Release v5.3.7

This commit makes sure that the DefaultPartHttpMessageReader uses a
random temporary directory to store uploaded files, so that two
instances do not collide.

See gh-26931

.github/ISSUE_TEMPLATE.md

@@ -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 issue will be closed as superseded.
--->
+-->

.gitignore

@@ -41,3 +41,6 @@ out
 test-output
 atlassian-ide-plugin.xml
 .gradletasknamecache
+
+# VS Code
+.vscode/

CONTRIBUTING.md

@@ -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/).

README.md

@@ -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).

build.gradle

@@ -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 '1.4.21' apply false
+	id 'org.jetbrains.kotlin.jvm' version '1.5.0' 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 "1.4.21" 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 "1.5.0" 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:2.12.0"
-			mavenBom "io.netty:netty-bom:4.1.54.Final"
-			mavenBom "io.projectreactor:reactor-bom:2020.0.2"
-			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR8"
+			mavenBom "com.fasterxml.jackson:jackson-bom:2.12.3"
+			mavenBom "io.netty:netty-bom:4.1.63.Final"
+			mavenBom "io.projectreactor:reactor-bom:2020.0.7"
+			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR9"
 			mavenBom "io.rsocket:rsocket-bom:1.1.0"
-			mavenBom "org.eclipse.jetty:jetty-bom:9.4.35.v20201120"
-			mavenBom "org.jetbrains.kotlin:kotlin-bom:1.4.21"
-			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.4.2"
-			mavenBom "org.junit:junit-bom:5.7.0"
+			mavenBom "org.eclipse.jetty:jetty-bom:9.4.40.v20210413"
+			mavenBom "org.jetbrains.kotlin:kotlin-bom:1.5.0"
+			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.4.3"
+			mavenBom "org.jetbrains.kotlinx:kotlinx-serialization-bom:1.2.0"
+			mavenBom "org.junit:junit-bom:5.7.1"
 		}
 		dependencies {
-			dependencySet(group: 'org.apache.logging.log4j', version: '2.14.0') {
+			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: '3.0.7') {
+			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:3.0.8"
+			dependency "io.reactivex.rxjava2:rxjava:2.2.21"
+			dependency "io.reactivex.rxjava3:rxjava:3.0.12"
 			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.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:3.14.0"
+			dependency "com.google.protobuf:protobuf-java-util:3.15.8"
 			dependency "com.googlecode.protobuf-java-format:protobuf-java-format:1.4"
-			dependency("com.thoughtworks.xstream:xstream:1.4.14") {
+			dependency("com.thoughtworks.xstream:xstream:1.4.16") {
 				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:1.3.23"
+			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: '5.16.1') {
 				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.freemarker:freemarker:2.3.31"
 			dependency "org.hsqldb:hsqldb:2.5.1"
 			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:5.4.25.Final"
-			dependency "org.hibernate:hibernate-validator:6.1.6.Final"
+			dependency "org.hibernate:hibernate-core:5.4.31.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: '9.0.40') {
+			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: '9.0.40') {
+			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.45') {
 				entry 'tomcat-embed-core'
 				entry 'tomcat-embed-websocket'
 			}
-			dependencySet(group: 'io.undertow', version: '2.2.3.Final') {
+			dependencySet(group: 'io.undertow', version: '2.2.7.Final') {
 				entry 'undertow-core'
 				entry('undertow-websockets-jsr') {
 					exclude group: "org.jboss.spec.javax.websocket", name: "jboss-websocket-api_1.1_spec"
@@ -162,9 +161,9 @@ configure(allprojects) { project ->
 			}
 			dependency 'org.apache.httpcomponents.client5:httpclient5:5.0.3'
 			dependency 'org.apache.httpcomponents.core5:httpcore5-reactive:5.0.3'
-			dependency "org.eclipse.jetty:jetty-reactive-httpclient:1.1.4"
+			dependency "org.eclipse.jetty:jetty-reactive-httpclient:1.1.6"
 
-			dependency "org.jruby:jruby:9.2.13.0"
+			dependency "org.jruby:jruby:9.2.16.0"
 			dependency "org.python:jython-standalone:2.7.1"
 			dependency "org.mozilla:rhino:1.7.11"
 
@@ -181,23 +180,23 @@ 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:3.18.1"
-			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: '3.6.28') {
+			dependencySet(group: 'org.mockito', version: '3.9.0') {
 				entry('mockito-core') {
 					exclude group: "org.hamcrest", name: "hamcrest-core"
 				}
@@ -205,10 +204,10 @@ configure(allprojects) { project ->
 			}
 			dependency "io.mockk:mockk:1.10.2"
 
-			dependency("net.sourceforge.htmlunit:htmlunit:2.45.0") {
+			dependency("net.sourceforge.htmlunit:htmlunit:2.49.1") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
-			dependency("org.seleniumhq.selenium:htmlunit-driver:2.45.0") {
+			dependency("org.seleniumhq.selenium:htmlunit-driver:2.49.1") {
 				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"]
 				allWarningsAsErrors = true
 			}
 		}
 		compileTestKotlin {
 			kotlinOptions {
-				jvmTarget = "1.8"
 				freeCompilerArgs = ["-Xjsr305=strict"]
 			}
 		}
@@ -339,7 +336,7 @@ configure([rootProject] + javaProjects) { project ->
 	}
 
 	checkstyle {
-		toolVersion = "8.38"
+		toolVersion = "8.42"
 		configDirectory.set(rootProject.file("src/checkstyle"))
 	}
 
