Release v5.3.8

Fix missing attribute in reference documentation
This commit adds the missing `spring-framework-main-code` asciidoctor attribute in the reference documentation. Fixes gh-27041
2026-06-08 17:33:33 +00:00 · 2021-06-09 07:38:20 +00:00 · 2021-06-09 09:21:28 +02:00 · 2021-06-08 18:55:05 +02:00 · 2021-06-08 18:55:05 +02:00 · 2021-06-08 17:41:04 +01:00
832 changed files with 24033 additions and 9029 deletions
@@ -1,5 +1,5 @@
 <!--
-!!! For Security Vulnerabilities, please go to https://pivotal.io/security !!!
+!!! For Security Vulnerabilities, please go to https://spring.io/security-policy !!!
 -->
 **Affects:** \<Spring Framework version>

@@ -14,4 +14,4 @@ Thanks for taking the time to create an issue. Please read the following:
 Issue or Pull Request? Create only one, not both. GitHub treats them as the same.
 If unsure, start with an issue, and if you submit a pull request later, the
 issue will be closed as superseded.
-->
+-->
@@ -41,3 +41,6 @@ out
 test-output
 atlassian-ide-plugin.xml
 .gradletasknamecache
+
+# VS Code
+.vscode/
@@ -125,10 +125,7 @@ The reference documentation is in the [src/docs/asciidoc](src/docs/asciidoc) dir
 edit source files, and submit directly from GitHub.

 When making changes locally, execute `./gradlew asciidoctor` and then browse the result under
-`build/asciidoc/html5/index.html`.
+`build/docs/ref-docs/html5/index.html`.

-Asciidoctor also supports live editing. For more details read
-[Editing AsciiDoc with Live Preview](https://asciidoctor.org/docs/editing-asciidoc-with-live-preview/).
-Note that if you choose the
-[System Monitor](https://asciidoctor.org/docs/editing-asciidoc-with-live-preview/#using-a-system-monitor)
-option, you can find a Guardfile under `src/docs/asciidoc`.
+Asciidoctor also supports live editing. For more details see
+[AsciiDoc Tooling](https://docs.asciidoctor.org/asciidoctor/latest/tooling/).
@@ -1,4 +1,4 @@
-# <img src="src/docs/spring-framework.png" width="80" height="80"> Spring Framework [![Build Status](https://ci.spring.io/api/v1/teams/spring-framework/pipelines/spring-framework-5.3.x/jobs/build/badge)](https://ci.spring.io/teams/spring-framework/pipelines/spring-framework-5.3.x?groups=Build")
+# <img src="src/docs/spring-framework.png" width="80" height="80"> Spring Framework [![Build Status](https://ci.spring.io/api/v1/teams/spring-framework/pipelines/spring-framework-5.3.x/jobs/build/badge)](https://ci.spring.io/teams/spring-framework/pipelines/spring-framework-5.3.x?groups=Build") [![Revved up by Gradle Enterprise](https://img.shields.io/badge/Revved%20up%20by-Gradle%20Enterprise-06A0CE?logo=Gradle&labelColor=02303A)](https://ge.spring.io/scans?search.rootProjectNames=spring)

 This is the home of the Spring Framework: the foundation for all [Spring projects](https://spring.io/projects). Collectively the Spring Framework and the family of Spring projects are often referred to simply as "Spring". 

@@ -25,6 +25,10 @@ See the [Micro-Benchmarks](https://github.com/spring-projects/spring-framework/w

 See the [Build from Source](https://github.com/spring-projects/spring-framework/wiki/Build-from-Source) Wiki page and the [CONTRIBUTING.md](CONTRIBUTING.md) file.

+## Continuous Integration Builds
+
+Information regarding CI builds can be found in the [Spring Framework Concourse pipeline](ci/README.adoc) documentation.
+
 ## Stay in Touch

 Follow [@SpringCentral](https://twitter.com/springcentral), [@SpringFramework](https://twitter.com/springframework), and its [team members](https://twitter.com/springframework/lists/team/members) on Twitter. In-depth articles can be found at [The Spring Blog](https://spring.io/blog/), and releases are announced via our [news feed](https://spring.io/blog/category/news).
@@ -1,15 +1,17 @@
 plugins {
 	id 'io.spring.dependency-management' version '1.0.9.RELEASE' apply false
 	id 'io.spring.nohttp' version '0.0.5.RELEASE'
-	id 'org.jetbrains.kotlin.jvm' version '1.4.10' apply false
+	id 'org.jetbrains.kotlin.jvm' version '1.5.10' apply false
 	id 'org.jetbrains.dokka' version '0.10.1' apply false
 	id 'org.asciidoctor.jvm.convert' version '3.1.0'
 	id 'org.asciidoctor.jvm.pdf' version '3.1.0'
 	id 'de.undercouch.download' version '4.1.1'
 	id "io.freefair.aspectj" version '5.1.1' apply false
 	id "com.github.ben-manes.versions" version '0.28.0'
-	id "me.champeau.gradle.jmh" version "0.5.0" apply false
-	id "org.jetbrains.kotlin.plugin.serialization" version "1.4.10" apply false
+	id "com.github.johnrengelman.shadow" version "6.1.0" apply false
+	id "me.champeau.jmh" version "0.6.4" apply false
+	id "org.jetbrains.kotlin.plugin.serialization" version "1.5.10" apply false
+	id "org.unbroken-dome.xjc" version '2.0.0' apply false
 }

 ext {
@@ -25,18 +27,19 @@ configure(allprojects) { project ->

 	dependencyManagement {
 		imports {
-			mavenBom "com.fasterxml.jackson:jackson-bom:2.11.3"
-			mavenBom "io.netty:netty-bom:4.1.53.Final"
-			mavenBom "io.projectreactor:reactor-bom:2020.0.0"
-			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR8"
+			mavenBom "com.fasterxml.jackson:jackson-bom:2.12.3"
+			mavenBom "io.netty:netty-bom:4.1.65.Final"
+			mavenBom "io.projectreactor:reactor-bom:2020.0.7"
+			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR10"
 			mavenBom "io.rsocket:rsocket-bom:1.1.0"
-			mavenBom "org.eclipse.jetty:jetty-bom:9.4.34.v20201102"
-			mavenBom "org.jetbrains.kotlin:kotlin-bom:1.4.10"
-			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.4.1"
-			mavenBom "org.junit:junit-bom:5.7.0"
+			mavenBom "org.eclipse.jetty:jetty-bom:9.4.41.v20210516"
+			mavenBom "org.jetbrains.kotlin:kotlin-bom:1.5.10"
+			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.5.0"
+			mavenBom "org.jetbrains.kotlinx:kotlinx-serialization-bom:1.2.1"
+			mavenBom "org.junit:junit-bom:5.7.2"
 		}
 		dependencies {
-			dependencySet(group: 'org.apache.logging.log4j', version: '2.13.3') {
+			dependencySet(group: 'org.apache.logging.log4j', version: '2.14.1') {
 				entry 'log4j-api'
 				entry 'log4j-core'
 				entry 'log4j-jul'
@@ -53,7 +56,7 @@ configure(allprojects) { project ->
 				entry 'aspectjtools'
 				entry 'aspectjweaver'
 			}
-			dependencySet(group: 'org.codehaus.groovy', version: '3.0.6') {
+			dependencySet(group: 'org.codehaus.groovy', version: '3.0.8') {
 				entry 'groovy'
 				entry 'groovy-jsr223'
 				entry 'groovy-templates'  // requires findbugs for warning-free compilation
@@ -63,23 +66,23 @@ configure(allprojects) { project ->

 			dependency "io.reactivex:rxjava:1.3.8"
 			dependency "io.reactivex:rxjava-reactive-streams:1.2.1"
-			dependency "io.reactivex.rxjava2:rxjava:2.2.19"
-			dependency "io.reactivex.rxjava3:rxjava:3.0.7"
+			dependency "io.reactivex.rxjava2:rxjava:2.2.21"
+			dependency "io.reactivex.rxjava3:rxjava:3.0.13"
 			dependency "io.projectreactor.tools:blockhound:1.0.4.RELEASE"

 			dependency "com.caucho:hessian:4.0.63"
-			dependency "com.fasterxml:aalto-xml:1.2.2"
-			dependency("com.fasterxml.woodstox:woodstox-core:6.2.3") {
+			dependency "com.fasterxml:aalto-xml:1.3.0"
+			dependency("com.fasterxml.woodstox:woodstox-core:6.2.6") {
 				exclude group: "stax", name: "stax-api"
 			}
-			dependency "com.google.code.gson:gson:2.8.6"
-			dependency "com.google.protobuf:protobuf-java-util:3.13.0"
+			dependency "com.google.code.gson:gson:2.8.7"
+			dependency "com.google.protobuf:protobuf-java-util:3.17.2"
 			dependency "com.googlecode.protobuf-java-format:protobuf-java-format:1.4"
-			dependency("com.thoughtworks.xstream:xstream:1.4.13") {
+			dependency("com.thoughtworks.xstream:xstream:1.4.17") {
 				exclude group: "xpp3", name: "xpp3_min"
 				exclude group: "xmlpull", name: "xmlpull"
 			}
-			dependency "org.apache.johnzon:johnzon-jsonb:1.2.8"
+			dependency "org.apache.johnzon:johnzon-jsonb:1.2.10"
 			dependency("org.codehaus.jettison:jettison:1.3.8") {
 				exclude group: "stax", name: "stax-api"
 			}
@@ -88,20 +91,16 @@ configure(allprojects) { project ->
 				entry 'jibx-run'
 			}
 			dependency "org.ogce:xpp3:1.1.6"
-			dependency "org.yaml:snakeyaml:1.27"
-			dependencySet(group: 'org.jetbrains.kotlinx', version: '1.0.0') {
-				entry 'kotlinx-serialization-core'
-				entry 'kotlinx-serialization-json'
-			}
+			dependency "org.yaml:snakeyaml:1.28"

 			dependency "com.h2database:h2:1.4.200"
-			dependency "com.github.ben-manes.caffeine:caffeine:2.8.6"
-			dependency "com.github.librepdf:openpdf:1.3.22"
+			dependency "com.github.ben-manes.caffeine:caffeine:2.9.1"
+			dependency "com.github.librepdf:openpdf:1.3.26"
 			dependency "com.rometools:rome:1.15.0"
 			dependency "commons-io:commons-io:2.5"
 			dependency "io.vavr:vavr:0.10.3"
 			dependency "net.sf.jopt-simple:jopt-simple:5.0.4"
-			dependencySet(group: 'org.apache.activemq', version: '5.16.0') {
+			dependencySet(group: 'org.apache.activemq', version: '5.16.2') {
 				entry 'activemq-broker'
 				entry('activemq-kahadb-store') {
 					exclude group: "org.springframework", name: "spring-context"
@@ -116,30 +115,30 @@ configure(allprojects) { project ->
 			}
 			dependency "org.apache.poi:poi-ooxml:4.1.2"
 			dependency "org.apache-extras.beanshell:bsh:2.0b6"
-			dependency "org.freemarker:freemarker:2.3.30"
-			dependency "org.hsqldb:hsqldb:2.5.1"
+			dependency "org.freemarker:freemarker:2.3.31"
+			dependency "org.hsqldb:hsqldb:2.5.2"
 			dependency "org.quartz-scheduler:quartz:2.3.2"
 			dependency "org.codehaus.fabric3.api:commonj:1.1.0"
 			dependency "net.sf.ehcache:ehcache:2.10.6"
 			dependency "org.ehcache:jcache:1.0.1"
 			dependency "org.ehcache:ehcache:3.4.0"
-			dependency "org.hibernate:hibernate-core:5.4.23.Final"
-			dependency "org.hibernate:hibernate-validator:6.1.6.Final"
+			dependency "org.hibernate:hibernate-core:5.4.32.Final"
+			dependency "org.hibernate:hibernate-validator:6.2.0.Final"
 			dependency "org.webjars:webjars-locator-core:0.46"
 			dependency "org.webjars:underscorejs:1.8.3"

-			dependencySet(group: 'org.apache.tomcat', version: '9.0.39') {
+			dependencySet(group: 'org.apache.tomcat', version: '9.0.45') {
 				entry 'tomcat-util'
 				entry('tomcat-websocket') {
 					exclude group: "org.apache.tomcat", name: "tomcat-websocket-api"
 					exclude group: "org.apache.tomcat", name: "tomcat-servlet-api"
 				}
 			}
-			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.39') {
+			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.45') {
 				entry 'tomcat-embed-core'
 				entry 'tomcat-embed-websocket'
 			}
-			dependencySet(group: 'io.undertow', version: '2.2.2.Final') {
+			dependencySet(group: 'io.undertow', version: '2.2.8.Final') {
 				entry 'undertow-core'
 				entry('undertow-websockets-jsr') {
 					exclude group: "org.jboss.spec.javax.websocket", name: "jboss-websocket-api_1.1_spec"
@@ -154,17 +153,17 @@ configure(allprojects) { project ->
 				entry 'okhttp'
 				entry 'mockwebserver'
 			}
-			dependency("org.apache.httpcomponents:httpclient:4.5.12") {
+			dependency("org.apache.httpcomponents:httpclient:4.5.13") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
 			dependency("org.apache.httpcomponents:httpasyncclient:4.1.4") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
-			dependency 'org.apache.httpcomponents.client5:httpclient5:5.0.3'
-			dependency 'org.apache.httpcomponents.core5:httpcore5-reactive:5.0.2'
-			dependency "org.eclipse.jetty:jetty-reactive-httpclient:1.1.4"
+			dependency 'org.apache.httpcomponents.client5:httpclient5:5.1'
+			dependency 'org.apache.httpcomponents.core5:httpcore5-reactive:5.1.1'
+			dependency "org.eclipse.jetty:jetty-reactive-httpclient:1.1.8"

-			dependency "org.jruby:jruby:9.2.13.0"
+			dependency "org.jruby:jruby:9.2.17.0"
 			dependency "org.python:jython-standalone:2.7.1"
 			dependency "org.mozilla:rhino:1.7.11"

@@ -181,34 +180,34 @@ configure(allprojects) { project ->
 				exclude group: "dom4j", name: "dom4j"
 			}

-			dependency("junit:junit:4.13.1") {
+			dependency("junit:junit:4.13.2") {
 				exclude group: "org.hamcrest", name: "hamcrest-core"
 			}
 			dependency("de.bechte.junit:junit-hierarchicalcontextrunner:4.12.1") {
 				exclude group: "junit", name: "junit"
 			}
-			dependency "org.testng:testng:7.3.0"
+			dependency "org.testng:testng:7.4.0"
 			dependency "org.hamcrest:hamcrest:2.1"
 			dependency "org.awaitility:awaitility:3.1.6"
-			dependency "org.assertj:assertj-core:3.18.0"
-			dependencySet(group: 'org.xmlunit', version: '2.6.2') {
+			dependency "org.assertj:assertj-core:3.19.0"
+			dependencySet(group: 'org.xmlunit', version: '2.8.2') {
 				entry 'xmlunit-assertj'
 				entry('xmlunit-matchers') {
 					exclude group: "org.hamcrest", name: "hamcrest-core"
 				}
 			}
-			dependencySet(group: 'org.mockito', version: '3.6.0') {
+			dependencySet(group: 'org.mockito', version: '3.11.0') {
 				entry('mockito-core') {
 					exclude group: "org.hamcrest", name: "hamcrest-core"
 				}
 				entry 'mockito-junit-jupiter'
 			}
-			dependency "io.mockk:mockk:1.10.0"
+			dependency "io.mockk:mockk:1.10.2"

-			dependency("net.sourceforge.htmlunit:htmlunit:2.44.0") {
+			dependency("net.sourceforge.htmlunit:htmlunit:2.50.0") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
-			dependency("org.seleniumhq.selenium:htmlunit-driver:2.44.0") {
+			dependency("org.seleniumhq.selenium:htmlunit-driver:2.50.0") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
 			dependency("org.seleniumhq.selenium:selenium-java:3.141.59") {
@@ -216,7 +215,7 @@ configure(allprojects) { project ->
 				exclude group: "io.netty", name: "netty"
 			}
 			dependency "org.skyscreamer:jsonassert:1.5.0"
-			dependency "com.jayway.jsonpath:json-path:2.4.0"
+			dependency "com.jayway.jsonpath:json-path:2.5.0"
 			dependency "org.bouncycastle:bcpkix-jdk15on:1.66"

 			dependencySet(group: 'org.apache.tiles', version: '3.0.8') {
@@ -236,8 +235,8 @@ configure(allprojects) { project ->

 			dependency "com.ibm.websphere:uow:6.0.2.17"
 			dependency "com.jamonapi:jamon:2.82"
-			dependency "joda-time:joda-time:2.10.6"
-			dependency "org.eclipse.persistence:org.eclipse.persistence.jpa:2.7.7"
+			dependency "joda-time:joda-time:2.10.10"
+			dependency "org.eclipse.persistence:org.eclipse.persistence.jpa:2.7.8"
 			dependency "org.javamoney:moneta:1.3"

 			dependency "com.sun.activation:javax.activation:1.2.0"
@@ -308,23 +307,21 @@ configure([rootProject] + javaProjects) { project ->
 	apply plugin: "java-test-fixtures"
 	apply plugin: "checkstyle"
 	apply plugin: 'org.springframework.build.compile'
-	apply from: "${rootDir}/gradle/custom-java-home.gradle"
+	apply from: "${rootDir}/gradle/toolchains.gradle"
 	apply from: "${rootDir}/gradle/ide.gradle"

 	pluginManager.withPlugin("kotlin") {
 		apply plugin: "org.jetbrains.dokka"
 		compileKotlin {
 			kotlinOptions {
-				jvmTarget = "1.8"
 				languageVersion = "1.3"
 				apiVersion = "1.3"
-				freeCompilerArgs = ["-Xjsr305=strict"]
+				freeCompilerArgs = ["-Xjsr305=strict", "-Xsuppress-version-warnings", "-Xopt-in=kotlin.RequiresOptIn"]
 				allWarningsAsErrors = true
 			}
 		}
 		compileTestKotlin {
 			kotlinOptions {
-				jvmTarget = "1.8"
 				freeCompilerArgs = ["-Xjsr305=strict"]
 			}
 		}
@@ -339,7 +336,7 @@ configure([rootProject] + javaProjects) { project ->
 	}

 	checkstyle {
-		toolVersion = "8.36.2"
+		toolVersion = "8.43"
 		configDirectory.set(rootProject.file("src/checkstyle"))
 	}

@@ -378,10 +375,10 @@ configure([rootProject] + javaProjects) { project ->
 			"https://fasterxml.github.io/jackson-core/javadoc/2.10/",
 			"https://fasterxml.github.io/jackson-databind/javadoc/2.10/",
 			"https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.10/",
-			"https://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/",
+			"https://hc.apache.org/httpcomponents-client-5.1.x/current/httpclient5/apidocs/",
 			"https://projectreactor.io/docs/test/release/api/",
-			"https://junit.org/junit4/javadoc/4.13.1/",
-			"https://junit.org/junit5/docs/5.7.0/api/"
+			"https://junit.org/junit4/javadoc/4.13.2/",
+			"https://junit.org/junit5/docs/5.7.2/api/"
 	] as String[]
 }

@@ -8,16 +8,10 @@ They are declared in the `build.gradle` file in this folder.
 ### Compiler conventions

 The `org.springframework.build.compile` plugin applies the Java compiler conventions to the build.
-By default, the build compiles sources with Java `1.8` source and target compatibility.
-You can test a different source compatibility version on the CLI with a project property like:
-
-```
-./gradlew test -PjavaSourceVersion=11
-```

 ## Build Plugins

-## Optional dependencies
+### Optional dependencies

 The `org.springframework.build.optional-dependencies` plugin creates a new `optional`
 Gradle configuration - it adds the dependencies to the project's compile and runtime classpath
@@ -25,7 +19,7 @@ but doesn't affect the classpath of dependent projects.
 This plugin does not provide a `provided` configuration, as the native `compileOnly` and `testCompileOnly`
 configurations are preferred.

-## API Diff
+### API Diff

 This plugin uses the [Gradle JApiCmp](https://github.com/melix/japicmp-gradle-plugin) plugin
 to generate API Diff reports for each Spring Framework module. This plugin is applied once on the root
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -20,31 +20,21 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;

-import org.gradle.api.JavaVersion;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
+import org.gradle.api.plugins.JavaLibraryPlugin;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.JavaPluginConvention;
 import org.gradle.api.tasks.compile.JavaCompile;

 /**
 * {@link Plugin} that applies conventions for compiling Java sources in Spring Framework.
- * <p>One can override the default Java source compatibility version
- * with a dedicated property on the CLI: {@code "./gradlew test -PjavaSourceVersion=11"}.
 *
 * @author Brian Clozel
 * @author Sam Brannen
 */
 public class CompilerConventionsPlugin implements Plugin<Project> {

-	/**
-	 * The project property that can be used to switch the Java source
-	 * compatibility version for building source and test classes.
-	 */
-	public static final String JAVA_SOURCE_VERSION_PROPERTY = "javaSourceVersion";
-
-	public static final JavaVersion DEFAULT_COMPILER_VERSION = JavaVersion.VERSION_1_8;
-
 	private static final List<String> COMPILER_ARGS;

 	private static final List<String> TEST_COMPILER_ARGS;
@@ -69,7 +59,7 @@ public class CompilerConventionsPlugin implements Plugin<Project> {

 	@Override
 	public void apply(Project project) {
-		project.getPlugins().withType(JavaPlugin.class, javaPlugin -> applyJavaCompileConventions(project));
+		project.getPlugins().withType(JavaLibraryPlugin.class, javaPlugin -> applyJavaCompileConventions(project));
 	}

 	/**
@@ -79,15 +69,6 @@ public class CompilerConventionsPlugin implements Plugin<Project> {
 	 */
 	private void applyJavaCompileConventions(Project project) {
 		JavaPluginConvention java = project.getConvention().getPlugin(JavaPluginConvention.class);
-		if (project.hasProperty(JAVA_SOURCE_VERSION_PROPERTY)) {
-			JavaVersion javaSourceVersion = JavaVersion.toVersion(project.property(JAVA_SOURCE_VERSION_PROPERTY));
-			java.setSourceCompatibility(javaSourceVersion);
-		}
-		else {
-			java.setSourceCompatibility(DEFAULT_COMPILER_VERSION);
-		}
-		java.setTargetCompatibility(DEFAULT_COMPILER_VERSION);
-
 		project.getTasks().withType(JavaCompile.class)
 				.matching(compileTask -> compileTask.getName().equals(JavaPlugin.COMPILE_JAVA_TASK_NAME))
 				.forEach(compileTask -> {
@@ -1,7 +1,8 @@
 == Spring Framework Concourse pipeline

-The Spring Framework is using https://concourse-ci.org/[Concourse] for its CI build and other automated tasks.
-The Spring team has a dedicated Concourse instance available at https://ci.spring.io.
+The Spring Framework uses https://concourse-ci.org/[Concourse] for its CI build and other automated tasks.
+The Spring team has a dedicated Concourse instance available at https://ci.spring.io with a build pipeline
+for https://ci.spring.io/teams/spring-framework/pipelines/spring-framework-5.3.x[Spring Framework 5.3.x].

 === Setting up your development environment

@@ -25,13 +26,17 @@ spring                https://ci.spring.io  spring-framework      Wed, 25 Mar 20
 ----

 === Pipeline configuration and structure
+
 The build pipelines are described in `pipeline.yml` file.
+
 This file is listing Concourse resources, i.e. build inputs and outputs such as container images, artifact repositories, source repositories, notification services, etc.
+
 It also describes jobs (a job is a sequence of inputs, tasks and outputs); jobs are organized by groups.

 The `pipeline.yml` definition contains `((parameters))` which are loaded from the `parameters.yml` file or from our https://docs.cloudfoundry.org/credhub/[credhub instance].

