoryTests {
 		RootBeanDefinition bd2 = new RootBeanDefinition(HighPriorityTestBean.class);
 		lbf.registerBeanDefinition("test", bd);
 		lbf.registerBeanDefinition("spouse", bd2);
-		assertThatExceptionOfType(UnsatisfiedDependencyException.class).isThrownBy(() ->
-				lbf.autowire(DependenciesBean.class, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true))
-			.withCauseExactlyInstanceOf(NoUniqueBeanDefinitionException.class)
-			.withMessageContaining("5");
+
+		assertThatExceptionOfType(UnsatisfiedDependencyException.class)
+				.isThrownBy(() -> lbf.autowire(DependenciesBean.class, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true))
+				.withCauseExactlyInstanceOf(NoUniqueBeanDefinitionException.class)
+				.withMessageContaining("5");
 	}
 
 	@Test
@@ -2185,19 +2191,21 @@ class DefaultListableBeanFactoryTests {
 	@Test
 	void beanDefinitionWithInterface() {
 		lbf.registerBeanDefinition("test", new RootBeanDefinition(ITestBean.class));
-		assertThatExceptionOfType(BeanCreationException.class).isThrownBy(() ->
-				lbf.getBean("test"))
-			.withMessageContaining("interface")
-			.satisfies(ex -> assertThat(ex.getBeanName()).isEqualTo("test"));
+
+		assertThatExceptionOfType(BeanCreationException.class)
+				.isThrownBy(() -> lbf.getBean("test"))
+				.withMessageContaining("interface")
+				.satisfies(ex -> assertThat(ex.getBeanName()).isEqualTo("test"));
 	}
 
 	@Test
 	void beanDefinitionWithAbstractClass() {
 		lbf.registerBeanDefinition("test", new RootBeanDefinition(AbstractBeanFactory.class));
-		assertThatExceptionOfType(BeanCreationException.class).isThrownBy(() ->
-				lbf.getBean("test"))
-			.withMessageContaining("abstract")
-			.satisfies(ex -> assertThat(ex.getBeanName()).isEqualTo("test"));
+
+		assertThatExceptionOfType(BeanCreationException.class)
+				.isThrownBy(() -> lbf.getBean("test"))
+				.withMessageContaining("abstract")
+				.satisfies(ex -> assertThat(ex.getBeanName()).isEqualTo("test"));
 	}
 
 	@Test

spring-beans/src/test/java/org/springframework/beans/factory/support/DefaultSingletonBeanRegistryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,36 +28,32 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Chris Beams
  * @since 04.07.2006
  */
-public class DefaultSingletonBeanRegistryTests {
+class DefaultSingletonBeanRegistryTests {
+
+	private final DefaultSingletonBeanRegistry beanRegistry = new DefaultSingletonBeanRegistry();
+
 
 	@Test
-	public void testSingletons() {
-		DefaultSingletonBeanRegistry beanRegistry = new DefaultSingletonBeanRegistry();
-
+	void singletons() {
 		TestBean tb = new TestBean();
 		beanRegistry.registerSingleton("tb", tb);
 		assertThat(beanRegistry.getSingleton("tb")).isSameAs(tb);
 
-		TestBean tb2 = (TestBean) beanRegistry.getSingleton("tb2", () -> new TestBean());
+		TestBean tb2 = (TestBean) beanRegistry.getSingleton("tb2", TestBean::new);
 		assertThat(beanRegistry.getSingleton("tb2")).isSameAs(tb2);
 
 		assertThat(beanRegistry.getSingleton("tb")).isSameAs(tb);
 		assertThat(beanRegistry.getSingleton("tb2")).isSameAs(tb2);
 		assertThat(beanRegistry.getSingletonCount()).isEqualTo(2);
-		String[] names = beanRegistry.getSingletonNames();
-		assertThat(names.length).isEqualTo(2);
-		assertThat(names[0]).isEqualTo("tb");
-		assertThat(names[1]).isEqualTo("tb2");
+		assertThat(beanRegistry.getSingletonNames()).containsExactly("tb", "tb2");
 
 		beanRegistry.destroySingletons();
-		assertThat(beanRegistry.getSingletonCount()).isEqualTo(0);
-		assertThat(beanRegistry.getSingletonNames().length).isEqualTo(0);
+		assertThat(beanRegistry.getSingletonCount()).isZero();
+		assertThat(beanRegistry.getSingletonNames()).isEmpty();
 	}
 
 	@Test
-	public void testDisposableBean() {
-		DefaultSingletonBeanRegistry beanRegistry = new DefaultSingletonBeanRegistry();
-
+	void disposableBean() {
 		DerivedTestBean tb = new DerivedTestBean();
 		beanRegistry.registerSingleton("tb", tb);
 		beanRegistry.registerDisposableBean("tb", tb);
@@ -65,21 +61,16 @@ public class DefaultSingletonBeanRegistryTests {
 
 		assertThat(beanRegistry.getSingleton("tb")).isSameAs(tb);
 		assertThat(beanRegistry.getSingletonCount()).isEqualTo(1);
-		String[] names = beanRegistry.getSingletonNames();
-		assertThat(names.length).isEqualTo(1);
-		assertThat(names[0]).isEqualTo("tb");
+		assertThat(beanRegistry.getSingletonNames()).containsExactly("tb");
 		assertThat(tb.wasDestroyed()).isFalse();
 
 		beanRegistry.destroySingletons();
-		assertThat(beanRegistry.getSingletonCount()).isEqualTo(0);
-		assertThat(beanRegistry.getSingletonNames().length).isEqualTo(0);
-		assertThat(tb.wasDestroyed()).isTrue();
+		assertThat(beanRegistry.getSingletonCount()).isZero();
+		assertThat(beanRegistry.getSingletonNames()).isEmpty();
 	}
 
 	@Test
-	public void testDependentRegistration() {
-		DefaultSingletonBeanRegistry beanRegistry = new DefaultSingletonBeanRegistry();
-
+	void dependentRegistration() {
 		beanRegistry.registerDependentBean("a", "b");
 		beanRegistry.registerDependentBean("b", "c");
 		beanRegistry.registerDependentBean("c", "b");

spring-beans/src/test/resources/org/springframework/beans/factory/FactoryBeanTests-withAutowiring.xml

@@ -4,25 +4,27 @@
 <beans default-lazy-init="true">
 
 	<bean name="beta" class="org.springframework.beans.factory.FactoryBeanTests$Beta" autowire="byType">
-        <property name="name" value="${myName}"/>
+		<property name="name" value="${myName}"/>
 	</bean>
 
 	<bean id="alpha" class="org.springframework.beans.factory.FactoryBeanTests$Alpha" autowire="byType"/>
 
 	<bean id="gamma" class="org.springframework.beans.factory.FactoryBeanTests$Gamma"/>
 
-  <bean id="betaFactory" class="org.springframework.beans.factory.FactoryBeanTests$BetaFactoryBean" autowire="constructor">
-    <property name="beta" ref="beta"/>
-  </bean>
+	<bean id="betaFactory" class="org.springframework.beans.factory.FactoryBeanTests$BetaFactoryBean" autowire="constructor">
+    	<property name="beta" ref="beta"/>
+	</bean>
 
-  <bean id="gammaFactory" factory-bean="betaFactory" factory-method="getGamma"/>
+	<bean id="gammaFactory" factory-bean="${gammaFactory}" factory-method="${gamma}"/>
 
-  <bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
-    <property name="properties">
-      <props>
-        <prop key="myName">yourName</prop>
-      </props>
-    </property>
-  </bean>
+	<bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
+		<property name="properties">
+			<props>
+				<prop key="myName">yourName</prop>
+				<prop key="gammaFactory">betaFactory</prop>
+				<prop key="gamma">getGamma</prop>
+			</props>
+		</property>
+	</bean>
 
 </beans>

spring-beans/src/testFixtures/java/org/springframework/beans/testfixture/beans/TestBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -477,7 +477,7 @@ public class TestBean implements BeanNameAware, BeanFactoryAware, ITestBean, IOt
 
 	@Override
 	public int hashCode() {
-		return this.age;
+		return TestBean.class.hashCode();
 	}
 
 	@Override

spring-context-support/src/main/java/org/springframework/cache/caffeine/CaffeineCache.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -59,8 +59,8 @@ public class CaffeineCache extends AbstractValueAdaptingCache {
 	 * given internal {@link com.github.benmanes.caffeine.cache.Cache} to use.
 	 * @param name the name of the cache
 	 * @param cache the backing Caffeine Cache instance
-	 * @param allowNullValues whether to accept and convert {@code null}
-	 * values for this cache
+	 * @param allowNullValues whether to accept and convert {@code null} values
+	 * for this cache
 	 */
 	public CaffeineCache(String name, com.github.benmanes.caffeine.cache.Cache<Object, Object> cache,
 			boolean allowNullValues) {
@@ -86,7 +86,7 @@ public class CaffeineCache extends AbstractValueAdaptingCache {
 	@SuppressWarnings("unchecked")
 	@Override
 	@Nullable
-	public <T> T get(Object key, final Callable<T> valueLoader) {
+	public <T> T get(Object key, Callable<T> valueLoader) {
 		return (T) fromStoreValue(this.cache.get(key, new LoadFunction(valueLoader)));
 	}
 
@@ -106,7 +106,7 @@ public class CaffeineCache extends AbstractValueAdaptingCache {
 
 	@Override
 	@Nullable
-	public ValueWrapper putIfAbsent(Object key, @Nullable final Object value) {
+	public ValueWrapper putIfAbsent(Object key, @Nullable Object value) {
 		PutIfAbsentFunction callable = new PutIfAbsentFunction(value);
 		Object result = this.cache.get(key, callable);
 		return (callable.called ? null : toValueWrapper(result));
@@ -140,7 +140,7 @@ public class CaffeineCache extends AbstractValueAdaptingCache {
 		@Nullable
 		private final Object value;
 
-		private boolean called;
+		boolean called;
 
 		public PutIfAbsentFunction(@Nullable Object value) {
 			this.value = value;
@@ -159,16 +159,17 @@ public class CaffeineCache extends AbstractValueAdaptingCache {
 		private final Callable<?> valueLoader;
 
 		public LoadFunction(Callable<?> valueLoader) {
+			Assert.notNull(valueLoader, "Callable must not be null");
 			this.valueLoader = valueLoader;
 		}
 
 		@Override
-		public Object apply(Object o) {
+		public Object apply(Object key) {
 			try {
 				return toStoreValue(this.valueLoader.call());
 			}
 			catch (Exception ex) {
-				throw new ValueRetrievalException(o, this.valueLoader, ex);
+				throw new ValueRetrievalException(key, this.valueLoader, ex);
 			}
 		}
 	}

spring-context-support/src/main/java/org/springframework/cache/caffeine/CaffeineCacheManager.java

@@ -110,7 +110,7 @@ public class CaffeineCacheManager implements CacheManager {
 	 * Set the Caffeine to use for building each individual
 	 * {@link CaffeineCache} instance.
 	 * @see #createNativeCaffeineCache
-	 * @see com.github.benmanes.caffeine.cache.Caffeine#build()
+	 * @see Caffeine#build()
 	 */
 	public void setCaffeine(Caffeine<Object, Object> caffeine) {
 		Assert.notNull(caffeine, "Caffeine must not be null");
@@ -121,7 +121,7 @@ public class CaffeineCacheManager implements CacheManager {
 	 * Set the {@link CaffeineSpec} to use for building each individual
 	 * {@link CaffeineCache} instance.
 	 * @see #createNativeCaffeineCache
-	 * @see com.github.benmanes.caffeine.cache.Caffeine#from(CaffeineSpec)
+	 * @see Caffeine#from(CaffeineSpec)
 	 */
 	public void setCaffeineSpec(CaffeineSpec caffeineSpec) {
 		doSetCaffeine(Caffeine.from(caffeineSpec));
@@ -132,7 +132,7 @@ public class CaffeineCacheManager implements CacheManager {
 	 * individual {@link CaffeineCache} instance. The given value needs to
 	 * comply with Caffeine's {@link CaffeineSpec} (see its javadoc).
 	 * @see #createNativeCaffeineCache
-	 * @see com.github.benmanes.caffeine.cache.Caffeine#from(String)
+	 * @see Caffeine#from(String)
 	 */
 	public void setCacheSpecification(String cacheSpecification) {
 		doSetCaffeine(Caffeine.from(cacheSpecification));
@@ -149,7 +149,7 @@ public class CaffeineCacheManager implements CacheManager {
 	 * Set the Caffeine CacheLoader to use for building each individual
 	 * {@link CaffeineCache} instance, turning it into a LoadingCache.
 	 * @see #createNativeCaffeineCache
-	 * @see com.github.benmanes.caffeine.cache.Caffeine#build(CacheLoader)
+	 * @see Caffeine#build(CacheLoader)
 	 * @see com.github.benmanes.caffeine.cache.LoadingCache
 	 */
 	public void setCacheLoader(CacheLoader<Object, Object> cacheLoader) {
@@ -189,13 +189,11 @@ public class CaffeineCacheManager implements CacheManager {
 	@Override
 	@Nullable
 	public Cache getCache(String name) {
-		if (this.dynamic) {
-			Cache cache = this.cacheMap.get(name);
-			return (cache != null) ? cache : this.cacheMap.computeIfAbsent(name, this::createCaffeineCache);
-		}
-		else {
-			return this.cacheMap.get(name);
+		Cache cache = this.cacheMap.get(name);
+		if (cache == null && this.dynamic) {
+			cache = this.cacheMap.computeIfAbsent(name, this::createCaffeineCache);
 		}
+		return cache;
 	}
 
 

spring-context-support/src/test/java/org/springframework/cache/caffeine/CaffeineCacheManagerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,19 +38,17 @@ public class CaffeineCacheManagerTests {
 	@Test
 	public void testDynamicMode() {
 		CacheManager cm = new CaffeineCacheManager();
+
 		Cache cache1 = cm.getCache("c1");
-		boolean condition2 = cache1 instanceof CaffeineCache;
-		assertThat(condition2).isTrue();
+		assertThat(cache1).isInstanceOf(CaffeineCache.class);
 		Cache cache1again = cm.getCache("c1");
 		assertThat(cache1).isSameAs(cache1again);
 		Cache cache2 = cm.getCache("c2");
-		boolean condition1 = cache2 instanceof CaffeineCache;
-		assertThat(condition1).isTrue();
+		assertThat(cache2).isInstanceOf(CaffeineCache.class);
 		Cache cache2again = cm.getCache("c2");
 		assertThat(cache2).isSameAs(cache2again);
 		Cache cache3 = cm.getCache("c3");
-		boolean condition = cache3 instanceof CaffeineCache;
-		assertThat(condition).isTrue();
+		assertThat(cache3).isInstanceOf(CaffeineCache.class);
 		Cache cache3again = cm.getCache("c3");
 		assertThat(cache3).isSameAs(cache3again);
 
@@ -62,19 +60,23 @@ public class CaffeineCacheManagerTests {
 		assertThat(cache1.get("key3").get()).isNull();
 		cache1.evict("key3");
 		assertThat(cache1.get("key3")).isNull();
+		assertThat(cache1.get("key3", () -> "value3")).isEqualTo("value3");
+		assertThat(cache1.get("key3", () -> "value3")).isEqualTo("value3");
+		cache1.evict("key3");
+		assertThat(cache1.get("key3", () -> (String) null)).isNull();
+		assertThat(cache1.get("key3", () -> (String) null)).isNull();
 	}
 
 	@Test
 	public void testStaticMode() {
 		CaffeineCacheManager cm = new CaffeineCacheManager("c1", "c2");
+
 		Cache cache1 = cm.getCache("c1");
-		boolean condition3 = cache1 instanceof CaffeineCache;
-		assertThat(condition3).isTrue();
+		assertThat(cache1).isInstanceOf(CaffeineCache.class);
 		Cache cache1again = cm.getCache("c1");
 		assertThat(cache1).isSameAs(cache1again);
 		Cache cache2 = cm.getCache("c2");
-		boolean condition2 = cache2 instanceof CaffeineCache;
-		assertThat(condition2).isTrue();
+		assertThat(cache2).isInstanceOf(CaffeineCache.class);
 		Cache cache2again = cm.getCache("c2");
 		assertThat(cache2).isSameAs(cache2again);
 		Cache cache3 = cm.getCache("c3");
@@ -91,13 +93,11 @@ public class CaffeineCacheManagerTests {
 
 		cm.setAllowNullValues(false);
 		Cache cache1x = cm.getCache("c1");
-		boolean condition1 = cache1x instanceof CaffeineCache;
-		assertThat(condition1).isTrue();
-		assertThat(cache1x != cache1).isTrue();
+		assertThat(cache1x).isInstanceOf(CaffeineCache.class);
+		assertThat(cache1x).isNotSameAs(cache1);
 		Cache cache2x = cm.getCache("c2");
-		boolean condition = cache2x instanceof CaffeineCache;
-		assertThat(condition).isTrue();
-		assertThat(cache2x != cache2).isTrue();
+		assertThat(cache2x).isInstanceOf(CaffeineCache.class);
+		assertThat(cache2x).isNotSameAs(cache2);
 		Cache cache3x = cm.getCache("c3");
 		assertThat(cache3x).isNull();
 
@@ -190,7 +190,7 @@ public class CaffeineCacheManagerTests {
 		assertThat(value.get()).isEqualTo("pong");
 
 		assertThatIllegalArgumentException().isThrownBy(() -> assertThat(cache1.get("foo")).isNull())
-			.withMessageContaining("I only know ping");
+				.withMessageContaining("I only know ping");
 	}
 
 	@Test

spring-context-support/src/test/java/org/springframework/scheduling/quartz/QuartzSupportTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -114,7 +114,7 @@ class QuartzSupportTests {
 		trigger.setName("myTrigger");
 		trigger.setJobDetail(jobDetail);
 		trigger.setStartDelay(1);
-		trigger.setRepeatInterval(500);
+		trigger.setRepeatInterval(100);
 		trigger.setRepeatCount(1);
 		trigger.afterPropertiesSet();
 