@@ -380,8 +377,8 @@ configure([rootProject] + javaProjects) { project ->
 			"https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.10/",
 			"https://hc.apache.org/httpcomponents-client-ga/httpclient/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/5.7.1/api/"
 	] as String[]
 }
 

buildSrc/README.md

@@ -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

buildSrc/src/main/java/org/springframework/build/compile/CompilerConventionsPlugin.java

@@ -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 -> {

ci/README.adoc

@@ -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.

ci/config/release-scripts.yml

@@ -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'

ci/images/ci-image/Dockerfile

@@ -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

ci/images/get-jdk-url.sh

@@ -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"

ci/images/setup.sh

@@ -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

ci/images/spring-framework-ci-image/Dockerfile

@@ -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

ci/images/spring-framework-jdk11-ci-image/Dockerfile

@@ -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

ci/images/spring-framework-jdk14-ci-image/Dockerfile

@@ -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

ci/images/spring-framework-jdk15-ci-image/Dockerfile

@@ -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

ci/parameters.yml

@@ -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

ci/pipeline.yml

@@ -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
@@ -40,27 +45,28 @@ resource_types:
   type: registry-image
   source:
     repository: springio/artifactory-resource
-    tag: 0.0.12
+    tag: 0.0.13
 - name: github-status-resource
   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: 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" ]

ci/scripts/build-pr.sh

@@ -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

ci/scripts/check-project.sh

@@ -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

ci/scripts/generate-changelog.sh

@@ -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 \

ci/scripts/promote-version.sh

@@ -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 $BUILD_INFO_LOCATION || { exit 1; }
+java -jar /opt/concourse-release-scripts.jar \
+  --spring.config.location=${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 || { exit 1; }
+  promote $RELEASE_TYPE $BUILD_INFO_LOCATION || { exit 1; }
 
 echo "Promotion complete"
 echo $version > version/version

ci/tasks/build-pr.yml

@@ -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

ci/tasks/check-project.yml

@@ -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:

ci/tasks/generate-changelog.yml

@@ -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:

ci/tasks/promote-version.yml

@@ -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

ci/tasks/sync-to-maven-central.yml

@@ -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

gradle.properties

@@ -1,4 +1,4 @@
-version=5.3.2-SNAPSHOT
+version=5.3.7
 org.gradle.jvmargs=-Xmx1536M
 org.gradle.caching=true
 org.gradle.parallel=true

gradle/custom-java-home.gradle

@@ -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)
-		}
-	}
-
-}

gradle/ide.gradle

@@ -55,14 +55,6 @@ eclipse.classpath.file.whenMerged { classpath ->
 	}
 }
 
-// Ensure that test fixture dependencies are handled properly in Gradle 6.7.
-// Bug fixed in Gradle 6.8: https://github.com/gradle/gradle/issues/14932 
-eclipse.classpath.file.whenMerged {
-	entries.findAll { it instanceof ProjectDependency }.each {
-		it.entryAttributes.remove('without_test_code')
-	}
-}
-
 // 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
@@ -116,21 +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")
-}

gradle/spring-module.gradle

@@ -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

gradle/toolchains.gradle

@@ -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
+	}
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

settings.gradle

@@ -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)"

spring-aop/src/main/java/org/springframework/aop/DynamicIntroductionAdvice.java

@@ -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.

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

@@ -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.

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

@@ -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);
 				}
 			}

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

@@ -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) {

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

@@ -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));

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

@@ -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() {

spring-beans/spring-beans.gradle

@@ -23,8 +23,6 @@ sourceSets {
 }
 
 compileGroovy {
-	sourceCompatibility = 1.8
-	targetCompatibility = 1.8
 	options.compilerArgs += "-Werror"
 }
 

spring-beans/src/jmh/resources/org/springframework/beans/factory/ConcurrentBeanFactoryBenchmark-context.xml

@@ -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>

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

@@ -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);
 			}

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

@@ -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);

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

@@ -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;
 
 
 	/**

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

@@ -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;
+		}
 	}
 
 

spring-beans/src/main/java/org/springframework/beans/factory/config/PlaceholderConfigurerSupport.java

@@ -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

spring-beans/src/main/java/org/springframework/beans/factory/config/YamlProcessor.java

@@ -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) {

spring-beans/src/main/java/org/springframework/beans/factory/groovy/GroovyBeanDefinitionReader.java

@@ -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));
 				}
 			}

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

@@ -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);

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

@@ -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();

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

@@ -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()) {

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

@@ -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,

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

@@ -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;
+	}
+
 }

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

@@ -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();
 

spring-beans/src/main/java/org/springframework/beans/propertyeditors/LocaleEditor.java

@@ -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

spring-beans/src/main/java/org/springframework/beans/propertyeditors/PathEditor.java

@@ -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 {

spring-beans/src/main/java/org/springframework/beans/support/PropertyComparator.java

@@ -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);

spring-beans/src/test/java/org/springframework/beans/BeanUtilsTests.java

@@ -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();
+			}
+		}
+	}
+
 }

spring-beans/src/test/java/org/springframework/beans/BeanWrapperAutoGrowingTests.java

@@ -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;
 		}

spring-beans/src/test/java/org/springframework/beans/factory/annotation/AutowiredAnnotationBeanPostProcessorTests.java