 You'll find in this folder the following resources:
+
 * `pipeline.yml` the build pipeline
 * `parameters.yml` the build parameters used for the pipeline
 * `images/` holds the container images definitions used in this pipeline
@@ -41,6 +46,7 @@ You'll find in this folder the following resources:
 === Updating the build pipeline

 Updating files on the repository is not enough to update the build pipeline, as changes need to be applied.
+
 The pipeline can be deployed using the following command:

 [source]
@@ -48,4 +54,4 @@ The pipeline can be deployed using the following command:
 $ fly -t spring set-pipeline -p spring-framework-5.3.x -c ci/pipeline.yml -l ci/parameters.yml
 ----

-NOTE: This assumes that you have credhub integration configured with the appropriate secrets.
+NOTE: This assumes that you have credhub integration configured with the appropriate secrets.
@@ -1,9 +1,10 @@
 logging:
  level:
    io.spring.concourse: DEBUG
-distribute:
-  optional-deployments:
-    - '.*\\.zip'
 spring:
  main:
-    banner-mode: off
+    banner-mode: off
+sonatype:
+  exclude:
+    - 'build-info\.json'
+    - '.*\.zip'
@@ -0,0 +1,11 @@
+FROM ubuntu:focal-20210119
+
+ADD setup.sh /setup.sh
+ADD get-jdk-url.sh /get-jdk-url.sh
+RUN ./setup.sh java8
+
+ENV JAVA_HOME /opt/openjdk/java8
+ENV JDK11 /opt/openjdk/java11
+ENV JDK15 /opt/openjdk/java15
+
+ENV PATH $JAVA_HOME/bin:$PATH
@@ -3,16 +3,13 @@ set -e

 case "$1" in
 	java8)
-		 echo "https://github.com/AdoptOpenJDK/openjdk8-binaries/releases/download/jdk8u265-b01/OpenJDK8U-jdk_x64_linux_hotspot_8u265b01.tar.gz"
+		 echo "https://github.com/AdoptOpenJDK/openjdk8-binaries/releases/download/jdk8u282-b08/OpenJDK8U-jdk_x64_linux_hotspot_8u282b08.tar.gz"
 	;;
 	java11)
-		 echo "https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.8%2B10/OpenJDK11U-jdk_x64_linux_hotspot_11.0.8_10.tar.gz"
-	;;
-	java14)
-		 echo "https://github.com/AdoptOpenJDK/openjdk14-binaries/releases/download/jdk-14.0.2%2B12/OpenJDK14U-jdk_x64_linux_hotspot_14.0.2_12.tar.gz"
+		 echo "https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.10%2B9/OpenJDK11U-jdk_x64_linux_hotspot_11.0.10_9.tar.gz"
 	;;
  java15)
-		 echo "https://github.com/AdoptOpenJDK/openjdk15-binaries/releases/download/jdk-15%2B36/OpenJDK15U-jdk_x64_linux_hotspot_15_36.tar.gz"
+		 echo "https://github.com/AdoptOpenJDK/openjdk15-binaries/releases/download/jdk-15.0.2%2B7/OpenJDK15U-jdk_x64_linux_hotspot_15.0.2_7.tar.gz"
  ;;
  *)
 		echo $"Unknown java version"
@@ -5,24 +5,34 @@ set -ex
 # UTILS
 ###########################################################

+export DEBIAN_FRONTEND=noninteractive
 apt-get update
-apt-get install --no-install-recommends -y ca-certificates net-tools libxml2-utils git curl libudev1 libxml2-utils iptables iproute2 jq fontconfig
+apt-get install --no-install-recommends -y tzdata ca-certificates net-tools libxml2-utils git curl libudev1 libxml2-utils iptables iproute2 jq fontconfig
+ln -fs /usr/share/zoneinfo/UTC /etc/localtime
+dpkg-reconfigure --frontend noninteractive tzdata
 rm -rf /var/lib/apt/lists/*

-curl https://raw.githubusercontent.com/spring-io/concourse-java-scripts/v0.0.3/concourse-java.sh > /opt/concourse-java.sh
+curl https://raw.githubusercontent.com/spring-io/concourse-java-scripts/v0.0.4/concourse-java.sh > /opt/concourse-java.sh

-curl --output /opt/concourse-release-scripts.jar https://repo.spring.io/release/io/spring/concourse/releasescripts/concourse-release-scripts/0.2.1/concourse-release-scripts-0.2.1.jar
+curl --output /opt/concourse-release-scripts.jar https://repo.spring.io/release/io/spring/concourse/releasescripts/concourse-release-scripts/0.3.2/concourse-release-scripts-0.3.2.jar

 ###########################################################
 # JAVA
 ###########################################################
-JDK_URL=$( ./get-jdk-url.sh $1 )

 mkdir -p /opt/openjdk
-cd /opt/openjdk
-curl -L ${JDK_URL} | tar zx --strip-components=1
-test -f /opt/openjdk/bin/java
-test -f /opt/openjdk/bin/javac
+pushd /opt/openjdk > /dev/null
+for jdk in java8 java11 java15
+do
+  JDK_URL=$( /get-jdk-url.sh $jdk )
+  mkdir $jdk
+  pushd $jdk > /dev/null
+  curl -L ${JDK_URL} | tar zx --strip-components=1
+  test -f bin/java
+  test -f bin/javac
+  popd > /dev/null
+done
+popd

 ###########################################################
 # GRADLE ENTERPRISE
@@ -1,8 +0,0 @@
-FROM ubuntu:bionic-20200713
-
-ADD setup.sh /setup.sh
-ADD get-jdk-url.sh /get-jdk-url.sh
-RUN ./setup.sh java8
-
-ENV JAVA_HOME /opt/openjdk
-ENV PATH $JAVA_HOME/bin:$PATH
@@ -1,8 +0,0 @@
-FROM ubuntu:bionic-20200713
-
-ADD setup.sh /setup.sh
-ADD get-jdk-url.sh /get-jdk-url.sh
-RUN ./setup.sh java11
-
-ENV JAVA_HOME /opt/openjdk
-ENV PATH $JAVA_HOME/bin:$PATH
@@ -1,8 +0,0 @@
-FROM ubuntu:bionic-20200713
-
-ADD setup.sh /setup.sh
-ADD get-jdk-url.sh /get-jdk-url.sh
-RUN ./setup.sh java14
-
-ENV JAVA_HOME /opt/openjdk
-ENV PATH $JAVA_HOME/bin:$PATH
@@ -1,8 +0,0 @@
-FROM ubuntu:bionic-20200713
-
-ADD setup.sh /setup.sh
-ADD get-jdk-url.sh /get-jdk-url.sh
-RUN ./setup.sh java15
-
-ENV JAVA_HOME /opt/openjdk
-ENV PATH $JAVA_HOME/bin:$PATH
@@ -5,10 +5,9 @@ github-repo: "https://github.com/spring-projects/spring-framework.git"
 github-repo-name: "spring-projects/spring-framework"
 docker-hub-organization: "springci"
 artifactory-server: "https://repo.spring.io"
-branch: "master"
+branch: "main"
+milestone: "5.3.x"
 build-name: "spring-framework"
 pipeline-name: "spring-framework"
 concourse-url: "https://ci.spring.io"
-bintray-subject: "spring"
-bintray-repo: "jars"
-task-timeout: 1h00m
+task-timeout: 1h00m
@@ -1,21 +1,29 @@
 anchors:
-  artifactory-task-params: &artifactory-task-params
-    ARTIFACTORY_SERVER: ((artifactory-server))
-    ARTIFACTORY_USERNAME: ((artifactory-username))
-    ARTIFACTORY_PASSWORD: ((artifactory-password))
-  bintray-task-params: &bintray-task-params
-    BINTRAY_SUBJECT: ((bintray-subject))
-    BINTRAY_REPO: ((bintray-repo))
-    BINTRAY_USERNAME: ((bintray-username))
-    BINTRAY_API_KEY: ((bintray-api-key))
-  docker-resource-source: &docker-resource-source
-    username: ((docker-hub-username))
-    password: ((docker-hub-password))
-    tag: 5.3.x
+  git-repo-resource-source: &git-repo-resource-source
+    uri: ((github-repo))
+    username: ((github-username))
+    password: ((github-password))
+    branch: ((branch))
  gradle-enterprise-task-params: &gradle-enterprise-task-params
    GRADLE_ENTERPRISE_ACCESS_KEY: ((gradle_enterprise_secret_access_key))
    GRADLE_ENTERPRISE_CACHE_USERNAME: ((gradle_enterprise_cache_user.username))
    GRADLE_ENTERPRISE_CACHE_PASSWORD: ((gradle_enterprise_cache_user.password))
+  sonatype-task-params: &sonatype-task-params
+    SONATYPE_USERNAME: ((sonatype-username))
+    SONATYPE_PASSWORD: ((sonatype-password))
+    SONATYPE_URL: ((sonatype-url))
+    SONATYPE_STAGING_PROFILE_ID: ((sonatype-staging-profile-id))
+  artifactory-task-params: &artifactory-task-params
+    ARTIFACTORY_SERVER: ((artifactory-server))
+    ARTIFACTORY_USERNAME: ((artifactory-username))
+    ARTIFACTORY_PASSWORD: ((artifactory-password))
+  build-project-task-params: &build-project-task-params
+      BRANCH: ((branch))
+      <<: *gradle-enterprise-task-params
+  docker-resource-source: &docker-resource-source
+    username: ((docker-hub-username))
+    password: ((docker-hub-password))
+    tag: ((milestone))
  slack-fail-params: &slack-fail-params
    text: >
      :concourse-failed: <https://ci.spring.io/teams/${BUILD_TEAM_NAME}/pipelines/${BUILD_PIPELINE_NAME}/jobs/${BUILD_JOB_NAME}/builds/${BUILD_NAME}|${BUILD_PIPELINE_NAME} ${BUILD_JOB_NAME} failed!>
@@ -24,9 +32,6 @@ anchors:
    silent: true
    icon_emoji: ":concourse:"
    username: concourse-ci
-  sonatype-task-params: &sonatype-task-params
-    SONATYPE_USER_TOKEN: ((sonatype-user-token))
-    SONATYPE_PASSWORD_TOKEN: ((sonatype-user-token-password))
  changelog-task-params: &changelog-task-params
    name: generated-changelog/tag
    tag: generated-changelog/tag
@@ -37,30 +42,31 @@ anchors:

 resource_types:
 - name: artifactory-resource
-  type: docker-image
+  type: registry-image
  source:
    repository: springio/artifactory-resource
-    tag: 0.0.12
+    tag: 0.0.13
 - name: github-status-resource
-  type: docker-image
+  type: registry-image
  source:
    repository: dpb587/github-status-resource
    tag: master
+- name: pull-request
+  type: registry-image
+  source:
+    repository: teliaoss/github-pr-resource
+    tag: v0.23.0
 - name: slack-notification
-  type: docker-image
+  type: registry-image
  source:
    repository: cfcommunity/slack-notification-resource
    tag: latest
-
 resources:
 - name: git-repo
  type: git
  icon: github
  source:
-    uri: ((github-repo))
-    username: ((github-username))
-    password: ((github-password))
-    branch: ((branch))
+    <<: *git-repo-resource-source
 - name: every-morning
  type: time
  icon: alarm
@@ -75,30 +81,12 @@ resources:
    uri: ((github-repo))
    branch: ((branch))
    paths: ["ci/images/*"]
- name: spring-framework-ci-image
+- name: ci-image
  type: docker-image
  icon: docker
  source:
    <<: *docker-resource-source
-    repository: ((docker-hub-organization))/spring-framework-ci-image
- name: spring-framework-jdk11-ci-image
-  type: docker-image
-  icon: docker
-  source:
-    <<: *docker-resource-source
-    repository: ((docker-hub-organization))/spring-framework-jdk11-ci-image
- name: spring-framework-jdk14-ci-image
-  type: docker-image
-  icon: docker
-  source:
-    <<: *docker-resource-source
-    repository: ((docker-hub-organization))/spring-framework-jdk14-ci-image
- name: spring-framework-jdk15-ci-image
-  type: docker-image
-  icon: docker
-  source:
-    <<: *docker-resource-source
-    repository: ((docker-hub-organization))/spring-framework-jdk15-ci-image
+    repository: ((docker-hub-organization))/spring-framework-ci
 - name: artifactory-repo
  type: artifactory-resource
  icon: package-variant
@@ -107,6 +95,14 @@ 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
@@ -123,14 +119,6 @@ resources:
    access_token: ((github-ci-status-token))
    branch: ((branch))
    context: jdk11-build
- name: repo-status-jdk14-build
-  type: github-status-resource
-  icon: eye-check-outline
-  source:
-    repository: ((github-repo-name))
-    access_token: ((github-ci-status-token))
-    branch: ((branch))
-    context: jdk14-build
 - name: repo-status-jdk15-build
  type: github-status-resource
  icon: eye-check-outline
@@ -161,47 +149,33 @@ resources:
    repository: spring-framework
    access_token: ((github-ci-release-token))
    pre_release: false
-
 jobs:
- name: build-spring-framework-ci-images
+- name: build-ci-images
  plan:
  - get: ci-images-git-repo
    trigger: true
  - in_parallel:
-    - put: spring-framework-ci-image
+    - put: ci-image
      params:
        build: ci-images-git-repo/ci/images
-        dockerfile: ci-images-git-repo/ci/images/spring-framework-ci-image/Dockerfile
-    - put: spring-framework-jdk11-ci-image
-      params:
-        build: ci-images-git-repo/ci/images
-        dockerfile: ci-images-git-repo/ci/images/spring-framework-jdk11-ci-image/Dockerfile
-    - put: spring-framework-jdk14-ci-image
-      params:
-        build: ci-images-git-repo/ci/images
-        dockerfile: ci-images-git-repo/ci/images/spring-framework-jdk14-ci-image/Dockerfile
-    - put: spring-framework-jdk15-ci-image
-      params:
-        build: ci-images-git-repo/ci/images
-        dockerfile: ci-images-git-repo/ci/images/spring-framework-jdk15-ci-image/Dockerfile
+        dockerfile: ci-images-git-repo/ci/images/ci-image/Dockerfile
 - name: build
  serial: true
  public: true
  plan:
-  - get: spring-framework-ci-image
+  - get: ci-image
  - get: git-repo
    trigger: true
  - put: repo-status-build
    params: { state: "pending", commit: "git-repo" }
  - do:
    - task: build-project
+      image: ci-image
+      file: git-repo/ci/tasks/build-project.yml
      privileged: true
      timeout: ((task-timeout))
-      image: spring-framework-ci-image
-      file: git-repo/ci/tasks/build-project.yml
      params:
-        BRANCH: ((branch))
-        <<: *gradle-enterprise-task-params
+        <<: *build-project-task-params
    on_failure:
      do:
      - put: repo-status-build
@@ -213,6 +187,8 @@ jobs:
    params: { state: "success", commit: "git-repo" }
  - put: artifactory-repo
    params: &artifactory-params
+      signing_key: ((signing-key))
+      signing_passphrase: ((signing-passphrase))
      repo: libs-snapshot-local
      folder: distribution-repository
      build_uri: "https://ci.spring.io/teams/${BUILD_TEAM_NAME}/pipelines/${BUILD_PIPELINE_NAME}/jobs/${BUILD_JOB_NAME}/builds/${BUILD_NAME}"
@@ -244,7 +220,7 @@ jobs:
  serial: true
  public: true
  plan:
-  - get: spring-framework-jdk11-ci-image
+  - get: ci-image
  - get: git-repo
  - get: every-morning
    trigger: true
@@ -252,13 +228,13 @@ jobs:
    params: { state: "pending", commit: "git-repo" }
  - do:
    - task: check-project
+      image: ci-image
+      file: git-repo/ci/tasks/check-project.yml
      privileged: true
      timeout: ((task-timeout))
-      image: spring-framework-jdk11-ci-image
-      file: git-repo/ci/tasks/check-project.yml
      params:
-        BRANCH: ((branch))
-        <<: *gradle-enterprise-task-params
+        TEST_TOOLCHAIN: 11
+        <<: *build-project-task-params
    on_failure:
      do:
      - put: repo-status-jdk11-build
@@ -268,53 +244,25 @@ jobs:
          <<: *slack-fail-params
  - put: repo-status-jdk11-build
    params: { state: "success", commit: "git-repo" }
- name: jdk14-build
-  serial: true
-  public: true
-  plan:
-    - get: spring-framework-jdk14-ci-image
-    - get: git-repo
-    - get: every-morning
-      trigger: true
-    - put: repo-status-jdk14-build
-      params: { state: "pending", commit: "git-repo" }
-    - do:
-      - task: check-project
-        privileged: true
-        timeout: ((task-timeout))
-        image: spring-framework-jdk14-ci-image
-        file: git-repo/ci/tasks/check-project.yml
-        params:
-          BRANCH: ((branch))
-          <<: *gradle-enterprise-task-params
-      on_failure:
-        do:
-          - put: repo-status-jdk14-build
-            params: { state: "failure", commit: "git-repo" }
-          - put: slack-alert
-            params:
-              <<: *slack-fail-params
-    - put: repo-status-jdk14-build
-      params: { state: "success", commit: "git-repo" }
 - name: jdk15-build
  serial: true
  public: true
  plan:
-    - get: spring-framework-jdk15-ci-image
+    - get: ci-image
    - get: git-repo
    - get: every-morning
      trigger: true
    - put: repo-status-jdk15-build
      params: { state: "pending", commit: "git-repo" }
    - do:
-        - task: check-project
-          privileged: true
-          timeout: ((task-timeout))
-          image: spring-framework-jdk15-ci-image
-          file: git-repo/ci/tasks/check-project.yml
-          params:
-            BRANCH: ((branch))
-            <<: *gradle-enterprise-task-params
+      - task: check-project
+        image: ci-image
+        file: git-repo/ci/tasks/check-project.yml
+        privileged: true
+        timeout: ((task-timeout))
+        params:
+          TEST_TOOLCHAIN: 15
+          <<: *build-project-task-params
      on_failure:
        do:
          - put: repo-status-jdk15-build
@@ -324,14 +272,45 @@ jobs:
              <<: *slack-fail-params
    - put: repo-status-jdk15-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:
+          <<: *build-project-task-params
+      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:
-    - get: spring-framework-ci-image
+    - get: ci-image
    - get: git-repo
      trigger: false
    - task: stage
-      image: spring-framework-ci-image
+      image: ci-image
      file: git-repo/ci/tasks/stage-version.yml
      params:
        RELEASE_TYPE: M
@@ -346,7 +325,7 @@ jobs:
 - name: promote-milestone
  serial: true
  plan:
-    - get: spring-framework-ci-image
+    - get: ci-image
    - get: git-repo
      trigger: false
    - get: artifactory-repo
@@ -356,7 +335,7 @@ jobs:
        download_artifacts: false
        save_build_info: true
    - task: promote
-      image: spring-framework-ci-image
+      image: ci-image
      file: git-repo/ci/tasks/promote-version.yml
      params:
        RELEASE_TYPE: M
@@ -372,11 +351,11 @@ jobs:
 - name: stage-rc
  serial: true
  plan:
-    - get: spring-framework-ci-image
+    - get: ci-image
    - get: git-repo
      trigger: false
    - task: stage
-      image: spring-framework-ci-image
+      image: ci-image
      file: git-repo/ci/tasks/stage-version.yml
      params:
        RELEASE_TYPE: RC
@@ -391,7 +370,7 @@ jobs:
 - name: promote-rc
  serial: true
  plan:
-    - get: spring-framework-ci-image
+    - get: ci-image
    - get: git-repo
      trigger: false
    - get: artifactory-repo
@@ -401,7 +380,7 @@ jobs:
        download_artifacts: false
        save_build_info: true
    - task: promote
-      image: spring-framework-ci-image
+      image: ci-image
      file: git-repo/ci/tasks/promote-version.yml
      params:
        RELEASE_TYPE: RC
@@ -417,11 +396,11 @@ jobs:
 - name: stage-release
  serial: true
  plan:
-    - get: spring-framework-ci-image
+    - get: ci-image
    - get: git-repo
      trigger: false
    - task: stage
-      image: spring-framework-ci-image
+      image: ci-image
      file: git-repo/ci/tasks/stage-version.yml
      params:
        RELEASE_TYPE: RELEASE
@@ -436,26 +415,26 @@ jobs:
 - name: promote-release
  serial: true
  plan:
-    - get: spring-framework-ci-image
+    - get: ci-image
    - get: git-repo
      trigger: false
    - get: artifactory-repo
      trigger: false
      passed: [stage-release]
      params:
-        download_artifacts: false
+        download_artifacts: true
        save_build_info: true
    - task: promote
-      image: spring-framework-ci-image
+      image: ci-image
      file: git-repo/ci/tasks/promote-version.yml
      params:
        RELEASE_TYPE: RELEASE
        <<: *artifactory-task-params
-        <<: *bintray-task-params
- name: sync-to-maven-central
+        <<: *sonatype-task-params
+- name: create-github-release
  serial: true
  plan:
-    - get: spring-framework-ci-image
+    - get: ci-image
    - get: git-repo
    - get: artifactory-repo
      trigger: true
@@ -463,12 +442,6 @@ jobs:
      params:
        download_artifacts: false
        save_build_info: true
-    - task: sync-to-maven-central
-      image: spring-framework-ci-image
-      file: git-repo/ci/tasks/sync-to-maven-central.yml
-      params:
-        <<: *bintray-task-params
-        <<: *sonatype-task-params
    - task: generate-changelog
      file: git-repo/ci/tasks/generate-changelog.yml
      params:
@@ -480,8 +453,10 @@ jobs:

 groups:
 - name: "builds"
-  jobs: ["build", "jdk11-build", "jdk14-build", "jdk15-build"]
+  jobs: ["build", "jdk11-build", "jdk15-build"]
 - name: "releases"
-  jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone","promote-rc", "promote-release", "sync-to-maven-central"]
+  jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone", "promote-rc", "promote-release", "create-github-release"]
 - name: "ci-images"
-  jobs: ["build-spring-framework-ci-images"]
+  jobs: ["build-ci-images"]
+- name: "pull-requests"
+  jobs: [ "build-pull-requests" ]
@@ -0,0 +1,8 @@
+#!/bin/bash
+set -e
+
+source $(dirname $0)/common.sh
+
+pushd git-repo > /dev/null
+./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --max-workers=4 check
+popd > /dev/null
@@ -4,5 +4,6 @@ set -e
 source $(dirname $0)/common.sh

 pushd git-repo > /dev/null
-./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --max-workers=4 check
+./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false -Porg.gradle.java.installations.fromEnv=JDK11,JDK15 \
+  -PmainToolchain=${MAIN_TOOLCHAIN} -PtestToolchain=${TEST_TOOLCHAIN} --no-daemon --max-workers=4 check
 popd > /dev/null
@@ -2,7 +2,7 @@
 set -e

 CONFIG_DIR=git-repo/ci/config
-version=$( cat version/version )
+version=$( cat artifactory-repo/build-info.json | jq -r '.buildInfo.modules[0].id' | sed 's/.*:.*:\(.*\)/\1/' )

 java -jar /github-changelog-generator.jar \
  --spring.config.location=${CONFIG_DIR}/changelog-generator.yml \
@@ -6,11 +6,13 @@ CONFIG_DIR=git-repo/ci/config
 version=$( cat artifactory-repo/build-info.json | jq -r '.buildInfo.modules[0].id' | sed 's/.*:.*:\(.*\)/\1/' )
 export BUILD_INFO_LOCATION=$(pwd)/artifactory-repo/build-info.json