@@ -126,14 +126,14 @@ class QuartzSupportTests {
 		bean.start();
 
 		Thread.sleep(500);
-		assertThat(DummyJob.count > 0).as("DummyJob should have been executed at least once.").isTrue();
+		assertThat(DummyJob.count).as("DummyJob should have been executed at least once.").isGreaterThan(0);
 		assertThat(taskExecutor.count).isEqualTo(DummyJob.count);
 
 		bean.destroy();
 	}
 
 	@Test
-	@SuppressWarnings({ "unchecked", "rawtypes" })
+	@SuppressWarnings({"unchecked", "rawtypes"})
 	void jobDetailWithRunnableInsteadOfJob() {
 		JobDetailImpl jobDetail = new JobDetailImpl();
 		assertThatIllegalArgumentException().isThrownBy(() ->
@@ -156,7 +156,7 @@ class QuartzSupportTests {
 		trigger.setName("myTrigger");
 		trigger.setJobDetail(jobDetail);
 		trigger.setStartDelay(1);
-		trigger.setRepeatInterval(500);
+		trigger.setRepeatInterval(100);
 		trigger.setRepeatCount(1);
 		trigger.afterPropertiesSet();
 
@@ -168,7 +168,7 @@ class QuartzSupportTests {
 
 		Thread.sleep(500);
 		assertThat(DummyJobBean.param).isEqualTo(10);
-		assertThat(DummyJobBean.count > 0).isTrue();
+		assertThat(DummyJobBean.count).isGreaterThan(0);
 
 		bean.destroy();
 	}
@@ -190,7 +190,7 @@ class QuartzSupportTests {
 		trigger.setName("myTrigger");
 		trigger.setJobDetail(jobDetail);
 		trigger.setStartDelay(1);
-		trigger.setRepeatInterval(500);
+		trigger.setRepeatInterval(100);
 		trigger.setRepeatCount(1);
 		trigger.afterPropertiesSet();
 
@@ -203,7 +203,7 @@ class QuartzSupportTests {
 
 		Thread.sleep(500);
 		assertThat(DummyJob.param).isEqualTo(10);
-		assertThat(DummyJob.count > 0).as("DummyJob should have been executed at least once.").isTrue();
+		assertThat(DummyJob.count).as("DummyJob should have been executed at least once.").isGreaterThan(0);
 
 		bean.destroy();
 	}
@@ -225,7 +225,7 @@ class QuartzSupportTests {
 		trigger.setName("myTrigger");
 		trigger.setJobDetail(jobDetail);
 		trigger.setStartDelay(1);
-		trigger.setRepeatInterval(500);
+		trigger.setRepeatInterval(100);
 		trigger.setRepeatCount(1);
 		trigger.afterPropertiesSet();
 
@@ -239,7 +239,7 @@ class QuartzSupportTests {
 
 		Thread.sleep(500);
 		assertThat(DummyJob.param).isEqualTo(0);
-		assertThat(DummyJob.count == 0).isTrue();
+		assertThat(DummyJob.count).isEqualTo(0);
 
 		bean.destroy();
 	}
@@ -260,7 +260,7 @@ class QuartzSupportTests {
 		trigger.setName("myTrigger");
 		trigger.setJobDetail(jobDetail);
 		trigger.setStartDelay(1);
-		trigger.setRepeatInterval(500);
+		trigger.setRepeatInterval(100);
 		trigger.setRepeatCount(1);
 		trigger.afterPropertiesSet();
 
@@ -273,7 +273,7 @@ class QuartzSupportTests {
 
 		Thread.sleep(500);
 		assertThat(DummyJobBean.param).isEqualTo(10);
-		assertThat(DummyJobBean.count > 0).isTrue();
+		assertThat(DummyJobBean.count).isGreaterThan(0);
 
 		bean.destroy();
 	}
@@ -292,7 +292,7 @@ class QuartzSupportTests {
 
 		Thread.sleep(500);
 		assertThat(DummyJob.param).isEqualTo(10);
-		assertThat(DummyJob.count > 0).as("DummyJob should have been executed at least once.").isTrue();
+		assertThat(DummyJob.count).as("DummyJob should have been executed at least once.").isGreaterThan(0);
 
 		bean.destroy();
 	}

spring-context/src/main/java/org/springframework/cache/Cache.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,14 +23,20 @@ import org.springframework.lang.Nullable;
 /**
  * Interface that defines common cache operations.
  *
- * <b>Note:</b> Due to the generic use of caching, it is recommended that
- * implementations allow storage of {@code null} values (for example to
- * cache methods that return {@code null}).
+ * <p>Serves as an SPI for Spring's annotation-based caching model
+ * ({@link org.springframework.cache.annotation.Cacheable} and co)
+ * as well as an API for direct usage in applications.
+ *
+ * <p><b>Note:</b> Due to the generic use of caching, it is recommended
+ * that implementations allow storage of {@code null} values
+ * (for example to cache methods that return {@code null}).
  *
  * @author Costin Leau
  * @author Juergen Hoeller
  * @author Stephane Nicoll
  * @since 3.1
+ * @see CacheManager
+ * @see org.springframework.cache.annotation.Cacheable
  */
 public interface Cache {
 

spring-context/src/main/java/org/springframework/cache/annotation/Cacheable.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -175,9 +175,9 @@ public @interface Cacheable {
 	 * <li>Only one cache may be specified</li>
 	 * <li>No other cache-related operation can be combined</li>
 	 * </ol>
-	 * This is effectively a hint and the actual cache provider that you are
-	 * using may not support it in a synchronized fashion. Check your provider
-	 * documentation for more details on the actual semantics.
+	 * This is effectively a hint and the chosen cache provider might not actually
+	 * support it in a synchronized fashion. Check your provider documentation for
+	 * more details on the actual semantics.
 	 * @since 4.3
 	 * @see org.springframework.cache.Cache#get(Object, Callable)
 	 */

spring-context/src/main/java/org/springframework/cache/concurrent/ConcurrentMapCacheManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -166,13 +166,7 @@ public class ConcurrentMapCacheManager implements CacheManager, BeanClassLoaderA
 	public Cache getCache(String name) {
 		Cache cache = this.cacheMap.get(name);
 		if (cache == null && this.dynamic) {
-			synchronized (this.cacheMap) {
-				cache = this.cacheMap.get(name);
-				if (cache == null) {
-					cache = createConcurrentMapCache(name);
-					this.cacheMap.put(name, cache);
-				}
-			}
+			cache = this.cacheMap.computeIfAbsent(name, this::createConcurrentMapCache);
 		}
 		return cache;
 	}

spring-context/src/main/java/org/springframework/cache/interceptor/AbstractCacheInvoker.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -82,12 +82,12 @@ public abstract class AbstractCacheInvoker {
 	 * Execute {@link Cache#put(Object, Object)} on the specified {@link Cache}
 	 * and invoke the error handler if an exception occurs.
 	 */
-	protected void doPut(Cache cache, Object key, @Nullable Object result) {
+	protected void doPut(Cache cache, Object key, @Nullable Object value) {
 		try {
-			cache.put(key, result);
+			cache.put(key, value);
 		}
 		catch (RuntimeException ex) {
-			getErrorHandler().handleCachePutError(ex, cache, key, result);
+			getErrorHandler().handleCachePutError(ex, cache, key, value);
 		}
 	}
 

spring-context/src/main/java/org/springframework/cache/interceptor/CacheAspectSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -214,7 +214,7 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 	@Override
 	public void afterSingletonsInstantiated() {
 		if (getCacheResolver() == null) {
-			// Lazily initialize cache resolver via default cache manager...
+			// Lazily initialize cache resolver via default cache manager
 			Assert.state(this.beanFactory != null, "CacheResolver or BeanFactory must be set on cache aspect");
 			try {
 				setCacheManager(this.beanFactory.getBean(CacheManager.class));
@@ -307,22 +307,22 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 	}
 
 	/**
-	 * Return a bean with the specified name and type. Used to resolve services that
-	 * are referenced by name in a {@link CacheOperation}.
-	 * @param beanName the name of the bean, as defined by the operation
-	 * @param expectedType type for the bean
-	 * @return the bean matching that name
+	 * Retrieve a bean with the specified name and type.
+	 * Used to resolve services that are referenced by name in a {@link CacheOperation}.
+	 * @param name the name of the bean, as defined by the cache operation
+	 * @param serviceType the type expected by the operation's service reference
+	 * @return the bean matching the expected type, qualified by the given name
 	 * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException if such bean does not exist
 	 * @see CacheOperation#getKeyGenerator()
 	 * @see CacheOperation#getCacheManager()
 	 * @see CacheOperation#getCacheResolver()
 	 */
-	protected <T> T getBean(String beanName, Class<T> expectedType) {
+	protected <T> T getBean(String name, Class<T> serviceType) {
 		if (this.beanFactory == null) {
 			throw new IllegalStateException(
-					"BeanFactory must be set on cache aspect for " + expectedType.getSimpleName() + " retrieval");
+					"BeanFactory must be set on cache aspect for " + serviceType.getSimpleName() + " retrieval");
 		}
-		return BeanFactoryAnnotationUtils.qualifiedBeanOfType(this.beanFactory, expectedType, beanName);
+		return BeanFactoryAnnotationUtils.qualifiedBeanOfType(this.beanFactory, serviceType, name);
 	}
 
 	/**
@@ -388,21 +388,20 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 				}
 			}
 			else {
-				// No caching required, only call the underlying method
+				// No caching required, just call the underlying method
 				return invokeOperation(invoker);
 			}
 		}
 
-
 		// Process any early evictions
 		processCacheEvicts(contexts.get(CacheEvictOperation.class), true,
 				CacheOperationExpressionEvaluator.NO_RESULT);
 
-		// Check if we have a cached item matching the conditions
+		// Check if we have a cached value matching the conditions
 		Cache.ValueWrapper cacheHit = findCachedItem(contexts.get(CacheableOperation.class));
 
-		// Collect puts from any @Cacheable miss, if no cached item is found
-		List<CachePutRequest> cachePutRequests = new ArrayList<>();
+		// Collect puts from any @Cacheable miss, if no cached value is found
+		List<CachePutRequest> cachePutRequests = new ArrayList<>(1);
 		if (cacheHit == null) {
 			collectPutRequests(contexts.get(CacheableOperation.class),
 					CacheOperationExpressionEvaluator.NO_RESULT, cachePutRequests);
@@ -469,7 +468,7 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 	private boolean hasCachePut(CacheOperationContexts contexts) {
 		// Evaluate the conditions *without* the result object because we don't have it yet...
 		Collection<CacheOperationContext> cachePutContexts = contexts.get(CachePutOperation.class);
-		Collection<CacheOperationContext> excluded = new ArrayList<>();
+		Collection<CacheOperationContext> excluded = new ArrayList<>(1);
 		for (CacheOperationContext context : cachePutContexts) {
 			try {
 				if (!context.isConditionPassing(CacheOperationExpressionEvaluator.RESULT_UNAVAILABLE)) {
@@ -522,9 +521,9 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 	}
 
 	/**
-	 * Find a cached item only for {@link CacheableOperation} that passes the condition.
+	 * Find a cached value only for {@link CacheableOperation} that passes the condition.
 	 * @param contexts the cacheable operations
-	 * @return a {@link Cache.ValueWrapper} holding the cached item,
+	 * @return a {@link Cache.ValueWrapper} holding the cached value,
 	 * or {@code null} if none is found
 	 */
 	@Nullable
@@ -549,9 +548,9 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 
 	/**
 	 * Collect the {@link CachePutRequest} for all {@link CacheOperation} using
-	 * the specified result item.
+	 * the specified result value.
 	 * @param contexts the contexts to handle
-	 * @param result the result item (never {@code null})
+	 * @param result the result value (never {@code null})
 	 * @param putRequests the collection to update
 	 */
 	private void collectPutRequests(Collection<CacheOperationContext> contexts,
@@ -641,21 +640,22 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 			if (syncEnabled) {
 				if (this.contexts.size() > 1) {
 					throw new IllegalStateException(
-							"@Cacheable(sync=true) cannot be combined with other cache operations on '" + method + "'");
+							"A sync=true operation cannot be combined with other cache operations on '" + method + "'");
 				}
 				if (cacheOperationContexts.size() > 1) {
 					throw new IllegalStateException(
-							"Only one @Cacheable(sync=true) entry is allowed on '" + method + "'");
+							"Only one sync=true operation is allowed on '" + method + "'");
 				}
 				CacheOperationContext cacheOperationContext = cacheOperationContexts.iterator().next();
-				CacheableOperation operation = (CacheableOperation) cacheOperationContext.getOperation();
+				CacheOperation operation = cacheOperationContext.getOperation();
 				if (cacheOperationContext.getCaches().size() > 1) {
 					throw new IllegalStateException(
-							"@Cacheable(sync=true) only allows a single cache on '" + operation + "'");
+							"A sync=true operation is restricted to a single cache on '" + operation + "'");
 				}
-				if (StringUtils.hasText(operation.getUnless())) {
+				if (operation instanceof CacheableOperation &&
+						StringUtils.hasText(((CacheableOperation) operation).getUnless())) {
 					throw new IllegalStateException(
-							"@Cacheable(sync=true) does not support unless attribute on '" + operation + "'");
+							"A sync=true operation does not support the unless attribute on '" + operation + "'");
 				}
 				return true;
 			}
@@ -722,7 +722,7 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 			this.args = extractArgs(metadata.method, args);
 			this.target = target;
 			this.caches = CacheAspectSupport.this.getCaches(this, metadata.cacheResolver);
-			this.cacheNames = createCacheNames(this.caches);
+			this.cacheNames = prepareCacheNames(this.caches);
 		}
 
 		@Override
@@ -810,8 +810,8 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 			return this.cacheNames;
 		}
 
-		private Collection<String> createCacheNames(Collection<? extends Cache> caches) {
-			Collection<String> names = new ArrayList<>();
+		private Collection<String> prepareCacheNames(Collection<? extends Cache> caches) {
+			Collection<String> names = new ArrayList<>(caches.size());
 			for (Cache cache : caches) {
 				names.add(cache.getName());
 			}
@@ -885,13 +885,13 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 		}
 	}
 
+
 	/**
 	 * Internal holder class for recording that a cache method was invoked.
 	 */
 	private static class InvocationAwareResult {
 
 		boolean invoked;
-
 	}
 
 }

spring-context/src/main/java/org/springframework/cache/interceptor/NameMatchCacheOperationSource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ public class NameMatchCacheOperationSource implements CacheOperationSource, Seri
 
 
 	/** Keys are method names; values are TransactionAttributes. */
-	private Map<String, Collection<CacheOperation>> nameMap = new LinkedHashMap<>();
+	private final Map<String, Collection<CacheOperation>> nameMap = new LinkedHashMap<>();
 
 
 	/**
@@ -117,8 +117,8 @@ public class NameMatchCacheOperationSource implements CacheOperationSource, Seri
 		if (!(other instanceof NameMatchCacheOperationSource)) {
 			return false;
 		}
-		NameMatchCacheOperationSource otherTas = (NameMatchCacheOperationSource) other;
-		return ObjectUtils.nullSafeEquals(this.nameMap, otherTas.nameMap);
+		NameMatchCacheOperationSource otherCos = (NameMatchCacheOperationSource) other;
+		return ObjectUtils.nullSafeEquals(this.nameMap, otherCos.nameMap);
 	}
 
 	@Override
@@ -130,4 +130,5 @@ public class NameMatchCacheOperationSource implements CacheOperationSource, Seri
 	public String toString() {
 		return getClass().getName() + ": " + this.nameMap;
 	}
+
 }

spring-context/src/main/java/org/springframework/cache/support/SimpleCacheManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,14 +24,16 @@ import org.springframework.cache.Cache;
 /**
  * Simple cache manager working against a given collection of caches.
  * Useful for testing or simple caching declarations.
- * <p>
- * When using this implementation directly, i.e. not via a regular
+ *
+ * <p>When using this implementation directly, i.e. not via a regular
  * bean registration, {@link #initializeCaches()} should be invoked
  * to initialize its internal state once the
  * {@linkplain #setCaches(Collection) caches have been provided}.
  *
  * @author Costin Leau
  * @since 3.1
+ * @see NoOpCache
+ * @see org.springframework.cache.concurrent.ConcurrentMapCache
  */
 public class SimpleCacheManager extends AbstractCacheManager {
 

spring-context/src/main/java/org/springframework/context/annotation/AnnotationConfigApplicationContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -65,7 +65,7 @@ public class AnnotationConfigApplicationContext extends GenericApplicationContex
 	 * through {@link #register} calls and then manually {@linkplain #refresh refreshed}.
 	 */
 	public AnnotationConfigApplicationContext() {
-		StartupStep createAnnotatedBeanDefReader = this.getApplicationStartup().start("spring.context.annotated-bean-reader.create");
+		StartupStep createAnnotatedBeanDefReader = getApplicationStartup().start("spring.context.annotated-bean-reader.create");
 		this.reader = new AnnotatedBeanDefinitionReader(this);
 		createAnnotatedBeanDefReader.end();
 		this.scanner = new ClassPathBeanDefinitionScanner(this);
@@ -163,7 +163,7 @@ public class AnnotationConfigApplicationContext extends GenericApplicationContex
 	@Override
 	public void register(Class<?>... componentClasses) {
 		Assert.notEmpty(componentClasses, "At least one component class must be specified");
-		StartupStep registerComponentClass = this.getApplicationStartup().start("spring.context.component-classes.register")
+		StartupStep registerComponentClass = getApplicationStartup().start("spring.context.component-classes.register")
 				.tag("classes", () -> Arrays.toString(componentClasses));
 		this.reader.register(componentClasses);
 		registerComponentClass.end();
@@ -180,7 +180,7 @@ public class AnnotationConfigApplicationContext extends GenericApplicationContex
 	@Override
 	public void scan(String... basePackages) {
 		Assert.notEmpty(basePackages, "At least one base package must be specified");
-		StartupStep scanPackages = this.getApplicationStartup().start("spring.context.base-packages.scan")
+		StartupStep scanPackages = getApplicationStartup().start("spring.context.base-packages.scan")
 				.tag("packages", () -> Arrays.toString(basePackages));
 		this.scanner.scan(basePackages);
 		scanPackages.end();

spring-context/src/main/java/org/springframework/context/annotation/BeanMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -39,6 +39,7 @@ final class BeanMethod extends ConfigurationMethod {
 		super(metadata, configurationClass);
 	}
 