@@ -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);

spring-beans/src/test/java/org/springframework/beans/factory/config/YamlProcessorTests.java

@@ -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 +141,23 @@ class YamlProcessorTests {
 	}
 
 	@Test
-	void customTypeSupportedByDefault() throws Exception {
+	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 +180,8 @@ 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) {

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

@@ -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

spring-beans/src/test/java/org/springframework/beans/propertyeditors/PathEditorTests.java

@@ -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();

spring-context-indexer/src/main/java/org/springframework/context/index/processor/CandidateComponentsIndexer.java

@@ -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;
@@ -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);
 			}
 		}

spring-context-indexer/src/main/java/org/springframework/context/index/processor/IndexedStereotypesProvider.java

@@ -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.
@@ -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<>();

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

@@ -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();

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

@@ -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:

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

@@ -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;

spring-context/src/main/java/org/springframework/context/ApplicationListener.java

@@ -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

spring-context/src/main/java/org/springframework/context/PayloadApplicationEvent.java

@@ -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 {

spring-context/src/main/java/org/springframework/context/ResourceLoaderAware.java

@@ -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

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

@@ -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);
+						}
 					}
 				}
 			}
@@ -427,7 +431,7 @@ public class ConfigurationClassPostProcessor implements BeanDefinitionRegistryPo
 				configBeanDefs.put(beanName, (AbstractBeanDefinition) beanDef);
 			}
 		}
-		if (configBeanDefs.isEmpty() || IN_NATIVE_IMAGE) {
+		if (configBeanDefs.isEmpty() || NativeDetector.inNativeImage()) {
 			// nothing to enhance -> return immediately
 			enhanceConfigClasses.end();
 			return;

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

@@ -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());
 		}

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

@@ -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) {

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

@@ -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();
 

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

@@ -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

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

@@ -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;
@@ -128,4 +129,13 @@ 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 org.springframework.context.ApplicationListener#getListenerId()
+	 * @see ApplicationEventMulticaster#removeApplicationListeners(Predicate)
+	 */
+	String id() default "";
+
 }

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

@@ -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.
@@ -18,9 +18,7 @@ package org.springframework.context.event;
 
 import org.springframework.context.ApplicationEvent;
 import org.springframework.context.ApplicationListener;
-import org.springframework.core.Ordered;
 import org.springframework.core.ResolvableType;
-import org.springframework.lang.Nullable;
 
 /**
  * Extended variant of the standard {@link ApplicationListener} interface,
@@ -28,13 +26,26 @@ import org.springframework.lang.Nullable;
  *
  * <p>As of Spring Framework 4.2, this interface supersedes the Class-based
  * {@link SmartApplicationListener} with full handling of generic event types.
+ * As of 5.3.5, it formally extends {@link SmartApplicationListener}, adapting
+ * {@link #supportsEventType(Class)} to {@link #supportsEventType(ResolvableType)}
+ * with a default method.
  *
  * @author Stephane Nicoll
+ * @author Juergen Hoeller
  * @since 4.2
  * @see SmartApplicationListener
  * @see GenericApplicationListenerAdapter
  */
-public interface GenericApplicationListener extends ApplicationListener<ApplicationEvent>, Ordered {
+public interface GenericApplicationListener extends SmartApplicationListener {
+
+	/**
+	 * Overrides {@link SmartApplicationListener#supportsEventType(Class)} with
+	 * delegation to {@link #supportsEventType(ResolvableType)}.
+	 */
+	@Override
+	default boolean supportsEventType(Class<? extends ApplicationEvent> eventType) {
+		return supportsEventType(ResolvableType.forClass(eventType));
+	}
 
 	/**
 	 * Determine whether this listener actually supports the given event type.
@@ -42,22 +53,4 @@ public interface GenericApplicationListener extends ApplicationListener<Applicat
 	 */
 	boolean supportsEventType(ResolvableType eventType);
 
-	/**
-	 * Determine whether this listener actually supports the given source type.
-	 * <p>The default implementation always returns {@code true}.
-	 * @param sourceType the source type, or {@code null} if no source
-	 */
-	default boolean supportsSourceType(@Nullable Class<?> sourceType) {
-		return true;
-	}
-
-	/**
-	 * Determine this listener's order in a set of listeners for the same event.
-	 * <p>The default implementation returns {@link #LOWEST_PRECEDENCE}.
-	 */
-	@Override
-	default int getOrder() {
-		return LOWEST_PRECEDENCE;
-	}
-
 }

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

@@ -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.
@@ -36,7 +36,7 @@ import org.springframework.util.ConcurrentReferenceHashMap;
  * @since 3.0
  * @see org.springframework.context.ApplicationListener#onApplicationEvent
  */
-public class GenericApplicationListenerAdapter implements GenericApplicationListener, SmartApplicationListener {
+public class GenericApplicationListenerAdapter implements GenericApplicationListener {
 
 	private static final Map<Class<?>, ResolvableType> eventTypeCache = new ConcurrentReferenceHashMap<>();
 