-java -jar /opt/concourse-release-scripts.jar promote $RELEASE_TYPE $BUILD_INFO_LOCATION > /dev/null || { exit 1; }
+java -jar /opt/concourse-release-scripts.jar \
+  --spring.config.location=${CONFIG_DIR}/release-scripts.yml \
+  publishToCentral $RELEASE_TYPE $BUILD_INFO_LOCATION artifactory-repo || { exit 1; }

 java -jar /opt/concourse-release-scripts.jar \
  --spring.config.location=${CONFIG_DIR}/release-scripts.yml \
-  distribute $RELEASE_TYPE $BUILD_INFO_LOCATION > /dev/null || { exit 1; }
+  promote $RELEASE_TYPE $BUILD_INFO_LOCATION || { exit 1; }

 echo "Promotion complete"
 echo $version > version/version
@@ -0,0 +1,19 @@
+---
+platform: linux
+inputs:
+- name: git-repo
+caches:
+- path: gradle
+params:
+  BRANCH:
+  CI: true
+  GRADLE_ENTERPRISE_ACCESS_KEY:
+  GRADLE_ENTERPRISE_CACHE_USERNAME:
+  GRADLE_ENTERPRISE_CACHE_PASSWORD:
+  GRADLE_ENTERPRISE_URL: https://ge.spring.io
+run:
+  path: bash
+  args:
+    - -ec
+    - |
+      ${PWD}/git-repo/ci/scripts/build-pr.sh
@@ -10,6 +10,8 @@ caches:
 params:
  BRANCH:
  CI: true
+  MAIN_TOOLCHAIN:
+  TEST_TOOLCHAIN:
  GRADLE_ENTERPRISE_ACCESS_KEY:
  GRADLE_ENTERPRISE_CACHE_USERNAME:
  GRADLE_ENTERPRISE_CACHE_PASSWORD:
@@ -1,13 +1,13 @@
 ---
 platform: linux
 image_resource:
-  type: docker-image
+  type: registry-image
  source:
    repository: springio/github-changelog-generator
-    tag: '0.0.4'
+    tag: '0.0.6'
 inputs:
 - name: git-repo
- name: version
+- name: artifactory-repo
 outputs:
 - name: generated-changelog
 params:
@@ -10,9 +10,9 @@ params:
  ARTIFACTORY_SERVER:
  ARTIFACTORY_USERNAME:
  ARTIFACTORY_PASSWORD:
-  BINTRAY_SUBJECT:
-  BINTRAY_REPO:
-  BINTRAY_USERNAME:
-  BINTRAY_API_KEY:
+  SONATYPE_USER:
+  SONATYPE_PASSWORD:
+  SONATYPE_URL:
+  SONATYPE_STAGING_PROFILE_ID:
 run:
  path: git-repo/ci/scripts/promote-version.sh
@@ -1,16 +0,0 @@
---
-platform: linux
-inputs:
- name: git-repo
- name: artifactory-repo
-outputs:
- name: version
-params:
-  BINTRAY_REPO:
-  BINTRAY_SUBJECT:
-  BINTRAY_USERNAME:
-  BINTRAY_API_KEY:
-  SONATYPE_USER_TOKEN:
-  SONATYPE_PASSWORD_TOKEN:
-run:
-  path: git-repo/ci/scripts/sync-to-maven-central.sh
@@ -1,4 +1,4 @@
-version=5.3.1-SNAPSHOT
+version=5.3.8
 org.gradle.jvmargs=-Xmx1536M
 org.gradle.caching=true
 org.gradle.parallel=true
@@ -1,80 +0,0 @@
-// -----------------------------------------------------------------------------
-//
-// This script adds support for the following two JVM system properties
-// that control the build for alternative JDKs (i.e., a JDK other than
-// the one used to launch the Gradle process).
-//
-// - customJavaHome: absolute path to the alternate JDK installation to
-//     use to compile Java code and execute tests. This system property
-//     is also used in spring-oxm.gradle to determine whether JiBX is
-//     supported.
-//
-// - customJavaSourceVersion: Java version supplied to the `--release`
-//     command line flag to control the Java source and target
-//     compatibility version. Supported versions include 9 or higher.
-//     Do not set this system property if Java 8 should be used.
-//
-// Examples:
-//
-// ./gradlew -DcustomJavaHome=/Library/Java/JavaVirtualMachines/jdk-14.jdk/Contents/Home test
-//
-// ./gradlew --no-build-cache -DcustomJavaHome=/Library/Java/JavaVirtualMachines/jdk-14.jdk/Contents/Home test
-//
-// ./gradlew -DcustomJavaHome=/Library/Java/JavaVirtualMachines/jdk-14.jdk/Contents/Home -DcustomJavaSourceVersion=14 test
-//
-//
-// Credits: inspired by work from Marc Philipp and Stephane Nicoll
-//
-// -----------------------------------------------------------------------------
-
-import org.gradle.internal.os.OperatingSystem
-// import org.jetbrains.kotlin.gradle.dsl.KotlinJvmCompile
-
-def customJavaHome = System.getProperty("customJavaHome")
-
-if (customJavaHome) {
-	def customJavaHomeDir = new File(customJavaHome)
-	def customJavaSourceVersion = System.getProperty("customJavaSourceVersion")
-
-	tasks.withType(JavaCompile) {
-		logger.info("Java home for " + it.name + " task in " + project.name + ": " + customJavaHomeDir)
-		options.forkOptions.javaHome = customJavaHomeDir
-		inputs.property("customJavaHome", customJavaHome)
-		if (customJavaSourceVersion) {
-			options.compilerArgs += [ "--release", customJavaSourceVersion]
-			inputs.property("customJavaSourceVersion", customJavaSourceVersion)
-		}
-	}
-
-	tasks.withType(GroovyCompile) {
-		logger.info("Java home for " + it.name + " task in " + project.name + ": " + customJavaHomeDir)
-		options.forkOptions.javaHome = customJavaHomeDir
-		inputs.property("customJavaHome", customJavaHome)
-		if (customJavaSourceVersion) {
-			options.compilerArgs += [ "--release", customJavaSourceVersion]
-			inputs.property("customJavaSourceVersion", customJavaSourceVersion)
-		}
-	}
-
-	/*
-	tasks.withType(KotlinJvmCompile) {
-		logger.info("Java home for " + it.name + " task in " + project.name + ": " + customJavaHome)
-		kotlinOptions.jdkHome = customJavaHomeDir
-		inputs.property("customJavaHome", customJavaHome)
-	}
-	*/
-
-	tasks.withType(Test) {
-		def javaExecutable = customJavaHome + "/bin/java"
-		if (OperatingSystem.current().isWindows()) {
-			javaExecutable += ".exe"
-		}
-		logger.info("Java executable for " + it.name + " task in " + project.name + ": " + javaExecutable)
-		executable = javaExecutable
-		inputs.property("customJavaHome", customJavaHome)
-		if (customJavaSourceVersion) {
-			inputs.property("customJavaSourceVersion", customJavaSourceVersion)
-		}
-	}
-
-}
@@ -3,7 +3,7 @@ configurations {
 }

 dependencies {
-	asciidoctorExt("io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:0.4.3.RELEASE")
+	asciidoctorExt("io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:0.5.0")
 }

 repositories {
@@ -113,7 +113,7 @@ dokka {
 }

 task downloadResources(type: Download) {
-	def version = "0.2.2.RELEASE"
+	def version = "0.2.5"
 	src "https://repo.spring.io/release/io/spring/docresources/" +
 			"spring-doc-resources/$version/spring-doc-resources-${version}.zip"
 	dest project.file("$buildDir/docs/spring-doc-resources.zip")
@@ -143,7 +143,8 @@ asciidoctorj {
 			'highlightjs-theme': 'googlecode',
 			stylesdir: 'css/',
 			stylesheet: 'stylesheet.css',
-			'spring-version': project.version
+			'spring-version': project.version,
+			'spring-framework-main-code': 'https://github.com/spring-projects/spring-framework/tree/main'
 	])
 }

@@ -29,12 +29,11 @@ eclipse.classpath.file.whenMerged { classpath ->
 	classpath.entries.removeAll { entry -> (entry.path =~ /(?!.*?repack.*\.jar).*?\/([^\/]+)\/build\/libs\/[^\/]+\.jar/) }
 }

-
 // Use separate main/test outputs (prevents WTP from packaging test classes)
 eclipse.classpath.defaultOutputDir = file(project.name+"/bin/eclipse")
 eclipse.classpath.file.beforeMerged { classpath ->
 	classpath.entries.findAll{ it instanceof SourceFolder }.each {
-		if(it.output.startsWith("bin/")) {
+		if (it.output.startsWith("bin/")) {
 			it.output = null
 		}
 	}
@@ -56,6 +55,15 @@ eclipse.classpath.file.whenMerged { classpath ->
 	}
 }

+// Ensure that JMH sources and resources are treated as test classpath entries
+// so that they can see test fixtures.
+// https://github.com/melix/jmh-gradle-plugin/issues/157
+eclipse.classpath.file.whenMerged {
+	entries.findAll { it.path =~ /src\/jmh\/(java|resources)/ }.each {
+		it.entryAttributes['test'] = 'true'
+	}
+}
+
 // Allow projects to be used as WTP modules
 eclipse.project.natures "org.eclipse.wst.common.project.facet.core.nature"

@@ -100,21 +108,3 @@ task eclipseBuildship(type: Copy) {
 tasks["eclipseJdt"].dependsOn(eclipseJdtPrepare)
 tasks["cleanEclipse"].dependsOn(cleanEclipseJdtUi)
 tasks["eclipse"].dependsOn(eclipseSettings, eclipseWstComponent)
-
-
-// Filter 'build' folder
-eclipse.project.file.withXml {
-	def node = it.asNode()
-
-	def filteredResources = node.get("filteredResources")
-	if(filteredResources) {
-		node.remove(filteredResources)
-	}
-	def filterNode = node.appendNode("filteredResources").appendNode("filter")
-	filterNode.appendNode("id", "1359048889071")
-	filterNode.appendNode("name", "")
-	filterNode.appendNode("type", "30")
-	def matcherNode = filterNode.appendNode("matcher")
-	matcherNode.appendNode("id", "org.eclipse.ui.ide.multiFilter")
-	matcherNode.appendNode("arguments", "1.0-projectRelativePath-matches-false-false-build")
-}
@@ -1,17 +1,38 @@
+apply plugin: 'java-library'
 apply plugin: 'org.springframework.build.compile'
 apply plugin: 'org.springframework.build.optional-dependencies'
-apply plugin: 'me.champeau.gradle.jmh'
+// Uncomment the following for Shadow support in the jmhJar block.
+// Currently commented out due to ZipException: archive is not a ZIP archive
+// apply plugin: 'com.github.johnrengelman.shadow'
+apply plugin: 'me.champeau.jmh'
 apply from: "$rootDir/gradle/publications.gradle"

 dependencies {
-	jmh 'org.openjdk.jmh:jmh-core:1.23'
-	jmh 'org.openjdk.jmh:jmh-generator-annprocess:1.23'
+	jmh 'org.openjdk.jmh:jmh-core:1.28'
+	jmh 'org.openjdk.jmh:jmh-generator-annprocess:1.28'
 	jmh 'net.sf.jopt-simple:jopt-simple:4.6'
 }
+
 jmh {
 	duplicateClassesStrategy = DuplicatesStrategy.EXCLUDE
 }

+jmhJar {
+	// Uncomment the following for Shadow's Transformer support.
+	// mergeServiceFiles()
+	// append('META-INF/spring.handlers')
+	// append('META-INF/spring.schemas')
+	// append('META-INF/spring.tooling')
+	exclude 'LICENSE'
+	exclude 'THIRD-PARTY'
+	exclude 'META-INF/license.txt'
+	exclude 'META-INF/notice.txt'
+	exclude 'META-INF/DEPENDENCIES'
+	exclude 'META-INF/LICENSE*'
+	exclude 'META-INF/NOTICE'
+	exclude 'META-INF/THIRD-PARTY'
+}
+
 jar {
 	manifest.attributes["Implementation-Title"] = project.name
 	manifest.attributes["Implementation-Version"] = project.version
@@ -0,0 +1,182 @@
+/**
+ * Apply the JVM Toolchain conventions
+ * See https://docs.gradle.org/current/userguide/toolchains.html
+ *
+ * One can choose the toolchain to use for compiling the MAIN sources and/or compiling
+ * and running the TEST sources. These options apply to Java, Kotlin and Groovy sources
+ * when available.
+ * {@code "./gradlew check -PmainToolchain=8 -PtestToolchain=11"} will use:
+ * <ul>
+ *     <li>a JDK8 toolchain for compiling the main SourceSet
+ *     <li>a JDK11 toolchain for compiling and running the test SourceSet
+ * </ul>
+ *
+ * By default, the build will fall back to using the current JDK and 1.8 language level for all sourceSets.
+ *
+ * Gradle will automatically detect JDK distributions in well-known locations.
+ * The following command will list the detected JDKs on the host.
+ * {@code
+ * $ ./gradlew -q javaToolchains
+ * }
+ *
+ * We can also configure ENV variables and let Gradle know about them:
+ * {@code
+ * $ echo JDK11
+ * /opt/openjdk/java11
+ * $ echo JDK15
+ * /opt/openjdk/java15
+ * $ ./gradlew -Porg.gradle.java.installations.fromEnv=JDK11,JDK15 check
+ * }
+ *
+ * @author Brian Clozel
+ * @author Sam Brannen
+ */
+
+def mainToolchainConfigured() {
+	return project.hasProperty('mainToolchain') && project.mainToolchain
+}
+
+def testToolchainConfigured() {
+	return project.hasProperty('testToolchain') && project.testToolchain
+}
+
+def mainToolchainLanguageVersion() {
+	if (mainToolchainConfigured()) {
+		return JavaLanguageVersion.of(project.mainToolchain.toString())
+	}
+	return JavaLanguageVersion.of(8)
+}
+
+def testToolchainLanguageVersion() {
+	if (testToolchainConfigured()) {
+		return JavaLanguageVersion.of(project.testToolchain.toString())
+	}
+	return mainToolchainLanguageVersion()
+}
+
+plugins.withType(JavaPlugin) {
+	// Configure the Java Toolchain if the 'mainToolchain' is configured
+	if (mainToolchainConfigured()) {
+		java {
+			toolchain {
+				languageVersion = mainToolchainLanguageVersion()
+			}
+		}
+	}
+	else {
+		// Fallback to JDK8
+		java {
+			sourceCompatibility = JavaVersion.VERSION_1_8
+		}
+	}
+	// Configure a specific Java Toolchain for compiling and running tests if the 'testToolchain' property is defined
+	if (testToolchainConfigured()) {
+		def testLanguageVersion = testToolchainLanguageVersion()
+		tasks.withType(JavaCompile).matching { it.name.contains("Test") }.configureEach {
+			javaCompiler = javaToolchains.compilerFor {
+				languageVersion = testLanguageVersion
+			}
+		}
+		tasks.withType(Test).configureEach{
+			javaLauncher = javaToolchains.launcherFor {
+				languageVersion = testLanguageVersion
+			}
+		}
+	}
+}
+
+plugins.withType(GroovyPlugin) {
+	// Fallback to JDK8
+	if (!mainToolchainConfigured()) {
+		compileGroovy {
+			sourceCompatibility = JavaVersion.VERSION_1_8
+		}
+	}
+}
+
+pluginManager.withPlugin("kotlin") {
+	// Configure the Kotlin compiler if the 'mainToolchain' property is defined
+	if (mainToolchainConfigured()) {
+		def mainLanguageVersion = mainToolchainLanguageVersion()
+		def compiler = javaToolchains.compilerFor {
+			languageVersion = mainLanguageVersion
+		}
+		// See https://kotlinlang.org/docs/gradle.html#attributes-specific-for-jvm
+		def javaVersion = mainLanguageVersion.toString() == '8' ? '1.8' : mainLanguageVersion.toString()
+		compileKotlin {
+			kotlinOptions {
+				jvmTarget = javaVersion
+				jdkHome = compiler.get().metadata.installationPath.asFile.absolutePath
+			}
+		}
+		// Compile the test classes with the same version, 'testToolchain' will override if defined
+		compileTestKotlin {
+			kotlinOptions {
+				jvmTarget = javaVersion
+				jdkHome = compiler.get().metadata.installationPath.asFile.absolutePath
+			}
+		}
+	}
+	else {
+		// Fallback to JDK8
+		compileKotlin {
+			kotlinOptions {
+				jvmTarget = '1.8'
+			}
+		}
+		compileTestKotlin {
+			kotlinOptions {
+				jvmTarget = '1.8'
+			}
+		}
+	}
+
+	if (testToolchainConfigured()) {
+		def testLanguageVersion = testToolchainLanguageVersion()
+		def compiler = javaToolchains.compilerFor {
+			languageVersion = testLanguageVersion
+		}
+		// See https://kotlinlang.org/docs/gradle.html#attributes-specific-for-jvm
+		def javaVersion = testLanguageVersion.toString() == '8' ? '1.8' : testLanguageVersion.toString()
+		compileTestKotlin {
+			kotlinOptions {
+				jvmTarget = javaVersion
+				jdkHome = compiler.get().metadata.installationPath.asFile.absolutePath
+			}
+		}
+	}
+}
+
+// Configure the JMH plugin to use the toolchain for generating and running JMH bytecode
+pluginManager.withPlugin("me.champeau.jmh") {
+	if (mainToolchainConfigured() || testToolchainConfigured()) {
+		tasks.matching { it.name.contains('jmh') && it.hasProperty('javaLauncher') }.configureEach {
+			javaLauncher.set(javaToolchains.launcherFor {
+				languageVersion.set(testToolchainLanguageVersion())
+			})
+		}
+		tasks.withType(JavaCompile).matching { it.name.contains("Jmh") }.configureEach {
+			javaCompiler = javaToolchains.compilerFor {
+				languageVersion = testToolchainLanguageVersion()
+			}
+		}
+	}
+}
+
+// Store resolved Toolchain JVM information as custom values in the build scan.
+rootProject.ext {
+	resolvedMainToolchain = false
+	resolvedTestToolchain = false
+}
+gradle.taskGraph.afterTask { Task task, TaskState state ->
+	if (mainToolchainConfigured() && !resolvedMainToolchain && task instanceof JavaCompile && task.javaCompiler.isPresent()) {
+		def metadata = task.javaCompiler.get().metadata
+		task.project.buildScan.value('Main toolchain', "$metadata.vendor $metadata.languageVersion ($metadata.installationPath)")
+		resolvedMainToolchain = true
+	}
+	if (testToolchainConfigured() && !resolvedTestToolchain && task instanceof Test && task.javaLauncher.isPresent()) {
+		def metadata = task.javaLauncher.get().metadata
+		task.project.buildScan.value('Test toolchain', "$metadata.vendor $metadata.languageVersion ($metadata.installationPath)")
+		resolvedTestToolchain = true
+	}
+}
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
@@ -6,8 +6,8 @@ pluginManagement {
 }

 plugins {
-	id "com.gradle.enterprise" version "3.2"
-	id "io.spring.gradle-enterprise-conventions" version "0.0.2"
+	id "com.gradle.enterprise" version "3.6.1"
+	id "io.spring.ge.conventions" version "0.0.7"
 }

 include "spring-aop"
@@ -45,12 +45,6 @@ rootProject.children.each {project ->
 settings.gradle.projectsLoaded {
 	gradleEnterprise {
 		buildScan {
-			if (settings.gradle.rootProject.hasProperty('customJavaHome')) {
-				value("Custom JAVA_HOME", settings.gradle.rootProject.getProperty('customJavaHome'))
-			}
-			if (settings.gradle.rootProject.hasProperty('customJavaSourceVersion')) {
-				value("Custom Java Source Version", settings.gradle.rootProject.getProperty('customJavaSourceVersion'))
-			}
 			File buildDir = settings.gradle.rootProject.getBuildDir()
 			buildDir.mkdirs()
 			new File(buildDir, "build-scan-uri.txt").text = "(build scan not generated)"
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -26,7 +26,7 @@ import org.aopalliance.aop.Advice;
 * <p>Introductions are often <b>mixins</b>, enabling the building of composite
 * objects that can achieve many of the goals of multiple inheritance in Java.
 *
- * <p>Compared to {qlink IntroductionInfo}, this interface allows an advice to
+ * <p>Compared to {@link IntroductionInfo}, this interface allows an advice to
 * implement a range of interfaces that is not necessarily known in advance.
 * Thus an {@link IntroductionAdvisor} can be used to specify which interfaces
 * will be exposed in an advised object.
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -350,17 +350,8 @@ public abstract class AbstractAspectJAdvice implements Advice, AspectJPrecedence
 		return this.discoveredThrowingType;
 	}

-	private boolean isVariableName(String name) {
-		char[] chars = name.toCharArray();
-		if (!Character.isJavaIdentifierStart(chars[0])) {
-			return false;
-		}
-		for (int i = 1; i < chars.length; i++) {
-			if (!Character.isJavaIdentifierPart(chars[i])) {
-				return false;
-			}
-		}
-		return true;
+	private static boolean isVariableName(String name) {
+		return AspectJProxyUtils.isVariableName(name);
 	}


@@ -640,7 +631,6 @@ public abstract class AbstractAspectJAdvice implements Advice, AspectJPrecedence
 		}
 		try {
 			ReflectionUtils.makeAccessible(this.aspectJAdviceMethod);
-			// TODO AopUtils.invokeJoinpointUsingReflection
 			return this.aspectJAdviceMethod.invoke(this.aspectInstanceFactory.getAspectInstance(), actualArgs);
 		}
 		catch (IllegalArgumentException ex) {
@@ -470,22 +470,10 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 	 */
 	@Nullable
 	private String maybeExtractVariableName(@Nullable String candidateToken) {
-		if (!StringUtils.hasLength(candidateToken)) {
-			return null;
-		}
-		if (Character.isJavaIdentifierStart(candidateToken.charAt(0)) &&
-				Character.isLowerCase(candidateToken.charAt(0))) {
-			char[] tokenChars = candidateToken.toCharArray();
-			for (char tokenChar : tokenChars) {
-				if (!Character.isJavaIdentifierPart(tokenChar)) {
-					return null;
-				}
-			}
+		if (AspectJProxyUtils.isVariableName(candidateToken)) {
 			return candidateToken;
 		}
-		else {
-			return null;
-		}
+		return null;
 	}

 	/**
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.util.List;
 import org.springframework.aop.Advisor;
 import org.springframework.aop.PointcutAdvisor;
 import org.springframework.aop.interceptor.ExposeInvocationInterceptor;
+import org.springframework.lang.Nullable;
+import org.springframework.util.StringUtils;

 /**
 * Utility methods for working with AspectJ proxies.
@@ -73,4 +75,19 @@ public abstract class AspectJProxyUtils {
 						((PointcutAdvisor) advisor).getPointcut() instanceof AspectJExpressionPointcut));
 	}

+	static boolean isVariableName(@Nullable String name) {
+		if (!StringUtils.hasLength(name)) {
+			return false;
+		}
+		if (!Character.isJavaIdentifierStart(name.charAt(0))) {
+			return false;
+		}
+		for (int i = 1; i < name.length(); i++) {
+			if (!Character.isJavaIdentifierPart(name.charAt(i))) {
+				return false;
+			}
+		}
+		return true;
+	}
+
 }
@@ -51,6 +51,7 @@ import org.springframework.core.convert.converter.Converter;
 import org.springframework.core.convert.converter.ConvertingComparator;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ReflectionUtils;
+import org.springframework.util.ReflectionUtils.MethodFilter;
 import org.springframework.util.StringUtils;
 import org.springframework.util.comparator.InstanceComparator;

@@ -70,7 +71,11 @@ import org.springframework.util.comparator.InstanceComparator;
@SuppressWarnings("serial")
 public class ReflectiveAspectJAdvisorFactory extends AbstractAspectJAdvisorFactory implements Serializable {

-	private static final Comparator<Method> METHOD_COMPARATOR;
+	// Exclude @Pointcut methods
+	private static final MethodFilter adviceMethodFilter = ReflectionUtils.USER_DECLARED_METHODS
+			.and(method -> (AnnotationUtils.getAnnotation(method, Pointcut.class) == null));
+
+	private static final Comparator<Method> adviceMethodComparator;

 	static {
 		// Note: although @After is ordered before @AfterReturning and @AfterThrowing,
@@ -86,7 +91,7 @@ public class ReflectiveAspectJAdvisorFactory extends AbstractAspectJAdvisorFacto
 					return (ann != null ? ann.getAnnotation() : null);
 				});
 		Comparator<Method> methodNameComparator = new ConvertingComparator<>(Method::getName);
-		METHOD_COMPARATOR = adviceKindComparator.thenComparing(methodNameComparator);
+		adviceMethodComparator = adviceKindComparator.thenComparing(methodNameComparator);
 	}


@@ -160,15 +165,10 @@ public class ReflectiveAspectJAdvisorFactory extends AbstractAspectJAdvisorFacto
 	}

 	private List<Method> getAdvisorMethods(Class<?> aspectClass) {
-		final List<Method> methods = new ArrayList<>();
-		ReflectionUtils.doWithMethods(aspectClass, method -> {
-			// Exclude pointcuts
-			if (AnnotationUtils.getAnnotation(method, Pointcut.class) == null) {
-				methods.add(method);
-			}
-		}, ReflectionUtils.USER_DECLARED_METHODS);
+		List<Method> methods = new ArrayList<>();
+		ReflectionUtils.doWithMethods(aspectClass, methods::add, adviceMethodFilter);
 		if (methods.size() > 1) {
-			methods.sort(METHOD_COMPARATOR);
+			methods.sort(adviceMethodComparator);
 		}
 		return methods;
 	}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -22,6 +22,7 @@ import java.util.concurrent.ConcurrentHashMap;
 import org.springframework.aop.Advisor;
 import org.springframework.aop.support.AopUtils;
 import org.springframework.beans.factory.config.BeanPostProcessor;
+import org.springframework.core.SmartClassLoader;
 import org.springframework.lang.Nullable;

 /**
@@ -89,7 +90,13 @@ public abstract class AbstractAdvisingBeanPostProcessor extends ProxyProcessorSu
 			}
 			proxyFactory.addAdvisor(this.advisor);
 			customizeProxyFactory(proxyFactory);
-			return proxyFactory.getProxy(getProxyClassLoader());
+
+			// Use original ClassLoader if bean class not locally loaded in overriding class loader
+			ClassLoader classLoader = getProxyClassLoader();
+			if (classLoader instanceof SmartClassLoader && classLoader != bean.getClass().getClassLoader()) {
+				classLoader = ((SmartClassLoader) classLoader).getOriginalClassLoader();
+			}
+			return proxyFactory.getProxy(classLoader);
 		}