+
 	@Override
 	public void validate(ProblemReporter problemReporter) {
 		if (getMetadata().isStatic()) {
@@ -55,9 +56,9 @@ final class BeanMethod extends ConfigurationMethod {
 	}
 
 	@Override
-	public boolean equals(@Nullable Object obj) {
-		return ((this == obj) || ((obj instanceof BeanMethod) &&
-				this.metadata.equals(((BeanMethod) obj).metadata)));
+	public boolean equals(@Nullable Object other) {
+		return (this == other || (other instanceof BeanMethod &&
+				this.metadata.equals(((BeanMethod) other).metadata)));
 	}
 
 	@Override
@@ -70,6 +71,7 @@ final class BeanMethod extends ConfigurationMethod {
 		return "BeanMethod: " + this.metadata;
 	}
 
+
 	private class NonOverridableMethodError extends Problem {
 
 		NonOverridableMethodError() {

spring-context/src/main/java/org/springframework/context/annotation/ClassPathBeanDefinitionScanner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -329,8 +329,8 @@ public class ClassPathBeanDefinitionScanner extends ClassPathScanningCandidateCo
 	 * @return {@code true} if the bean can be registered as-is;
 	 * {@code false} if it should be skipped because there is an
 	 * existing, compatible bean definition for the specified name
-	 * @throws ConflictingBeanDefinitionException if an existing, incompatible
-	 * bean definition has been found for the specified name
+	 * @throws IllegalStateException if an existing, incompatible bean definition
+	 * has been found for the specified name
 	 */
 	protected boolean checkCandidate(String beanName, BeanDefinition beanDefinition) throws IllegalStateException {
 		if (!this.registry.containsBeanDefinition(beanName)) {
@@ -354,16 +354,16 @@ public class ClassPathBeanDefinitionScanner extends ClassPathScanningCandidateCo
 	 * the given existing bean definition.
 	 * <p>The default implementation considers them as compatible when the existing
 	 * bean definition comes from the same source or from a non-scanning source.
-	 * @param newDefinition the new bean definition, originated from scanning
-	 * @param existingDefinition the existing bean definition, potentially an
+	 * @param newDef the new bean definition, originated from scanning
+	 * @param existingDef the existing bean definition, potentially an
 	 * explicitly defined one or a previously generated one from scanning
 	 * @return whether the definitions are considered as compatible, with the
 	 * new definition to be skipped in favor of the existing definition
 	 */
-	protected boolean isCompatible(BeanDefinition newDefinition, BeanDefinition existingDefinition) {
-		return (!(existingDefinition instanceof ScannedGenericBeanDefinition) ||  // explicitly registered overriding bean
-				(newDefinition.getSource() != null && newDefinition.getSource().equals(existingDefinition.getSource())) ||  // scanned same file twice
-				newDefinition.equals(existingDefinition));  // scanned equivalent class twice
+	protected boolean isCompatible(BeanDefinition newDef, BeanDefinition existingDef) {
+		return (!(existingDef instanceof ScannedGenericBeanDefinition) ||  // explicitly registered overriding bean
+				(newDef.getSource() != null && newDef.getSource().equals(existingDef.getSource())) ||  // scanned same file twice
+				newDef.equals(existingDef));  // scanned equivalent class twice
 	}
 
 

spring-context/src/main/java/org/springframework/context/annotation/Configuration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -104,8 +104,8 @@ import org.springframework.stereotype.Component;
  *
  * }</pre>
  *
- * <p>{@code @Configuration} classes may not only be bootstrapped using
- * component scanning, but may also themselves <em>configure</em> component scanning using
+ * <p>{@code @Configuration} classes may not only be bootstrapped using component
+ * scanning, but may also themselves <em>configure</em> component scanning using
  * the {@link ComponentScan @ComponentScan} annotation:
  *
  * <pre class="code">

spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassBeanDefinitionReader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -424,6 +424,7 @@ class ConfigurationClassBeanDefinitionReader {
 
 		public ConfigurationClassBeanDefinition(RootBeanDefinition original,
 				ConfigurationClass configClass, MethodMetadata beanMethodMetadata, String derivedBeanName) {
+
 			super(original);
 			this.annotationMetadata = configClass.getMetadata();
 			this.factoryMethodMetadata = beanMethodMetadata;

spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -409,11 +409,14 @@ class ConfigurationClassParser {
 						this.metadataReaderFactory.getMetadataReader(original.getClassName()).getAnnotationMetadata();
 				Set<MethodMetadata> asmMethods = asm.getAnnotatedMethods(Bean.class.getName());
 				if (asmMethods.size() >= beanMethods.size()) {
+					Set<MethodMetadata> candidateMethods = new LinkedHashSet<>(beanMethods);
 					Set<MethodMetadata> selectedMethods = new LinkedHashSet<>(asmMethods.size());
 					for (MethodMetadata asmMethod : asmMethods) {
-						for (MethodMetadata beanMethod : beanMethods) {
+						for (Iterator<MethodMetadata> it = candidateMethods.iterator(); it.hasNext();) {
+							MethodMetadata beanMethod = it.next();
 							if (beanMethod.getMethodName().equals(asmMethod.getMethodName())) {
 								selectedMethods.add(beanMethod);
+								it.remove();
 								break;
 							}
 						}

spring-context/src/main/java/org/springframework/context/annotation/LoadTimeWeavingConfigurer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,8 +21,8 @@ import org.springframework.instrument.classloading.LoadTimeWeaver;
 /**
  * Interface to be implemented by
  * {@link org.springframework.context.annotation.Configuration @Configuration}
- * classes annotated with {@link EnableLoadTimeWeaving @EnableLoadTimeWeaving} that wish to
- * customize the {@link LoadTimeWeaver} instance to be used.
+ * classes annotated with {@link EnableLoadTimeWeaving @EnableLoadTimeWeaving}
+ * that wish to customize the {@link LoadTimeWeaver} instance to be used.
  *
  * <p>See {@link org.springframework.scheduling.annotation.EnableAsync @EnableAsync}
  * for usage examples and information on how a default {@code LoadTimeWeaver}
@@ -36,9 +36,9 @@ import org.springframework.instrument.classloading.LoadTimeWeaver;
 public interface LoadTimeWeavingConfigurer {
 
 	/**
-	 * Create, configure and return the {@code LoadTimeWeaver} instance to be used. Note
-	 * that it is unnecessary to annotate this method with {@code @Bean}, because the
-	 * object returned will automatically be registered as a bean by
+	 * Create, configure and return the {@code LoadTimeWeaver} instance to be used.
+	 * Note that it is unnecessary to annotate this method with {@code @Bean}
+	 * because the object returned will automatically be registered as a bean by
 	 * {@link LoadTimeWeavingConfiguration#loadTimeWeaver()}
 	 */
 	LoadTimeWeaver getLoadTimeWeaver();

spring-context/src/main/java/org/springframework/context/event/ApplicationListenerMethodAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -274,7 +274,7 @@ public class ApplicationListenerMethodAdapter implements GenericApplicationListe
 					handleAsyncError(ex);
 				}
 				else if (event != null) {
-					publishEvent(event);
+					publishEvents(event);
 				}
 			});
 		}
@@ -367,7 +367,7 @@ public class ApplicationListenerMethodAdapter implements GenericApplicationListe
 	 * Return the target bean instance to use.
 	 */
 	protected Object getTargetBean() {
-		Assert.notNull(this.applicationContext, "ApplicationContext must no be null");
+		Assert.notNull(this.applicationContext, "ApplicationContext must not be null");
 		return this.applicationContext.getBean(this.beanName);
 	}
 
@@ -468,6 +468,9 @@ public class ApplicationListenerMethodAdapter implements GenericApplicationListe
 	}
 
 
+	/**
+	 * Inner class to avoid a hard dependency on the Reactive Streams API at runtime.
+	 */
 	private class ReactiveResultHandler {
 
 		public boolean subscribeToPublisher(Object result) {
@@ -481,6 +484,9 @@ public class ApplicationListenerMethodAdapter implements GenericApplicationListe
 	}
 
 
+	/**
+	 * Reactive Streams Subscriber for publishing follow-up events.
+	 */
 	private class EventPublicationSubscriber implements Subscriber<Object> {
 
 		@Override

spring-context/src/main/java/org/springframework/context/event/SimpleApplicationEventMulticaster.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -79,10 +79,11 @@ public class SimpleApplicationEventMulticaster extends AbstractApplicationEventM
 	 * to invoke each listener with.
 	 * <p>Default is equivalent to {@link org.springframework.core.task.SyncTaskExecutor},
 	 * executing all listeners synchronously in the calling thread.
-	 * <p>Consider specifying an asynchronous task executor here to not block the
-	 * caller until all listeners have been executed. However, note that asynchronous
-	 * execution will not participate in the caller's thread context (class loader,
-	 * transaction association) unless the TaskExecutor explicitly supports this.
+	 * <p>Consider specifying an asynchronous task executor here to not block the caller
+	 * until all listeners have been executed. However, note that asynchronous execution
+	 * will not participate in the caller's thread context (class loader, transaction context)
+	 * unless the TaskExecutor explicitly supports this.
+	 * @since 2.0
 	 * @see org.springframework.core.task.SyncTaskExecutor
 	 * @see org.springframework.core.task.SimpleAsyncTaskExecutor
 	 */
@@ -92,6 +93,7 @@ public class SimpleApplicationEventMulticaster extends AbstractApplicationEventM
 
 	/**
 	 * Return the current task executor for this multicaster.
+	 * @since 2.0
 	 */
 	@Nullable
 	protected Executor getTaskExecutor() {

spring-context/src/main/java/org/springframework/context/support/AbstractApplicationContext.java

@@ -137,31 +137,39 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 		implements ConfigurableApplicationContext {
 
 	/**
-	 * Name of the MessageSource bean in the factory.
-	 * If none is supplied, message resolution is delegated to the parent.
-	 * @see MessageSource
-	 */
-	public static final String MESSAGE_SOURCE_BEAN_NAME = "messageSource";
-
-	/**
-	 * Name of the LifecycleProcessor bean in the factory.
-	 * If none is supplied, a DefaultLifecycleProcessor is used.
+	 * The name of the {@link LifecycleProcessor} bean in the context.
+	 * If none is supplied, a {@link DefaultLifecycleProcessor} is used.
+	 * @since 3.0
 	 * @see org.springframework.context.LifecycleProcessor
 	 * @see org.springframework.context.support.DefaultLifecycleProcessor
+	 * @see #start()
+	 * @see #stop()
 	 */
 	public static final String LIFECYCLE_PROCESSOR_BEAN_NAME = "lifecycleProcessor";
 
 	/**
-	 * Name of the ApplicationEventMulticaster bean in the factory.
-	 * If none is supplied, a default SimpleApplicationEventMulticaster is used.
+	 * The name of the {@link MessageSource} bean in the context.
+	 * If none is supplied, message resolution is delegated to the parent.
+	 * @see org.springframework.context.MessageSource
+	 * @see org.springframework.context.support.ResourceBundleMessageSource
+	 * @see org.springframework.context.support.ReloadableResourceBundleMessageSource
+	 * @see #getMessage(MessageSourceResolvable, Locale)
+	 */
+	public static final String MESSAGE_SOURCE_BEAN_NAME = "messageSource";
+
+	/**
+	 * The name of the {@link ApplicationEventMulticaster} bean in the context.
+	 * If none is supplied, a {@link SimpleApplicationEventMulticaster} is used.
 	 * @see org.springframework.context.event.ApplicationEventMulticaster
 	 * @see org.springframework.context.event.SimpleApplicationEventMulticaster
+	 * @see #publishEvent(ApplicationEvent)
+	 * @see #addApplicationListener(ApplicationListener)
 	 */
 	public static final String APPLICATION_EVENT_MULTICASTER_BEAN_NAME = "applicationEventMulticaster";
 
 	/**
-	 * Boolean flag controlled by a {@code spring.spel.ignore} system property that instructs Spring to
-	 * ignore SpEL, i.e. to not initialize the SpEL infrastructure.
+	 * Boolean flag controlled by a {@code spring.spel.ignore} system property that
+	 * instructs Spring to ignore SpEL, i.e. to not initialize the SpEL infrastructure.
 	 * <p>The default is "false".
 	 */
 	private static final boolean shouldIgnoreSpel = SpringProperties.getFlag("spring.spel.ignore");
@@ -211,7 +219,7 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 	private Thread shutdownHook;
 
 	/** ResourcePatternResolver used by this context. */
-	private ResourcePatternResolver resourcePatternResolver;
+	private final ResourcePatternResolver resourcePatternResolver;
 
 	/** LifecycleProcessor for managing the lifecycle of beans within this context. */
 	@Nullable
@@ -447,7 +455,7 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 
 	@Override
 	public void setApplicationStartup(ApplicationStartup applicationStartup) {
-		Assert.notNull(applicationStartup, "applicationStartup should not be null");
+		Assert.notNull(applicationStartup, "ApplicationStartup must not be null");
 		this.applicationStartup = applicationStartup;
 	}
 
@@ -749,7 +757,8 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 
 		// Detect a LoadTimeWeaver and prepare for weaving, if found in the meantime
 		// (e.g. through an @Bean method registered by ConfigurationClassPostProcessor)
-		if (!NativeDetector.inNativeImage() && beanFactory.getTempClassLoader() == null && beanFactory.containsBean(LOAD_TIME_WEAVER_BEAN_NAME)) {
+		if (!NativeDetector.inNativeImage() && beanFactory.getTempClassLoader() == null &&
+				beanFactory.containsBean(LOAD_TIME_WEAVER_BEAN_NAME)) {
 			beanFactory.addBeanPostProcessor(new LoadTimeWeaverAwareProcessor(beanFactory));
 			beanFactory.setTempClassLoader(new ContextTypeMatchClassLoader(beanFactory.getBeanClassLoader()));
 		}
@@ -1082,6 +1091,9 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 			// Let subclasses do some final clean-up if they wish...
 			onClose();
 
+			// Reset common introspection caches to avoid class reference leaks.
+			resetCommonCaches();
+
 			// Reset local application listeners to pre-refresh state.
 			if (this.earlyApplicationListeners != null) {
 				this.applicationListeners.clear();

spring-context/src/main/java/org/springframework/context/support/AbstractXmlApplicationContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import java.io.IOException;
 
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+import org.springframework.beans.factory.xml.BeanDefinitionDocumentReader;
 import org.springframework.beans.factory.xml.ResourceEntityResolver;
 import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
 import org.springframework.context.ApplicationContext;
@@ -84,7 +85,7 @@ public abstract class AbstractXmlApplicationContext extends AbstractRefreshableC
 
 		// Configure the bean definition reader with this context's
 		// resource loading environment.
-		beanDefinitionReader.setEnvironment(this.getEnvironment());
+		beanDefinitionReader.setEnvironment(getEnvironment());
 		beanDefinitionReader.setResourceLoader(this);
 		beanDefinitionReader.setEntityResolver(new ResourceEntityResolver(this));
 
@@ -95,12 +96,13 @@ public abstract class AbstractXmlApplicationContext extends AbstractRefreshableC
 	}
 
 	/**
-	 * Initialize the bean definition reader used for loading the bean
-	 * definitions of this context. Default implementation is empty.
+	 * Initialize the bean definition reader used for loading the bean definitions
+	 * of this context. The default implementation sets the validating flag.
 	 * <p>Can be overridden in subclasses, e.g. for turning off XML validation
-	 * or using a different XmlBeanDefinitionParser implementation.
+	 * or using a different {@link BeanDefinitionDocumentReader} implementation.
 	 * @param reader the bean definition reader used by this context
-	 * @see org.springframework.beans.factory.xml.XmlBeanDefinitionReader#setDocumentReaderClass
+	 * @see XmlBeanDefinitionReader#setValidating
+	 * @see XmlBeanDefinitionReader#setDocumentReaderClass
 	 */
 	protected void initBeanDefinitionReader(XmlBeanDefinitionReader reader) {
 		reader.setValidating(this.validating);

spring-context/src/main/java/org/springframework/context/support/ContextTypeMatchClassLoader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,8 @@ import java.security.ProtectionDomain;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
+import org.apache.commons.logging.LogFactory;
+
 import org.springframework.core.DecoratingClassLoader;
 import org.springframework.core.OverridingClassLoader;
 import org.springframework.core.SmartClassLoader;
@@ -45,15 +47,27 @@ class ContextTypeMatchClassLoader extends DecoratingClassLoader implements Smart
 	}
 
 
-	private static Method findLoadedClassMethod;
+	@Nullable
+	private static final Method findLoadedClassMethod;
 
 	static {
+		// Try to enable findLoadedClass optimization which allows us to selectively
+		// override classes that have not been loaded yet. If not accessible, we will
+		// always override requested classes, even when the classes have been loaded
+		// by the parent ClassLoader already and cannot be transformed anymore anyway.
+		Method method;
 		try {
-			findLoadedClassMethod = ClassLoader.class.getDeclaredMethod("findLoadedClass", String.class);
+			method = ClassLoader.class.getDeclaredMethod("findLoadedClass", String.class);
+			ReflectionUtils.makeAccessible(method);
 		}
-		catch (NoSuchMethodException ex) {
-			throw new IllegalStateException("Invalid [java.lang.ClassLoader] class: no 'findLoadedClass' method defined!");
+		catch (Throwable ex) {
+			// Typically a JDK 9+ InaccessibleObjectException...
+			// Avoid through JVM startup with --add-opens=java.base/java.lang=ALL-UNNAMED
+			method = null;
+			LogFactory.getLog(ContextTypeMatchClassLoader.class).debug(
+					"ClassLoader.findLoadedClass not accessible -> will always override requested class", ex);
 		}
+		findLoadedClassMethod = method;
 	}
 