@@ -67,7 +67,10 @@ public class GenericApplicationListenerAdapter implements GenericApplicationList
 	@Override
 	@SuppressWarnings("unchecked")
 	public boolean supportsEventType(ResolvableType eventType) {
-		if (this.delegate instanceof SmartApplicationListener) {
+		if (this.delegate instanceof GenericApplicationListener) {
+			return ((GenericApplicationListener) this.delegate).supportsEventType(eventType);
+		}
+		else if (this.delegate instanceof SmartApplicationListener) {
 			Class<? extends ApplicationEvent> eventClass = (Class<? extends ApplicationEvent>) eventType.resolve();
 			return (eventClass != null && ((SmartApplicationListener) this.delegate).supportsEventType(eventClass));
 		}
@@ -76,11 +79,6 @@ public class GenericApplicationListenerAdapter implements GenericApplicationList
 		}
 	}
 
-	@Override
-	public boolean supportsEventType(Class<? extends ApplicationEvent> eventType) {
-		return supportsEventType(ResolvableType.forClass(eventType));
-	}
-
 	@Override
 	public boolean supportsSourceType(@Nullable Class<?> sourceType) {
 		return !(this.delegate instanceof SmartApplicationListener) ||
@@ -92,6 +90,12 @@ public class GenericApplicationListenerAdapter implements GenericApplicationList
 		return (this.delegate instanceof Ordered ? ((Ordered) this.delegate).getOrder() : Ordered.LOWEST_PRECEDENCE);
 	}
 
+	@Override
+	public String getListenerId() {
+		return (this.delegate instanceof SmartApplicationListener ?
+				((SmartApplicationListener) this.delegate).getListenerId() : "");
+	}
+
 
 	@Nullable
 	private static ResolvableType resolveDeclaredEventType(ApplicationListener<ApplicationEvent> listener) {

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

@@ -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 org.apache.commons.logging.LogFactory;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.context.ApplicationEvent;
 import org.springframework.context.ApplicationListener;
+import org.springframework.context.PayloadApplicationEvent;
 import org.springframework.core.ResolvableType;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ErrorHandler;
@@ -55,6 +56,9 @@ public class SimpleApplicationEventMulticaster extends AbstractApplicationEventM
 	@Nullable
 	private ErrorHandler errorHandler;
 
+	@Nullable
+	private volatile Log lazyLogger;
+
 
 	/**
 	 * Create a new SimpleApplicationEventMulticaster.
@@ -173,12 +177,18 @@ public class SimpleApplicationEventMulticaster extends AbstractApplicationEventM
 		}
 		catch (ClassCastException ex) {
 			String msg = ex.getMessage();
-			if (msg == null || matchesClassCastMessage(msg, event.getClass())) {
+			if (msg == null || matchesClassCastMessage(msg, event.getClass()) ||
+					(event instanceof PayloadApplicationEvent &&
+							matchesClassCastMessage(msg, ((PayloadApplicationEvent) event).getPayload().getClass()))) {
 				// Possibly a lambda-defined listener which we could not resolve the generic event type for
-				// -> let's suppress the exception and just log a debug message.
-				Log logger = LogFactory.getLog(getClass());
-				if (logger.isTraceEnabled()) {
-					logger.trace("Non-matching event type for listener: " + listener, ex);
+				// -> let's suppress the exception.
+				Log loggerToUse = this.lazyLogger;
+				if (loggerToUse == null) {
+					loggerToUse = LogFactory.getLog(getClass());
+					this.lazyLogger = loggerToUse;
+				}
+				if (loggerToUse.isTraceEnabled()) {
+					loggerToUse.trace("Non-matching event type for listener: " + listener, ex);
 				}
 			}
 			else {

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

@@ -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.
@@ -59,4 +59,15 @@ public interface SmartApplicationListener extends ApplicationListener<Applicatio
 		return LOWEST_PRECEDENCE;
 	}
 
+	/**
+	 * Return an optional identifier for the listener.
+	 * <p>The default value is an empty String.
+	 * @since 5.3.5
+	 * @see EventListener#id
+	 * @see ApplicationEventMulticaster#removeApplicationListeners
+	 */
+	default String getListenerId() {
+		return "";
+	}
+
 }

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

@@ -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.
@@ -34,7 +34,7 @@ import org.springframework.lang.Nullable;
  * @author Stephane Nicoll
  * @since 2.0.5
  */
-public class SourceFilteringListener implements GenericApplicationListener, SmartApplicationListener {
+public class SourceFilteringListener implements GenericApplicationListener {
 
 	private final Object source;
 
@@ -79,11 +79,6 @@ public class SourceFilteringListener implements GenericApplicationListener, Smar
 		return (this.delegate == null || this.delegate.supportsEventType(eventType));
 	}
 
-	@Override
-	public boolean supportsEventType(Class<? extends ApplicationEvent> eventType) {
-		return supportsEventType(ResolvableType.forType(eventType));
-	}
-
 	@Override
 	public boolean supportsSourceType(@Nullable Class<?> sourceType) {
 		return (sourceType != null && sourceType.isInstance(this.source));
@@ -94,6 +89,11 @@ public class SourceFilteringListener implements GenericApplicationListener, Smar
 		return (this.delegate != null ? this.delegate.getOrder() : Ordered.LOWEST_PRECEDENCE);
 	}
 
+	@Override
+	public String getListenerId() {
+		return (this.delegate != null ? this.delegate.getListenerId() : "");
+	}
+
 
 	/**
 	 * Actually process the event, after having filtered according to the

spring-context/src/main/java/org/springframework/context/index/CandidateComponentsIndexLoader.java

@@ -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.
@@ -48,13 +48,13 @@ public final class CandidateComponentsIndexLoader {
 	public static final String COMPONENTS_RESOURCE_LOCATION = "META-INF/spring.components";
 