 		// No proxy needed.
@@ -48,6 +48,7 @@ import org.springframework.cglib.proxy.Factory;
 import org.springframework.cglib.proxy.MethodInterceptor;
 import org.springframework.cglib.proxy.MethodProxy;
 import org.springframework.cglib.proxy.NoOp;
+import org.springframework.core.KotlinDetector;
 import org.springframework.core.SmartClassLoader;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
@@ -752,10 +753,17 @@ class CglibAopProxy implements AopProxy, Serializable {
 				throw ex;
 			}
 			catch (Exception ex) {
-				if (ReflectionUtils.declaresException(getMethod(), ex.getClass())) {
+				if (ReflectionUtils.declaresException(getMethod(), ex.getClass()) ||
+						KotlinDetector.isKotlinType(getMethod().getDeclaringClass())) {
+					// Propagate original exception if declared on the target method
+					// (with callers expecting it). Always propagate it for Kotlin code
+					// since checked exceptions do not have to be explicitly declared there.
 					throw ex;
 				}
 				else {
+					// Checked exception thrown in the interceptor but not declared on the
+					// target method signature -> apply an UndeclaredThrowableException,
+					// aligned with standard JDK dynamic proxy behavior.
 					throw new UndeclaredThrowableException(ex);
 				}
 			}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2021 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.Serializable;
 import java.lang.reflect.Proxy;

 import org.springframework.aop.SpringProxy;
+import org.springframework.core.NativeDetector;

 /**
 * Default {@link AopProxyFactory} implementation, creating either a CGLIB proxy
@@ -47,17 +48,10 @@ import org.springframework.aop.SpringProxy;
@SuppressWarnings("serial")
 public class DefaultAopProxyFactory implements AopProxyFactory, Serializable {

-	/**
-	 * Whether this environment lives within a native image.
-	 * Exposed as a private static field rather than in a {@code NativeImageDetector.inNativeImage()} static method due to https://github.com/oracle/graal/issues/2594.
-	 * @see <a href="https://github.com/oracle/graal/blob/master/sdk/src/org.graalvm.nativeimage/src/org/graalvm/nativeimage/ImageInfo.java">ImageInfo.java</a>
-	 */
-	private static final boolean IN_NATIVE_IMAGE = (System.getProperty("org.graalvm.nativeimage.imagecode") != null);
-

 	@Override
 	public AopProxy createAopProxy(AdvisedSupport config) throws AopConfigException {
-		if (!IN_NATIVE_IMAGE &&
+		if (!NativeDetector.inNativeImage() &&
 				(config.isOptimize() || config.isProxyTargetClass() || hasNoUserSuppliedProxyInterfaces(config))) {
 			Class<?> targetClass = config.getTargetClass();
 			if (targetClass == null) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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 @@ import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.config.ConfigurableBeanFactory;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.beans.factory.config.SmartInstantiationAwareBeanPostProcessor;
+import org.springframework.core.SmartClassLoader;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
@@ -458,7 +459,12 @@ public abstract class AbstractAutoProxyCreator extends ProxyProcessorSupport
 			proxyFactory.setPreFiltered(true);
 		}

-		return proxyFactory.getProxy(getProxyClassLoader());
+		// Use original ClassLoader if bean class not locally loaded in overriding class loader
+		ClassLoader classLoader = getProxyClassLoader();
+		if (classLoader instanceof SmartClassLoader && classLoader != beanClass.getClassLoader()) {
+			classLoader = ((SmartClassLoader) classLoader).getOriginalClassLoader();
+		}
+		return proxyFactory.getProxy(classLoader);
 	}

 	/**
@@ -503,7 +509,10 @@ public abstract class AbstractAutoProxyCreator extends ProxyProcessorSupport

 		List<Object> allInterceptors = new ArrayList<>();
 		if (specificInterceptors != null) {
-			allInterceptors.addAll(Arrays.asList(specificInterceptors));
+			if (specificInterceptors.length > 0) {
+				// specificInterceptors may equal PROXY_WITHOUT_ADDITIONAL_INTERCEPTORS
+				allInterceptors.addAll(Arrays.asList(specificInterceptors));
+			}
 			if (commonInterceptors.length > 0) {
 				if (this.applyCommonInterceptorsFirst) {
 					allInterceptors.addAll(0, Arrays.asList(commonInterceptors));
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -116,7 +116,7 @@ public abstract class AbstractPoolingTargetSource extends AbstractPrototypeBased


 	/**
-	 * Return an IntroductionAdvisor that providing a mixin
+	 * Return an IntroductionAdvisor that provides a mixin
 	 * exposing statistics about the pool maintained by this object.
 	 */
 	public DefaultIntroductionAdvisor getPoolingConfigMixin() {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -59,7 +59,8 @@ public abstract aspect AbstractTransactionAspect extends TransactionAspectSuppor

 	@Override
 	public void destroy() {
-		clearTransactionManagerCache(); // An aspect is basically a singleton
+		// An aspect is basically a singleton -> cleanup on destruction
+		clearTransactionManagerCache();
 	}

 	@SuppressAjWarnings("adviceDidNotMatch")
@@ -23,8 +23,6 @@ sourceSets {
 }

 compileGroovy {
-	sourceCompatibility = 1.8
-	targetCompatibility = 1.8
 	options.compilerArgs += "-Werror"
 }

@@ -1,14 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "https://www.springframework.org/dtd/spring-beans-2.0.dtd">
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd">

-<beans>
-
-  <bean id="bean1" class="org.springframework.beans.factory.ConcurrentBeanFactoryTests$ConcurrentBean"
+  <bean id="bean1" class="org.springframework.beans.factory.ConcurrentBeanFactoryBenchmark$ConcurrentBean"
 			scope="prototype">
    <property name="date" value="2004/08/08"/>
  </bean>

-  <bean id="bean2" class="org.springframework.beans.factory.ConcurrentBeanFactoryTests$ConcurrentBean"
+  <bean id="bean2" class="org.springframework.beans.factory.ConcurrentBeanFactoryBenchmark$ConcurrentBean"
 			scope="prototype">
    <property name="date" value="2000/02/02"/>
  </bean>
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -305,8 +305,10 @@ public abstract class AbstractNestablePropertyAccessor extends AbstractPropertyA
 					Class<?> componentType = propValue.getClass().getComponentType();
 					Object newArray = Array.newInstance(componentType, arrayIndex + 1);
 					System.arraycopy(propValue, 0, newArray, 0, length);
-					setPropertyValue(tokens.actualName, newArray);
-					propValue = getPropertyValue(tokens.actualName);
+					int lastKeyIndex = tokens.canonicalName.lastIndexOf('[');
+					String propName = tokens.canonicalName.substring(0, lastKeyIndex);
+					setPropertyValue(propName, newArray);
+					propValue = getPropertyValue(propName);
 				}
 				Array.set(propValue, arrayIndex, convertedValue);
 			}
@@ -268,10 +268,7 @@ public abstract class BeanUtils {
 	public static <T> Constructor<T> findPrimaryConstructor(Class<T> clazz) {
 		Assert.notNull(clazz, "Class must not be null");
 		if (KotlinDetector.isKotlinReflectPresent() && KotlinDetector.isKotlinType(clazz)) {
-			Constructor<T> kotlinPrimaryConstructor = KotlinDelegate.findPrimaryConstructor(clazz);
-			if (kotlinPrimaryConstructor != null) {
-				return kotlinPrimaryConstructor;
-			}
+			return KotlinDelegate.findPrimaryConstructor(clazz);
 		}
 		return null;
 	}
@@ -543,6 +540,7 @@ public abstract class BeanUtils {
 		if (targetType == null || targetType.isArray() || unknownEditorTypes.contains(targetType)) {
 			return null;
 		}
+
 		ClassLoader cl = targetType.getClassLoader();
 		if (cl == null) {
 			try {
@@ -559,28 +557,34 @@ public abstract class BeanUtils {
 				return null;
 			}
 		}
+
 		String targetTypeName = targetType.getName();
 		String editorName = targetTypeName + "Editor";
 		try {
 			Class<?> editorClass = cl.loadClass(editorName);
-			if (!PropertyEditor.class.isAssignableFrom(editorClass)) {
-				if (logger.isInfoEnabled()) {
-					logger.info("Editor class [" + editorName +
-							"] does not implement [java.beans.PropertyEditor] interface");
+			if (editorClass != null) {
+				if (!PropertyEditor.class.isAssignableFrom(editorClass)) {
+					if (logger.isInfoEnabled()) {
+						logger.info("Editor class [" + editorName +
+								"] does not implement [java.beans.PropertyEditor] interface");
+					}
+					unknownEditorTypes.add(targetType);
+					return null;
 				}
-				unknownEditorTypes.add(targetType);
-				return null;
+				return (PropertyEditor) instantiateClass(editorClass);
 			}
-			return (PropertyEditor) instantiateClass(editorClass);
+			// Misbehaving ClassLoader returned null instead of ClassNotFoundException
+			// - fall back to unknown editor type registration below
 		}
 		catch (ClassNotFoundException ex) {
-			if (logger.isTraceEnabled()) {
-				logger.trace("No property editor [" + editorName + "] found for type " +
-						targetTypeName + " according to 'Editor' suffix convention");
-			}
-			unknownEditorTypes.add(targetType);
-			return null;
+			// Ignore - fall back to unknown editor type registration below
 		}
+		if (logger.isTraceEnabled()) {
+			logger.trace("No property editor [" + editorName + "] found for type " +
+					targetTypeName + " according to 'Editor' suffix convention");
+		}
+		unknownEditorTypes.add(targetType);
+		return null;
 	}

 	/**
@@ -772,7 +776,14 @@ public abstract class BeanUtils {
 					if (readMethod != null) {
 						ResolvableType sourceResolvableType = ResolvableType.forMethodReturnType(readMethod);
 						ResolvableType targetResolvableType = ResolvableType.forMethodParameter(writeMethod, 0);
-						if (targetResolvableType.isAssignableFrom(sourceResolvableType)) {
+
+						// 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) {
 							try {
 								if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {
 									readMethod.setAccessible(true);
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -41,10 +41,10 @@ public class TypeMismatchException extends PropertyAccessException {
 	private String propertyName;

 	@Nullable
-	private transient Object value;
+	private final transient Object value;

 	@Nullable
-	private Class<?> requiredType;
+	private final Class<?> requiredType;


 	/**
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -84,7 +84,7 @@ import org.springframework.lang.Nullable;
 * (only applicable when running in a web application context)
 * <li>{@code postProcessBeforeInitialization} methods of BeanPostProcessors
 * <li>InitializingBean's {@code afterPropertiesSet}
- * <li>a custom init-method definition
+ * <li>a custom {@code init-method} definition
 * <li>{@code postProcessAfterInitialization} methods of BeanPostProcessors
 * </ol>
 *
@@ -92,7 +92,7 @@ import org.springframework.lang.Nullable;
 * <ol>
 * <li>{@code postProcessBeforeDestruction} methods of DestructionAwareBeanPostProcessors
 * <li>DisposableBean's {@code destroy}
- * <li>a custom destroy-method definition
+ * <li>a custom {@code destroy-method} definition
 * </ol>
 *
 * @author Rod Johnson
@@ -102,6 +102,8 @@ import org.springframework.lang.Nullable;
 * @see BeanNameAware#setBeanName
 * @see BeanClassLoaderAware#setBeanClassLoader
 * @see BeanFactoryAware#setBeanFactory
+ * @see org.springframework.context.EnvironmentAware#setEnvironment
+ * @see org.springframework.context.EmbeddedValueResolverAware#setEmbeddedValueResolver
 * @see org.springframework.context.ResourceLoaderAware#setResourceLoader
 * @see org.springframework.context.ApplicationEventPublisherAware#setApplicationEventPublisher
 * @see org.springframework.context.MessageSourceAware#setMessageSource
@@ -111,6 +113,7 @@ import org.springframework.lang.Nullable;
 * @see InitializingBean#afterPropertiesSet
 * @see org.springframework.beans.factory.support.RootBeanDefinition#getInitMethodName
 * @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessAfterInitialization
+ * @see org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor#postProcessBeforeDestruction
 * @see DisposableBean#destroy
 * @see org.springframework.beans.factory.support.RootBeanDefinition#getDestroyMethodName
 */
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -628,45 +628,58 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 			Field field = (Field) this.member;
 			Object value;
 			if (this.cached) {
-				value = resolvedCachedArgument(beanName, this.cachedFieldValue);
+				try {
+					value = resolvedCachedArgument(beanName, this.cachedFieldValue);
+				}
+				catch (NoSuchBeanDefinitionException ex) {
+					// Unexpected removal of target bean for cached argument -> re-resolve
+					value = resolveFieldValue(field, bean, beanName);
+				}
 			}
 			else {
-				DependencyDescriptor desc = new DependencyDescriptor(field, this.required);
-				desc.setContainingClass(bean.getClass());
-				Set<String> autowiredBeanNames = new LinkedHashSet<>(1);
-				Assert.state(beanFactory != null, "No BeanFactory available");
-				TypeConverter typeConverter = beanFactory.getTypeConverter();
-				try {
-					value = beanFactory.resolveDependency(desc, beanName, autowiredBeanNames, typeConverter);
-				}
-				catch (BeansException ex) {
-					throw new UnsatisfiedDependencyException(null, beanName, new InjectionPoint(field), ex);
-				}
-				synchronized (this) {
-					if (!this.cached) {
-						Object cachedFieldValue = null;
-						if (value != null || this.required) {
-							cachedFieldValue = desc;
-							registerDependentBeans(beanName, autowiredBeanNames);
-							if (autowiredBeanNames.size() == 1) {
-								String autowiredBeanName = autowiredBeanNames.iterator().next();
-								if (beanFactory.containsBean(autowiredBeanName) &&
-										beanFactory.isTypeMatch(autowiredBeanName, field.getType())) {
-									cachedFieldValue = new ShortcutDependencyDescriptor(
-											desc, autowiredBeanName, field.getType());
-								}
-							}
-						}
-						this.cachedFieldValue = cachedFieldValue;
-						this.cached = true;
-					}
-				}
+				value = resolveFieldValue(field, bean, beanName);
 			}
 			if (value != null) {
 				ReflectionUtils.makeAccessible(field);
 				field.set(bean, value);
 			}
 		}
+
+		@Nullable
+		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);
+			Assert.state(beanFactory != null, "No BeanFactory available");
+			TypeConverter typeConverter = beanFactory.getTypeConverter();
+			Object value;
+			try {
+				value = beanFactory.resolveDependency(desc, beanName, autowiredBeanNames, typeConverter);
+			}
+			catch (BeansException ex) {
+				throw new UnsatisfiedDependencyException(null, beanName, new InjectionPoint(field), ex);
+			}
+			synchronized (this) {
+				if (!this.cached) {
+					Object cachedFieldValue = null;
+					if (value != null || this.required) {
+						cachedFieldValue = desc;
+						registerDependentBeans(beanName, autowiredBeanNames);
+						if (autowiredBeanNames.size() == 1) {
+							String autowiredBeanName = autowiredBeanNames.iterator().next();
+							if (beanFactory.containsBean(autowiredBeanName) &&
+									beanFactory.isTypeMatch(autowiredBeanName, field.getType())) {
+								cachedFieldValue = new ShortcutDependencyDescriptor(
+										desc, autowiredBeanName, field.getType());
+							}
+						}
+					}
+					this.cachedFieldValue = cachedFieldValue;
+					this.cached = true;
+				}
+			}
+			return value;
+		}
 	}


@@ -695,58 +708,16 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 			Method method = (Method) this.member;
 			Object[] arguments;
 			if (this.cached) {
-				// Shortcut for avoiding synchronization...
-				arguments = resolveCachedArguments(beanName);
+				try {
+					arguments = resolveCachedArguments(beanName);
+				}
+				catch (NoSuchBeanDefinitionException ex) {
+					// Unexpected removal of target bean for cached argument -> re-resolve
+					arguments = resolveMethodArguments(method, bean, beanName);
+				}
 			}
 			else {
-				int argumentCount = method.getParameterCount();
-				arguments = new Object[argumentCount];
-				DependencyDescriptor[] descriptors = new DependencyDescriptor[argumentCount];
-				Set<String> autowiredBeans = new LinkedHashSet<>(argumentCount);
-				Assert.state(beanFactory != null, "No BeanFactory available");
-				TypeConverter typeConverter = beanFactory.getTypeConverter();
-				for (int i = 0; i < arguments.length; i++) {
-					MethodParameter methodParam = new MethodParameter(method, i);
-					DependencyDescriptor currDesc = new DependencyDescriptor(methodParam, this.required);
-					currDesc.setContainingClass(bean.getClass());
-					descriptors[i] = currDesc;
-					try {
-						Object arg = beanFactory.resolveDependency(currDesc, beanName, autowiredBeans, typeConverter);
-						if (arg == null && !this.required) {
-							arguments = null;
-							break;
-						}
-						arguments[i] = arg;
-					}
-					catch (BeansException ex) {
-						throw new UnsatisfiedDependencyException(null, beanName, new InjectionPoint(methodParam), ex);
-					}
-				}
-				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();
-								Class<?>[] paramTypes = method.getParameterTypes();
-								for (int i = 0; i < paramTypes.length; i++) {
-									String autowiredBeanName = it.next();
-									if (beanFactory.containsBean(autowiredBeanName) &&
-											beanFactory.isTypeMatch(autowiredBeanName, paramTypes[i])) {
-										cachedMethodArguments[i] = new ShortcutDependencyDescriptor(
-												descriptors[i], autowiredBeanName, paramTypes[i]);
-									}
-								}
-							}
-							this.cachedMethodArguments = cachedMethodArguments;
-						}
-						else {
-							this.cachedMethodArguments = null;
-						}
-						this.cached = true;
-					}
-				}
+				arguments = resolveMethodArguments(method, bean, beanName);
 			}
 			if (arguments != null) {
 				try {
@@ -771,6 +742,59 @@ public class AutowiredAnnotationBeanPostProcessor implements SmartInstantiationA
 			}
 			return arguments;
 		}
+
+		@Nullable
+		private Object[] resolveMethodArguments(Method method, Object bean, @Nullable String beanName) {
+			int argumentCount = method.getParameterCount();
+			Object[] arguments = new Object[argumentCount];
+			DependencyDescriptor[] descriptors = new DependencyDescriptor[argumentCount];
+			Set<String> autowiredBeans = new LinkedHashSet<>(argumentCount);
+			Assert.state(beanFactory != null, "No BeanFactory available");
+			TypeConverter typeConverter = beanFactory.getTypeConverter();
+			for (int i = 0; i < arguments.length; i++) {
+				MethodParameter methodParam = new MethodParameter(method, i);
+				DependencyDescriptor currDesc = new DependencyDescriptor(methodParam, this.required);
+				currDesc.setContainingClass(bean.getClass());
+				descriptors[i] = currDesc;
+				try {
+					Object arg = beanFactory.resolveDependency(currDesc, beanName, autowiredBeans, typeConverter);
+					if (arg == null && !this.required) {
+						arguments = null;
+						break;
+					}
+					arguments[i] = arg;
+				}
+				catch (BeansException ex) {
+					throw new UnsatisfiedDependencyException(null, beanName, new InjectionPoint(methodParam), ex);
+				}
+			}
+			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();
+							Class<?>[] paramTypes = method.getParameterTypes();
+							for (int i = 0; i < paramTypes.length; i++) {
+								String autowiredBeanName = it.next();
+								if (beanFactory.containsBean(autowiredBeanName) &&
+										beanFactory.isTypeMatch(autowiredBeanName, paramTypes[i])) {
+									cachedMethodArguments[i] = new ShortcutDependencyDescriptor(
+											descriptors[i], autowiredBeanName, paramTypes[i]);
+								}
+							}
+						}
+						this.cachedMethodArguments = cachedMethodArguments;
+					}
+					else {
+						this.cachedMethodArguments = null;
+					}
+					this.cached = true;
+				}
+			}
+			return arguments;
+		}
 	}


@@ -141,8 +141,7 @@ public class InjectionMetadata {
 	 * Return an {@code InjectionMetadata} instance, possibly for empty elements.
 	 * @param elements the elements to inject (possibly empty)
 	 * @param clazz the target class
-	 * @return a new {@link #InjectionMetadata(Class, Collection)} instance,
-	 * or {@link #EMPTY} in case of no elements
+	 * @return a new {@link #InjectionMetadata(Class, Collection)} instance
 	 * @since 5.2
 	 */
 	public static InjectionMetadata forElements(Collection<InjectedElement> elements, Class<?> clazz) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -36,15 +36,16 @@ import org.springframework.util.StringValueResolver;
 * Example XML bean definition:
 *
 * <pre class="code">
- * &lt;bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"/&gt;
- *   &lt;property name="driverClassName" value="${driver}"/&gt;
- *   &lt;property name="url" value="jdbc:${dbname}"/&gt;
+ * &lt;bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"&gt;
+ *   &lt;property name="driverClassName" value="${driver}" /&gt;
+ *   &lt;property name="url" value="jdbc:${dbname}" /&gt;
 * &lt;/bean&gt;
 * </pre>
 *
 * Example properties file:
 *
- * <pre class="code">driver=com.mysql.jdbc.Driver
+ * <pre class="code">
+ * driver=com.mysql.jdbc.Driver
 * dbname=mysql:mydb</pre>
 *
 * Annotated bean definitions may take advantage of property replacement using
@@ -56,7 +57,8 @@ import org.springframework.util.StringValueResolver;
 * in bean references. Furthermore, placeholder values can also cross-reference
 * other placeholders, like:
 *
- * <pre class="code">rootPath=myrootdir
+ * <pre class="code">
+ * rootPath=myrootdir
 * subPath=${rootPath}/subdir</pre>
 *
 * In contrast to {@link PropertyOverrideConfigurer}, subclasses of this type allow
@@ -71,13 +73,13 @@ import org.springframework.util.StringValueResolver;
 *
 * <p>Default property values can be defined globally for each configurer instance
 * via the {@link #setProperties properties} property, or on a property-by-property basis
- * using the default value separator which is {@code ":"} by default and
- * customizable via {@link #setValueSeparator(String)}.
+ * using the value separator which is {@code ":"} by default and customizable via
+ * {@link #setValueSeparator(String)}.
 *
 * <p>Example XML property with default value:
 *
 * <pre class="code">
- *   <property name="url" value="jdbc:${dbname:defaultdb}"/>
+ *   &lt;property name="url" value="jdbc:${dbname:defaultdb}" /&gt;
 * </pre>
 *
 * @author Chris Beams
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -52,6 +52,7 @@ import org.springframework.util.StringUtils;
 * @author Dave Syer
 * @author Juergen Hoeller
 * @author Sam Brannen
+ * @author Brian Clozel
 * @since 4.1
 */
 public abstract class YamlProcessor {
@@ -128,10 +129,11 @@ public abstract class YamlProcessor {

 	/**
 	 * Set the supported types that can be loaded from YAML documents.
-	 * <p>If no supported types are configured, all types encountered in YAML
-	 * documents will be supported. If an unsupported type is encountered, an
-	 * {@link IllegalStateException} will be thrown when the corresponding YAML
-	 * node is processed.
+	 * <p>If no supported types are configured, only Java standard classes
+	 * (as defined in {@link org.yaml.snakeyaml.constructor.SafeConstructor})
+	 * encountered in YAML documents will be supported.
+	 * If an unsupported type is encountered, an {@link IllegalStateException}
+	 * will be thrown when the corresponding YAML node is processed.
 	 * @param supportedTypes the supported types, or an empty array to clear the
 	 * supported types
 	 * @since 5.1.16
@@ -182,12 +184,8 @@ public abstract class YamlProcessor {
 	protected Yaml createYaml() {
 		LoaderOptions loaderOptions = new LoaderOptions();
 		loaderOptions.setAllowDuplicateKeys(false);
-
-		if (!this.supportedTypes.isEmpty()) {
-			return new Yaml(new FilteringConstructor(loaderOptions), new Representer(),
-					new DumperOptions(), loaderOptions);
-		}
-		return new Yaml(loaderOptions);
+		return new Yaml(new FilteringConstructor(loaderOptions), new Representer(),
+				new DumperOptions(), loaderOptions);
 	}

 	private boolean process(MatchCallback callback, Yaml yaml, Resource resource) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -489,8 +489,8 @@ public class GroovyBeanDefinitionReader extends AbstractBeanDefinitionReader imp
 						resolveConstructorArguments(args, 2, hasClosureArgument ? args.length - 1 : args.length);
 				this.currentBeanDefinition = new GroovyBeanDefinitionWrapper(beanName, (Class<?>) args[1], constructorArgs);
 				Map<?, ?> namedArgs = (Map<?, ?>) args[0];
-				for (Object o : namedArgs.keySet()) {
-					String propName = (String) o;
+				for (Object key : namedArgs.keySet()) {
+					String propName = (String) key;
 					setProperty(propName, namedArgs.get(propName));
 				}
 			}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -73,6 +73,7 @@ import org.springframework.beans.factory.config.TypedStringValue;
 import org.springframework.core.DefaultParameterNameDiscoverer;
 import org.springframework.core.MethodParameter;
 import org.springframework.core.NamedThreadLocal;
+import org.springframework.core.NativeDetector;
 import org.springframework.core.ParameterNameDiscoverer;
 import org.springframework.core.PriorityOrdered;
 import org.springframework.core.ResolvableType;
@@ -123,14 +124,6 @@ import org.springframework.util.StringUtils;
 public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFactory
 		implements AutowireCapableBeanFactory {