 
@@ -96,13 +110,14 @@ class ContextTypeMatchClassLoader extends DecoratingClassLoader implements Smart
 			if (isExcluded(className) || ContextTypeMatchClassLoader.this.isExcluded(className)) {
 				return false;
 			}
-			ReflectionUtils.makeAccessible(findLoadedClassMethod);
-			ClassLoader parent = getParent();
-			while (parent != null) {
-				if (ReflectionUtils.invokeMethod(findLoadedClassMethod, parent, className) != null) {
-					return false;
+			if (findLoadedClassMethod != null) {
+				ClassLoader parent = getParent();
+				while (parent != null) {
+					if (ReflectionUtils.invokeMethod(findLoadedClassMethod, parent, className) != null) {
+						return false;
+					}
+					parent = parent.getParent();
 				}
-				parent = parent.getParent();
 			}
 			return true;
 		}

spring-context/src/main/java/org/springframework/context/support/DefaultLifecycleProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -64,9 +64,10 @@ public class DefaultLifecycleProcessor implements LifecycleProcessor, BeanFactor
 
 
 	/**
-	 * Specify the maximum time allotted in milliseconds for the shutdown of
-	 * any phase (group of SmartLifecycle beans with the same 'phase' value).
-	 * <p>The default value is 30 seconds.
+	 * Specify the maximum time allotted in milliseconds for the shutdown of any
+	 * phase (group of {@link SmartLifecycle} beans with the same 'phase' value).
+	 * <p>The default value is 30000 milliseconds (30 seconds).
+	 * @see SmartLifecycle#getPhase()
 	 */
 	public void setTimeoutPerShutdownPhase(long timeoutPerShutdownPhase) {
 		this.timeoutPerShutdownPhase = timeoutPerShutdownPhase;

spring-context/src/main/java/org/springframework/scheduling/annotation/Scheduled.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,8 +28,8 @@ import org.springframework.scheduling.config.ScheduledTaskRegistrar;
 
 /**
  * Annotation that marks a method to be scheduled. Exactly one of the
- * {@link #cron}, {@link #fixedDelay}, or {@link #fixedRate} attributes must be
- * specified.
+ * {@link #cron}, {@link #fixedDelay}, or {@link #fixedRate} attributes
+ * must be specified.
  *
  * <p>The annotated method must expect no arguments. It will typically have
  * a {@code void} return type; if not, the returned value will be ignored
@@ -40,6 +40,12 @@ import org.springframework.scheduling.config.ScheduledTaskRegistrar;
  * done manually or, more conveniently, through the {@code <task:annotation-driven/>}
  * XML element or {@link EnableScheduling @EnableScheduling} annotation.
  *
+ * <p>This annotation can be used as a <em>{@linkplain Repeatable repeatable}</em>
+ * annotation. If several scheduled declarations are found on the same method,
+ * each of them will be processed independently, with a separate trigger firing
+ * for each of them. As a consequence, such co-located schedules may overlap
+ * and execute multiple times in parallel or in immediate succession.
+ *
  * <p>This annotation may be used as a <em>meta-annotation</em> to create custom
  * <em>composed annotations</em> with attribute overrides.
  *
@@ -117,9 +123,12 @@ public @interface Scheduled {
 	 * last invocation and the start of the next.
 	 * <p>The time unit is milliseconds by default but can be overridden via
 	 * {@link #timeUnit}.
+	 * <p>This attribute variant supports Spring-style "${...}" placeholders
+	 * as well as SpEL expressions.
 	 * @return the delay as a String value &mdash; for example, a placeholder
 	 * or a {@link java.time.Duration#parse java.time.Duration} compliant value
 	 * @since 3.2.2
+	 * @see #fixedDelay()
 	 */
 	String fixedDelayString() default "";
 
@@ -135,9 +144,12 @@ public @interface Scheduled {
 	 * Execute the annotated method with a fixed period between invocations.
 	 * <p>The time unit is milliseconds by default but can be overridden via
 	 * {@link #timeUnit}.
+	 * <p>This attribute variant supports Spring-style "${...}" placeholders
+	 * as well as SpEL expressions.
 	 * @return the period as a String value &mdash; for example, a placeholder
 	 * or a {@link java.time.Duration#parse java.time.Duration} compliant value
 	 * @since 3.2.2
+	 * @see #fixedRate()
 	 */
 	String fixedRateString() default "";
 
@@ -156,9 +168,12 @@ public @interface Scheduled {
 	 * {@link #fixedRate} or {@link #fixedDelay} task.
 	 * <p>The time unit is milliseconds by default but can be overridden via
 	 * {@link #timeUnit}.
+	 * <p>This attribute variant supports Spring-style "${...}" placeholders
+	 * as well as SpEL expressions.
 	 * @return the initial delay as a String value &mdash; for example, a placeholder
 	 * or a {@link java.time.Duration#parse java.time.Duration} compliant value
 	 * @since 3.2.2
+	 * @see #initialDelay()
 	 */
 	String initialDelayString() default "";
 

spring-context/src/main/java/org/springframework/scheduling/annotation/ScheduledAnnotationBeanPostProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -160,7 +160,7 @@ public class ScheduledAnnotationBeanPostProcessor
 	 * @since 5.1
 	 */
 	public ScheduledAnnotationBeanPostProcessor(ScheduledTaskRegistrar registrar) {
-		Assert.notNull(registrar, "ScheduledTaskRegistrar is required");
+		Assert.notNull(registrar, "ScheduledTaskRegistrar must not be null");
 		this.registrar = registrar;
 	}
 
@@ -580,7 +580,7 @@ public class ScheduledAnnotationBeanPostProcessor
 		}
 		if (tasks != null) {
 			for (ScheduledTask task : tasks) {
-				task.cancel();
+				task.cancel(false);
 			}
 		}
 	}
@@ -598,7 +598,7 @@ public class ScheduledAnnotationBeanPostProcessor
 			Collection<Set<ScheduledTask>> allTasks = this.scheduledTasks.values();
 			for (Set<ScheduledTask> tasks : allTasks) {
 				for (ScheduledTask task : tasks) {
-					task.cancel();
+					task.cancel(false);
 				}
 			}
 			this.scheduledTasks.clear();

spring-context/src/main/java/org/springframework/scheduling/annotation/SchedulingConfigurer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,10 +40,10 @@ import org.springframework.scheduling.config.ScheduledTaskRegistrar;
 public interface SchedulingConfigurer {
 
 	/**
-	 * Callback allowing a {@link org.springframework.scheduling.TaskScheduler
-	 * TaskScheduler} and specific {@link org.springframework.scheduling.config.Task Task}
-	 * instances to be registered against the given the {@link ScheduledTaskRegistrar}.
-	 * @param taskRegistrar the registrar to be configured.
+	 * Callback allowing a {@link org.springframework.scheduling.TaskScheduler}
+	 * and specific {@link org.springframework.scheduling.config.Task} instances
+	 * to be registered against the given the {@link ScheduledTaskRegistrar}.
+	 * @param taskRegistrar the registrar to be configured
 	 */
 	void configureTasks(ScheduledTaskRegistrar taskRegistrar);
 

spring-context/src/main/java/org/springframework/scheduling/concurrent/ConcurrentTaskExecutor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -83,6 +83,9 @@ public class ConcurrentTaskExecutor implements AsyncListenableTaskExecutor, Sche
 
 	private TaskExecutorAdapter adaptedExecutor;
 
+	@Nullable
+	private TaskDecorator taskDecorator;
+
 
 	/**
 	 * Create a new ConcurrentTaskExecutor, using a single thread executor as default.
@@ -138,6 +141,7 @@ public class ConcurrentTaskExecutor implements AsyncListenableTaskExecutor, Sche
 	 * @since 4.3
 	 */
 	public final void setTaskDecorator(TaskDecorator taskDecorator) {
+		this.taskDecorator = taskDecorator;
 		this.adaptedExecutor.setTaskDecorator(taskDecorator);
 	}
 
@@ -174,11 +178,15 @@ public class ConcurrentTaskExecutor implements AsyncListenableTaskExecutor, Sche
 	}
 
 
-	private static TaskExecutorAdapter getAdaptedExecutor(Executor concurrentExecutor) {
+	private TaskExecutorAdapter getAdaptedExecutor(Executor concurrentExecutor) {
 		if (managedExecutorServiceClass != null && managedExecutorServiceClass.isInstance(concurrentExecutor)) {
 			return new ManagedTaskExecutorAdapter(concurrentExecutor);
 		}
-		return new TaskExecutorAdapter(concurrentExecutor);
+		TaskExecutorAdapter adapter = new TaskExecutorAdapter(concurrentExecutor);
+		if (this.taskDecorator != null) {
+			adapter.setTaskDecorator(this.taskDecorator);
+		}
+		return adapter;
 	}
 
 

spring-context/src/main/java/org/springframework/scheduling/concurrent/ConcurrentTaskScheduler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -100,7 +100,7 @@ public class ConcurrentTaskScheduler extends ConcurrentTaskExecutor implements T
 	 */
 	public ConcurrentTaskScheduler() {
 		super();
-		this.scheduledExecutor = initScheduledExecutor(null);
+		initScheduledExecutor(null);
 	}
 
 	/**
@@ -115,7 +115,7 @@ public class ConcurrentTaskScheduler extends ConcurrentTaskExecutor implements T
 	 */
 	public ConcurrentTaskScheduler(ScheduledExecutorService scheduledExecutor) {
 		super(scheduledExecutor);
-		this.scheduledExecutor = initScheduledExecutor(scheduledExecutor);
+		initScheduledExecutor(scheduledExecutor);
 	}
 
 	/**
@@ -131,11 +131,11 @@ public class ConcurrentTaskScheduler extends ConcurrentTaskExecutor implements T
 	 */
 	public ConcurrentTaskScheduler(Executor concurrentExecutor, ScheduledExecutorService scheduledExecutor) {
 		super(concurrentExecutor);
-		this.scheduledExecutor = initScheduledExecutor(scheduledExecutor);
+		initScheduledExecutor(scheduledExecutor);
 	}
 
 
-	private ScheduledExecutorService initScheduledExecutor(@Nullable ScheduledExecutorService scheduledExecutor) {
+	private void initScheduledExecutor(@Nullable ScheduledExecutorService scheduledExecutor) {
 		if (scheduledExecutor != null) {
 			this.scheduledExecutor = scheduledExecutor;
 			this.enterpriseConcurrentScheduler = (managedScheduledExecutorServiceClass != null &&
@@ -145,7 +145,6 @@ public class ConcurrentTaskScheduler extends ConcurrentTaskExecutor implements T
 			this.scheduledExecutor = Executors.newSingleThreadScheduledExecutor();
 			this.enterpriseConcurrentScheduler = false;
 		}
-		return this.scheduledExecutor;
 	}
 
 	/**
@@ -207,9 +206,9 @@ public class ConcurrentTaskScheduler extends ConcurrentTaskExecutor implements T
 
 	@Override
 	public ScheduledFuture<?> schedule(Runnable task, Date startTime) {
-		long initialDelay = startTime.getTime() - this.clock.millis();
+		long delay = startTime.getTime() - this.clock.millis();
 		try {
-			return this.scheduledExecutor.schedule(decorateTask(task, false), initialDelay, TimeUnit.MILLISECONDS);
+			return this.scheduledExecutor.schedule(decorateTask(task, false), delay, TimeUnit.MILLISECONDS);
 		}
 		catch (RejectedExecutionException ex) {
 			throw new TaskRejectedException("Executor [" + this.scheduledExecutor + "] did not accept task: " + task, ex);

spring-context/src/main/java/org/springframework/scheduling/concurrent/ExecutorConfigurationSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,7 +36,10 @@ import org.springframework.lang.Nullable;
  * Base class for setting up a {@link java.util.concurrent.ExecutorService}
  * (typically a {@link java.util.concurrent.ThreadPoolExecutor} or
  * {@link java.util.concurrent.ScheduledThreadPoolExecutor}).
- * Defines common configuration settings and common lifecycle handling.
+ *
+ * <p>Defines common configuration settings and common lifecycle handling,
+ * inheriting thread customization options (name, priority, etc) from
+ * {@link org.springframework.util.CustomizableThreadCreator}.
  *
  * @author Juergen Hoeller
  * @since 3.0
@@ -105,9 +108,9 @@ public abstract class ExecutorConfigurationSupport extends CustomizableThreadFac
 	/**
 	 * Set whether to wait for scheduled tasks to complete on shutdown,
 	 * not interrupting running tasks and executing all tasks in the queue.
-	 * <p>Default is "false", shutting down immediately through interrupting
-	 * ongoing tasks and clearing the queue. Switch this flag to "true" if you
-	 * prefer fully completed tasks at the expense of a longer shutdown phase.
+	 * <p>Default is {@code false}, shutting down immediately through interrupting
+	 * ongoing tasks and clearing the queue. Switch this flag to {@code true} if
+	 * you prefer fully completed tasks at the expense of a longer shutdown phase.
 	 * <p>Note that Spring's container shutdown continues while ongoing tasks
 	 * are being completed. If you want this executor to block and wait for the
 	 * termination of tasks before the rest of the container continues to shut
@@ -199,8 +202,7 @@ public abstract class ExecutorConfigurationSupport extends CustomizableThreadFac
 
 
 	/**
-	 * Calls {@code shutdown} when the BeanFactory destroys
-	 * the task executor instance.
+	 * Calls {@code shutdown} when the BeanFactory destroys the executor instance.
 	 * @see #shutdown()
 	 */
 	@Override
@@ -209,9 +211,13 @@ public abstract class ExecutorConfigurationSupport extends CustomizableThreadFac
 	}
 
 	/**
-	 * Perform a shutdown on the underlying ExecutorService.
+	 * Perform a full shutdown on the underlying ExecutorService,
+	 * according to the corresponding configuration settings.
+	 * @see #setWaitForTasksToCompleteOnShutdown
+	 * @see #setAwaitTerminationMillis
 	 * @see java.util.concurrent.ExecutorService#shutdown()
 	 * @see java.util.concurrent.ExecutorService#shutdownNow()
+	 * @see java.util.concurrent.ExecutorService#awaitTermination
 	 */
 	public void shutdown() {
 		if (logger.isDebugEnabled()) {

spring-context/src/main/java/org/springframework/scheduling/concurrent/ReschedulingRunnable.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -78,8 +78,8 @@ class ReschedulingRunnable extends DelegatingErrorHandlingRunnable implements Sc
 			if (this.scheduledExecutionTime == null) {
 				return null;
 			}
-			long initialDelay = this.scheduledExecutionTime.getTime() - this.triggerContext.getClock().millis();
-			this.currentFuture = this.executor.schedule(this, initialDelay, TimeUnit.MILLISECONDS);
+			long delay = this.scheduledExecutionTime.getTime() - this.triggerContext.getClock().millis();
+			this.currentFuture = this.executor.schedule(this, delay, TimeUnit.MILLISECONDS);
 			return this;
 		}
 	}

spring-context/src/main/java/org/springframework/scheduling/concurrent/ThreadPoolTaskScheduler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -380,9 +380,9 @@ public class ThreadPoolTaskScheduler extends ExecutorConfigurationSupport
 	@Override
 	public ScheduledFuture<?> schedule(Runnable task, Date startTime) {
 		ScheduledExecutorService executor = getScheduledExecutor();
-		long initialDelay = startTime.getTime() - this.clock.millis();
+		long delay = startTime.getTime() - this.clock.millis();
 		try {
-			return executor.schedule(errorHandlingTask(task, false), initialDelay, TimeUnit.MILLISECONDS);
+			return executor.schedule(errorHandlingTask(task, false), delay, TimeUnit.MILLISECONDS);
 		}
 		catch (RejectedExecutionException ex) {
 			throw new TaskRejectedException("Executor [" + executor + "] did not accept task: " + task, ex);

spring-context/src/main/java/org/springframework/scheduling/config/ScheduledTaskRegistrar.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,8 +41,8 @@ import org.springframework.util.CollectionUtils;
  * Helper bean for registering tasks with a {@link TaskScheduler}, typically using cron
  * expressions.
  *
- * <p>As of Spring 3.1, {@code ScheduledTaskRegistrar} has a more prominent user-facing
- * role when used in conjunction with the {@link
+ * <p>{@code ScheduledTaskRegistrar} has a more prominent user-facing role when used in
+ * conjunction with the {@link
  * org.springframework.scheduling.annotation.EnableAsync @EnableAsync} annotation and its
  * {@link org.springframework.scheduling.annotation.SchedulingConfigurer
  * SchedulingConfigurer} callback interface.
@@ -552,7 +552,7 @@ public class ScheduledTaskRegistrar implements ScheduledTaskHolder, Initializing
 	@Override
 	public void destroy() {
 		for (ScheduledTask task : this.scheduledTasks) {
-			task.cancel();
+			task.cancel(false);
 		}
 		if (this.localExecutor != null) {
 			this.localExecutor.shutdownNow();

spring-context/src/main/java/org/springframework/validation/AbstractBindingResult.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -102,8 +102,8 @@ public abstract class AbstractBindingResult extends AbstractErrors implements Bi
 	}
 
 	@Override
-	public void rejectValue(@Nullable String field, String errorCode, @Nullable Object[] errorArgs,
-			@Nullable String defaultMessage) {
+	public void rejectValue(@Nullable String field, String errorCode,
+			@Nullable Object[] errorArgs, @Nullable String defaultMessage) {
 
 		if (!StringUtils.hasLength(getNestedPath()) && !StringUtils.hasLength(field)) {
 			// We're at the top of the nested object hierarchy,

spring-context/src/main/java/org/springframework/validation/AbstractErrors.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,13 +28,14 @@ import org.springframework.lang.Nullable;
 import org.springframework.util.StringUtils;
 