 	/**
-	 * System property that instructs Spring to ignore the index, i.e.
+	 * System property that instructs Spring to ignore the components index, i.e.
 	 * to always return {@code null} from {@link #loadIndex(ClassLoader)}.
 	 * <p>The default is "false", allowing for regular use of the index. Switching this
 	 * flag to {@code true} fulfills a corner case scenario when an index is partially
 	 * available for some libraries (or use cases) but couldn't be built for the whole
 	 * application. In this case, the application context fallbacks to a regular
-	 * classpath arrangement (i.e. as no index was present at all).
+	 * classpath arrangement (i.e. as though no index were present at all).
 	 */
 	public static final String IGNORE_INDEX = "spring.index.ignore";
 

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

@@ -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.context.ApplicationEvent;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.context.ApplicationEventPublisherAware;
 import org.springframework.context.ApplicationListener;
+import org.springframework.context.ApplicationStartupAware;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.EmbeddedValueResolverAware;
 import org.springframework.context.EnvironmentAware;
@@ -66,6 +67,7 @@ import org.springframework.context.event.SimpleApplicationEventMulticaster;
 import org.springframework.context.expression.StandardBeanExpressionResolver;
 import org.springframework.context.weaving.LoadTimeWeaverAware;
 import org.springframework.context.weaving.LoadTimeWeaverAwareProcessor;
+import org.springframework.core.NativeDetector;
 import org.springframework.core.ResolvableType;
 import org.springframework.core.SpringProperties;
 import org.springframework.core.annotation.AnnotationUtils;
@@ -164,13 +166,6 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 	 */
 	private static final boolean shouldIgnoreSpel = SpringProperties.getFlag("spring.spel.ignore");
 
-	/**
-	 * 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);
-
 
 	static {
 		// Eagerly load the ContextClosedEvent class to avoid weird classloader issues
@@ -698,7 +693,7 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 		beanFactory.ignoreDependencyInterface(ApplicationEventPublisherAware.class);
 		beanFactory.ignoreDependencyInterface(MessageSourceAware.class);
 		beanFactory.ignoreDependencyInterface(ApplicationContextAware.class);
-		beanFactory.ignoreDependencyInterface(ApplicationStartup.class);
+		beanFactory.ignoreDependencyInterface(ApplicationStartupAware.class);
 
 		// BeanFactory interface not registered as resolvable type in a plain factory.
 		// MessageSource registered (and found for autowiring) as a bean.
@@ -711,7 +706,7 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 		beanFactory.addBeanPostProcessor(new ApplicationListenerDetector(this));
 
 		// Detect a LoadTimeWeaver and prepare for weaving, if found.
-		if (!IN_NATIVE_IMAGE && beanFactory.containsBean(LOAD_TIME_WEAVER_BEAN_NAME)) {
+		if (!NativeDetector.inNativeImage() && beanFactory.containsBean(LOAD_TIME_WEAVER_BEAN_NAME)) {
 			beanFactory.addBeanPostProcessor(new LoadTimeWeaverAwareProcessor(beanFactory));
 			// Set a temporary ClassLoader for type matching.
 			beanFactory.setTempClassLoader(new ContextTypeMatchClassLoader(beanFactory.getBeanClassLoader()));
@@ -752,7 +747,7 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 
 		// Detect a LoadTimeWeaver and prepare for weaving, if found in the meantime
 		// (e.g. through an @Bean method registered by ConfigurationClassPostProcessor)
-		if (!IN_NATIVE_IMAGE && beanFactory.getTempClassLoader() == null && beanFactory.containsBean(LOAD_TIME_WEAVER_BEAN_NAME)) {
+		if (!NativeDetector.inNativeImage() && beanFactory.getTempClassLoader() == null && beanFactory.containsBean(LOAD_TIME_WEAVER_BEAN_NAME)) {
 			beanFactory.addBeanPostProcessor(new LoadTimeWeaverAwareProcessor(beanFactory));
 			beanFactory.setTempClassLoader(new ContextTypeMatchClassLoader(beanFactory.getBeanClassLoader()));
 		}
@@ -900,8 +895,8 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 					beanFactory.getBean(CONVERSION_SERVICE_BEAN_NAME, ConversionService.class));
 		}
 
-		// Register a default embedded value resolver if no bean post-processor
-		// (such as a PropertyPlaceholderConfigurer bean) registered any before:
+		// Register a default embedded value resolver if no BeanFactoryPostProcessor
+		// (such as a PropertySourcesPlaceholderConfigurer bean) registered any before:
 		// at this point, primarily for resolution in annotation attribute values.
 		if (!beanFactory.hasEmbeddedValueResolver()) {
 			beanFactory.addEmbeddedValueResolver(strVal -> getEnvironment().resolvePlaceholders(strVal));
@@ -943,7 +938,7 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 		publishEvent(new ContextRefreshedEvent(this));
 
 		// Participate in LiveBeansView MBean, if active.
-		if (!IN_NATIVE_IMAGE) {
+		if (!NativeDetector.inNativeImage()) {
 			LiveBeansView.registerApplicationContext(this);
 		}
 	}
@@ -1054,7 +1049,7 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 				logger.debug("Closing " + this);
 			}
 
-			if (!IN_NATIVE_IMAGE) {
+			if (!NativeDetector.inNativeImage()) {
 				LiveBeansView.unregisterApplicationContext(this);
 			}
 

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

@@ -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.
@@ -17,6 +17,7 @@
 package org.springframework.context.support;
 
 import java.lang.reflect.Method;
+import java.security.ProtectionDomain;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -74,6 +75,11 @@ class ContextTypeMatchClassLoader extends DecoratingClassLoader implements Smart
 		return (clazz.getClassLoader() instanceof ContextOverridingClassLoader);
 	}
 
+	@Override
+	public Class<?> publicDefineClass(String name, byte[] b, @Nullable ProtectionDomain protectionDomain) {
+		return defineClass(name, b, 0, b.length, protectionDomain);
+	}
+
 
 	/**
 	 * ClassLoader to be created for each loaded class.