-	/**
-	 * Whether this environment lives within a native image.
-	 * Exposed as a private static field rather than in a {@code NativeImageDetector.inNativeImage()} static method due to https://github.com/oracle/graal/issues/2594.
-	 * @see <a href="https://github.com/oracle/graal/blob/master/sdk/src/org.graalvm.nativeimage/src/org/graalvm/nativeimage/ImageInfo.java">ImageInfo.java</a>
-	 */
-	private static final boolean IN_NATIVE_IMAGE = (System.getProperty("org.graalvm.nativeimage.imagecode") != null);
-
-
 	/** Strategy for creating bean instances. */
 	private InstantiationStrategy instantiationStrategy;

@@ -184,7 +177,7 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
 		ignoreDependencyInterface(BeanNameAware.class);
 		ignoreDependencyInterface(BeanFactoryAware.class);
 		ignoreDependencyInterface(BeanClassLoaderAware.class);
-		if (IN_NATIVE_IMAGE) {
+		if (NativeDetector.inNativeImage()) {
 			this.instantiationStrategy = new SimpleInstantiationStrategy();
 		}
 		else {
@@ -1022,6 +1015,11 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
 				throw ex;
 			}
 			catch (BeanCreationException ex) {
+				// Don't swallow a linkage error since it contains a full stacktrace on
+				// first occurrence... and just a plain NoClassDefFoundError afterwards.
+				if (ex.contains(LinkageError.class)) {
+					throw ex;
+				}
 				// Instantiation failure, maybe too early...
 				if (logger.isDebugEnabled()) {
 					logger.debug("Bean creation exception on singleton FactoryBean type check: " + ex);
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -894,7 +894,7 @@ public abstract class AbstractBeanDefinition extends BeanMetadataAttributeAccess
 	}

 	/**
-	 * Return if there are property values values defined for this bean.
+	 * Return if there are property values defined for this bean.
 	 * @since 5.0.2
 	 */
 	@Override
@@ -1194,8 +1194,8 @@ public abstract class AbstractBeanDefinition extends BeanMetadataAttributeAccess
 				this.primary == that.primary &&
 				this.nonPublicAccessAllowed == that.nonPublicAccessAllowed &&
 				this.lenientConstructorResolution == that.lenientConstructorResolution &&
-				ObjectUtils.nullSafeEquals(this.constructorArgumentValues, that.constructorArgumentValues) &&
-				ObjectUtils.nullSafeEquals(this.propertyValues, that.propertyValues) &&
+				equalsConstructorArgumentValues(that) &&
+				equalsPropertyValues(that) &&
 				ObjectUtils.nullSafeEquals(this.methodOverrides, that.methodOverrides) &&
 				ObjectUtils.nullSafeEquals(this.factoryBeanName, that.factoryBeanName) &&
 				ObjectUtils.nullSafeEquals(this.factoryMethodName, that.factoryMethodName) &&
@@ -1208,12 +1208,30 @@ public abstract class AbstractBeanDefinition extends BeanMetadataAttributeAccess
 				super.equals(other));
 	}

+	private boolean equalsConstructorArgumentValues(AbstractBeanDefinition other) {
+		if (!hasConstructorArgumentValues()) {
+			return !other.hasConstructorArgumentValues();
+		}
+		return ObjectUtils.nullSafeEquals(this.constructorArgumentValues, other.constructorArgumentValues);
+	}
+
+	private boolean equalsPropertyValues(AbstractBeanDefinition other) {
+		if (!hasPropertyValues()) {
+			return !other.hasPropertyValues();
+		}
+		return ObjectUtils.nullSafeEquals(this.propertyValues, other.propertyValues);
+	}
+
 	@Override
 	public int hashCode() {
 		int hashCode = ObjectUtils.nullSafeHashCode(getBeanClassName());
 		hashCode = 29 * hashCode + ObjectUtils.nullSafeHashCode(this.scope);
-		hashCode = 29 * hashCode + ObjectUtils.nullSafeHashCode(this.constructorArgumentValues);
-		hashCode = 29 * hashCode + ObjectUtils.nullSafeHashCode(this.propertyValues);
+		if (hasConstructorArgumentValues()) {
+			hashCode = 29 * hashCode + ObjectUtils.nullSafeHashCode(this.constructorArgumentValues);
+		}
+		if (hasPropertyValues()) {
+			hashCode = 29 * hashCode + ObjectUtils.nullSafeHashCode(this.propertyValues);
+		}
 		hashCode = 29 * hashCode + ObjectUtils.nullSafeHashCode(this.factoryBeanName);
 		hashCode = 29 * hashCode + ObjectUtils.nullSafeHashCode(this.factoryMethodName);
 		hashCode = 29 * hashCode + super.hashCode();
@@ -250,7 +250,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 			throws BeansException {

 		String beanName = transformedBeanName(name);
-		Object bean;
+		Object beanInstance;

 		// Eagerly check singleton cache for manually registered singletons.
 		Object sharedInstance = getSingleton(beanName);
@@ -264,7 +264,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 					logger.trace("Returning cached instance of singleton bean '" + beanName + "'");
 				}
 			}
-			bean = getObjectForBeanInstance(sharedInstance, name, beanName, null);
+			beanInstance = getObjectForBeanInstance(sharedInstance, name, beanName, null);
 		}

 		else {
@@ -342,7 +342,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 							throw ex;
 						}
 					});
-					bean = getObjectForBeanInstance(sharedInstance, name, beanName, mbd);
+					beanInstance = getObjectForBeanInstance(sharedInstance, name, beanName, mbd);
 				}

 				else if (mbd.isPrototype()) {
@@ -355,7 +355,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 					finally {
 						afterPrototypeCreation(beanName);
 					}
-					bean = getObjectForBeanInstance(prototypeInstance, name, beanName, mbd);
+					beanInstance = getObjectForBeanInstance(prototypeInstance, name, beanName, mbd);
 				}

 				else {
@@ -377,7 +377,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 								afterPrototypeCreation(beanName);
 							}
 						});
-						bean = getObjectForBeanInstance(scopedInstance, name, beanName, mbd);
+						beanInstance = getObjectForBeanInstance(scopedInstance, name, beanName, mbd);
 					}
 					catch (IllegalStateException ex) {
 						throw new ScopeNotActiveException(beanName, scopeName, ex);
@@ -395,14 +395,19 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 			}
 		}

+		return adaptBeanInstance(name, beanInstance, requiredType);
+	}
+
+	@SuppressWarnings("unchecked")
+	<T> T adaptBeanInstance(String name, Object bean, @Nullable Class<?> requiredType) {
 		// Check if required type matches the type of the actual bean instance.
 		if (requiredType != null && !requiredType.isInstance(bean)) {
 			try {
-				T convertedBean = getTypeConverter().convertIfNecessary(bean, requiredType);
+				Object convertedBean = getTypeConverter().convertIfNecessary(bean, requiredType);
 				if (convertedBean == null) {
 					throw new BeanNotOfRequiredTypeException(name, requiredType, bean.getClass());
 				}
-				return convertedBean;
+				return (T) convertedBean;
 			}
 			catch (TypeMismatchException ex) {
 				if (logger.isTraceEnabled()) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -35,6 +35,7 @@ import org.springframework.cglib.proxy.Factory;
 import org.springframework.cglib.proxy.MethodInterceptor;
 import org.springframework.cglib.proxy.MethodProxy;
 import org.springframework.cglib.proxy.NoOp;
+import org.springframework.core.ResolvableType;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
@@ -244,8 +245,10 @@ public class CglibSubclassingInstantiationStrategy extends SimpleInstantiationSt
 				return (bean.equals(null) ? null : bean);
 			}
 			else {
-				return (argsToUse != null ? this.owner.getBean(method.getReturnType(), argsToUse) :
-						this.owner.getBean(method.getReturnType()));
+				// Find target bean matching the (potentially generic) method return type
+				ResolvableType genericReturnType = ResolvableType.forMethodReturnType(method);
+				return (argsToUse != null ? this.owner.getBeanProvider(genericReturnType).getObject(argsToUse) :
+						this.owner.getBeanProvider(genericReturnType).getObject());
 			}
 		}
 	}
@@ -67,6 +67,7 @@ import org.springframework.util.StringUtils;

 /**
 * Delegate for resolving constructors and factory methods.
+ *
 * <p>Performs constructor resolution through argument matching.
 *
 * @author Juergen Hoeller
@@ -85,7 +86,7 @@ class ConstructorResolver {
 	private static final Object[] EMPTY_ARGS = new Object[0];

 	/**
-	 * Marker for autowired arguments in a cached argument array, to be later replaced
+	 * 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();
@@ -149,7 +150,7 @@ class ConstructorResolver {
 				}
 			}
 			if (argsToResolve != null) {
-				argsToUse = resolvePreparedArguments(beanName, mbd, bw, constructorToUse, argsToResolve, true);
+				argsToUse = resolvePreparedArguments(beanName, mbd, bw, constructorToUse, argsToResolve);
 			}
 		}

@@ -410,6 +411,7 @@ class ConstructorResolver {
 			if (mbd.isSingleton() && this.beanFactory.containsSingleton(beanName)) {
 				throw new ImplicitlyAppearedSingletonException();
 			}
+			this.beanFactory.registerDependentBean(factoryBeanName, beanName);
 			factoryClass = factoryBean.getClass();
 			isStatic = false;
 		}
@@ -444,7 +446,7 @@ class ConstructorResolver {
 				}
 			}
 			if (argsToResolve != null) {
-				argsToUse = resolvePreparedArguments(beanName, mbd, bw, factoryMethodToUse, argsToResolve, true);
+				argsToUse = resolvePreparedArguments(beanName, mbd, bw, factoryMethodToUse, argsToResolve);
 			}
 		}

@@ -816,7 +818,7 @@ class ConstructorResolver {
 	 * Resolve the prepared arguments stored in the given bean definition.
 	 */
 	private Object[] resolvePreparedArguments(String beanName, RootBeanDefinition mbd, BeanWrapper bw,
-			Executable executable, Object[] argsToResolve, boolean fallback) {
+			Executable executable, Object[] argsToResolve) {

 		TypeConverter customConverter = this.beanFactory.getCustomTypeConverter();
 		TypeConverter converter = (customConverter != null ? customConverter : bw);
@@ -829,7 +831,7 @@ class ConstructorResolver {
 			Object argValue = argsToResolve[argIndex];
 			MethodParameter methodParam = MethodParameter.forExecutable(executable, argIndex);
 			if (argValue == autowiredArgumentMarker) {
-				argValue = resolveAutowiredArgument(methodParam, beanName, null, converter, fallback);
+				argValue = resolveAutowiredArgument(methodParam, beanName, null, converter, true);
 			}
 			else if (argValue instanceof BeanMetadataElement) {
 				argValue = valueResolver.resolveValueIfNecessary("constructor argument", argValue);
@@ -1231,8 +1231,7 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 		}

 		if (candidateNames.length == 1) {
-			String beanName = candidateNames[0];
-			return new NamedBeanHolder<>(beanName, (T) getBean(beanName, requiredType.toClass(), args));
+			return resolveNamedBean(candidateNames[0], requiredType, args);
 		}
 		else if (candidateNames.length > 1) {
 			Map<String, Object> candidates = CollectionUtils.newLinkedHashMap(candidateNames.length);
@@ -1251,8 +1250,11 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 			}
 			if (candidateName != null) {
 				Object beanInstance = candidates.get(candidateName);
-				if (beanInstance == null || beanInstance instanceof Class) {
-					beanInstance = getBean(candidateName, requiredType.toClass(), args);
+				if (beanInstance == null) {
+					return null;
+				}
+				if (beanInstance instanceof Class) {
+					return resolveNamedBean(candidateName, requiredType, args);
 				}
 				return new NamedBeanHolder<>(candidateName, (T) beanInstance);
 			}
@@ -1264,6 +1266,17 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 		return null;
 	}

+	@Nullable
+	private <T> NamedBeanHolder<T> resolveNamedBean(
+			String beanName, ResolvableType requiredType, @Nullable Object[] args) throws BeansException {
+
+		Object bean = getBean(beanName, null, args);
+		if (bean instanceof NullBean) {
+			return null;
+		}
+		return new NamedBeanHolder<T>(beanName, adaptBeanInstance(beanName, bean, requiredType.toClass()));
+	}
+
 	@Override
 	@Nullable
 	public Object resolveDependency(DependencyDescriptor descriptor, @Nullable String requestingBeanName,
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -119,14 +119,16 @@ class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {
 				}
 			}
 			else {
-				Class<?>[] paramTypes = destroyMethod.getParameterTypes();
-				if (paramTypes.length > 1) {
-					throw new BeanDefinitionValidationException("Method '" + destroyMethodName + "' of bean '" +
-							beanName + "' has more than one parameter - not supported as destroy method");
-				}
-				else if (paramTypes.length == 1 && boolean.class != paramTypes[0]) {
-					throw new BeanDefinitionValidationException("Method '" + destroyMethodName + "' of bean '" +
-							beanName + "' has a non-boolean parameter - not supported as destroy method");
+				if (destroyMethod.getParameterCount() > 0) {
+					Class<?>[] paramTypes = destroyMethod.getParameterTypes();
+					if (paramTypes.length > 1) {
+						throw new BeanDefinitionValidationException("Method '" + destroyMethodName + "' of bean '" +
+								beanName + "' has more than one parameter - not supported as destroy method");
+					}
+					else if (paramTypes.length == 1 && boolean.class != paramTypes[0]) {
+						throw new BeanDefinitionValidationException("Method '" + destroyMethodName + "' of bean '" +
+								beanName + "' has a non-boolean parameter - not supported as destroy method");
+					}
 				}
 				destroyMethod = ClassUtils.getInterfaceMethodIfPossible(destroyMethod);
 			}
@@ -170,66 +172,6 @@ class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {
 	}


-	/**
-	 * If the current value of the given beanDefinition's "destroyMethodName" property is
-	 * {@link AbstractBeanDefinition#INFER_METHOD}, then attempt to infer a destroy method.
-	 * Candidate methods are currently limited to public, no-arg methods named "close" or
-	 * "shutdown" (whether declared locally or inherited). The given BeanDefinition's
-	 * "destroyMethodName" is updated to be null if no such method is found, otherwise set
-	 * to the name of the inferred method. This constant serves as the default for the
-	 * {@code @Bean#destroyMethod} attribute and the value of the constant may also be
-	 * used in XML within the {@code <bean destroy-method="">} or {@code
-	 * <beans default-destroy-method="">} attributes.
-	 * <p>Also processes the {@link java.io.Closeable} and {@link java.lang.AutoCloseable}
-	 * interfaces, reflectively calling the "close" method on implementing beans as well.
-	 */
-	@Nullable
-	private String inferDestroyMethodIfNecessary(Object bean, RootBeanDefinition beanDefinition) {
-		String destroyMethodName = beanDefinition.getDestroyMethodName();
-		if (AbstractBeanDefinition.INFER_METHOD.equals(destroyMethodName) ||
-				(destroyMethodName == null && bean instanceof AutoCloseable)) {
-			// Only perform destroy method inference or Closeable detection
-			// in case of the bean not explicitly implementing DisposableBean
-			if (!(bean instanceof DisposableBean)) {
-				try {
-					return bean.getClass().getMethod(CLOSE_METHOD_NAME).getName();
-				}
-				catch (NoSuchMethodException ex) {
-					try {
-						return bean.getClass().getMethod(SHUTDOWN_METHOD_NAME).getName();
-					}
-					catch (NoSuchMethodException ex2) {
-						// no candidate destroy method found
-					}
-				}
-			}
-			return null;
-		}
-		return (StringUtils.hasLength(destroyMethodName) ? destroyMethodName : null);
-	}
-
-	/**
-	 * Search for all DestructionAwareBeanPostProcessors in the List.
-	 * @param processors the List to search
-	 * @return the filtered List of DestructionAwareBeanPostProcessors
-	 */
-	@Nullable
-	private List<DestructionAwareBeanPostProcessor> filterPostProcessors(
-			List<DestructionAwareBeanPostProcessor> processors, Object bean) {
-
-		List<DestructionAwareBeanPostProcessor> filteredPostProcessors = null;
-		if (!CollectionUtils.isEmpty(processors)) {
-			filteredPostProcessors = new ArrayList<>(processors.size());
-			for (DestructionAwareBeanPostProcessor processor : processors) {
-				if (processor.requiresDestruction(bean)) {
-					filteredPostProcessors.add(processor);
-				}
-			}
-		}
-		return filteredPostProcessors;
-	}
-
-
 	@Override
 	public void run() {
 		destroy();
@@ -384,12 +326,50 @@ class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {
 		if (bean instanceof DisposableBean || bean instanceof AutoCloseable) {
 			return true;
 		}
-		String destroyMethodName = beanDefinition.getDestroyMethodName();
-		if (AbstractBeanDefinition.INFER_METHOD.equals(destroyMethodName)) {
-			return (ClassUtils.hasMethod(bean.getClass(), CLOSE_METHOD_NAME) ||
-					ClassUtils.hasMethod(bean.getClass(), SHUTDOWN_METHOD_NAME));
+		return inferDestroyMethodIfNecessary(bean, beanDefinition) != null;
+	}
+
+
+	/**
+	 * If the current value of the given beanDefinition's "destroyMethodName" property is
+	 * {@link AbstractBeanDefinition#INFER_METHOD}, then attempt to infer a destroy method.
+	 * Candidate methods are currently limited to public, no-arg methods named "close" or
+	 * "shutdown" (whether declared locally or inherited). The given BeanDefinition's
+	 * "destroyMethodName" is updated to be null if no such method is found, otherwise set
+	 * to the name of the inferred method. This constant serves as the default for the
+	 * {@code @Bean#destroyMethod} attribute and the value of the constant may also be
+	 * used in XML within the {@code <bean destroy-method="">} or {@code
+	 * <beans default-destroy-method="">} attributes.
+	 * <p>Also processes the {@link java.io.Closeable} and {@link java.lang.AutoCloseable}
+	 * interfaces, reflectively calling the "close" method on implementing beans as well.
+	 */
+	@Nullable
+	private static String inferDestroyMethodIfNecessary(Object bean, RootBeanDefinition beanDefinition) {
+		String destroyMethodName = beanDefinition.resolvedDestroyMethodName;
+		if (destroyMethodName == null) {
+			destroyMethodName = beanDefinition.getDestroyMethodName();
+			if (AbstractBeanDefinition.INFER_METHOD.equals(destroyMethodName) ||
+					(destroyMethodName == null && bean instanceof AutoCloseable)) {
+				// Only perform destroy method inference or Closeable detection
+				// in case of the bean not explicitly implementing DisposableBean
+				destroyMethodName = null;
+				if (!(bean instanceof DisposableBean)) {
+					try {
+						destroyMethodName = bean.getClass().getMethod(CLOSE_METHOD_NAME).getName();
+					}
+					catch (NoSuchMethodException ex) {
+						try {
+							destroyMethodName = bean.getClass().getMethod(SHUTDOWN_METHOD_NAME).getName();
+						}
+						catch (NoSuchMethodException ex2) {
+							// no candidate destroy method found
+						}
+					}
+				}
+			}
+			beanDefinition.resolvedDestroyMethodName = (destroyMethodName != null ? destroyMethodName : "");
 		}
-		return StringUtils.hasLength(destroyMethodName);
+		return (StringUtils.hasLength(destroyMethodName) ? destroyMethodName : null);
 	}

 	/**
@@ -408,4 +388,25 @@ class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {
 		return false;
 	}

+	/**
+	 * Search for all DestructionAwareBeanPostProcessors in the List.
+	 * @param processors the List to search
+	 * @return the filtered List of DestructionAwareBeanPostProcessors
+	 */
+	@Nullable
+	private static List<DestructionAwareBeanPostProcessor> filterPostProcessors(
+			List<DestructionAwareBeanPostProcessor> processors, Object bean) {
+
+		List<DestructionAwareBeanPostProcessor> filteredPostProcessors = null;
+		if (!CollectionUtils.isEmpty(processors)) {
+			filteredPostProcessors = new ArrayList<>(processors.size());
+			for (DestructionAwareBeanPostProcessor processor : processors) {
+				if (processor.requiresDestruction(bean)) {
+					filteredPostProcessors.add(processor);
+				}
+			}
+		}
+		return filteredPostProcessors;
+	}
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -19,17 +19,25 @@ package org.springframework.beans.factory.support;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;

+import org.springframework.core.ResolvableType;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ObjectUtils;

 /**
- * Represents an override of a method that looks up an object in the same IoC context.
+ * Represents an override of a method that looks up an object in the same IoC context,
+ * either by bean name or by bean type (based on the declared method return type).
 *
- * <p>Methods eligible for lookup override must not have arguments.
+ * <p>Methods eligible for lookup override may declare arguments in which case the
+ * given arguments are passed to the bean retrieval operation.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @since 1.1
+ * @see org.springframework.beans.factory.BeanFactory#getBean(String)
+ * @see org.springframework.beans.factory.BeanFactory#getBean(Class)
+ * @see org.springframework.beans.factory.BeanFactory#getBean(String, Object...)
+ * @see org.springframework.beans.factory.BeanFactory#getBean(Class, Object...)
+ * @see org.springframework.beans.factory.BeanFactory#getBeanProvider(ResolvableType)
 */
 public class LookupOverride extends MethodOverride {

@@ -43,8 +51,8 @@ public class LookupOverride extends MethodOverride {
 	/**
 	 * Construct a new LookupOverride.
 	 * @param methodName the name of the method to override
-	 * @param beanName the name of the bean in the current {@code BeanFactory}
-	 * that the overridden method should return (may be {@code null})
+	 * @param beanName the name of the bean in the current {@code BeanFactory} that the
+	 * overridden method should return (may be {@code null} for type-based bean retrieval)
 	 */
 	public LookupOverride(String methodName, @Nullable String beanName) {
 		super(methodName);
@@ -53,9 +61,9 @@ public class LookupOverride extends MethodOverride {

 	/**
 	 * Construct a new LookupOverride.
-	 * @param method the method to override
-	 * @param beanName the name of the bean in the current {@code BeanFactory}
-	 * that the overridden method should return (may be {@code null})
+	 * @param method the method declaration to override
+	 * @param beanName the name of the bean in the current {@code BeanFactory} that the
+	 * overridden method should return (may be {@code null} for type-based bean retrieval)
 	 */
 	public LookupOverride(Method method, @Nullable String beanName) {
 		super(method.getName());
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -19,9 +19,8 @@ package org.springframework.beans.factory.support;
 import java.lang.reflect.Method;

 /**
- * Interface to be implemented by classes that can reimplement any method
- * on an IoC-managed object: the <b>Method Injection</b> form of
- * Dependency Injection.
+ * Interface to be implemented by classes that can reimplement any method on an
+ * IoC-managed object: the <b>Method Injection</b> form of Dependency Injection.
 *
 * <p>Such methods may be (but need not be) abstract, in which case the
 * container will create a concrete subclass to instantiate.
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -25,7 +25,7 @@ import org.springframework.util.Assert;
 import org.springframework.util.ObjectUtils;

 /**
- * Extension of MethodOverride that represents an arbitrary
+ * Extension of {@link MethodOverride} that represents an arbitrary
 * override of a method by the IoC container.
 *
 * <p>Any non-final method can be overridden, irrespective of its
@@ -45,7 +45,7 @@ public class ReplaceOverride extends MethodOverride {
 	/**
 	 * Construct a new ReplaceOverride.
 	 * @param methodName the name of the method to override
-	 * @param methodReplacerBeanName the bean name of the MethodReplacer
+	 * @param methodReplacerBeanName the bean name of the {@link MethodReplacer}
 	 */
 	public ReplaceOverride(String methodName, String methodReplacerBeanName) {
 		super(methodName);
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -86,6 +86,10 @@ public class RootBeanDefinition extends AbstractBeanDefinition {
 	@Nullable
 	volatile Method factoryMethodToIntrospect;