 /**
- * Abstract implementation of the {@link Errors} interface. Provides common
- * access to evaluated errors; however, does not define concrete management
+ * Abstract implementation of the {@link Errors} interface.
+ * Provides nested path handling but does not define concrete management
  * of {@link ObjectError ObjectErrors} and {@link FieldError FieldErrors}.
  *
  * @author Juergen Hoeller
  * @author Rossen Stoyanchev
  * @since 2.5.3
+ * @see AbstractBindingResult
  */
 @SuppressWarnings("serial")
 public abstract class AbstractErrors implements Errors, Serializable {
@@ -81,8 +82,8 @@ public abstract class AbstractErrors implements Errors, Serializable {
 			nestedPath = "";
 		}
 		nestedPath = canonicalFieldName(nestedPath);
-		if (nestedPath.length() > 0 && !nestedPath.endsWith(Errors.NESTED_PATH_SEPARATOR)) {
-			nestedPath += Errors.NESTED_PATH_SEPARATOR;
+		if (nestedPath.length() > 0 && !nestedPath.endsWith(NESTED_PATH_SEPARATOR)) {
+			nestedPath += NESTED_PATH_SEPARATOR;
 		}
 		this.nestedPath = nestedPath;
 	}
@@ -97,7 +98,7 @@ public abstract class AbstractErrors implements Errors, Serializable {
 		}
 		else {
 			String path = getNestedPath();
-			return (path.endsWith(Errors.NESTED_PATH_SEPARATOR) ?
+			return (path.endsWith(NESTED_PATH_SEPARATOR) ?
 					path.substring(0, path.length() - NESTED_PATH_SEPARATOR.length()) : path);
 		}
 	}
@@ -201,9 +202,9 @@ public abstract class AbstractErrors implements Errors, Serializable {
 		List<FieldError> fieldErrors = getFieldErrors();
 		List<FieldError> result = new ArrayList<>();
 		String fixedField = fixedField(field);
-		for (FieldError error : fieldErrors) {
-			if (isMatchingFieldError(fixedField, error)) {
-				result.add(error);
+		for (FieldError fieldError : fieldErrors) {
+			if (isMatchingFieldError(fixedField, fieldError)) {
+				result.add(fieldError);
 			}
 		}
 		return Collections.unmodifiableList(result);

spring-context/src/main/java/org/springframework/validation/BeanPropertyBindingResult.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -55,7 +55,7 @@ public class BeanPropertyBindingResult extends AbstractPropertyBindingResult imp
 
 
 	/**
-	 * Creates a new instance of the {@link BeanPropertyBindingResult} class.
+	 * Create a new {@code BeanPropertyBindingResult} for the given target.
 	 * @param target the target bean to bind onto
 	 * @param objectName the name of the target object
 	 */
@@ -64,7 +64,7 @@ public class BeanPropertyBindingResult extends AbstractPropertyBindingResult imp
 	}
 
 	/**
-	 * Creates a new instance of the {@link BeanPropertyBindingResult} class.
+	 * Create a new {@code BeanPropertyBindingResult} for the given target.
 	 * @param target the target bean to bind onto
 	 * @param objectName the name of the target object
 	 * @param autoGrowNestedPaths whether to "auto-grow" a nested path that contains a null value

spring-context/src/main/java/org/springframework/validation/BindException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -128,7 +128,9 @@ public class BindException extends Exception implements BindingResult {
 	}
 
 	@Override
-	public void rejectValue(@Nullable String field, String errorCode, @Nullable Object[] errorArgs, @Nullable String defaultMessage) {
+	public void rejectValue(@Nullable String field, String errorCode,
+			@Nullable Object[] errorArgs, @Nullable String defaultMessage) {
+
 		this.bindingResult.rejectValue(field, errorCode, errorArgs, defaultMessage);
 	}
 

spring-context/src/main/java/org/springframework/validation/DirectFieldBindingResult.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -46,7 +46,7 @@ public class DirectFieldBindingResult extends AbstractPropertyBindingResult {
 
 
 	/**
-	 * Create a new DirectFieldBindingResult instance.
+	 * Create a new {@code DirectFieldBindingResult} for the given target.
 	 * @param target the target object to bind onto
 	 * @param objectName the name of the target object
 	 */
@@ -55,7 +55,7 @@ public class DirectFieldBindingResult extends AbstractPropertyBindingResult {
 	}
 
 	/**
-	 * Create a new DirectFieldBindingResult instance.
+	 * Create a new {@code DirectFieldBindingResult} for the given target.
 	 * @param target the target object to bind onto
 	 * @param objectName the name of the target object
 	 * @param autoGrowNestedPaths whether to "auto-grow" a nested path that contains a null value

spring-context/src/main/java/org/springframework/validation/Errors.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,24 +22,24 @@ import org.springframework.beans.PropertyAccessor;
 import org.springframework.lang.Nullable;
 
 /**
- * Stores and exposes information about data-binding and validation
- * errors for a specific object.
+ * Stores and exposes information about data-binding and validation errors
+ * for a specific object.
  *
- * <p>Field names can be properties of the target object (e.g. "name"
- * when binding to a customer object), or nested fields in case of
- * subobjects (e.g. "address.street"). Supports subtree navigation
- * via {@link #setNestedPath(String)}: for example, an
- * {@code AddressValidator} validates "address", not being aware
- * that this is a subobject of customer.
+ * <p>Field names are typically properties of the target object (e.g. "name"
+ * when binding to a customer object). Implementations may also support nested
+ * fields in case of nested objects (e.g. "address.street"), in conjunction
+ * with subtree navigation via {@link #setNestedPath}: for example, an
+ * {@code AddressValidator} may validate "address", not being aware that this
+ * is a nested object of a top-level customer object.
  *
  * <p>Note: {@code Errors} objects are single-threaded.
  *
  * @author Rod Johnson
  * @author Juergen Hoeller
- * @see #setNestedPath
- * @see BindException
- * @see DataBinder
+ * @see Validator
  * @see ValidationUtils
+ * @see BindException
+ * @see BindingResult
  */
 public interface Errors {
 
@@ -66,6 +66,7 @@ public interface Errors {
 	 * @param nestedPath nested path within this object,
 	 * e.g. "address" (defaults to "", {@code null} is also acceptable).
 	 * Can end with a dot: both "address" and "address." are valid.
+	 * @see #getNestedPath()
 	 */
 	void setNestedPath(String nestedPath);
 
@@ -73,6 +74,7 @@ public interface Errors {
 	 * Return the current nested path of this {@link Errors} object.
 	 * <p>Returns a nested path with a dot, i.e. "address.", for easy
 	 * building of concatenated paths. Default is an empty String.
+	 * @see #setNestedPath(String)
 	 */
 	String getNestedPath();
 
@@ -86,14 +88,14 @@ public interface Errors {
 	 * <p>For example: current path "spouse.", pushNestedPath("child") &rarr;
 	 * result path "spouse.child."; popNestedPath() &rarr; "spouse." again.
 	 * @param subPath the sub path to push onto the nested path stack
-	 * @see #popNestedPath
+	 * @see #popNestedPath()
 	 */
 	void pushNestedPath(String subPath);
 
 	/**
 	 * Pop the former nested path from the nested path stack.
 	 * @throws IllegalStateException if there is no former nested path on the stack
-	 * @see #pushNestedPath
+	 * @see #pushNestedPath(String)
 	 */
 	void popNestedPath() throws IllegalStateException;
 
@@ -101,6 +103,7 @@ public interface Errors {
 	 * Register a global error for the entire target object,
 	 * using the given error description.
 	 * @param errorCode error code, interpretable as a message key
+	 * @see #reject(String, Object[], String)
 	 */
 	void reject(String errorCode);
 
@@ -109,6 +112,7 @@ public interface Errors {
 	 * using the given error description.
 	 * @param errorCode error code, interpretable as a message key
 	 * @param defaultMessage fallback default message
+	 * @see #reject(String, Object[], String)
 	 */
 	void reject(String errorCode, String defaultMessage);
 
@@ -119,6 +123,7 @@ public interface Errors {
 	 * @param errorArgs error arguments, for argument binding via MessageFormat
 	 * (can be {@code null})
 	 * @param defaultMessage fallback default message
+	 * @see #rejectValue(String, String, Object[], String)
 	 */
 	void reject(String errorCode, @Nullable Object[] errorArgs, @Nullable String defaultMessage);
 
@@ -132,7 +137,7 @@ public interface Errors {
 	 * global error if the current object is the top object.
 	 * @param field the field name (may be {@code null} or empty String)
 	 * @param errorCode error code, interpretable as a message key
-	 * @see #getNestedPath()
+	 * @see #rejectValue(String, String, Object[], String)
 	 */
 	void rejectValue(@Nullable String field, String errorCode);
 
@@ -147,7 +152,7 @@ public interface Errors {
 	 * @param field the field name (may be {@code null} or empty String)
 	 * @param errorCode error code, interpretable as a message key
 	 * @param defaultMessage fallback default message
-	 * @see #getNestedPath()
+	 * @see #rejectValue(String, String, Object[], String)
 	 */
 	void rejectValue(@Nullable String field, String errorCode, String defaultMessage);
 
@@ -164,7 +169,7 @@ public interface Errors {
 	 * @param errorArgs error arguments, for argument binding via MessageFormat
 	 * (can be {@code null})
 	 * @param defaultMessage fallback default message
-	 * @see #getNestedPath()
+	 * @see #reject(String, Object[], String)
 	 */
 	void rejectValue(@Nullable String field, String errorCode,
 			@Nullable Object[] errorArgs, @Nullable String defaultMessage);
@@ -179,35 +184,40 @@ public interface Errors {
 	 * to refer to the same target object, or at least contain compatible errors
 	 * that apply to the target object of this {@code Errors} instance.
 	 * @param errors the {@code Errors} instance to merge in
+	 * @see #getAllErrors()
 	 */
 	void addAllErrors(Errors errors);
 
 	/**
-	 * Return if there were any errors.
+	 * Determine if there were any errors.
+	 * @see #hasGlobalErrors()
+	 * @see #hasFieldErrors()
 	 */
 	boolean hasErrors();
 
 	/**
-	 * Return the total number of errors.
+	 * Determine the total number of errors.
+	 * @see #getGlobalErrorCount()
+	 * @see #getFieldErrorCount()
 	 */
 	int getErrorCount();
 
 	/**
 	 * Get all errors, both global and field ones.
-	 * @return a list of {@link ObjectError} instances
+	 * @return a list of {@link ObjectError}/{@link FieldError} instances
+	 * @see #getGlobalErrors()
+	 * @see #getFieldErrors()
 	 */
 	List<ObjectError> getAllErrors();
 
 	/**
-	 * Are there any global errors?
-	 * @return {@code true} if there are any global errors
+	 * Determine if there were any global errors.
 	 * @see #hasFieldErrors()
 	 */
 	boolean hasGlobalErrors();
 
 	/**
-	 * Return the number of global errors.
-	 * @return the number of global errors
+	 * Determine the number of global errors.
 	 * @see #getFieldErrorCount()
 	 */
 	int getGlobalErrorCount();
@@ -215,26 +225,26 @@ public interface Errors {
 	/**
 	 * Get all global errors.
 	 * @return a list of {@link ObjectError} instances
+	 * @see #getFieldErrors()
 	 */
 	List<ObjectError> getGlobalErrors();
 
 	/**
 	 * Get the <i>first</i> global error, if any.
 	 * @return the global error, or {@code null}
+	 * @see #getFieldError()
 	 */
 	@Nullable
 	ObjectError getGlobalError();
 
 	/**
-	 * Are there any field errors?
-	 * @return {@code true} if there are any errors associated with a field
+	 * Determine if there were any errors associated with a field.
 	 * @see #hasGlobalErrors()
 	 */
 	boolean hasFieldErrors();
 
 	/**
-	 * Return the number of errors associated with a field.
-	 * @return the number of errors associated with a field
+	 * Determine the number of errors associated with a field.
 	 * @see #getGlobalErrorCount()
 	 */
 	int getFieldErrorCount();
@@ -242,36 +252,39 @@ public interface Errors {
 	/**
 	 * Get all errors associated with a field.
 	 * @return a List of {@link FieldError} instances
+	 * @see #getGlobalErrors()
 	 */
 	List<FieldError> getFieldErrors();
 
 	/**
 	 * Get the <i>first</i> error associated with a field, if any.
 	 * @return the field-specific error, or {@code null}
+	 * @see #getGlobalError()
 	 */
 	@Nullable
 	FieldError getFieldError();
 
 	/**
-	 * Are there any errors associated with the given field?
+	 * Determine if there were any errors associated with the given field.
 	 * @param field the field name
-	 * @return {@code true} if there were any errors associated with the given field
+	 * @see #hasFieldErrors()
 	 */
 	boolean hasFieldErrors(String field);
 
 	/**
-	 * Return the number of errors associated with the given field.
+	 * Determine the number of errors associated with the given field.
 	 * @param field the field name
-	 * @return the number of errors associated with the given field
+	 * @see #getFieldErrorCount()
 	 */
 	int getFieldErrorCount(String field);
 
 	/**
 	 * Get all errors associated with the given field.
-	 * <p>Implementations should support not only full field names like
-	 * "name" but also pattern matches like "na*" or "address.*".
+	 * <p>Implementations may support not only full field names like
+	 * "address.street" but also pattern matches like "address.*".
 	 * @param field the field name
 	 * @return a List of {@link FieldError} instances
+	 * @see #getFieldErrors()
 	 */
 	List<FieldError> getFieldErrors(String field);
 
@@ -279,6 +292,7 @@ public interface Errors {
 	 * Get the first error associated with the given field, if any.
 	 * @param field the field name
 	 * @return the field-specific error, or {@code null}
+	 * @see #getFieldError()
 	 */
 	@Nullable
 	FieldError getFieldError(String field);
@@ -290,17 +304,19 @@ public interface Errors {
 	 * even if there were type mismatches.
 	 * @param field the field name
 	 * @return the current value of the given field
+	 * @see #getFieldType(String)
 	 */
 	@Nullable
 	Object getFieldValue(String field);
 
 	/**
-	 * Return the type of a given field.
+	 * Determine the type of the given field, as far as possible.
 	 * <p>Implementations should be able to determine the type even
 	 * when the field value is {@code null}, for example from some
 	 * associated descriptor.
 	 * @param field the field name
 	 * @return the type of the field, or {@code null} if not determinable
+	 * @see #getFieldValue(String)
 	 */
 	@Nullable
 	Class<?> getFieldType(String field);

spring-context/src/main/java/org/springframework/validation/FieldError.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -124,6 +124,8 @@ public class FieldError extends ObjectError {
 
 	@Override
 	public String toString() {
+		// We would preferably use ObjectUtils.nullSafeConciseToString(rejectedValue) here but
+		// keep including the full nullSafeToString representation for backwards compatibility.
 		return "Field error in object '" + getObjectName() + "' on field '" + this.field +
 				"': rejected value [" + ObjectUtils.nullSafeToString(this.rejectedValue) + "]; " +
 				resolvableToString();

spring-context/src/main/java/org/springframework/validation/Validator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -54,14 +54,14 @@ package org.springframework.validation;
  *    }
  * }</pre>
  *
- * <p>See also the Spring reference manual for a fuller discussion of
- * the {@code Validator} interface and its role in an enterprise
- * application.
+ * <p>See also the Spring reference manual for a fuller discussion of the
+ * {@code Validator} interface and its role in an enterprise application.
  *
  * @author Rod Johnson
  * @see SmartValidator
  * @see Errors
  * @see ValidationUtils
+ * @see DataBinder#setValidator
  */
 public interface Validator {
 
@@ -81,11 +81,14 @@ public interface Validator {
 	boolean supports(Class<?> clazz);
 
 	/**
-	 * Validate the supplied {@code target} object, which must be
-	 * of a {@link Class} for which the {@link #supports(Class)} method
-	 * typically has (or would) return {@code true}.
+	 * Validate the given {@code target} object which must be of a
+	 * {@link Class} for which the {@link #supports(Class)} method
+	 * typically has returned (or would return) {@code true}.
 	 * <p>The supplied {@link Errors errors} instance can be used to report
-	 * any resulting validation errors.
+	 * any resulting validation errors, typically as part of a larger
+	 * binding process which this validator is meant to participate in.
+	 * Binding errors have typically been pre-registered with the
+	 * {@link Errors errors} instance before this invocation already.
 	 * @param target the object that is to be validated
 	 * @param errors contextual state about the validation process
 	 * @see ValidationUtils

spring-context/src/main/java/org/springframework/validation/annotation/ValidationAnnotationUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,37 +26,46 @@ import org.springframework.lang.Nullable;
  * Mainly for internal use within the framework.
  *
  * @author Christoph Dreis
+ * @author Juergen Hoeller
  * @since 5.3.7
  */
 public abstract class ValidationAnnotationUtils {
 
 	private static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];
 