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

@@ -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.
@@ -57,17 +57,18 @@ public abstract class MessageSourceSupport {
 
 
 	/**
-	 * Set whether to always apply the {@code MessageFormat} rules,
-	 * parsing even messages without arguments.
-	 * <p>Default is "false": Messages without arguments are by default
-	 * returned as-is, without parsing them through MessageFormat.
-	 * Set this to "true" to enforce MessageFormat for all messages,
-	 * expecting all message texts to be written with MessageFormat escaping.
-	 * <p>For example, MessageFormat expects a single quote to be escaped
-	 * as "''". If your message texts are all written with such escaping,
-	 * even when not defining argument placeholders, you need to set this
-	 * flag to "true". Else, only message texts with actual arguments
-	 * are supposed to be written with MessageFormat escaping.
+	 * Set whether to always apply the {@code MessageFormat} rules, parsing even
+	 * messages without arguments.
+	 * <p>Default is {@code false}: Messages without arguments are by default
+	 * returned as-is, without parsing them through {@code MessageFormat}.
+	 * Set this to {@code true} to enforce {@code MessageFormat} for all messages,
+	 * expecting all message texts to be written with {@code MessageFormat} escaping.
+	 * <p>For example, {@code MessageFormat} expects a single quote to be escaped
+	 * as two adjacent single quotes ({@code "''"}). If your message texts are all
+	 * written with such escaping, even when not defining argument placeholders,
+	 * you need to set this flag to {@code true}. Otherwise, only message texts
+	 * with actual arguments are supposed to be written with {@code MessageFormat}
+	 * escaping.
 	 * @see java.text.MessageFormat
 	 */
 	public void setAlwaysUseMessageFormat(boolean alwaysUseMessageFormat) {
@@ -75,7 +76,7 @@ public abstract class MessageSourceSupport {
 	}
 
 	/**
-	 * Return whether to always apply the MessageFormat rules, parsing even
+	 * Return whether to always apply the {@code MessageFormat} rules, parsing even
 	 * messages without arguments.
 	 */
 	protected boolean isAlwaysUseMessageFormat() {
@@ -150,10 +151,10 @@ public abstract class MessageSourceSupport {
 	}
 
 	/**
-	 * Create a MessageFormat for the given message and Locale.
-	 * @param msg the message to create a MessageFormat for
-	 * @param locale the Locale to create a MessageFormat for
-	 * @return the MessageFormat instance
+	 * Create a {@code MessageFormat} for the given message and Locale.
+	 * @param msg the message to create a {@code MessageFormat} for
+	 * @param locale the Locale to create a {@code MessageFormat} for
+	 * @return the {@code MessageFormat} instance
 	 */
 	protected MessageFormat createMessageFormat(String msg, Locale locale) {
 		return new MessageFormat(msg, locale);

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

@@ -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.
@@ -59,6 +59,19 @@ final class PostProcessorRegistrationDelegate {
 	public static void invokeBeanFactoryPostProcessors(
 			ConfigurableListableBeanFactory beanFactory, List<BeanFactoryPostProcessor> beanFactoryPostProcessors) {
 
+		// WARNING: Although it may appear that the body of this method can be easily
+		// refactored to avoid the use of multiple loops and multiple lists, the use
+		// of multiple lists and multiple passes over the names of processors is
+		// intentional. We must ensure that we honor the contracts for PriorityOrdered
+		// and Ordered processors. Specifically, we must NOT cause processors to be
+		// instantiated (via getBean() invocations) or registered in the ApplicationContext
+		// in the wrong order.
+		//
+		// Before submitting a pull request (PR) to change this method, please review the
+		// list of all declined PRs involving changes to PostProcessorRegistrationDelegate
+		// to ensure that your proposal does not result in a breaking change:
+		// https://github.com/spring-projects/spring-framework/issues?q=PostProcessorRegistrationDelegate+is%3Aclosed+label%3A%22status%3A+declined%22
+
 		// Invoke BeanDefinitionRegistryPostProcessors first, if any.
 		Set<String> processedBeans = new HashSet<>();
 
@@ -192,6 +205,19 @@ final class PostProcessorRegistrationDelegate {
 	public static void registerBeanPostProcessors(
 			ConfigurableListableBeanFactory beanFactory, AbstractApplicationContext applicationContext) {
 