+	/** Package-visible field for caching a resolved destroy method name (also for inferred). */
+	@Nullable
+	volatile String resolvedDestroyMethodName;
+
 	/** Common lock for the four constructor fields below. */
 	final Object constructorArgumentLock = new Object();

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -23,9 +23,9 @@ import org.springframework.util.StringUtils;
 /**
 * Editor for {@code java.util.Locale}, to directly populate a Locale property.
 *
- * <p>Expects the same syntax as Locale's {@code toString}, i.e. language +
+ * <p>Expects the same syntax as Locale's {@code toString()}, i.e. language +
 * optionally country + optionally variant, separated by "_" (e.g. "en", "en_US").
- * Also accepts spaces as separators, as alternative to underscores.
+ * Also accepts spaces as separators, as an alternative to underscores.
 *
 * @author Juergen Hoeller
 * @since 26.05.2003
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -26,8 +26,8 @@ import java.nio.file.Paths;

 import org.springframework.core.io.Resource;
 import org.springframework.core.io.ResourceEditor;
-import org.springframework.core.io.ResourceLoader;
 import org.springframework.util.Assert;
+import org.springframework.util.ResourceUtils;

 /**
 * Editor for {@code java.nio.file.Path}, to directly populate a Path
@@ -74,7 +74,7 @@ public class PathEditor extends PropertyEditorSupport {

 	@Override
 	public void setAsText(String text) throws IllegalArgumentException {
-		boolean nioPathCandidate = !text.startsWith(ResourceLoader.CLASSPATH_URL_PREFIX);
+		boolean nioPathCandidate = !text.startsWith(ResourceUtils.CLASSPATH_URL_PREFIX);
 		if (nioPathCandidate && !text.startsWith("/")) {
 			try {
 				URI uri = new URI(text);
@@ -85,9 +85,13 @@ public class PathEditor extends PropertyEditorSupport {
 					return;
 				}
 			}
-			catch (URISyntaxException | FileSystemNotFoundException ex) {
-				// Not a valid URI (let's try as Spring resource location),
-				// or a URI scheme not registered for NIO (let's try URL
+			catch (URISyntaxException ex) {
+				// Not a valid URI; potentially a Windows-style path after
+				// a file prefix (let's try as Spring resource location)
+				nioPathCandidate = !text.startsWith(ResourceUtils.FILE_URL_PREFIX);
+			}
+			catch (FileSystemNotFoundException ex) {
+				// URI scheme not registered for NIO (let's try URL
 				// protocol handlers via Spring's resource mechanism).
 			}
 		}
@@ -97,7 +101,7 @@ public class PathEditor extends PropertyEditorSupport {
 		if (resource == null) {
 			setValue(null);
 		}
-		else if (!resource.exists() && nioPathCandidate) {
+		else if (nioPathCandidate && !resource.exists()) {
 			setValue(Paths.get(text).normalize());
 		}
 		else {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -44,8 +44,6 @@ public class PropertyComparator<T> implements Comparator<T> {

 	private final SortDefinition sortDefinition;

-	private final BeanWrapperImpl beanWrapper = new BeanWrapperImpl(false);
-

 	/**
 	 * Create a new PropertyComparator for the given SortDefinition.
@@ -115,8 +113,9 @@ public class PropertyComparator<T> implements Comparator<T> {
 		// (similar to JSTL EL). If the property doesn't exist in the
 		// first place, let the exception through.
 		try {
-			this.beanWrapper.setWrappedInstance(obj);
-			return this.beanWrapper.getPropertyValue(this.sortDefinition.getProperty());
+			BeanWrapperImpl beanWrapper = new BeanWrapperImpl(false);
+			beanWrapper.setWrappedInstance(obj);
+			return beanWrapper.getPropertyValue(this.sortDefinition.getProperty());
 		}
 		catch (BeansException ex) {
 			logger.debug("PropertyComparator could not access property - treating as null for sorting", ex);
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -19,12 +19,16 @@ package org.springframework.beans;
 import java.beans.Introspector;
 import java.beans.PropertyDescriptor;
 import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
 import java.net.URI;
 import java.net.URL;
 import java.time.DayOfWeek;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Date;
 import java.util.List;
 import java.util.Locale;
@@ -196,6 +200,29 @@ class BeanUtilsTests {
 		assertThat(longListHolder.getList()).isEmpty();
 	}

+	@Test  // gh-26531
+	void copyPropertiesIgnoresGenericsIfSourceOrTargetHasUnresolvableGenerics() throws Exception {
+		Order original = new Order("test", Arrays.asList("foo", "bar"));
+
+		// Create a Proxy that loses the generic type information for the getLineItems() method.
+		OrderSummary proxy = proxyOrder(original);
+		assertThat(OrderSummary.class.getDeclaredMethod("getLineItems").toGenericString())
+			.contains("java.util.List<java.lang.String>");
+		assertThat(proxy.getClass().getDeclaredMethod("getLineItems").toGenericString())
+			.contains("java.util.List")
+			.doesNotContain("<java.lang.String>");
+
+		// Ensure that our custom Proxy works as expected.
+		assertThat(proxy.getId()).isEqualTo("test");
+		assertThat(proxy.getLineItems()).containsExactly("foo", "bar");
+
+		// Copy from proxy to target.
+		Order target = new Order();
+		BeanUtils.copyProperties(proxy, target);
+		assertThat(target.getId()).isEqualTo("test");
+		assertThat(target.getLineItems()).containsExactly("foo", "bar");
+	}
+
 	@Test
 	void copyPropertiesWithEditable() throws Exception {
 		TestBean tb = new TestBean();
@@ -633,4 +660,77 @@ class BeanUtilsTests {
 		}
 	}

+	@SuppressWarnings("unused")
+	private static class Order {
+
+		private String id;
+		private List<String> lineItems;
+
+
+		Order() {
+		}
+
+		Order(String id, List<String> lineItems) {
+			this.id = id;
+			this.lineItems = lineItems;
+		}
+
+		public String getId() {
+			return id;
+		}
+
+		public void setId(String id) {
+			this.id = id;
+		}
+
+		public List<String> getLineItems() {
+			return this.lineItems;
+		}
+
+		public void setLineItems(List<String> lineItems) {
+			this.lineItems = lineItems;
+		}
+
+		@Override
+		public String toString() {
+			return "Order [id=" + this.id + ", lineItems=" + this.lineItems + "]";
+		}
+	}
+
+	private interface OrderSummary {
+
+		String getId();
+
+		List<String> getLineItems();
+	}
+
+
+	private OrderSummary proxyOrder(Order order) {
+		return (OrderSummary) Proxy.newProxyInstance(getClass().getClassLoader(),
+			new Class<?>[] { OrderSummary.class }, new OrderInvocationHandler(order));
+	}
+
+
+	private static class OrderInvocationHandler implements InvocationHandler {
+
+		private final Order order;
+
+
+		OrderInvocationHandler(Order order) {
+			this.order = order;
+		}
+
+		@Override
+		public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+			try {
+				// Ignore args since OrderSummary doesn't declare any methods with arguments,
+				// and we're not supporting equals(Object), etc.
+				return Order.class.getDeclaredMethod(method.getName()).invoke(this.order);
+			}
+			catch (InvocationTargetException ex) {
+				throw ex.getTargetException();
+			}
+		}
+	}
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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 static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 /**
 * @author Keith Donald
 * @author Juergen Hoeller
+ * @author Sam Brannen
 */
 public class BeanWrapperAutoGrowingTests {

@@ -66,11 +67,6 @@ public class BeanWrapperAutoGrowingTests {
 		assertThat(bean.getArray()[0]).isInstanceOf(Bean.class);
 	}

-	private void assertNotNull(Object propertyValue) {
-		assertThat(propertyValue).isNotNull();
-	}
-
-
 	@Test
 	public void setPropertyValueAutoGrowArray() {
 		wrapper.setPropertyValue("array[0].prop", "test");
@@ -93,12 +89,39 @@ public class BeanWrapperAutoGrowingTests {
 	}

 	@Test
-	public void getPropertyValueAutoGrowMultiDimensionalArray() {
+	public void getPropertyValueAutoGrow2dArray() {
 		assertNotNull(wrapper.getPropertyValue("multiArray[0][0]"));
 		assertThat(bean.getMultiArray()[0].length).isEqualTo(1);
 		assertThat(bean.getMultiArray()[0][0]).isInstanceOf(Bean.class);
 	}

+	@Test
+	public void getPropertyValueAutoGrow3dArray() {
+		assertNotNull(wrapper.getPropertyValue("threeDimensionalArray[1][2][3]"));
+		assertThat(bean.getThreeDimensionalArray()[1].length).isEqualTo(3);
+		assertThat(bean.getThreeDimensionalArray()[1][2][3]).isInstanceOf(Bean.class);
+	}
+
+	@Test
+	public void setPropertyValueAutoGrow2dArray() {
+		Bean newBean = new Bean();
+		newBean.setProp("enigma");
+		wrapper.setPropertyValue("multiArray[2][3]", newBean);
+		assertThat(bean.getMultiArray()[2][3])
+			.isInstanceOf(Bean.class)
+			.extracting(Bean::getProp).isEqualTo("enigma");
+	}
+
+	@Test
+	public void setPropertyValueAutoGrow3dArray() {
+		Bean newBean = new Bean();
+		newBean.setProp("enigma");
+		wrapper.setPropertyValue("threeDimensionalArray[2][3][4]", newBean);
+		assertThat(bean.getThreeDimensionalArray()[2][3][4])
+			.isInstanceOf(Bean.class)
+			.extracting(Bean::getProp).isEqualTo("enigma");
+	}
+
 	@Test
 	public void getPropertyValueAutoGrowList() {
 		assertNotNull(wrapper.getPropertyValue("list[0]"));
@@ -131,7 +154,7 @@ public class BeanWrapperAutoGrowingTests {
 	public void getPropertyValueAutoGrowListFailsAgainstLimit() {
 		wrapper.setAutoGrowCollectionLimit(2);
 		assertThatExceptionOfType(InvalidPropertyException.class).isThrownBy(() ->
-				assertNotNull(wrapper.getPropertyValue("list[4]")))
+				wrapper.getPropertyValue("list[4]"))
 			.withRootCauseInstanceOf(IndexOutOfBoundsException.class);
 	}

@@ -161,6 +184,11 @@ public class BeanWrapperAutoGrowingTests {
 	}


+	private static void assertNotNull(Object propertyValue) {
+		assertThat(propertyValue).isNotNull();
+	}
+
+
 	@SuppressWarnings("rawtypes")
 	public static class Bean {

@@ -174,6 +202,8 @@ public class BeanWrapperAutoGrowingTests {

 		private Bean[][] multiArray;

+		private Bean[][][] threeDimensionalArray;
+
 		private List<Bean> list;

 		private List<List<Bean>> multiList;
@@ -214,6 +244,14 @@ public class BeanWrapperAutoGrowingTests {
 			this.multiArray = multiArray;
 		}

+		public Bean[][][] getThreeDimensionalArray() {
+			return threeDimensionalArray;
+		}
+
+		public void setThreeDimensionalArray(Bean[][][] threeDimensionalArray) {
+			this.threeDimensionalArray = threeDimensionalArray;
+		}
+
 		public List<Bean> getList() {
 			return list;
 		}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -18,14 +18,14 @@ package org.springframework.beans;

 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
-import java.util.Collections;
-import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Properties;
 import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;

 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.junit.jupiter.api.RepeatedTest;
 import org.junit.jupiter.api.Test;

 import static org.assertj.core.api.Assertions.assertThat;
@@ -36,23 +36,21 @@ import static org.assertj.core.api.Assertions.assertThat;
 * @author Chris Beams
 * @since 08.03.2004
 */
-public class ConcurrentBeanWrapperTests {
+class ConcurrentBeanWrapperTests {

 	private final Log logger = LogFactory.getLog(getClass());

-	private Set<TestRun> set = Collections.synchronizedSet(new HashSet<TestRun>());
+	private final Set<TestRun> set = ConcurrentHashMap.newKeySet();

 	private Throwable ex = null;

-	@Test
-	public void testSingleThread() {
-		for (int i = 0; i < 100; i++) {
-			performSet();
-		}
+	@RepeatedTest(100)
+	void testSingleThread() {
+		performSet();
 	}

 	@Test
-	public void testConcurrent() {
+	void testConcurrent() {
 		for (int i = 0; i < 10; i++) {
 			TestRun run = new TestRun(this);
 			set.add(run);
@@ -82,7 +80,7 @@ public class ConcurrentBeanWrapperTests {

 		Properties p = (Properties) System.getProperties().clone();

-		assertThat(p.size() != 0).as("The System properties must not be empty").isTrue();
+		assertThat(p).as("The System properties must not be empty").isNotEmpty();

 		for (Iterator<?> i = p.entrySet().iterator(); i.hasNext();) {
 			i.next();
@@ -111,7 +109,7 @@ public class ConcurrentBeanWrapperTests {

 		private ConcurrentBeanWrapperTests test;

-		public TestRun(ConcurrentBeanWrapperTests test) {
+		TestRun(ConcurrentBeanWrapperTests test) {
 			this.test = test;
 		}

@@ -63,9 +63,8 @@ public class BeanFactoryUtilsTests {


 	@BeforeEach
-	public void setUp() {
+	public void setup() {
 		// Interesting hierarchical factory to test counts.
-		// Slow to read so we cache it.

 		DefaultListableBeanFactory grandParent = new DefaultListableBeanFactory();
 		new XmlBeanDefinitionReader(grandParent).loadBeanDefinitions(ROOT_CONTEXT);
@@ -93,7 +92,7 @@ public class BeanFactoryUtilsTests {
 	 * Check that override doesn't count as two separate beans.
 	 */
 	@Test
-	public void testHierarchicalCountBeansWithOverride() throws Exception {
+	public void testHierarchicalCountBeansWithOverride() {
 		// Leaf count
 		assertThat(this.listableBeanFactory.getBeanDefinitionCount() == 1).isTrue();
 		// Count minus duplicate
@@ -101,14 +100,14 @@ public class BeanFactoryUtilsTests {
 	}

 	@Test
-	public void testHierarchicalNamesWithNoMatch() throws Exception {
+	public void testHierarchicalNamesWithNoMatch() {
 		List<String> names = Arrays.asList(
 				BeanFactoryUtils.beanNamesForTypeIncludingAncestors(this.listableBeanFactory, NoOp.class));
 		assertThat(names.size()).isEqualTo(0);
 	}

 	@Test
-	public void testHierarchicalNamesWithMatchOnlyInRoot() throws Exception {
+	public void testHierarchicalNamesWithMatchOnlyInRoot() {
 		List<String> names = Arrays.asList(
 				BeanFactoryUtils.beanNamesForTypeIncludingAncestors(this.listableBeanFactory, IndexedTestBean.class));
 		assertThat(names.size()).isEqualTo(1);
@@ -118,7 +117,7 @@ public class BeanFactoryUtilsTests {
 	}

 	@Test
-	public void testGetBeanNamesForTypeWithOverride() throws Exception {
+	public void testGetBeanNamesForTypeWithOverride() {
 		List<String> names = Arrays.asList(
 				BeanFactoryUtils.beanNamesForTypeIncludingAncestors(this.listableBeanFactory, ITestBean.class));
 		// includes 2 TestBeans from FactoryBeans (DummyFactory definitions)
@@ -236,7 +235,7 @@ public class BeanFactoryUtilsTests {
 	}

 	@Test
-	public void testHierarchicalResolutionWithOverride() throws Exception {
+	public void testHierarchicalResolutionWithOverride() {
 		Object test3 = this.listableBeanFactory.getBean("test3");
 		Object test = this.listableBeanFactory.getBean("test");

@@ -276,14 +275,14 @@ public class BeanFactoryUtilsTests {
 	}

 	@Test
-	public void testHierarchicalNamesForAnnotationWithNoMatch() throws Exception {
+	public void testHierarchicalNamesForAnnotationWithNoMatch() {
 		List<String> names = Arrays.asList(
 				BeanFactoryUtils.beanNamesForAnnotationIncludingAncestors(this.listableBeanFactory, Override.class));
 		assertThat(names.size()).isEqualTo(0);
 	}

 	@Test
-	public void testHierarchicalNamesForAnnotationWithMatchOnlyInRoot() throws Exception {
+	public void testHierarchicalNamesForAnnotationWithMatchOnlyInRoot() {
 		List<String> names = Arrays.asList(
 				BeanFactoryUtils.beanNamesForAnnotationIncludingAncestors(this.listableBeanFactory, TestAnnotation.class));
 		assertThat(names.size()).isEqualTo(1);
@@ -293,7 +292,7 @@ public class BeanFactoryUtilsTests {
 	}

 	@Test
-	public void testGetBeanNamesForAnnotationWithOverride() throws Exception {
+	public void testGetBeanNamesForAnnotationWithOverride() {
 		AnnotatedBean annotatedBean = new AnnotatedBean();
 		this.listableBeanFactory.registerSingleton("anotherAnnotatedBean", annotatedBean);
 		List<String> names = Arrays.asList(
@@ -433,6 +432,7 @@ public class BeanFactoryUtilsTests {
 		String basePackage() default "";
 	}

+
 	@Retention(RetentionPolicy.RUNTIME)
 	@ControllerAdvice
 	@interface RestControllerAdvice {
@@ -444,18 +444,23 @@ public class BeanFactoryUtilsTests {
 		String basePackage() default "";
 	}

+
 	@ControllerAdvice("com.example")
 	static class ControllerAdviceClass {
 	}

+
 	@RestControllerAdvice("com.example")
 	static class RestControllerAdviceClass {
 	}

+
 	static class TestBeanSmartFactoryBean implements SmartFactoryBean<TestBean> {

 		private final TestBean testBean = new TestBean("enigma", 42);
+
 		private final boolean singleton;
+
 		private final boolean prototype;

 		TestBeanSmartFactoryBean(boolean singleton, boolean prototype) {
@@ -478,7 +483,7 @@ public class BeanFactoryUtilsTests {
 			return TestBean.class;
 		}

-		public TestBean getObject() throws Exception {
+		public TestBean getObject() {
 			// We don't really care if the actual instance is a singleton or prototype
 			// for the tests that use this factory.
 			return this.testBean;
@@ -785,12 +785,13 @@ class DefaultListableBeanFactoryTests {
 		factory.registerBeanDefinition("child", childDefinition);
 		factory.registerAlias("parent", "alias");

-		TestBean child = (TestBean) factory.getBean("child");
+		TestBean child = factory.getBean("child", TestBean.class);
 		assertThat(child.getName()).isEqualTo(EXPECTED_NAME);
 		assertThat(child.getAge()).isEqualTo(EXPECTED_AGE);
-		Object mergedBeanDefinition2 = factory.getMergedBeanDefinition("child");
+		BeanDefinition mergedBeanDefinition1 = factory.getMergedBeanDefinition("child");
+		BeanDefinition mergedBeanDefinition2 = factory.getMergedBeanDefinition("child");

-		assertThat(mergedBeanDefinition2).as("Use cached merged bean definition").isEqualTo(mergedBeanDefinition2);
+		assertThat(mergedBeanDefinition1).as("Use cached merged bean definition").isSameAs(mergedBeanDefinition2);
 	}

 	@Test
@@ -1838,8 +1839,7 @@ class DefaultListableBeanFactoryTests {
 		assertThat(factoryBean).as("The FactoryBean should have been registered.").isNotNull();
 		FactoryBeanDependentBean bean = (FactoryBeanDependentBean) lbf.autowire(FactoryBeanDependentBean.class,
 				AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true);
-		Object mergedBeanDefinition2 = bean.getFactoryBean();
-		assertThat(mergedBeanDefinition2).as("The FactoryBeanDependentBean should have been autowired 'by type' with the LazyInitFactory.").isEqualTo(mergedBeanDefinition2);
+		assertThat(bean.getFactoryBean()).as("The FactoryBeanDependentBean should have been autowired 'by type' with the LazyInitFactory.").isEqualTo(factoryBean);
 	}

 	@Test
@@ -2388,8 +2388,7 @@ class DefaultListableBeanFactoryTests {
 		BeanWithDestroyMethod.closeCount = 0;
 		lbf.preInstantiateSingletons();
 		lbf.destroySingletons();
-		Object mergedBeanDefinition2 = BeanWithDestroyMethod.closeCount;
-		assertThat(mergedBeanDefinition2).as("Destroy methods invoked").isEqualTo(mergedBeanDefinition2);
+		assertThat(BeanWithDestroyMethod.closeCount).as("Destroy methods invoked").isEqualTo(1);
 	}

 	@Test
@@ -2403,8 +2402,7 @@ class DefaultListableBeanFactoryTests {
 		BeanWithDestroyMethod.closeCount = 0;
 		lbf.preInstantiateSingletons();
 		lbf.destroySingletons();
-		Object mergedBeanDefinition2 = BeanWithDestroyMethod.closeCount;
-		assertThat(mergedBeanDefinition2).as("Destroy methods invoked").isEqualTo(mergedBeanDefinition2);
+		assertThat(BeanWithDestroyMethod.closeCount).as("Destroy methods invoked").isEqualTo(2);
 	}

 	@Test
@@ -2419,8 +2417,7 @@ class DefaultListableBeanFactoryTests {
 		BeanWithDestroyMethod.closeCount = 0;
 		lbf.preInstantiateSingletons();
 		lbf.destroySingletons();
-		Object mergedBeanDefinition2 = BeanWithDestroyMethod.closeCount;
-		assertThat(mergedBeanDefinition2).as("Destroy methods invoked").isEqualTo(mergedBeanDefinition2);
+		assertThat(BeanWithDestroyMethod.closeCount).as("Destroy methods invoked").isEqualTo(1);
 	}

 	@Test
@@ -2542,14 +2539,15 @@ class DefaultListableBeanFactoryTests {
 		factory.registerBeanDefinition("child", child);

 		AbstractBeanDefinition def = (AbstractBeanDefinition) factory.getBeanDefinition("child");
-		Object mergedBeanDefinition2 = def.getScope();
-		assertThat(mergedBeanDefinition2).as("Child 'scope' not overriding parent scope (it must).").isEqualTo(mergedBeanDefinition2);
+		assertThat(def.getScope()).as("Child 'scope' not overriding parent scope (it must).").isEqualTo(theChildScope);
 	}

 	@Test
 	void scopeInheritanceForChildBeanDefinitions() {
+		String theParentScope = "bonanza!";
+
 		RootBeanDefinition parent = new RootBeanDefinition();
-		parent.setScope("bonanza!");
+		parent.setScope(theParentScope);

 		AbstractBeanDefinition child = new ChildBeanDefinition("parent");
 		child.setBeanClass(TestBean.class);
@@ -2559,8 +2557,7 @@ class DefaultListableBeanFactoryTests {
 		factory.registerBeanDefinition("child", child);

 		BeanDefinition def = factory.getMergedBeanDefinition("child");
-		Object mergedBeanDefinition2 = def.getScope();
-		assertThat(mergedBeanDefinition2).as("Child 'scope' not inherited").isEqualTo(mergedBeanDefinition2);
+		assertThat(def.getScope()).as("Child 'scope' not inherited").isEqualTo(theParentScope);
 	}

 	@Test
@@ -2596,15 +2593,12 @@ class DefaultListableBeanFactoryTests {
 		});
 		lbf.preInstantiateSingletons();
 		TestBean tb = (TestBean) lbf.getBean("test");
-		Object mergedBeanDefinition2 = tb.getName();
-		assertThat(mergedBeanDefinition2).as("Name was set on field by IAPP").isEqualTo(mergedBeanDefinition2);
+		assertThat(tb.getName()).as("Name was set on field by IAPP").isEqualTo(nameSetOnField);
 		if (!skipPropertyPopulation) {
-			Object mergedBeanDefinition21 = tb.getAge();
-			assertThat(mergedBeanDefinition21).as("Property value still set").isEqualTo(mergedBeanDefinition21);
+			assertThat(tb.getAge()).as("Property value still set").isEqualTo(ageSetByPropertyValue);
 		}
 		else {
-			Object mergedBeanDefinition21 = tb.getAge();
-			assertThat(mergedBeanDefinition21).as("Property value was NOT set and still has default value").isEqualTo(mergedBeanDefinition21);
+			assertThat(tb.getAge()).as("Property value was NOT set and still has default value").isEqualTo(0);
 		}
 	}

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -297,6 +297,121 @@ public class AutowiredAnnotationBeanPostProcessorTests {
 		assertThat(bean.nestedTestBeansField[1]).isSameAs(ntb2);
 	}