+
 	/**
 	 * Determine any validation hints by the given annotation.
-	 * <p>This implementation checks for {@code @javax.validation.Valid},
-	 * Spring's {@link org.springframework.validation.annotation.Validated},
-	 * and custom annotations whose name starts with "Valid".
+	 * <p>This implementation checks for Spring's
+	 * {@link org.springframework.validation.annotation.Validated},
+	 * {@code @javax.validation.Valid}, and custom annotations whose
+	 * name starts with "Valid" which may optionally declare validation
+	 * hints through the "value" attribute.
 	 * @param ann the annotation (potentially a validation annotation)
 	 * @return the validation hints to apply (possibly an empty array),
 	 * or {@code null} if this annotation does not trigger any validation
 	 */
 	@Nullable
 	public static Object[] determineValidationHints(Annotation ann) {
+		// Direct presence of @Validated ?
+		if (ann instanceof Validated) {
+			return ((Validated) ann).value();
+		}
+		// Direct presence of @Valid ?
 		Class<? extends Annotation> annotationType = ann.annotationType();
-		String annotationName = annotationType.getName();
-		if ("javax.validation.Valid".equals(annotationName)) {
+		if ("javax.validation.Valid".equals(annotationType.getName())) {
 			return EMPTY_OBJECT_ARRAY;
 		}
+		// Meta presence of @Validated ?
 		Validated validatedAnn = AnnotationUtils.getAnnotation(ann, Validated.class);
 		if (validatedAnn != null) {
-			Object hints = validatedAnn.value();
-			return convertValidationHints(hints);
+			return validatedAnn.value();
 		}
+		// Custom validation annotation ?
 		if (annotationType.getSimpleName().startsWith("Valid")) {
-			Object hints = AnnotationUtils.getValue(ann);
-			return convertValidationHints(hints);
+			return convertValidationHints(AnnotationUtils.getValue(ann));
 		}
+		// No validation triggered
 		return null;
 	}
 

spring-context/src/main/kotlin/org/springframework/context/support/BeanDefinitionDsl.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -108,7 +108,7 @@ open class BeanDefinitionDsl internal constructor (private val init: BeanDefinit
 		SINGLETON,
 
 		/**
-		 * Scope constant for the standard singleton scope
+		 * Scope constant for the standard prototype scope
 		 * @see org.springframework.beans.factory.config.BeanDefinition.SCOPE_PROTOTYPE
 		 */
 		PROTOTYPE

spring-context/src/test/java/org/springframework/aop/framework/CglibProxyTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,6 +28,7 @@ import org.springframework.aop.MethodMatcher;
 import org.springframework.aop.Pointcut;
 import org.springframework.aop.support.AopUtils;
 import org.springframework.aop.support.DefaultPointcutAdvisor;
+import org.springframework.aop.support.annotation.AnnotationMatchingPointcut;
 import org.springframework.aop.testfixture.advice.CountingBeforeAdvice;
 import org.springframework.aop.testfixture.interceptor.NopInterceptor;
 import org.springframework.beans.testfixture.beans.ITestBean;
@@ -35,6 +36,8 @@ import org.springframework.beans.testfixture.beans.TestBean;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextException;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
+import org.springframework.lang.NonNull;
+import org.springframework.lang.Nullable;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
@@ -87,8 +90,7 @@ public class CglibProxyTests extends AbstractAopProxyTests implements Serializab
 		AdvisedSupport pc = new AdvisedSupport(ITestBean.class);
 		pc.addAdvice(new NopInterceptor());
 		AopProxy aop = createAopProxy(pc);
-		assertThatExceptionOfType(AopConfigException.class).isThrownBy(
-				aop::getProxy);
+		assertThatExceptionOfType(AopConfigException.class).isThrownBy(aop::getProxy);
 	}
 
 	@Test
@@ -136,8 +138,8 @@ public class CglibProxyTests extends AbstractAopProxyTests implements Serializab
 
 		Object proxy = aop.getProxy();
 		assertThat(AopUtils.isCglibProxy(proxy)).isTrue();
-		assertThat(proxy instanceof ITestBean).isTrue();
-		assertThat(proxy instanceof TestBean).isTrue();
+		assertThat(proxy).isInstanceOf(ITestBean.class);
+		assertThat(proxy).isInstanceOf(TestBean.class);
 
 		TestBean tb = (TestBean) proxy;
 		assertThat(tb.getAge()).isEqualTo(32);
@@ -304,6 +306,8 @@ public class CglibProxyTests extends AbstractAopProxyTests implements Serializab
 		CglibAopProxy cglib = new CglibAopProxy(as);
 
 		ITestBean proxy1 = (ITestBean) cglib.getProxy();
+		ITestBean proxy1a = (ITestBean) cglib.getProxy();
+		assertThat(proxy1a.getClass()).isSameAs(proxy1.getClass());
 
 		mockTargetSource.setTarget(proxy1);
 		as = new AdvisedSupport(new Class<?>[]{});
@@ -312,7 +316,40 @@ public class CglibProxyTests extends AbstractAopProxyTests implements Serializab
 		cglib = new CglibAopProxy(as);
 
 		ITestBean proxy2 = (ITestBean) cglib.getProxy();
-		assertThat(proxy2 instanceof Serializable).isTrue();
+		assertThat(proxy2).isInstanceOf(Serializable.class);
+		assertThat(proxy2.getClass()).isNotSameAs(proxy1.getClass());
+
+		ITestBean proxy2a = (ITestBean) cglib.getProxy();
+		assertThat(proxy2a).isInstanceOf(Serializable.class);
+		assertThat(proxy2a.getClass()).isSameAs(proxy2.getClass());
+
+		mockTargetSource.setTarget(proxy1);
+		as = new AdvisedSupport(new Class<?>[]{});
+		as.setTargetSource(mockTargetSource);
+		as.addAdvisor(new DefaultPointcutAdvisor(new AnnotationMatchingPointcut(Nullable.class), new NopInterceptor()));
+		cglib = new CglibAopProxy(as);
+
+		ITestBean proxy3 = (ITestBean) cglib.getProxy();
+		assertThat(proxy3).isInstanceOf(Serializable.class);
+		assertThat(proxy3.getClass()).isNotSameAs(proxy2.getClass());
+
+		ITestBean proxy3a = (ITestBean) cglib.getProxy();
+		assertThat(proxy3a).isInstanceOf(Serializable.class);
+		assertThat(proxy3a.getClass()).isSameAs(proxy3.getClass());
+
+		mockTargetSource.setTarget(proxy1);
+		as = new AdvisedSupport(new Class<?>[]{});
+		as.setTargetSource(mockTargetSource);
+		as.addAdvisor(new DefaultPointcutAdvisor(new AnnotationMatchingPointcut(NonNull.class), new NopInterceptor()));
+		cglib = new CglibAopProxy(as);
+
+		ITestBean proxy4 = (ITestBean) cglib.getProxy();
+		assertThat(proxy4).isInstanceOf(Serializable.class);
+		assertThat(proxy4.getClass()).isNotSameAs(proxy3.getClass());
+
+		ITestBean proxy4a = (ITestBean) cglib.getProxy();
+		assertThat(proxy4a).isInstanceOf(Serializable.class);
+		assertThat(proxy4a.getClass()).isSameAs(proxy4.getClass());
 	}
 
 	@Test
@@ -331,7 +368,7 @@ public class CglibProxyTests extends AbstractAopProxyTests implements Serializab
 			proxy.doTest();
 		}
 		catch (Exception ex) {
-			assertThat(ex instanceof ApplicationContextException).as("Invalid exception class").isTrue();
+			assertThat(ex).as("Invalid exception class").isInstanceOf(ApplicationContextException.class);
 		}
 
 		assertThat(proxy.isCatchInvoked()).as("Catch was not invoked").isTrue();

spring-context/src/test/java/org/springframework/aop/framework/ProxyFactoryBeanTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -92,7 +92,7 @@ public class ProxyFactoryBeanTests {
 
 
 	@BeforeEach
-	public void setUp() throws Exception {
+	public void setup() throws Exception {
 		DefaultListableBeanFactory parent = new DefaultListableBeanFactory();
 		parent.registerBeanDefinition("target2", new RootBeanDefinition(TestApplicationListener.class));
 		this.factory = new DefaultListableBeanFactory(parent);
@@ -139,22 +139,24 @@ public class ProxyFactoryBeanTests {
 	private void testDoubleTargetSourceIsRejected(String name) {
 		DefaultListableBeanFactory bf = new DefaultListableBeanFactory();
 		new XmlBeanDefinitionReader(bf).loadBeanDefinitions(new ClassPathResource(DBL_TARGETSOURCE_CONTEXT, CLASS));
+
 		assertThatExceptionOfType(BeanCreationException.class).as("Should not allow TargetSource to be specified in interceptorNames as well as targetSource property")
-			.isThrownBy(() -> bf.getBean(name))
-			.havingCause()
-			.isInstanceOf(AopConfigException.class)
-			.withMessageContaining("TargetSource");
+				.isThrownBy(() -> bf.getBean(name))
+				.havingCause()
+				.isInstanceOf(AopConfigException.class)
+				.withMessageContaining("TargetSource");
 	}
 
 	@Test
 	public void testTargetSourceNotAtEndOfInterceptorNamesIsRejected() {
 		DefaultListableBeanFactory bf = new DefaultListableBeanFactory();
 		new XmlBeanDefinitionReader(bf).loadBeanDefinitions(new ClassPathResource(NOTLAST_TARGETSOURCE_CONTEXT, CLASS));
+
 		assertThatExceptionOfType(BeanCreationException.class).as("TargetSource or non-advised object must be last in interceptorNames")
-			.isThrownBy(() -> bf.getBean("targetSourceNotLast"))
-			.havingCause()
-			.isInstanceOf(AopConfigException.class)
-			.withMessageContaining("interceptorNames");
+				.isThrownBy(() -> bf.getBean("targetSourceNotLast"))
+				.havingCause()
+				.isInstanceOf(AopConfigException.class)
+				.withMessageContaining("interceptorNames");
 	}
 
 	@Test
@@ -167,11 +169,11 @@ public class ProxyFactoryBeanTests {
 		assertThat(cba.getCalls()).isEqualTo(0);
 
 		ITestBean tb = (ITestBean) bf.getBean("directTarget");
-		assertThat(tb.getName().equals("Adam")).isTrue();
+		assertThat(tb.getName()).isEqualTo("Adam");
 		assertThat(cba.getCalls()).isEqualTo(1);
 
 		ProxyFactoryBean pfb = (ProxyFactoryBean) bf.getBean("&directTarget");
-		assertThat(TestBean.class.isAssignableFrom(pfb.getObjectType())).as("Has correct object type").isTrue();
+		assertThat(pfb.getObjectType()).isAssignableTo(TestBean.class);
 	}
 
 	@Test
@@ -179,9 +181,9 @@ public class ProxyFactoryBeanTests {
 		DefaultListableBeanFactory bf = new DefaultListableBeanFactory();
 		new XmlBeanDefinitionReader(bf).loadBeanDefinitions(new ClassPathResource(TARGETSOURCE_CONTEXT, CLASS));
 		ITestBean tb = (ITestBean) bf.getBean("viaTargetSource");
-		assertThat(tb.getName().equals("Adam")).isTrue();
+		assertThat(tb.getName()).isEqualTo("Adam");
 		ProxyFactoryBean pfb = (ProxyFactoryBean) bf.getBean("&viaTargetSource");
-		assertThat(TestBean.class.isAssignableFrom(pfb.getObjectType())).as("Has correct object type").isTrue();
+		assertThat(pfb.getObjectType()).isAssignableTo(TestBean.class);
 	}
 
 	@Test
@@ -190,11 +192,15 @@ public class ProxyFactoryBeanTests {
 		new XmlBeanDefinitionReader(bf).loadBeanDefinitions(new ClassPathResource(TARGETSOURCE_CONTEXT, CLASS));
 
 		ITestBean tb = (ITestBean) bf.getBean("noTarget");
-		assertThatExceptionOfType(UnsupportedOperationException.class).isThrownBy(() ->
-				tb.getName())
-			.withMessage("getName");
+		assertThatExceptionOfType(UnsupportedOperationException.class).isThrownBy(tb::getName).withMessage("getName");
 		FactoryBean<?> pfb = (ProxyFactoryBean) bf.getBean("&noTarget");
-		assertThat(ITestBean.class.isAssignableFrom(pfb.getObjectType())).as("Has correct object type").isTrue();
+		assertThat(pfb.getObjectType()).isAssignableTo(ITestBean.class);
+	}
+
+	@Test
+	public void testGetObjectTypeOnUninitializedFactoryBean() {
+		ProxyFactoryBean pfb = new ProxyFactoryBean();
+		assertThat(pfb.getObjectType()).isNull();
 	}
 
 	/**
@@ -219,20 +225,20 @@ public class ProxyFactoryBeanTests {
 		pc1.addAdvice(1, di);
 		assertThat(pc2.getAdvisors()).isEqualTo(pc1.getAdvisors());
 		assertThat(pc2.getAdvisors().length).as("Now have one more advisor").isEqualTo((oldLength + 1));
-		assertThat(0).isEqualTo(di.getCount());
+		assertThat(di.getCount()).isEqualTo(0);
 		test1.setAge(5);
 		assertThat(test1.getAge()).isEqualTo(test1_1.getAge());
-		assertThat(3).isEqualTo(di.getCount());
+		assertThat(di.getCount()).isEqualTo(3);
 	}
 
 	@Test
 	public void testPrototypeInstancesAreNotEqual() {
-		assertThat(ITestBean.class.isAssignableFrom(factory.getType("prototype"))).as("Has correct object type").isTrue();
+		assertThat(factory.getType("prototype")).isAssignableTo(ITestBean.class);
 		ITestBean test2 = (ITestBean) factory.getBean("prototype");
 		ITestBean test2_1 = (ITestBean) factory.getBean("prototype");
-		assertThat(test2 != test2_1).as("Prototype instances !=").isTrue();
-		assertThat(test2.equals(test2_1)).as("Prototype instances equal").isTrue();
-		assertThat(ITestBean.class.isAssignableFrom(factory.getType("prototype"))).as("Has correct object type").isTrue();
+		assertThat(test2).as("Prototype instances !=").isNotSameAs(test2_1);
+		assertThat(test2).as("Prototype instances equal").isEqualTo(test2_1);
+		assertThat(factory.getType("prototype")).isAssignableTo(ITestBean.class);
 	}
 
 	/**
@@ -262,7 +268,7 @@ public class ProxyFactoryBeanTests {
 		assertThat(prototype2FirstInstance.getCount()).isEqualTo(INITIAL_COUNT + 1);
 
 		SideEffectBean prototype2SecondInstance = (SideEffectBean) bf.getBean(beanName);
-		assertThat(prototype2FirstInstance == prototype2SecondInstance).as("Prototypes are not ==").isFalse();
+		assertThat(prototype2FirstInstance).as("Prototypes are not ==").isNotSameAs(prototype2SecondInstance);
 		assertThat(prototype2SecondInstance.getCount()).isEqualTo(INITIAL_COUNT);
 		assertThat(prototype2FirstInstance.getCount()).isEqualTo(INITIAL_COUNT + 1);
 
@@ -285,19 +291,19 @@ public class ProxyFactoryBeanTests {
 		TestBean target = (TestBean) factory.getBean("test");
 		target.setName(name);
 		ITestBean autoInvoker = (ITestBean) factory.getBean("autoInvoker");
-		assertThat(autoInvoker.getName().equals(name)).isTrue();
+		assertThat(autoInvoker.getName()).isEqualTo(name);
 	}
 
 	@Test
 	public void testCanGetFactoryReferenceAndManipulate() {
 		ProxyFactoryBean config = (ProxyFactoryBean) factory.getBean("&test1");
-		assertThat(ITestBean.class.isAssignableFrom(config.getObjectType())).as("Has correct object type").isTrue();
-		assertThat(ITestBean.class.isAssignableFrom(factory.getType("test1"))).as("Has correct object type").isTrue();
+		assertThat(config.getObjectType()).isAssignableTo(ITestBean.class);
+		assertThat(factory.getType("test1")).isAssignableTo(ITestBean.class);
 		// Trigger lazy initialization.
 		config.getObject();
 		assertThat(config.getAdvisors().length).as("Have one advisors").isEqualTo(1);
-		assertThat(ITestBean.class.isAssignableFrom(config.getObjectType())).as("Has correct object type").isTrue();
-		assertThat(ITestBean.class.isAssignableFrom(factory.getType("test1"))).as("Has correct object type").isTrue();
+		assertThat(config.getObjectType()).isAssignableTo(ITestBean.class);
+		assertThat(factory.getType("test1")).isAssignableTo(ITestBean.class);
 
 		ITestBean tb = (ITestBean) factory.getBean("test1");
 		// no exception
@@ -308,7 +314,7 @@ public class ProxyFactoryBeanTests {
 		config.addAdvice(0, (MethodInterceptor) invocation -> {
 			throw ex;
 		});
-		assertThat(config.getAdvisors().length).as("Have correct advisor count").isEqualTo(2);
+		assertThat(config.getAdvisors()).as("Have correct advisor count").hasSize(2);
 
 		ITestBean tb1 = (ITestBean) factory.getBean("test1");
 		assertThatException()
@@ -348,31 +354,31 @@ public class ProxyFactoryBeanTests {
 		// Add to head of interceptor chain
 		int oldCount = config.getAdvisors().length;
 		config.addAdvisor(0, new DefaultIntroductionAdvisor(ti, TimeStamped.class));
-		assertThat(config.getAdvisors().length == oldCount + 1).isTrue();
+		assertThat(config.getAdvisors()).hasSize(oldCount + 1);
 
 		TimeStamped ts = (TimeStamped) factory.getBean("test2");
 		assertThat(ts.getTimeStamp()).isEqualTo(time);
 
 		// Can remove
 		config.removeAdvice(ti);
-		assertThat(config.getAdvisors().length == oldCount).isTrue();
+		assertThat(config.getAdvisors()).hasSize(oldCount);
 
 		// Check no change on existing object reference
-		assertThat(ts.getTimeStamp() == time).isTrue();
+		assertThat(ts.getTimeStamp()).isEqualTo(time);
 
 		assertThat(factory.getBean("test2")).as("Should no longer implement TimeStamped")
 				.isNotInstanceOf(TimeStamped.class);
 
 		// Now check non-effect of removing interceptor that isn't there
 		config.removeAdvice(new DebugInterceptor());
-		assertThat(config.getAdvisors().length == oldCount).isTrue();
+		assertThat(config.getAdvisors()).hasSize(oldCount);
 