+		// WARNING: Although it may appear that the body of this method can be easily
+		// refactored to avoid the use of multiple loops and multiple lists, the use
+		// of multiple lists and multiple passes over the names of processors is
+		// intentional. We must ensure that we honor the contracts for PriorityOrdered
+		// and Ordered processors. Specifically, we must NOT cause processors to be
+		// instantiated (via getBean() invocations) or registered in the ApplicationContext
+		// in the wrong order.
+		//
+		// Before submitting a pull request (PR) to change this method, please review the
+		// list of all declined PRs involving changes to PostProcessorRegistrationDelegate
+		// to ensure that your proposal does not result in a breaking change:
+		// https://github.com/spring-projects/spring-framework/issues?q=PostProcessorRegistrationDelegate+is%3Aclosed+label%3A%22status%3A+declined%22
+
 		String[] postProcessorNames = beanFactory.getBeanNamesForType(BeanPostProcessor.class, true, false);
 
 		// Register BeanPostProcessorChecker that logs an info message when

spring-context/src/main/java/org/springframework/format/annotation/DateTimeFormat.java

@@ -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.
@@ -26,27 +26,44 @@ import java.lang.annotation.Target;
  * Declares that a field or method parameter should be formatted as a date or time.
  *
  * <p>Supports formatting by style pattern, ISO date time pattern, or custom format pattern string.
- * Can be applied to {@code java.util.Date}, {@code java.util.Calendar}, {@code Long} (for
- * millisecond timestamps) as well as JSR-310 <code>java.time</code> and Joda-Time value types.
+ * Can be applied to {@link java.util.Date}, {@link java.util.Calendar}, {@link Long} (for
+ * millisecond timestamps) as well as JSR-310 {@code java.time} value types.
  *
- * <p>For style-based formatting, set the {@link #style} attribute to be the style pattern code.
+ * <p>For style-based formatting, set the {@link #style} attribute to the desired style pattern code.
  * The first character of the code is the date style, and the second character is the time style.
  * Specify a character of 'S' for short style, 'M' for medium, 'L' for long, and 'F' for full.
- * A date or time may be omitted by specifying the style character '-'.
+ * The date or time may be omitted by specifying the style character '-' &mdash; for example,
+ * 'M-' specifies a medium format for the date with no time.
  *
- * <p>For ISO-based formatting, set the {@link #iso} attribute to be the desired {@link ISO} format,
- * such as {@link ISO#DATE}. For custom formatting, set the {@link #pattern} attribute to be the
- * DateTime pattern, such as {@code yyyy/MM/dd hh:mm:ss a}.
+ * <p>For ISO-based formatting, set the {@link #iso} attribute to the desired {@link ISO} format,
+ * such as {@link ISO#DATE}.
+ *
+ * <p>For custom formatting, set the {@link #pattern} attribute to a date time pattern, such as
+ * {@code "yyyy/MM/dd hh:mm:ss a"}.
  *
  * <p>Each attribute is mutually exclusive, so only set one attribute per annotation instance
- * (the one most convenient one for your formatting needs).
- * When the pattern attribute is specified, it takes precedence over both the style and ISO attribute.
- * When the {@link #iso} attribute is specified, it takes precedence over the style attribute.
- * When no annotation attributes are specified, the default format applied is style-based
- * with a style code of 'SS' (short date, short time).
+ * (the one most convenient for your formatting needs).
+ *
+ * <ul>
+ * <li>When the pattern attribute is specified, it takes precedence over both the style and ISO attribute.</li>
+ * <li>When the {@link #iso} attribute is specified, it takes precedence over the style attribute.</li>
+ * <li>When no annotation attributes are specified, the default format applied is style-based
+ * with a style code of 'SS' (short date, short time).</li>
+ * </ul>
+ *
+ * <h3>Time Zones</h3>
+ * <p>Whenever the {@link #style} or {@link #pattern} attribute is used, the
+ * {@linkplain java.util.TimeZone#getDefault() default time zone} of the JVM will
+ * be used when formatting {@link java.util.Date} values. Whenever the {@link #iso}
+ * attribute is used when formatting {@link java.util.Date} values, {@code UTC}
+ * will be used as the time zone. The same time zone will be applied to any
+ * {@linkplain #fallbackPatterns fallback patterns} as well. In order to enforce
+ * consistent use of {@code UTC} as the time zone, you can bootstrap the JVM with
+ * {@code -Duser.timezone=UTC}.
  *
  * @author Keith Donald
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 3.0
  * @see java.time.format.DateTimeFormatter
  * @see org.joda.time.format.DateTimeFormat
@@ -57,34 +74,59 @@ import java.lang.annotation.Target;
 public @interface DateTimeFormat {
 
 	/**
-	 * The style pattern to use to format the field.
-	 * <p>Defaults to 'SS' for short date time. Set this attribute when you wish to format
-	 * your field in accordance with a common style other than the default style.
+	 * The style pattern to use to format the field or method parameter.
+	 * <p>Defaults to 'SS' for short date, short time. Set this attribute when you
+	 * wish to format your field or method parameter in accordance with a common
+	 * style other than the default style.
+	 * @see #fallbackPatterns
 	 */
 	String style() default "SS";
 
 	/**
-	 * The ISO pattern to use to format the field.
-	 * <p>The possible ISO patterns are defined in the {@link ISO} enum.
+	 * The ISO pattern to use to format the field or method parameter.
+	 * <p>Supported ISO patterns are defined in the {@link ISO} enum.
 	 * <p>Defaults to {@link ISO#NONE}, indicating this attribute should be ignored.
-	 * Set this attribute when you wish to format your field in accordance with an ISO format.
+	 * Set this attribute when you wish to format your field or method parameter
+	 * in accordance with an ISO format.
+	 * @see #fallbackPatterns
 	 */
 	ISO iso() default ISO.NONE;
 