+	@Test
+	public void testOptionalResourceInjectionWithSingletonRemoval() {
+		RootBeanDefinition rbd = new RootBeanDefinition(OptionalResourceInjectionBean.class);
+		rbd.setScope(BeanDefinition.SCOPE_PROTOTYPE);
+		bf.registerBeanDefinition("annotatedBean", rbd);
+		TestBean tb = new TestBean();
+		bf.registerSingleton("testBean", tb);
+		IndexedTestBean itb = new IndexedTestBean();
+		bf.registerSingleton("indexedTestBean", itb);
+		NestedTestBean ntb1 = new NestedTestBean();
+		bf.registerSingleton("nestedTestBean1", ntb1);
+		NestedTestBean ntb2 = new NestedTestBean();
+		bf.registerSingleton("nestedTestBean2", ntb2);
+
+		OptionalResourceInjectionBean bean = (OptionalResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isSameAs(tb);
+		assertThat(bean.getTestBean2()).isSameAs(tb);
+		assertThat(bean.getTestBean3()).isSameAs(tb);
+		assertThat(bean.getTestBean4()).isSameAs(tb);
+		assertThat(bean.getIndexedTestBean()).isSameAs(itb);
+		assertThat(bean.getNestedTestBeans().length).isEqualTo(2);
+		assertThat(bean.getNestedTestBeans()[0]).isSameAs(ntb1);
+		assertThat(bean.getNestedTestBeans()[1]).isSameAs(ntb2);
+		assertThat(bean.nestedTestBeansField.length).isEqualTo(2);
+		assertThat(bean.nestedTestBeansField[0]).isSameAs(ntb1);
+		assertThat(bean.nestedTestBeansField[1]).isSameAs(ntb2);
+
+		bf.destroySingleton("testBean");
+
+		bean = (OptionalResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isNull();
+		assertThat(bean.getTestBean2()).isNull();
+		assertThat(bean.getTestBean3()).isNull();
+		assertThat(bean.getTestBean4()).isNull();
+		assertThat(bean.getIndexedTestBean()).isSameAs(itb);
+		assertThat(bean.getNestedTestBeans().length).isEqualTo(2);
+		assertThat(bean.getNestedTestBeans()[0]).isSameAs(ntb1);
+		assertThat(bean.getNestedTestBeans()[1]).isSameAs(ntb2);
+		assertThat(bean.nestedTestBeansField.length).isEqualTo(2);
+		assertThat(bean.nestedTestBeansField[0]).isSameAs(ntb1);
+		assertThat(bean.nestedTestBeansField[1]).isSameAs(ntb2);
+
+		bf.registerSingleton("testBean", tb);
+
+		bean = (OptionalResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isSameAs(tb);
+		assertThat(bean.getTestBean2()).isSameAs(tb);
+		assertThat(bean.getTestBean3()).isSameAs(tb);
+		assertThat(bean.getTestBean4()).isSameAs(tb);
+		assertThat(bean.getIndexedTestBean()).isSameAs(itb);
+		assertThat(bean.getNestedTestBeans().length).isEqualTo(2);
+		assertThat(bean.getNestedTestBeans()[0]).isSameAs(ntb1);
+		assertThat(bean.getNestedTestBeans()[1]).isSameAs(ntb2);
+		assertThat(bean.nestedTestBeansField.length).isEqualTo(2);
+		assertThat(bean.nestedTestBeansField[0]).isSameAs(ntb1);
+		assertThat(bean.nestedTestBeansField[1]).isSameAs(ntb2);
+	}
+
+	@Test
+	public void testOptionalResourceInjectionWithBeanDefinitionRemoval() {
+		RootBeanDefinition rbd = new RootBeanDefinition(OptionalResourceInjectionBean.class);
+		rbd.setScope(BeanDefinition.SCOPE_PROTOTYPE);
+		bf.registerBeanDefinition("annotatedBean", rbd);
+		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));
+		IndexedTestBean itb = new IndexedTestBean();
+		bf.registerSingleton("indexedTestBean", itb);
+		NestedTestBean ntb1 = new NestedTestBean();
+		bf.registerSingleton("nestedTestBean1", ntb1);
+		NestedTestBean ntb2 = new NestedTestBean();
+		bf.registerSingleton("nestedTestBean2", ntb2);
+
+		OptionalResourceInjectionBean bean = (OptionalResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isSameAs(bf.getBean("testBean"));
+		assertThat(bean.getTestBean2()).isSameAs(bf.getBean("testBean"));
+		assertThat(bean.getTestBean3()).isSameAs(bf.getBean("testBean"));
+		assertThat(bean.getTestBean4()).isSameAs(bf.getBean("testBean"));
+		assertThat(bean.getIndexedTestBean()).isSameAs(itb);
+		assertThat(bean.getNestedTestBeans().length).isEqualTo(2);
+		assertThat(bean.getNestedTestBeans()[0]).isSameAs(ntb1);
+		assertThat(bean.getNestedTestBeans()[1]).isSameAs(ntb2);
+		assertThat(bean.nestedTestBeansField.length).isEqualTo(2);
+		assertThat(bean.nestedTestBeansField[0]).isSameAs(ntb1);
+		assertThat(bean.nestedTestBeansField[1]).isSameAs(ntb2);
+
+		bf.removeBeanDefinition("testBean");
+
+		bean = (OptionalResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isNull();
+		assertThat(bean.getTestBean2()).isNull();
+		assertThat(bean.getTestBean3()).isNull();
+		assertThat(bean.getTestBean4()).isNull();
+		assertThat(bean.getIndexedTestBean()).isSameAs(itb);
+		assertThat(bean.getNestedTestBeans().length).isEqualTo(2);
+		assertThat(bean.getNestedTestBeans()[0]).isSameAs(ntb1);
+		assertThat(bean.getNestedTestBeans()[1]).isSameAs(ntb2);
+		assertThat(bean.nestedTestBeansField.length).isEqualTo(2);
+		assertThat(bean.nestedTestBeansField[0]).isSameAs(ntb1);
+		assertThat(bean.nestedTestBeansField[1]).isSameAs(ntb2);
+
+		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));
+
+		bean = (OptionalResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isSameAs(bf.getBean("testBean"));
+		assertThat(bean.getTestBean2()).isSameAs(bf.getBean("testBean"));
+		assertThat(bean.getTestBean3()).isSameAs(bf.getBean("testBean"));
+		assertThat(bean.getTestBean4()).isSameAs(bf.getBean("testBean"));
+		assertThat(bean.getIndexedTestBean()).isSameAs(itb);
+		assertThat(bean.getNestedTestBeans().length).isEqualTo(2);
+		assertThat(bean.getNestedTestBeans()[0]).isSameAs(ntb1);
+		assertThat(bean.getNestedTestBeans()[1]).isSameAs(ntb2);
+		assertThat(bean.nestedTestBeansField.length).isEqualTo(2);
+		assertThat(bean.nestedTestBeansField[0]).isSameAs(ntb1);
+		assertThat(bean.nestedTestBeansField[1]).isSameAs(ntb2);
+	}
+
 	@Test
 	public void testOptionalCollectionResourceInjection() {
 		RootBeanDefinition rbd = new RootBeanDefinition(OptionalCollectionResourceInjectionBean.class);
@@ -533,6 +648,83 @@ public class AutowiredAnnotationBeanPostProcessorTests {
 		assertThat(bean.getBeanFactory()).isSameAs(bf);
 	}

+	@Test
+	public void testConstructorResourceInjectionWithSingletonRemoval() {
+		RootBeanDefinition bd = new RootBeanDefinition(ConstructorResourceInjectionBean.class);
+		bd.setScope(BeanDefinition.SCOPE_PROTOTYPE);
+		bf.registerBeanDefinition("annotatedBean", bd);
+		TestBean tb = new TestBean();
+		bf.registerSingleton("testBean", tb);
+		NestedTestBean ntb = new NestedTestBean();
+		bf.registerSingleton("nestedTestBean", ntb);
+
+		ConstructorResourceInjectionBean bean = (ConstructorResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isSameAs(tb);
+		assertThat(bean.getTestBean2()).isSameAs(tb);
+		assertThat(bean.getTestBean3()).isSameAs(tb);
+		assertThat(bean.getTestBean4()).isSameAs(tb);
+		assertThat(bean.getNestedTestBean()).isSameAs(ntb);
+		assertThat(bean.getBeanFactory()).isSameAs(bf);
+
+		bf.destroySingleton("nestedTestBean");
+
+		bean = (ConstructorResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isSameAs(tb);
+		assertThat(bean.getTestBean2()).isSameAs(tb);
+		assertThat(bean.getTestBean3()).isSameAs(tb);
+		assertThat(bean.getTestBean4()).isSameAs(tb);
+		assertThat(bean.getNestedTestBean()).isNull();
+		assertThat(bean.getBeanFactory()).isSameAs(bf);
+
+		bf.registerSingleton("nestedTestBean", ntb);
+
+		bean = (ConstructorResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isSameAs(tb);
+		assertThat(bean.getTestBean2()).isSameAs(tb);
+		assertThat(bean.getTestBean3()).isSameAs(tb);
+		assertThat(bean.getTestBean4()).isSameAs(tb);
+		assertThat(bean.getNestedTestBean()).isSameAs(ntb);
+		assertThat(bean.getBeanFactory()).isSameAs(bf);
+	}
+
+	@Test
+	public void testConstructorResourceInjectionWithBeanDefinitionRemoval() {
+		RootBeanDefinition bd = new RootBeanDefinition(ConstructorResourceInjectionBean.class);
+		bd.setScope(BeanDefinition.SCOPE_PROTOTYPE);
+		bf.registerBeanDefinition("annotatedBean", bd);
+		TestBean tb = new TestBean();
+		bf.registerSingleton("testBean", tb);
+		bf.registerBeanDefinition("nestedTestBean", new RootBeanDefinition(NestedTestBean.class));
+
+		ConstructorResourceInjectionBean bean = (ConstructorResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isSameAs(tb);
+		assertThat(bean.getTestBean2()).isSameAs(tb);
+		assertThat(bean.getTestBean3()).isSameAs(tb);
+		assertThat(bean.getTestBean4()).isSameAs(tb);
+		assertThat(bean.getNestedTestBean()).isSameAs(bf.getBean("nestedTestBean"));
+		assertThat(bean.getBeanFactory()).isSameAs(bf);
+
+		bf.removeBeanDefinition("nestedTestBean");
+
+		bean = (ConstructorResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isSameAs(tb);
+		assertThat(bean.getTestBean2()).isSameAs(tb);
+		assertThat(bean.getTestBean3()).isSameAs(tb);
+		assertThat(bean.getTestBean4()).isSameAs(tb);
+		assertThat(bean.getNestedTestBean()).isNull();
+		assertThat(bean.getBeanFactory()).isSameAs(bf);
+
+		bf.registerBeanDefinition("nestedTestBean", new RootBeanDefinition(NestedTestBean.class));
+
+		bean = (ConstructorResourceInjectionBean) bf.getBean("annotatedBean");
+		assertThat(bean.getTestBean()).isSameAs(tb);
+		assertThat(bean.getTestBean2()).isSameAs(tb);
+		assertThat(bean.getTestBean3()).isSameAs(tb);
+		assertThat(bean.getTestBean4()).isSameAs(tb);
+		assertThat(bean.getNestedTestBean()).isSameAs(bf.getBean("nestedTestBean"));
+		assertThat(bean.getBeanFactory()).isSameAs(bf);
+	}
+
 	@Test
 	public void testConstructorResourceInjectionWithNullFromFactoryBean() {
 		RootBeanDefinition bd = new RootBeanDefinition(ConstructorResourceInjectionBean.class);
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -121,6 +121,18 @@ public class LookupAnnotationTests {
 		assertThat(beanFactory.getBean(BeanConsumer.class).abstractBean).isSameAs(bean);
 	}

+	@Test
+	public void testWithGenericBean() {
+		beanFactory.registerBeanDefinition("numberBean", new RootBeanDefinition(NumberBean.class));
+		beanFactory.registerBeanDefinition("doubleStore", new RootBeanDefinition(DoubleStore.class));
+		beanFactory.registerBeanDefinition("floatStore", new RootBeanDefinition(FloatStore.class));
+
+		NumberBean bean = (NumberBean) beanFactory.getBean("numberBean");
+		assertThat(bean).isNotNull();
+		assertThat(beanFactory.getBean(DoubleStore.class)).isSameAs(bean.getDoubleStore());
+		assertThat(beanFactory.getBean(FloatStore.class)).isSameAs(bean.getFloatStore());
+	}
+

 	public static abstract class AbstractBean {

@@ -147,4 +159,26 @@ public class LookupAnnotationTests {
 		AbstractBean abstractBean;
 	}

+
+	public static class NumberStore<T extends Number> {
+	}
+
+
+	public static class DoubleStore extends NumberStore<Double> {
+	}
+
+
+	public static class FloatStore extends NumberStore<Float> {
+	}
+
+
+	public static abstract class NumberBean {
+
+		@Lookup
+		public abstract NumberStore<Double> getDoubleStore();
+
+		@Lookup
+		public abstract NumberStore<Float> getFloatStore();
+	}
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -17,9 +17,11 @@
 package org.springframework.beans.factory.config;

 import java.net.URL;
+import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;

 import org.junit.jupiter.api.Test;
 import org.yaml.snakeyaml.constructor.ConstructorException;
@@ -28,7 +30,6 @@ import org.yaml.snakeyaml.scanner.ScannerException;

 import org.springframework.core.io.ByteArrayResource;

-import static java.util.stream.Collectors.toList;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 import static org.assertj.core.api.Assertions.entry;
@@ -39,10 +40,12 @@ import static org.assertj.core.api.Assertions.entry;
 * @author Dave Syer
 * @author Juergen Hoeller
 * @author Sam Brannen
+ * @author Brian Clozel
 */
 class YamlProcessorTests {

-	private final YamlProcessor processor = new YamlProcessor() {};
+	private final YamlProcessor processor = new YamlProcessor() {
+	};


 	@Test
@@ -79,8 +82,8 @@ class YamlProcessorTests {
 	void badResource() {
 		setYaml("foo: bar\ncd\nspam:\n  foo: baz");
 		assertThatExceptionOfType(ScannerException.class)
-			.isThrownBy(() -> this.processor.process((properties, map) -> {}))
-			.withMessageContaining("line 3, column 1");
+				.isThrownBy(() -> this.processor.process((properties, map) -> {}))
+				.withMessageContaining("line 3, column 1");
 	}

 	@Test
@@ -127,8 +130,8 @@ class YamlProcessorTests {
 			Map<String, Object> bar = (Map<String, Object>) map.get("bar");
 			assertThat(bar.get("spam")).isEqualTo("bucket");

-			List<Object> keysFromProperties = properties.keySet().stream().collect(toList());
-			List<String> keysFromFlattenedMap = flattenedMap.keySet().stream().collect(toList());
+			List<Object> keysFromProperties = new ArrayList<>(properties.keySet());
+			List<String> keysFromFlattenedMap = new ArrayList<>(flattenedMap.keySet());
 			assertThat(keysFromProperties).containsExactlyInAnyOrderElementsOf(keysFromFlattenedMap);
 			// Keys in the Properties object are sorted.
 			assertThat(keysFromProperties).containsExactly("bar.spam", "cat", "foo");
@@ -138,14 +141,24 @@ class YamlProcessorTests {
 	}

 	@Test
-	void customTypeSupportedByDefault() throws Exception {
+	@SuppressWarnings("unchecked")
+	void standardTypesSupportedByDefault() throws Exception {
+		setYaml("value: !!set\n  ? first\n  ? second");
+		this.processor.process((properties, map) -> {
+			assertThat(properties).containsExactly(entry("value[0]", "first"), entry("value[1]", "second"));
+			assertThat(map.get("value")).isInstanceOf(Set.class);
+			Set<String> set = (Set<String>) map.get("value");
+			assertThat(set).containsExactly("first", "second");
+		});
+	}
+
+	@Test
+	void customTypeNotSupportedByDefault() throws Exception {
 		URL url = new URL("https://localhost:9000/");
 		setYaml("value: !!java.net.URL [\"" + url + "\"]");
-
-		this.processor.process((properties, map) -> {
-			assertThat(properties).containsExactly(entry("value", url));
-			assertThat(map).containsExactly(entry("value", url));
-		});
+		assertThatExceptionOfType(ConstructorException.class)
+				.isThrownBy(() -> this.processor.process((properties, map) -> {}))
+				.withMessageContaining("Unsupported type encountered in YAML document: java.net.URL");
 	}

 	@Test
@@ -168,8 +181,8 @@ class YamlProcessorTests {
 		setYaml("value: !!java.net.URL [\"https://localhost:9000/\"]");

 		assertThatExceptionOfType(ConstructorException.class)
-			.isThrownBy(() -> this.processor.process((properties, map) -> {}))
-			.withMessageContaining("Unsupported type encountered in YAML document: java.net.URL");
+				.isThrownBy(() -> this.processor.process((properties, map) -> {}))
+				.withMessageContaining("Unsupported type encountered in YAML document: java.net.URL");
 	}

 	private void setYaml(String yaml) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -133,6 +133,16 @@ public class BeanDefinitionTests {
 		assertThat(bd.equals(otherBd)).isTrue();
 		assertThat(otherBd.equals(bd)).isTrue();
 		assertThat(bd.hashCode() == otherBd.hashCode()).isTrue();
+
+		bd.getPropertyValues();
+		assertThat(bd.equals(otherBd)).isTrue();
+		assertThat(otherBd.equals(bd)).isTrue();
+		assertThat(bd.hashCode() == otherBd.hashCode()).isTrue();
+
+		bd.getConstructorArgumentValues();
+		assertThat(bd.equals(otherBd)).isTrue();
+		assertThat(otherBd.equals(bd)).isTrue();
+		assertThat(bd.hashCode() == otherBd.hashCode()).isTrue();
 	}

 	@Test
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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 +36,7 @@ public class LookupMethodTests {


 	@BeforeEach
-	public void setUp() {
+	public void setup() {
 		beanFactory = new DefaultListableBeanFactory();
 		XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(beanFactory);
 		reader.loadBeanDefinitions(new ClassPathResource("lookupMethodTests.xml", getClass()));
@@ -83,8 +83,8 @@ public class LookupMethodTests {
 	public void testWithThreeArgsShouldFail() {
 		AbstractBean bean = (AbstractBean) beanFactory.getBean("abstractBean");
 		assertThat(bean).isNotNull();
-		assertThatExceptionOfType(AbstractMethodError.class).as("does not have a three arg constructor").isThrownBy(() ->
-			bean.getThreeArguments("name", 1, 2));
+		assertThatExceptionOfType(AbstractMethodError.class).as("does not have a three arg constructor")
+				.isThrownBy(() -> bean.getThreeArguments("name", 1, 2));
 	}

 	@Test
@@ -97,6 +97,21 @@ public class LookupMethodTests {
 		assertThat(expected.isJedi()).isTrue();
 	}

+	@Test
+	public void testWithGenericBean() {
+		RootBeanDefinition bd = new RootBeanDefinition(NumberBean.class);
+		bd.getMethodOverrides().addOverride(new LookupOverride("getDoubleStore", null));
+		bd.getMethodOverrides().addOverride(new LookupOverride("getFloatStore", null));
+		beanFactory.registerBeanDefinition("numberBean", bd);
+		beanFactory.registerBeanDefinition("doubleStore", new RootBeanDefinition(DoubleStore.class));
+		beanFactory.registerBeanDefinition("floatStore", new RootBeanDefinition(FloatStore.class));
+
+		NumberBean bean = (NumberBean) beanFactory.getBean("numberBean");
+		assertThat(bean).isNotNull();
+		assertThat(beanFactory.getBean(DoubleStore.class)).isSameAs(bean.getDoubleStore());
+		assertThat(beanFactory.getBean(FloatStore.class)).isSameAs(bean.getFloatStore());
+	}
+

 	public static abstract class AbstractBean {

@@ -111,4 +126,24 @@ public class LookupMethodTests {
 		public abstract TestBean getThreeArguments(String name, int age, int anotherArg);
 	}

+
+	public static class NumberStore<T extends Number> {
+	}
+
+
+	public static class DoubleStore extends NumberStore<Double> {
+	}
+
+
+	public static class FloatStore extends NumberStore<Float> {
+	}
+
+
+	public static abstract class NumberBean {
+
+		public abstract NumberStore<Double> getDoubleStore();
+
+		public abstract NumberStore<Float> getFloatStore();
+	}
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -34,57 +34,78 @@ import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException
 public class PathEditorTests {

 	@Test
-	public void testClasspathPathName() throws Exception {
+	public void testClasspathPathName() {
 		PropertyEditor pathEditor = new PathEditor();
 		pathEditor.setAsText("classpath:" + ClassUtils.classPackageAsResourcePath(getClass()) + "/" +
 				ClassUtils.getShortName(getClass()) + ".class");
 		Object value = pathEditor.getValue();
-		boolean condition = value instanceof Path;
-		assertThat(condition).isTrue();
+		assertThat(value instanceof Path).isTrue();
 		Path path = (Path) value;
 		assertThat(path.toFile().exists()).isTrue();
 	}

 	@Test
-	public void testWithNonExistentResource() throws Exception {
+	public void testWithNonExistentResource() {
 		PropertyEditor propertyEditor = new PathEditor();
 		assertThatIllegalArgumentException().isThrownBy(() ->
 				propertyEditor.setAsText("classpath:/no_way_this_file_is_found.doc"));
 	}

 	@Test
-	public void testWithNonExistentPath() throws Exception {
+	public void testWithNonExistentPath() {
 		PropertyEditor pathEditor = new PathEditor();
 		pathEditor.setAsText("file:/no_way_this_file_is_found.doc");
 		Object value = pathEditor.getValue();
-		boolean condition1 = value instanceof Path;
-		assertThat(condition1).isTrue();
+		assertThat(value instanceof Path).isTrue();
 		Path path = (Path) value;
-		boolean condition = !path.toFile().exists();
-		assertThat(condition).isTrue();
+		assertThat(!path.toFile().exists()).isTrue();
 	}

 	@Test
-	public void testAbsolutePath() throws Exception {
+	public void testAbsolutePath() {
 		PropertyEditor pathEditor = new PathEditor();
 		pathEditor.setAsText("/no_way_this_file_is_found.doc");
 		Object value = pathEditor.getValue();
-		boolean condition1 = value instanceof Path;
-		assertThat(condition1).isTrue();
+		assertThat(value instanceof Path).isTrue();
 		Path path = (Path) value;
-		boolean condition = !path.toFile().exists();
-		assertThat(condition).isTrue();
+		assertThat(!path.toFile().exists()).isTrue();
 	}

 	@Test
-	public void testUnqualifiedPathNameFound() throws Exception {
+	public void testWindowsAbsolutePath() {
+		PropertyEditor pathEditor = new PathEditor();
+		pathEditor.setAsText("C:\\no_way_this_file_is_found.doc");
+		Object value = pathEditor.getValue();
+		assertThat(value instanceof Path).isTrue();
+		Path path = (Path) value;
+		assertThat(!path.toFile().exists()).isTrue();
+	}
+
+	@Test
+	public void testWindowsAbsoluteFilePath() {
+		PropertyEditor pathEditor = new PathEditor();
+		try {
+			pathEditor.setAsText("file://C:\\no_way_this_file_is_found.doc");
+			Object value = pathEditor.getValue();
+			assertThat(value instanceof Path).isTrue();
+			Path path = (Path) value;
+			assertThat(!path.toFile().exists()).isTrue();
+		}
+		catch (IllegalArgumentException ex) {
+			if (File.separatorChar == '\\') {  // on Windows, otherwise silently ignore
+				throw ex;
+			}
+		}
+	}
+
+	@Test
+	public void testUnqualifiedPathNameFound() {
 		PropertyEditor pathEditor = new PathEditor();
 		String fileName = ClassUtils.classPackageAsResourcePath(getClass()) + "/" +
 				ClassUtils.getShortName(getClass()) + ".class";
 		pathEditor.setAsText(fileName);
 		Object value = pathEditor.getValue();
-		boolean condition = value instanceof Path;
-		assertThat(condition).isTrue();
+		assertThat(value instanceof Path).isTrue();
 		Path path = (Path) value;
 		File file = path.toFile();
 		assertThat(file.exists()).isTrue();
@@ -96,14 +117,13 @@ public class PathEditorTests {
 	}

 	@Test
-	public void testUnqualifiedPathNameNotFound() throws Exception {
+	public void testUnqualifiedPathNameNotFound() {
 		PropertyEditor pathEditor = new PathEditor();
 		String fileName = ClassUtils.classPackageAsResourcePath(getClass()) + "/" +
 				ClassUtils.getShortName(getClass()) + ".clazz";
 		pathEditor.setAsText(fileName);
 		Object value = pathEditor.getValue();
-		boolean condition = value instanceof Path;
-		assertThat(condition).isTrue();
+		assertThat(value instanceof Path).isTrue();
 		Path path = (Path) value;
 		File file = path.toFile();
 		assertThat(file.exists()).isFalse();
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -19,7 +19,6 @@ package org.springframework.context.index.processor;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.EnumSet;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
@@ -37,7 +36,7 @@ import javax.lang.model.element.Modifier;
 import javax.lang.model.element.TypeElement;