 		ITestBean it = (ITestBean) ts;
 		DebugInterceptor debugInterceptor = new DebugInterceptor();
 		config.addAdvice(0, debugInterceptor);
 		it.getSpouse();
 		// Won't affect existing reference
-		assertThat(debugInterceptor.getCount() == 0).isTrue();
+		assertThat(debugInterceptor.getCount()).isEqualTo(0);
 		it = (ITestBean) factory.getBean("test2");
 		it.getSpouse();
 		assertThat(debugInterceptor.getCount()).isEqualTo(1);
@@ -412,16 +418,16 @@ public class ProxyFactoryBeanTests {
 	public void testMethodPointcuts() {
 		ITestBean tb = (ITestBean) factory.getBean("pointcuts");
 		PointcutForVoid.reset();
-		assertThat(PointcutForVoid.methodNames.isEmpty()).as("No methods intercepted").isTrue();
+		assertThat(PointcutForVoid.methodNames).as("No methods intercepted").isEmpty();
 		tb.getAge();
-		assertThat(PointcutForVoid.methodNames.isEmpty()).as("Not void: shouldn't have intercepted").isTrue();
+		assertThat(PointcutForVoid.methodNames).as("Not void: shouldn't have intercepted").isEmpty();
 		tb.setAge(1);
 		tb.getAge();
 		tb.setName("Tristan");
 		tb.toString();
-		assertThat(PointcutForVoid.methodNames.size()).as("Recorded wrong number of invocations").isEqualTo(2);
-		assertThat(PointcutForVoid.methodNames.get(0).equals("setAge")).isTrue();
-		assertThat(PointcutForVoid.methodNames.get(1).equals("setName")).isTrue();
+		assertThat(PointcutForVoid.methodNames).as("Recorded wrong number of invocations").hasSize(2);
+		assertThat(PointcutForVoid.methodNames.get(0)).isEqualTo("setAge");
+		assertThat(PointcutForVoid.methodNames.get(1)).isEqualTo("setName");
 	}
 
 	@Test
@@ -498,17 +504,17 @@ public class ProxyFactoryBeanTests {
 	@Test
 	public void testGlobalsCanAddAspectInterfaces() {
 		AddedGlobalInterface agi = (AddedGlobalInterface) factory.getBean("autoInvoker");
-		assertThat(agi.globalsAdded() == -1).isTrue();
+		assertThat(agi.globalsAdded()).isEqualTo(-1);
 
 		ProxyFactoryBean pfb = (ProxyFactoryBean) factory.getBean("&validGlobals");
 		// Trigger lazy initialization.
 		pfb.getObject();
 		// 2 globals + 2 explicit
-		assertThat(pfb.getAdvisors().length).as("Have 2 globals and 2 explicit advisors").isEqualTo(3);
+		assertThat(pfb.getAdvisors()).as("Have 2 globals and 2 explicit advisors").hasSize(3);
 
 		ApplicationListener<?> l = (ApplicationListener<?>) factory.getBean("validGlobals");
 		agi = (AddedGlobalInterface) l;
-		assertThat(agi.globalsAdded() == -1).isTrue();
+		assertThat(agi.globalsAdded()).isEqualTo(-1);
 
 		assertThat(factory.getBean("test1")).as("Aspect interface shouldn't be implemented without globals")
 				.isNotInstanceOf(AddedGlobalInterface.class);
@@ -709,6 +715,7 @@ public class ProxyFactoryBeanTests {
 		}
 	}
 
+
 	/**
 	 * Aspect interface
 	 */

spring-context/src/test/java/org/springframework/cache/CacheReproTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -118,6 +118,7 @@ class CacheReproTests {
 		assertThat(cacheResolver.getCache("foo").get("foo")).isNull();
 		Object result = bean.getSimple("foo");  // cache name = id
 		assertThat(cacheResolver.getCache("foo").get("foo").get()).isEqualTo(result);
+
 		context.close();
 	}
 
@@ -127,7 +128,7 @@ class CacheReproTests {
 		Spr13081Service bean = context.getBean(Spr13081Service.class);
 
 		assertThatIllegalStateException().isThrownBy(() -> bean.getSimple(null))
-			.withMessageContaining(MyCacheResolver.class.getName());
+				.withMessageContaining(MyCacheResolver.class.getName());
 		context.close();
 	}
 
@@ -146,6 +147,7 @@ class CacheReproTests {
 		TestBean tb2 = bean.findById("tb1").get();
 		assertThat(tb2).isNotSameAs(tb);
 		assertThat(cache.get("tb1").get()).isSameAs(tb2);
+
 		context.close();
 	}
 
@@ -177,6 +179,7 @@ class CacheReproTests {
 		bean.insertItem(tb);
 		assertThat(bean.findById("tb1").get()).isSameAs(tb);
 		assertThat(cache.get("tb1").get()).isSameAs(tb);
+
 		context.close();
 	}
 
@@ -190,6 +193,7 @@ class CacheReproTests {
 		bean.insertItem(tb);
 		assertThat(bean.findById("tb1").get()).isSameAs(tb);
 		assertThat(cache.get("tb1").get()).isSameAs(tb);
+
 		context.close();
 	}
 

spring-context/src/test/java/org/springframework/cache/interceptor/CacheSyncFailureTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,8 +48,9 @@ public class CacheSyncFailureTests {
 
 	private SimpleService simpleService;
 
+
 	@BeforeEach
-	public void setUp() {
+	public void setup() {
 		this.context = new AnnotationConfigApplicationContext(Config.class);
 		this.simpleService = this.context.getBean(SimpleService.class);
 	}
@@ -61,39 +62,40 @@ public class CacheSyncFailureTests {
 		}
 	}
 
+
 	@Test
 	public void unlessSync() {
-		assertThatIllegalStateException().isThrownBy(() ->
-				this.simpleService.unlessSync("key"))
-			.withMessageContaining("@Cacheable(sync=true) does not support unless attribute");
+		assertThatIllegalStateException()
+				.isThrownBy(() -> this.simpleService.unlessSync("key"))
+				.withMessageContaining("A sync=true operation does not support the unless attribute");
 	}
 
 	@Test
 	public void severalCachesSync() {
-		assertThatIllegalStateException().isThrownBy(() ->
-				this.simpleService.severalCachesSync("key"))
-			.withMessageContaining("@Cacheable(sync=true) only allows a single cache");
+		assertThatIllegalStateException()
+				.isThrownBy(() -> this.simpleService.severalCachesSync("key"))
+				.withMessageContaining("A sync=true operation is restricted to a single cache");
 	}
 
 	@Test
 	public void severalCachesWithResolvedSync() {
-		assertThatIllegalStateException().isThrownBy(() ->
-				this.simpleService.severalCachesWithResolvedSync("key"))
-			.withMessageContaining("@Cacheable(sync=true) only allows a single cache");
+		assertThatIllegalStateException()
+				.isThrownBy(() -> this.simpleService.severalCachesWithResolvedSync("key"))
+				.withMessageContaining("A sync=true operation is restricted to a single cache");
 	}
 
 	@Test
 	public void syncWithAnotherOperation() {
-		assertThatIllegalStateException().isThrownBy(() ->
-				this.simpleService.syncWithAnotherOperation("key"))
-			.withMessageContaining("@Cacheable(sync=true) cannot be combined with other cache operations");
+		assertThatIllegalStateException()
+				.isThrownBy(() -> this.simpleService.syncWithAnotherOperation("key"))
+				.withMessageContaining("A sync=true operation cannot be combined with other cache operations");
 	}
 
 	@Test
 	public void syncWithTwoGetOperations() {
-		assertThatIllegalStateException().isThrownBy(() ->
-				this.simpleService.syncWithTwoGetOperations("key"))
-			.withMessageContaining("Only one @Cacheable(sync=true) entry is allowed");
+		assertThatIllegalStateException()
+				.isThrownBy(() -> this.simpleService.syncWithTwoGetOperations("key"))
+				.withMessageContaining("Only one sync=true operation is allowed");
 	}
 
 
@@ -131,6 +133,7 @@ public class CacheSyncFailureTests {
 		}
 	}
 
+
 	@Configuration
 	@EnableCaching
 	static class Config implements CachingConfigurer {

spring-context/src/test/java/org/springframework/context/annotation/ClassPathBeanDefinitionScannerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -197,6 +197,7 @@ public class ClassPathBeanDefinitionScannerTests {
 		context.registerBeanDefinition("stubFooDao", new RootBeanDefinition(TestBean.class));
 		ClassPathBeanDefinitionScanner scanner = new ClassPathBeanDefinitionScanner(context);
 		scanner.setIncludeAnnotationConfig(false);
+
 		// should not fail!
 		scanner.scan(BASE_PACKAGE);
 	}
@@ -207,10 +208,10 @@ public class ClassPathBeanDefinitionScannerTests {
 		ClassPathBeanDefinitionScanner scanner = new ClassPathBeanDefinitionScanner(context);
 		scanner.setIncludeAnnotationConfig(false);
 		scanner.scan("org.springframework.context.annotation3");
-		assertThatIllegalStateException().isThrownBy(() ->
-				scanner.scan(BASE_PACKAGE))
-			.withMessageContaining("stubFooDao")
-			.withMessageContaining(StubFooDao.class.getName());
+
+		assertThatIllegalStateException().isThrownBy(() -> scanner.scan(BASE_PACKAGE))
+				.withMessageContaining("stubFooDao")
+				.withMessageContaining(StubFooDao.class.getName());
 	}
 
 	@Test
@@ -267,11 +268,10 @@ public class ClassPathBeanDefinitionScannerTests {
 		ClassPathBeanDefinitionScanner scanner = new ClassPathBeanDefinitionScanner(context);
 		scanner.setIncludeAnnotationConfig(false);
 		scanner.scan("org.springframework.context.annotation2");
-		assertThatIllegalStateException().isThrownBy(() ->
-				scanner.scan(BASE_PACKAGE))
-			.withMessageContaining("myNamedDao")
-			.withMessageContaining(NamedStubDao.class.getName())
-			.withMessageContaining(NamedStubDao2.class.getName());
+		assertThatIllegalStateException().isThrownBy(() -> scanner.scan(BASE_PACKAGE))
+				.withMessageContaining("myNamedDao")
+				.withMessageContaining(NamedStubDao.class.getName())
+				.withMessageContaining(NamedStubDao2.class.getName());
 	}
 
 	@Test

spring-context/src/test/java/org/springframework/context/annotation/CommonAnnotationBeanPostProcessorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -215,7 +215,7 @@ public class CommonAnnotationBeanPostProcessorTests {
 		bf.registerBeanDefinition("testBean4", tbd);
 
 		bf.registerResolvableDependency(BeanFactory.class, bf);
-		bf.registerResolvableDependency(INestedTestBean.class, (ObjectFactory<Object>) () -> new NestedTestBean());
+		bf.registerResolvableDependency(INestedTestBean.class, (ObjectFactory<Object>) NestedTestBean::new);
 
 		@SuppressWarnings("deprecation")
 		org.springframework.beans.factory.config.PropertyPlaceholderConfigurer ppc = new org.springframework.beans.factory.config.PropertyPlaceholderConfigurer();
@@ -233,7 +233,7 @@ public class CommonAnnotationBeanPostProcessorTests {
 		assertThat(tb).isNotSameAs(anotherBean.getTestBean6());
 
 		String[] depBeans = bf.getDependenciesForBean("annotatedBean");
-		assertThat(depBeans.length).isEqualTo(1);
+		assertThat(depBeans).hasSize(1);
 		assertThat(depBeans[0]).isEqualTo("testBean4");
 	}
 
@@ -508,6 +508,25 @@ public class CommonAnnotationBeanPostProcessorTests {
 		assertThat(tb.getName()).isEqualTo("notLazyAnymore");
 	}
 
+	@Test
+	public void testLazyResolutionWithFallbackTypeMatch() {
+		DefaultListableBeanFactory bf = new DefaultListableBeanFactory();
+		bf.setAutowireCandidateResolver(new ContextAnnotationAutowireCandidateResolver());
+		CommonAnnotationBeanPostProcessor bpp = new CommonAnnotationBeanPostProcessor();
+		bpp.setBeanFactory(bf);
+		bf.addBeanPostProcessor(bpp);
+
+		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(LazyResourceCglibInjectionBean.class));
+		bf.registerBeanDefinition("tb", new RootBeanDefinition(TestBean.class));
+
+		LazyResourceCglibInjectionBean bean = (LazyResourceCglibInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bf.containsSingleton("tb")).isFalse();
+		bean.testBean.setName("notLazyAnymore");
+		assertThat(bf.containsSingleton("tb")).isTrue();
+		TestBean tb = (TestBean) bf.getBean("tb");
+		assertThat(tb.getName()).isEqualTo("notLazyAnymore");
+	}
+
 
 	public static class AnnotatedInitDestroyBean {
 

spring-context/src/test/java/org/springframework/context/annotation/EnableLoadTimeWeavingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -79,7 +79,7 @@ class EnableLoadTimeWeavingTests {
 
 
 	@Configuration
-	@EnableLoadTimeWeaving(aspectjWeaving=AspectJWeaving.DISABLED)
+	@EnableLoadTimeWeaving(aspectjWeaving = AspectJWeaving.DISABLED)
 	static class EnableLTWConfig_withAjWeavingDisabled implements LoadTimeWeavingConfigurer {
 
 		@Override
@@ -88,8 +88,9 @@ class EnableLoadTimeWeavingTests {
 		}
 	}
 
+
 	@Configuration
-	@EnableLoadTimeWeaving(aspectjWeaving=AspectJWeaving.AUTODETECT)
+	@EnableLoadTimeWeaving(aspectjWeaving = AspectJWeaving.AUTODETECT)
 	static class EnableLTWConfig_withAjWeavingAutodetect implements LoadTimeWeavingConfigurer {
 
 		@Override
@@ -98,8 +99,9 @@ class EnableLoadTimeWeavingTests {
 		}
 	}
 
+
 	@Configuration
-	@EnableLoadTimeWeaving(aspectjWeaving=AspectJWeaving.ENABLED)
+	@EnableLoadTimeWeaving(aspectjWeaving = AspectJWeaving.ENABLED)
 	static class EnableLTWConfig_withAjWeavingEnabled implements LoadTimeWeavingConfigurer {
 
 		@Override

spring-context/src/test/java/org/springframework/context/annotation/configuration/ImportTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,6 +41,7 @@ class ImportTests {
 
 	private DefaultListableBeanFactory processConfigurationClasses(Class<?>... classes) {
 		DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
+		beanFactory.setAllowBeanDefinitionOverriding(false);
 		for (Class<?> clazz : classes) {
 			beanFactory.registerBeanDefinition(clazz.getSimpleName(), new RootBeanDefinition(clazz));
 		}
@@ -56,9 +57,10 @@ class ImportTests {
 		for (Class<?> clazz : classes) {
 			beanFactory.getBean(clazz);
 		}
-
 	}
 
+	// ------------------------------------------------------------------------
+
 	@Test
 	void testProcessImportsWithAsm() {
 		int configClasses = 2;
@@ -158,6 +160,13 @@ class ImportTests {
 		assertBeanDefinitionCount(configClasses + beansInClasses, FirstLevel.class);
 	}
 
+	@Test
+	void testImportAnnotationWithThreeLevelRecursionAndDoubleImport() {
+		int configClasses = 5;
+		int beansInClasses = 5;
+		assertBeanDefinitionCount(configClasses + beansInClasses, FirstLevel.class, FirstLevelPlus.class);
+	}
+
 	// ------------------------------------------------------------------------
 
 	@Test
@@ -167,7 +176,6 @@ class ImportTests {
 		assertBeanDefinitionCount((configClasses + beansInClasses), WithMultipleArgumentsToImportAnnotation.class);
 	}
 
-
 	@Test
 	void testImportAnnotationWithMultipleArgumentsResultingInOverriddenBeanDefinition() {
 		DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
@@ -245,6 +253,11 @@ class ImportTests {
 		}
 	}
 
+	@Configuration
+	@Import(ThirdLevel.class)
+	static class FirstLevelPlus {
+	}
+
 	@Configuration
 	@Import({ThirdLevel.class, InitBean.class})
 	static class SecondLevel {

spring-context/src/test/java/org/springframework/context/event/AbstractApplicationEventListenerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,6 +36,10 @@ public abstract class AbstractApplicationEventListenerTests {
 		}
 	}
 
+	protected <T> GenericTestEvent<T> createGenericTestEvent(T payload) {
+		return new GenericTestEvent<>(this, payload);
+	}
+
 
 	protected static class GenericTestEvent<T> extends ApplicationEvent {
 
@@ -51,6 +55,7 @@ public abstract class AbstractApplicationEventListenerTests {
 		}
 	}
 
+
 	protected static class SmartGenericTestEvent<T> extends GenericTestEvent<T> implements ResolvableTypeProvider {
 
 		private final ResolvableType resolvableType;
@@ -67,6 +72,7 @@ public abstract class AbstractApplicationEventListenerTests {
 		}
 	}
 
+
 	protected static class StringEvent extends GenericTestEvent<String> {
 
 		public StringEvent(Object source, String payload) {
@@ -74,6 +80,7 @@ public abstract class AbstractApplicationEventListenerTests {
 		}
 	}
 
+
 	protected static class LongEvent extends GenericTestEvent<Long> {
 
 		public LongEvent(Object source, Long payload) {
@@ -81,31 +88,31 @@ public abstract class AbstractApplicationEventListenerTests {
 		}
 	}
 
-	protected <T> GenericTestEvent<T> createGenericTestEvent(T payload) {
-		return new GenericTestEvent<>(this, payload);
-	}
-
 
 	static class GenericEventListener implements ApplicationListener<GenericTestEvent<?>> {
+
 		@Override
 		public void onApplicationEvent(GenericTestEvent<?> event) {
 		}
 	}
 
+
 	static class ObjectEventListener implements ApplicationListener<GenericTestEvent<Object>> {
+
 		@Override
 		public void onApplicationEvent(GenericTestEvent<Object> event) {
 		}
 	}
 
-	static class UpperBoundEventListener
-			implements ApplicationListener<GenericTestEvent<? extends RuntimeException>> {
+
+	static class UpperBoundEventListener implements ApplicationListener<GenericTestEvent<? extends RuntimeException>> {
 
 		@Override
 		public void onApplicationEvent(GenericTestEvent<? extends RuntimeException> event) {
 		}
 	}
 
+
 	static class StringEventListener implements ApplicationListener<GenericTestEvent<String>> {
 
 		@Override
@@ -113,6 +120,7 @@ public abstract class AbstractApplicationEventListenerTests {
 		}
 	}
 
+
 	@SuppressWarnings("rawtypes")
 	static class RawApplicationListener implements ApplicationListener {
 
@@ -121,10 +129,10 @@ public abstract class AbstractApplicationEventListenerTests {
 		}
 	}
 
+
 	static class TestEvents {
 
 		public GenericTestEvent<?> wildcardEvent;
-
 	}
 
 }

spring-context/src/test/java/org/springframework/context/event/AnnotationDrivenEventListenerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -164,12 +164,12 @@ class AnnotationDrivenEventListenerTests {
 		ContextEventListener listener = this.context.getBean(ContextEventListener.class);
 
 		List<Object> events = this.eventCollector.getEvents(listener);
-		assertThat(events.size()).as("Wrong number of initial context events").isEqualTo(1);
+		assertThat(events).as("Wrong number of initial context events").hasSize(1);
 		assertThat(events.get(0).getClass()).isEqualTo(ContextRefreshedEvent.class);
 
 		this.context.stop();
 		List<Object> eventsAfterStop = this.eventCollector.getEvents(listener);
-		assertThat(eventsAfterStop.size()).as("Wrong number of context events on shutdown").isEqualTo(2);
+		assertThat(eventsAfterStop).as("Wrong number of context events on shutdown").hasSize(2);
 		assertThat(eventsAfterStop.get(1).getClass()).isEqualTo(ContextStoppedEvent.class);
 		this.eventCollector.assertTotalEventsCount(2);
 	}
@@ -334,7 +334,7 @@ class AnnotationDrivenEventListenerTests {
 		load(ScopedProxyTestBean.class);
 
 		SimpleService proxy = this.context.getBean(SimpleService.class);
-		assertThat(proxy instanceof Advised).as("bean should be a proxy").isTrue();
+		assertThat(proxy).as("bean should be a proxy").isInstanceOf(Advised.class);
 		this.eventCollector.assertNoEventReceived(proxy.getId());
 
 		this.context.publishEvent(new ContextRefreshedEvent(this.context));
@@ -351,7 +351,7 @@ class AnnotationDrivenEventListenerTests {
 		load(AnnotatedProxyTestBean.class);
 
 		AnnotatedSimpleService proxy = this.context.getBean(AnnotatedSimpleService.class);
-		assertThat(proxy instanceof Advised).as("bean should be a proxy").isTrue();
+		assertThat(proxy).as("bean should be a proxy").isInstanceOf(Advised.class);
 		this.eventCollector.assertNoEventReceived(proxy.getId());
 
 		this.context.publishEvent(new ContextRefreshedEvent(this.context));
@@ -517,7 +517,6 @@ class AnnotationDrivenEventListenerTests {
 		ReplyEventListener replyEventListener = this.context.getBean(ReplyEventListener.class);
 		TestEventListener listener = this.context.getBean(TestEventListener.class);
 
-
 		this.eventCollector.assertNoEventReceived(listener);
 		this.eventCollector.assertNoEventReceived(replyEventListener);
 		this.context.publishEvent(event);
@@ -634,6 +633,17 @@ class AnnotationDrivenEventListenerTests {
 		assertThat(listener.order).contains("first", "second", "third");
 	}
 
+	@Test
+	void publicSubclassWithInheritedEventListener() {
+		load(PublicSubclassWithInheritedEventListener.class);
+		TestEventListener listener = this.context.getBean(PublicSubclassWithInheritedEventListener.class);
+
+		this.eventCollector.assertNoEventReceived(listener);
+		this.context.publishEvent("test");
+		this.eventCollector.assertEvent(listener, "test");
+		this.eventCollector.assertTotalEventsCount(1);
+	}
+
 	@Test @Disabled  // SPR-15122
 	void listenersReceiveEarlyEvents() {
 		load(EventOnPostConstruct.class, OrderedTestListener.class);
@@ -646,7 +656,7 @@ class AnnotationDrivenEventListenerTests {
 	void missingListenerBeanIgnored() {
 		load(MissingEventListener.class);
 		context.getBean(UseMissingEventListener.class);
-		context.getBean(ApplicationEventMulticaster.class).multicastEvent(new TestEvent(this));
+		context.publishEvent(new TestEvent(this));
 	}
 
 
@@ -753,7 +763,6 @@ class AnnotationDrivenEventListenerTests {
 		public void handleContextEvent(ApplicationContextEvent event) {
 			collectEvent(event);
 		}
-
 	}
 
 
@@ -980,7 +989,6 @@ class AnnotationDrivenEventListenerTests {
 	}
 
 
-
 	@EventListener
 	@Retention(RetentionPolicy.RUNTIME)
 	public @interface ConditionalEvent {
@@ -1032,7 +1040,7 @@ class AnnotationDrivenEventListenerTests {
 	}
 
 
-	@Configuration
+	@Component
 	static class OrderedTestListener extends TestEventListener {
 
 		public final List<String> order = new ArrayList<>();
@@ -1056,6 +1064,11 @@ class AnnotationDrivenEventListenerTests {
 	}
 
 
+	@Component
+	public static class PublicSubclassWithInheritedEventListener extends TestEventListener {
+	}
+
+
 	static class EventOnPostConstruct {
 
 		@Autowired

spring-context/src/test/java/org/springframework/context/event/ApplicationListenerMethodAdapterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@ package org.springframework.context.event;
 import java.io.IOException;
 import java.lang.reflect.Method;
 import java.lang.reflect.UndeclaredThrowableException;
+import java.util.List;
 
 import org.junit.jupiter.api.Test;
 
@@ -46,6 +47,8 @@ import static org.mockito.Mockito.verify;
 
 /**
  * @author Stephane Nicoll
+ * @author Juergen Hoeller
+ * @author Simon Baslé
  */
 public class ApplicationListenerMethodAdapterTests extends AbstractApplicationEventListenerTests {
 
@@ -80,16 +83,23 @@ public class ApplicationListenerMethodAdapterTests extends AbstractApplicationEv
 		supportsEventType(false, method, ResolvableType.forClassWithGenerics(GenericTestEvent.class, Long.class));
 	}
 
+	@Test
+	public void genericListenerWithUnresolvedGenerics() {
+		Method method = ReflectionUtils.findMethod(
+				SampleEvents.class, "handleGenericString", GenericTestEvent.class);
+		supportsEventType(true, method, ResolvableType.forClass(GenericTestEvent.class));
+	}
+
 	@Test
 	public void listenerWithPayloadAndGenericInformation() {
 		Method method = ReflectionUtils.findMethod(SampleEvents.class, "handleString", String.class);
-		supportsEventType(true, method, createGenericEventType(String.class));
+		supportsEventType(true, method, createPayloadEventType(String.class));
 	}
 
 	@Test
 	public void listenerWithInvalidPayloadAndGenericInformation() {
 		Method method = ReflectionUtils.findMethod(SampleEvents.class, "handleString", String.class);
-		supportsEventType(false, method, createGenericEventType(Integer.class));
+		supportsEventType(false, method, createPayloadEventType(Integer.class));
 	}
 
 	@Test
@@ -113,28 +123,28 @@ public class ApplicationListenerMethodAdapterTests extends AbstractApplicationEv
 	@Test
 	public void listenerWithAnnotationValue() {
 		Method method = ReflectionUtils.findMethod(SampleEvents.class, "handleStringAnnotationValue");
-		supportsEventType(true, method, createGenericEventType(String.class));
+		supportsEventType(true, method, createPayloadEventType(String.class));
 	}
 
 	@Test
 	public void listenerWithAnnotationClasses() {
 		Method method = ReflectionUtils.findMethod(SampleEvents.class, "handleStringAnnotationClasses");
-		supportsEventType(true, method, createGenericEventType(String.class));
+		supportsEventType(true, method, createPayloadEventType(String.class));
 	}
 
 	@Test
 	public void listenerWithAnnotationValueAndParameter() {
 		Method method = ReflectionUtils.findMethod(
 				SampleEvents.class, "handleStringAnnotationValueAndParameter", String.class);
-		supportsEventType(true, method, createGenericEventType(String.class));
+		supportsEventType(true, method, createPayloadEventType(String.class));
 	}
 
 	@Test
 	public void listenerWithSeveralTypes() {
 		Method method = ReflectionUtils.findMethod(SampleEvents.class, "handleStringOrInteger");
-		supportsEventType(true, method, createGenericEventType(String.class));
-		supportsEventType(true, method, createGenericEventType(Integer.class));
-		supportsEventType(false, method, createGenericEventType(Double.class));
+		supportsEventType(true, method, createPayloadEventType(String.class));
+		supportsEventType(true, method, createPayloadEventType(Integer.class));
+		supportsEventType(false, method, createPayloadEventType(Double.class));
 	}
 
 	@Test
@@ -325,6 +335,88 @@ public class ApplicationListenerMethodAdapterTests extends AbstractApplicationEv
 		verify(this.context, times(2)).getBean("testBean");
 	}
 
+	@Test  // gh-30399
+	void simplePayloadDoesNotSupportArbitraryGenericEventType() throws Exception {
+		Method method = SampleEvents.class.getDeclaredMethod("handleString", String.class);
+		ApplicationListenerMethodAdapter adapter = createTestInstance(method);
+
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClassWithGenerics(EntityWrapper.class, Integer.class))))
+				.as("handleString(String) with EntityWrapper<Integer>").isFalse();
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClass(EntityWrapper.class))))
+				.as("handleString(String) with EntityWrapper<?>").isFalse();
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClass(String.class))))
+				.as("handleString(String) with String").isTrue();
+	}
+
+	@Test  // gh-30399
+	void genericPayloadDoesNotSupportArbitraryGenericEventType() throws Exception {
+		Method method = SampleEvents.class.getDeclaredMethod("handleGenericStringPayload", EntityWrapper.class);
+		ApplicationListenerMethodAdapter adapter = createTestInstance(method);
+
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClass(EntityWrapper.class))))
+				.as("handleGenericStringPayload(EntityWrapper<String>) with EntityWrapper<?>").isFalse();
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClassWithGenerics(EntityWrapper.class, Integer.class))))
+				.as("handleGenericStringPayload(EntityWrapper<String>) with EntityWrapper<Integer>").isFalse();
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClassWithGenerics(EntityWrapper.class, String.class))))
+				.as("handleGenericStringPayload(EntityWrapper<String>) with EntityWrapper<String>").isTrue();
+	}
+
+	@Test  // gh-30399
+	void rawGenericPayloadDoesNotSupportArbitraryGenericEventType() throws Exception {
+		Method method = SampleEvents.class.getDeclaredMethod("handleGenericAnyPayload", EntityWrapper.class);
+		ApplicationListenerMethodAdapter adapter = createTestInstance(method);
+
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClass(EntityWrapper.class))))
+				.as("handleGenericAnyPayload(EntityWrapper<?>) with EntityWrapper<?>").isTrue();
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClassWithGenerics(EntityWrapper.class, Integer.class))))
+				.as("handleGenericAnyPayload(EntityWrapper<?>) with EntityWrapper<Integer>").isTrue();
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClassWithGenerics(EntityWrapper.class, String.class))))
+				.as("handleGenericAnyPayload(EntityWrapper<?>) with EntityWrapper<String>").isTrue();
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClass(List.class))))
+				.as("handleGenericAnyPayload(EntityWrapper<?>) with List<?>").isFalse();
+		assertThat(adapter.supportsEventType(createPayloadEventType(ResolvableType.forClassWithGenerics(List.class, String.class))))
+				.as("handleGenericAnyPayload(EntityWrapper<?>) with List<String>").isFalse();
+	}
+
+	@Test  // gh-30399
+	void genericApplicationEventSupportsSpecificType() throws Exception {
+		Method method = SampleEvents.class.getDeclaredMethod("handleGenericString", GenericTestEvent.class);
+		ApplicationListenerMethodAdapter adapter = createTestInstance(method);
+
+		assertThat(adapter.supportsEventType(ResolvableType.forClass(GenericTestEvent.class)))
+				.as("handleGenericString(GenericTestEvent<String>) with GenericTestEvent<?>").isTrue();
+		assertThat(adapter.supportsEventType(ResolvableType.forClassWithGenerics(GenericTestEvent.class, Integer.class)))
+				.as("handleGenericString(GenericTestEvent<String>) with GenericTestEvent<Integer>").isFalse();
+		assertThat(adapter.supportsEventType(ResolvableType.forClassWithGenerics(GenericTestEvent.class, String.class)))
+				.as("handleGenericString(GenericTestEvent<String>) with GenericTestEvent<String>").isTrue();
+	}
+
+	@Test  // gh-30399
+	void genericRawApplicationEventSupportsRawTypeAndAnySpecificType() throws Exception {
+		Method method = SampleEvents.class.getDeclaredMethod("handleGenericRaw", GenericTestEvent.class);
+		ApplicationListenerMethodAdapter adapter = createTestInstance(method);
+
+		assertThat(adapter.supportsEventType(ResolvableType.forClass(GenericTestEvent.class)))
+				.as("handleGenericRaw(GenericTestEvent<?>) with GenericTestEvent<?>").isTrue();
+		assertThat(adapter.supportsEventType(ResolvableType.forClassWithGenerics(GenericTestEvent.class, String.class)))
+				.as("handleGenericRaw(GenericTestEvent<?>) with GenericTestEvent<String>").isTrue();
+		assertThat(adapter.supportsEventType(ResolvableType.forClassWithGenerics(GenericTestEvent.class, Integer.class)))
+				.as("handleGenericRaw(GenericTestEvent<?>) with GenericTestEvent<Integer>").isTrue();
+	}
+
+	@Test  // gh-30399
+	void unrelatedApplicationEventDoesNotSupportRawTypeOrAnySpecificType() throws Exception {
+		Method method = SampleEvents.class.getDeclaredMethod("handleUnrelated", ContextRefreshedEvent.class);
+		ApplicationListenerMethodAdapter adapter = createTestInstance(method);
+
+		assertThat(adapter.supportsEventType(ResolvableType.forClass(GenericTestEvent.class)))
+				.as("handleUnrelated(ContextRefreshedEvent) with GenericTestEvent<?>").isTrue();  // known bug in 5.3.x
+		assertThat(adapter.supportsEventType(ResolvableType.forClassWithGenerics(GenericTestEvent.class, String.class)))
+				.as("handleUnrelated(ContextRefreshedEvent) with GenericTestEvent<String>").isFalse();
+		assertThat(adapter.supportsEventType(ResolvableType.forClassWithGenerics(GenericTestEvent.class, Integer.class)))
+				.as("handleUnrelated(ContextRefreshedEvent) with GenericTestEvent<Integer>").isFalse();
+	}
+
 
 	private void supportsEventType(boolean match, Method method, ResolvableType eventType) {
 		ApplicationListenerMethodAdapter adapter = createTestInstance(method);
@@ -341,7 +433,11 @@ public class ApplicationListenerMethodAdapterTests extends AbstractApplicationEv
 		return new StaticApplicationListenerMethodAdapter(method, this.sampleEvents);
 	}
 
-	private ResolvableType createGenericEventType(Class<?> payloadType) {
+	private ResolvableType createPayloadEventType(Class<?> payloadType) {
+		return ResolvableType.forClassWithGenerics(PayloadApplicationEvent.class, payloadType);
+	}
+
+	private ResolvableType createPayloadEventType(ResolvableType payloadType) {
 		return ResolvableType.forClassWithGenerics(PayloadApplicationEvent.class, payloadType);
 	}
 
@@ -373,6 +469,14 @@ public class ApplicationListenerMethodAdapterTests extends AbstractApplicationEv
 		public void handleGenericString(GenericTestEvent<String> event) {
 		}
 
+		@EventListener
+		public void handleGenericRaw(GenericTestEvent<?> event) {
+		}
+
+		@EventListener
+		public void handleUnrelated(ContextRefreshedEvent event) {
+		}
+
 		@EventListener
 		public void handleString(String payload) {
 		}

spring-context/src/test/java/org/springframework/context/event/GenericApplicationListenerAdapterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -104,7 +104,8 @@ public class GenericApplicationListenerAdapterTests extends AbstractApplicationE
 
 	@Test
 	public void genericListenerStrictTypeSubClass() {
-		supportsEventType(false, ObjectEventListener.class, ResolvableType.forClassWithGenerics(GenericTestEvent.class, Long.class));
+		supportsEventType(false, ObjectEventListener.class,
+				ResolvableType.forClassWithGenerics(GenericTestEvent.class, Long.class));
 	}
 
 	@Test

spring-context/src/test/java/org/springframework/format/datetime/DateFormattingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -133,7 +133,7 @@ public class DateFormattingTests {
 		assertThat(exception)
 			.hasMessageContaining("for property 'styleDate'")
 			.hasCauseInstanceOf(ConversionFailedException.class).cause()
-				.hasMessageContaining("for value '99/01/01'")
+				.hasMessageContaining("for value [99/01/01]")
 				.hasCauseInstanceOf(IllegalArgumentException.class).cause()
 					.hasMessageContaining("Parse attempt failed for value [99/01/01]")
 					.hasCauseInstanceOf(ParseException.class).cause()
@@ -353,7 +353,7 @@ public class DateFormattingTests {
 			assertThat(fieldError.unwrap(TypeMismatchException.class))
 				.hasMessageContaining("for property 'patternDateWithFallbackPatterns'")
 				.hasCauseInstanceOf(ConversionFailedException.class).cause()
-					.hasMessageContaining("for value '210302'")
+					.hasMessageContaining("for value [210302]")
 					.hasCauseInstanceOf(IllegalArgumentException.class).cause()
 						.hasMessageContaining("Parse attempt failed for value [210302]")
 						.hasCauseInstanceOf(ParseException.class).cause()