 /**
- * Annotation {@link Processor} that writes {@link CandidateComponentsMetadata}
+ * Annotation {@link Processor} that writes a {@link CandidateComponentsMetadata}
 * file for spring components.
 *
 * @author Stephane Nicoll
@@ -46,9 +45,6 @@ import javax.lang.model.element.TypeElement;
 */
 public class CandidateComponentsIndexer implements Processor {

-	private static final Set<ElementKind> TYPE_KINDS =
-			Collections.unmodifiableSet(EnumSet.of(ElementKind.CLASS, ElementKind.INTERFACE));
-
 	private MetadataStore metadataStore;

 	private MetadataCollector metadataCollector;
@@ -136,7 +132,8 @@ public class CandidateComponentsIndexer implements Processor {
 	private static List<TypeElement> staticTypesIn(Iterable<? extends Element> elements) {
 		List<TypeElement> list = new ArrayList<>();
 		for (Element element : elements) {
-			if (TYPE_KINDS.contains(element.getKind()) && element.getModifiers().contains(Modifier.STATIC)) {
+			if ((element.getKind().isClass() || element.getKind() == ElementKind.INTERFACE) &&
+					element.getModifiers().contains(Modifier.STATIC) && element instanceof TypeElement) {
 				list.add((TypeElement) element);
 			}
 		}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -26,7 +26,7 @@ import javax.lang.model.element.ElementKind;

 /**
 * A {@link StereotypesProvider} implementation that extracts the stereotypes
- * flagged by the {@value INDEXED_ANNOTATION} annotation. This implementation
+ * flagged by the {@value #INDEXED_ANNOTATION} annotation. This implementation
 * honors stereotypes defined this way on meta-annotations.
 *
 * @author Stephane Nicoll
@@ -48,7 +48,7 @@ class IndexedStereotypesProvider implements StereotypesProvider {
 	public Set<String> getStereotypes(Element element) {
 		Set<String> stereotypes = new LinkedHashSet<>();
 		ElementKind kind = element.getKind();
-		if (kind != ElementKind.CLASS && kind != ElementKind.INTERFACE) {
+		if (!kind.isClass() && kind != ElementKind.INTERFACE) {
 			return stereotypes;
 		}
 		Set<Element> seen = new HashSet<>();
@@ -24,7 +24,7 @@ import javax.lang.model.element.ElementKind;

 /**
 * A {@link StereotypesProvider} implementation that provides the
- * {@value STEREOTYPE} stereotype for each package-info.
+ * {@value #STEREOTYPE} stereotype for each package-info.
 *
 * @author Stephane Nicoll
 * @since 5.0
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -24,8 +24,8 @@ import javax.lang.model.element.Element;
 import javax.lang.model.element.ElementKind;

 /**
- * A {@link StereotypesProvider} that extract a stereotype for each
- * {@code javax.*} annotation placed on a class or interface.
+ * A {@link StereotypesProvider} that extracts a stereotype for each
+ * {@code javax.*} annotation <i>present</i> on a class or interface.
 *
 * @author Stephane Nicoll
 * @since 5.0
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -22,7 +22,7 @@ import javax.lang.model.element.Element;

 /**
 * Provide the list of stereotypes that match an {@link Element}.
- * If an element has one more stereotypes, it is referenced in the index
+ * <p>If an element has one or more stereotypes, it is referenced in the index
 * of candidate components and each stereotype can be queried individually.
 *
 * @author Stephane Nicoll
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -130,8 +130,8 @@ public class EhCacheManagerFactoryBean implements FactoryBean<CacheManager>, Ini

 	@Override
 	public void afterPropertiesSet() throws CacheException {
-		if (logger.isInfoEnabled()) {
-			logger.info("Initializing EhCache CacheManager" +
+		if (logger.isDebugEnabled()) {
+			logger.debug("Initializing EhCache CacheManager" +
 					(this.cacheManagerName != null ? " '" + this.cacheManagerName + "'" : ""));
 		}

@@ -188,8 +188,8 @@ public class EhCacheManagerFactoryBean implements FactoryBean<CacheManager>, Ini
 	@Override
 	public void destroy() {
 		if (this.cacheManager != null && this.locallyManaged) {
-			if (logger.isInfoEnabled()) {
-				logger.info("Shutting down EhCache CacheManager" +
+			if (logger.isDebugEnabled()) {
+				logger.debug("Shutting down EhCache CacheManager" +
 						(this.cacheManagerName != null ? " '" + this.cacheManagerName + "'" : ""));
 			}
 			this.cacheManager.shutdown();
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -31,7 +31,8 @@ import org.springframework.core.annotation.AliasFor;
 *
 * <p>In contrast to the {@link Cacheable @Cacheable} annotation, this annotation
 * does not cause the advised method to be skipped. Rather, it always causes the
- * method to be invoked and its result to be stored in the associated cache. Note
+ * method to be invoked and its result to be stored in the associated cache if the
+ * {@link #condition()} and {@link #unless()} expressions match accordingly. Note
 * that Java8's {@code Optional} return types are automatically handled and its
 * content is stored in the cache if present.
 *
@@ -118,10 +119,15 @@ public @interface CachePut {
 	/**
 	 * Spring Expression Language (SpEL) expression used for making the cache
 	 * put operation conditional.
+	 * <p>This expression is evaluated after the method has been called due to the
+	 * nature of the put operation and can therefore refer to the {@code result}.
 	 * <p>Default is {@code ""}, meaning the method result is always cached.
 	 * <p>The SpEL expression evaluates against a dedicated context that provides the
 	 * following meta-data:
 	 * <ul>
+	 * <li>{@code #result} for a reference to the result of the method invocation. For
+	 * supported wrappers such as {@code Optional}, {@code #result} refers to the actual
+	 * object, not the wrapper</li>
 	 * <li>{@code #root.method}, {@code #root.target}, and {@code #root.caches} for
 	 * references to the {@link java.lang.reflect.Method method}, target object, and
 	 * affected cache(s) respectively.</li>
@@ -136,8 +142,6 @@ public @interface CachePut {

 	/**
 	 * Spring Expression Language (SpEL) expression used to veto the cache put operation.
-	 * <p>Unlike {@link #condition}, this expression is evaluated after the method
-	 * has been called and can therefore refer to the {@code result}.
 	 * <p>Default is {@code ""}, meaning that caching is never vetoed.
 	 * <p>The SpEL expression evaluates against a dedicated context that provides the
 	 * following meta-data:
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -221,11 +221,11 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 			}
 			catch (NoUniqueBeanDefinitionException ex) {
 				throw new IllegalStateException("No CacheResolver specified, and no unique bean of type " +
-						"CacheManager found. Mark one as primary or declare a specific CacheManager to use.");
+						"CacheManager found. Mark one as primary or declare a specific CacheManager to use.", ex);
 			}
 			catch (NoSuchBeanDefinitionException ex) {
 				throw new IllegalStateException("No CacheResolver specified, and no bean of type CacheManager found. " +
-						"Register a CacheManager bean or remove the @EnableCaching annotation from your configuration.");
+						"Register a CacheManager bean or remove the @EnableCaching annotation from your configuration.", ex);
 			}
 		}
 		this.initialized = true;
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -16,6 +16,7 @@

 package org.springframework.context;

+import java.time.Clock;
 import java.util.EventObject;

 /**
@@ -37,18 +38,37 @@ public abstract class ApplicationEvent extends EventObject {


 	/**
-	 * Create a new {@code ApplicationEvent}.
+	 * Create a new {@code ApplicationEvent} with its {@link #getTimestamp() timestamp}
+	 * set to {@link System#currentTimeMillis()}.
 	 * @param source the object on which the event initially occurred or with
 	 * which the event is associated (never {@code null})
+	 * @see #ApplicationEvent(Object, Clock)
 	 */
 	public ApplicationEvent(Object source) {
 		super(source);
 		this.timestamp = System.currentTimeMillis();
 	}

+	/**
+	 * Create a new {@code ApplicationEvent} with its {@link #getTimestamp() timestamp}
+	 * set to the value returned by {@link Clock#millis()} in the provided {@link Clock}.
+	 * <p>This constructor is typically used in testing scenarios.
+	 * @param source the object on which the event initially occurred or with
+	 * which the event is associated (never {@code null})
+	 * @param clock a clock which will provide the timestamp
+	 * @since 5.3.8
+	 * @see #ApplicationEvent(Object)
+	 */
+	public ApplicationEvent(Object source, Clock clock) {
+		super(source);
+		this.timestamp = clock.millis();
+	}
+

 	/**
-	 * Return the system time in milliseconds when the event occurred.
+	 * Return the time in milliseconds when the event occurred.
+	 * @see #ApplicationEvent(Object)
+	 * @see #ApplicationEvent(Object, Clock)
 	 */
 	public final long getTimestamp() {
 		return this.timestamp;
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -35,6 +35,8 @@ import java.util.function.Consumer;
 * @param <E> the specific {@code ApplicationEvent} subclass to listen to
 * @see org.springframework.context.ApplicationEvent
 * @see org.springframework.context.event.ApplicationEventMulticaster
+ * @see org.springframework.context.event.SmartApplicationListener
+ * @see org.springframework.context.event.GenericApplicationListener
 * @see org.springframework.context.event.EventListener
 */
@FunctionalInterface
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -16,6 +16,8 @@

 package org.springframework.context;

+import java.util.function.Consumer;
+
 import org.springframework.core.ResolvableType;
 import org.springframework.core.ResolvableTypeProvider;
 import org.springframework.util.Assert;
@@ -23,11 +25,12 @@ import org.springframework.util.Assert;
 /**
 * An {@link ApplicationEvent} that carries an arbitrary payload.
 *
- * <p>Mainly intended for internal use within the framework.
- *
 * @author Stephane Nicoll
+ * @author Juergen Hoeller
 * @since 4.2
 * @param <T> the payload type of the event
+ * @see ApplicationEventPublisher#publishEvent(Object)
+ * @see ApplicationListener#forPayload(Consumer)
 */
@SuppressWarnings("serial")
 public class PayloadApplicationEvent<T> extends ApplicationEvent implements ResolvableTypeProvider {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -26,10 +26,10 @@ import org.springframework.core.io.ResourceLoader;
 * the {@link org.springframework.context.ApplicationContextAware} interface.
 *
 * <p>Note that {@link org.springframework.core.io.Resource} dependencies can also
- * be exposed as bean properties of type {@code Resource}, populated via Strings
- * with automatic type conversion by the bean factory. This removes the need for
- * implementing any callback interface just for the purpose of accessing a
- * specific file resource.
+ * be exposed as bean properties of type {@code Resource} or {@code Resource[]},
+ * populated via Strings with automatic type conversion by the bean factory. This
+ * removes the need for implementing any callback interface just for the purpose
+ * of accessing specific file resources.
 *
 * <p>You typically need a {@link ResourceLoader} when your application object has to
 * access a variety of file resources whose names are calculated. A good strategy is
@@ -48,7 +48,7 @@ import org.springframework.core.io.ResourceLoader;
 * default; see also the {@code ResourcePatternUtils.getResourcePatternResolver} method.
 *
 * <p>As an alternative to a {@code ResourcePatternResolver} dependency, consider
- * exposing bean properties of type {@code Resource} array, populated via pattern
+ * exposing bean properties of type {@code Resource[]} array, populated via pattern
 * Strings with automatic type conversion by the bean factory at binding time.
 *
 * @author Juergen Hoeller
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -52,6 +52,7 @@ import org.springframework.context.ApplicationStartupAware;
 import org.springframework.context.EnvironmentAware;
 import org.springframework.context.ResourceLoaderAware;
 import org.springframework.context.annotation.ConfigurationClassEnhancer.EnhancedConfiguration;
+import org.springframework.core.NativeDetector;
 import org.springframework.core.Ordered;
 import org.springframework.core.PriorityOrdered;
 import org.springframework.core.env.Environment;
@@ -74,16 +75,17 @@ import org.springframework.util.ClassUtils;
 *
 * <p>Registered by default when using {@code <context:annotation-config/>} or
 * {@code <context:component-scan/>}. Otherwise, may be declared manually as
- * with any other BeanFactoryPostProcessor.
+ * with any other {@link BeanFactoryPostProcessor}.
 *
 * <p>This post processor is priority-ordered as it is important that any
- * {@link Bean} methods declared in {@code @Configuration} classes have
+ * {@link Bean @Bean} methods declared in {@code @Configuration} classes have
 * their corresponding bean definitions registered before any other
- * {@link BeanFactoryPostProcessor} executes.
+ * {@code BeanFactoryPostProcessor} executes.
 *
 * @author Chris Beams
 * @author Juergen Hoeller
 * @author Phillip Webb
+ * @author Sam Brannen
 * @since 3.0
 */
 public class ConfigurationClassPostProcessor implements BeanDefinitionRegistryPostProcessor,
@@ -104,13 +106,6 @@ public class ConfigurationClassPostProcessor implements BeanDefinitionRegistryPo
 	private static final String IMPORT_REGISTRY_BEAN_NAME =
 			ConfigurationClassPostProcessor.class.getName() + ".importRegistry";

-	/**
-	 * Whether this environment lives within a native image.
-	 * Exposed as a private static field rather than in a {@code NativeImageDetector.inNativeImage()} static method due to https://github.com/oracle/graal/issues/2594.
-	 * @see <a href="https://github.com/oracle/graal/blob/master/sdk/src/org.graalvm.nativeimage/src/org/graalvm/nativeimage/ImageInfo.java">ImageInfo.java</a>
-	 */
-	private static final boolean IN_NATIVE_IMAGE = (System.getProperty("org.graalvm.nativeimage.imagecode") != null);
-

 	private final Log logger = LogFactory.getLog(getClass());

@@ -395,21 +390,30 @@ public class ConfigurationClassPostProcessor implements BeanDefinitionRegistryPo
 		for (String beanName : beanFactory.getBeanDefinitionNames()) {
 			BeanDefinition beanDef = beanFactory.getBeanDefinition(beanName);
 			Object configClassAttr = beanDef.getAttribute(ConfigurationClassUtils.CONFIGURATION_CLASS_ATTRIBUTE);
+			AnnotationMetadata annotationMetadata = null;
 			MethodMetadata methodMetadata = null;
 			if (beanDef instanceof AnnotatedBeanDefinition) {
-				methodMetadata = ((AnnotatedBeanDefinition) beanDef).getFactoryMethodMetadata();
+				AnnotatedBeanDefinition annotatedBeanDefinition = (AnnotatedBeanDefinition) beanDef;
+				annotationMetadata = annotatedBeanDefinition.getMetadata();
+				methodMetadata = annotatedBeanDefinition.getFactoryMethodMetadata();
 			}
 			if ((configClassAttr != null || methodMetadata != null) && beanDef instanceof AbstractBeanDefinition) {
 				// Configuration class (full or lite) or a configuration-derived @Bean method
-				// -> resolve bean class at this point...
+				// -> eagerly resolve bean class at this point, unless it's a 'lite' configuration
+				// or component class without @Bean methods.
 				AbstractBeanDefinition abd = (AbstractBeanDefinition) beanDef;
 				if (!abd.hasBeanClass()) {
-					try {
-						abd.resolveBeanClass(this.beanClassLoader);
-					}
-					catch (Throwable ex) {
-						throw new IllegalStateException(
-								"Cannot load configuration class: " + beanDef.getBeanClassName(), ex);
+					boolean liteConfigurationCandidateWithoutBeanMethods =
+							(ConfigurationClassUtils.CONFIGURATION_CLASS_LITE.equals(configClassAttr) &&
+								annotationMetadata != null && !ConfigurationClassUtils.hasBeanMethods(annotationMetadata));
+					if (!liteConfigurationCandidateWithoutBeanMethods) {
+						try {
+							abd.resolveBeanClass(this.beanClassLoader);
+						}
+						catch (Throwable ex) {
+							throw new IllegalStateException(
+									"Cannot load configuration class: " + beanDef.getBeanClassName(), ex);
+						}
 					}
 				}
 			}
@@ -427,15 +431,11 @@ public class ConfigurationClassPostProcessor implements BeanDefinitionRegistryPo
 				configBeanDefs.put(beanName, (AbstractBeanDefinition) beanDef);
 			}
 		}
-		if (configBeanDefs.isEmpty()) {
+		if (configBeanDefs.isEmpty() || NativeDetector.inNativeImage()) {
 			// nothing to enhance -> return immediately
 			enhanceConfigClasses.end();
 			return;
 		}
-		if (IN_NATIVE_IMAGE) {
-			throw new BeanDefinitionStoreException("@Configuration classes need to be marked as " +
-					"proxyBeanMethods=false. Found: " + configBeanDefs.keySet());
-		}

 		ConfigurationClassEnhancer enhancer = new ConfigurationClassEnhancer();
 		for (Map.Entry<String, AbstractBeanDefinition> entry : configBeanDefs.entrySet()) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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 @@ import org.springframework.stereotype.Component;
 *
 * @author Chris Beams
 * @author Juergen Hoeller
+ * @author Sam Brannen
 * @since 3.1
 */
 abstract class ConfigurationClassUtils {
@@ -162,6 +163,10 @@ abstract class ConfigurationClassUtils {
 		}

 		// Finally, let's look for @Bean methods...
+		return hasBeanMethods(metadata);
+	}
+
+	static boolean hasBeanMethods(AnnotationMetadata metadata) {
 		try {
 			return metadata.hasAnnotatedMethods(Bean.class.getName());
 		}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -23,6 +23,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Predicate;

 import org.springframework.aop.framework.AopProxyUtils;
 import org.springframework.beans.factory.BeanClassLoaderAware;
@@ -137,6 +138,22 @@ public abstract class AbstractApplicationEventMulticaster
 		}
 	}

+	@Override
+	public void removeApplicationListeners(Predicate<ApplicationListener<?>> predicate) {
+		synchronized (this.defaultRetriever) {
+			this.defaultRetriever.applicationListeners.removeIf(predicate);
+			this.retrieverCache.clear();
+		}
+	}
+
+	@Override
+	public void removeApplicationListenerBeans(Predicate<String> predicate) {
+		synchronized (this.defaultRetriever) {
+			this.defaultRetriever.applicationListenerBeans.removeIf(predicate);
+			this.retrieverCache.clear();
+		}
+	}
+
 	@Override
 	public void removeAllListeners() {
 		synchronized (this.defaultRetriever) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -16,6 +16,8 @@

 package org.springframework.context.event;

+import java.util.function.Predicate;
+
 import org.springframework.context.ApplicationEvent;
 import org.springframework.context.ApplicationListener;
 import org.springframework.core.ResolvableType;
@@ -39,31 +41,68 @@ public interface ApplicationEventMulticaster {
 	/**
 	 * Add a listener to be notified of all events.
 	 * @param listener the listener to add
+	 * @see #removeApplicationListener(ApplicationListener)
+	 * @see #removeApplicationListeners(Predicate)
 	 */
 	void addApplicationListener(ApplicationListener<?> listener);

 	/**
 	 * Add a listener bean to be notified of all events.
 	 * @param listenerBeanName the name of the listener bean to add
+	 * @see #removeApplicationListenerBean(String)
+	 * @see #removeApplicationListenerBeans(Predicate)
 	 */
 	void addApplicationListenerBean(String listenerBeanName);

 	/**
 	 * Remove a listener from the notification list.
 	 * @param listener the listener to remove
+	 * @see #addApplicationListener(ApplicationListener)
+	 * @see #removeApplicationListeners(Predicate)
 	 */
 	void removeApplicationListener(ApplicationListener<?> listener);

 	/**
 	 * Remove a listener bean from the notification list.
 	 * @param listenerBeanName the name of the listener bean to remove
+	 * @see #addApplicationListenerBean(String)
+	 * @see #removeApplicationListenerBeans(Predicate)
 	 */
 	void removeApplicationListenerBean(String listenerBeanName);

+	/**
+	 * Remove all matching listeners from the set of registered
+	 * {@code ApplicationListener} instances (which includes adapter classes
+	 * such as {@link ApplicationListenerMethodAdapter}, e.g. for annotated
+	 * {@link EventListener} methods).
+	 * <p>Note: This just applies to instance registrations, not to listeners
+	 * registered by bean name.
+	 * @param predicate the predicate to identify listener instances to remove,
+	 * e.g. checking {@link SmartApplicationListener#getListenerId()}
+	 * @since 5.3.5
+	 * @see #addApplicationListener(ApplicationListener)
+	 * @see #removeApplicationListener(ApplicationListener)
+	 */
+	void removeApplicationListeners(Predicate<ApplicationListener<?>> predicate);
+
+	/**
+	 * Remove all matching listener beans from the set of registered
+	 * listener bean names (referring to bean classes which in turn
+	 * implement the {@link ApplicationListener} interface directly).
+	 * <p>Note: This just applies to bean name registrations, not to
+	 * programmatically registered {@code ApplicationListener} instances.
+	 * @param predicate the predicate to identify listener bean names to remove
+	 * @since 5.3.5
+	 * @see #addApplicationListenerBean(String)
+	 * @see #removeApplicationListenerBean(String)
+	 */
+	void removeApplicationListenerBeans(Predicate<String> predicate);
+
 	/**
 	 * Remove all listeners registered with this multicaster.
 	 * <p>After a remove call, the multicaster will perform no action
 	 * on event notification until new listeners are registered.
+	 * @see #removeApplicationListeners(Predicate)
 	 */
 	void removeAllListeners();

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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 +24,7 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
+import java.util.StringJoiner;
 import java.util.concurrent.CompletionStage;

 import org.apache.commons.logging.Log;
@@ -89,6 +90,9 @@ public class ApplicationListenerMethodAdapter implements GenericApplicationListe

 	private final int order;

+	@Nullable
+	private volatile String listenerId;
+
 	@Nullable
 	private ApplicationContext applicationContext;

@@ -113,6 +117,8 @@ public class ApplicationListenerMethodAdapter implements GenericApplicationListe
 		this.declaredEventTypes = resolveDeclaredEventTypes(method, ann);
 		this.condition = (ann != null ? ann.condition() : null);
 		this.order = resolveOrder(this.targetMethod);
+		String id = (ann != null ? ann.id() : "");
+		this.listenerId = (!id.isEmpty() ? id : null);
 	}

 	private static List<ResolvableType> resolveDeclaredEventTypes(Method method, @Nullable EventListener ann) {
@@ -186,6 +192,32 @@ public class ApplicationListenerMethodAdapter implements GenericApplicationListe
 		return this.order;
 	}

+	@Override
+	public String getListenerId() {
+		String id = this.listenerId;
+		if (id == null) {
+			id = getDefaultListenerId();
+			this.listenerId = id;
+		}
+		return id;
+	}
+
+	/**
+	 * Determine the default id for the target listener, to be applied in case of
+	 * no {@link EventListener#id() annotation-specified id value}.
+	 * <p>The default implementation builds a method name with parameter types.
+	 * @since 5.3.5
+	 * @see #getListenerId()
+	 */
+	protected String getDefaultListenerId() {
+		Method method = getTargetMethod();
+		StringJoiner sj = new StringJoiner(",", "(", ")");
+		for (Class<?> paramType : method.getParameterTypes()) {
+			sj.add(paramType.getName());
+		}
+		return ClassUtils.getQualifiedMethodName(method) + sj.toString();
+	}
+

 	/**
 	 * Process the specified {@link ApplicationEvent}, checking if the condition
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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 +21,7 @@ import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
+import java.util.function.Predicate;

 import org.springframework.context.ApplicationEvent;
 import org.springframework.core.annotation.AliasFor;
@@ -83,6 +84,7 @@ import org.springframework.core.annotation.AliasFor;
 * @author Sam Brannen
 * @since 4.2
 * @see EventListenerMethodProcessor
+ * @see org.springframework.transaction.event.TransactionalEventListener
 */
@Target({ElementType.METHOD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@@ -128,4 +130,13 @@ public @interface EventListener {
 	 */
 	String condition() default "";

+	/**
+	 * An optional identifier for the listener, defaulting to the fully-qualified
+	 * signature of the declaring method (e.g. "mypackage.MyClass.myMethod()").
+	 * @since 5.3.5
+	 * @see SmartApplicationListener#getListenerId()
+	 * @see ApplicationEventMulticaster#removeApplicationListeners(Predicate)
+	 */
+	String id() default "";
+
 }
--- a/Show More
+++ b/Show More