 	/**
-	 * The custom pattern to use to format the field.
-	 * <p>Defaults to empty String, indicating no custom pattern String has been specified.
-	 * Set this attribute when you wish to format your field in accordance with a custom
-	 * date time pattern not represented by a style or ISO format.
+	 * The custom pattern to use to format the field or method parameter.
+	 * <p>Defaults to empty String, indicating no custom pattern String has been
+	 * specified. Set this attribute when you wish to format your field or method
+	 * parameter in accordance with a custom date time pattern not represented by
+	 * a style or ISO format.
 	 * <p>Note: This pattern follows the original {@link java.text.SimpleDateFormat} style,
 	 * as also supported by Joda-Time, with strict parsing semantics towards overflows
 	 * (e.g. rejecting a Feb 29 value for a non-leap-year). As a consequence, 'yy'
 	 * characters indicate a year in the traditional style, not a "year-of-era" as in the
 	 * {@link java.time.format.DateTimeFormatter} specification (i.e. 'yy' turns into 'uu'
-	 * when going through that {@code DateTimeFormatter} with strict resolution mode).
+	 * when going through a {@code DateTimeFormatter} with strict resolution mode).
+	 * @see #fallbackPatterns
 	 */
 	String pattern() default "";
 
+	/**
+	 * The set of custom patterns to use as a fallback in case parsing fails for
+	 * the primary {@link #pattern}, {@link #iso}, or {@link #style} attribute.
+	 * <p>For example, if you wish to use the ISO date format for parsing and
+	 * printing but allow for lenient parsing of user input for various date
+	 * formats, you could configure something similar to the following.
+	 * <pre style="code">
+	 * {@literal @}DateTimeFormat(iso = ISO.DATE, fallbackPatterns = { "M/d/yy", "dd.MM.yyyy" })
+	 * </pre>
+	 * <p>Fallback patterns are only used for parsing. They are not used for
+	 * printing the value as a String. The primary {@link #pattern}, {@link #iso},
+	 * or {@link #style} attribute is always used for printing. For details on
+	 * which time zone is used for fallback patterns, see the
+	 * {@linkplain DateTimeFormat class-level documentation}.
+	 * <p>Fallback patterns are not supported for Joda-Time value types.
+	 * @since 5.3.5
+	 */
+	String[] fallbackPatterns() default {};
+
 
 	/**
 	 * Common ISO date time format patterns.
@@ -92,20 +134,20 @@ public @interface DateTimeFormat {
 	enum ISO {
 
 		/**
-		 * The most common ISO Date Format {@code yyyy-MM-dd},
-		 * e.g. "2000-10-31".
+		 * The most common ISO Date Format {@code yyyy-MM-dd} &mdash; for example,
+		 * "2000-10-31".
 		 */
 		DATE,
 
 		/**
-		 * The most common ISO Time Format {@code HH:mm:ss.SSSXXX},
-		 * e.g. "01:30:00.000-05:00".
+		 * The most common ISO Time Format {@code HH:mm:ss.SSSXXX} &mdash; for example,
+		 * "01:30:00.000-05:00".
 		 */
 		TIME,
 
 		/**
-		 * The most common ISO DateTime Format {@code yyyy-MM-dd'T'HH:mm:ss.SSSXXX},
-		 * e.g. "2000-10-31T01:30:00.000-05:00".
+		 * The most common ISO Date Time Format {@code yyyy-MM-dd'T'HH:mm:ss.SSSXXX}
+		 * &mdash; for example, "2000-10-31T01:30:00.000-05:00".
 		 */
 		DATE_TIME,
 

spring-context/src/main/java/org/springframework/format/datetime/DateFormatter.java

@@ -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.
@@ -27,17 +27,21 @@ import java.util.Map;
 import java.util.TimeZone;
 
 import org.springframework.format.Formatter;
+import org.springframework.format.annotation.DateTimeFormat;
 import org.springframework.format.annotation.DateTimeFormat.ISO;
 import org.springframework.lang.Nullable;
+import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 
 /**
  * A formatter for {@link java.util.Date} types.
- * Allows the configuration of an explicit date pattern and locale.
+ * <p>Supports the configuration of an explicit date time pattern, timezone,
+ * locale, and fallback date time patterns for lenient parsing.
  *
  * @author Keith Donald
  * @author Juergen Hoeller
  * @author Phillip Webb
+ * @author Sam Brannen
  * @since 3.0
  * @see SimpleDateFormat
  */
@@ -56,9 +60,15 @@ public class DateFormatter implements Formatter<Date> {
 	}
 
 
+	@Nullable
+	private Object source;
+
 	@Nullable
 	private String pattern;
 
+	@Nullable
+	private String[] fallbackPatterns;
+
 	private int style = DateFormat.DEFAULT;
 
 	@Nullable
@@ -74,19 +84,33 @@ public class DateFormatter implements Formatter<Date> {
 
 
 	/**
-	 * Create a new default DateFormatter.
+	 * Create a new default {@code DateFormatter}.
 	 */
 	public DateFormatter() {
 	}
 
 	/**
-	 * Create a new DateFormatter for the given date pattern.
+	 * Create a new {@code DateFormatter} for the given date time pattern.
 	 */
 	public DateFormatter(String pattern) {
 		this.pattern = pattern;
 	}
 
 
+	/**
+	 * Set the source of the configuration for this {@code DateFormatter} &mdash;
+	 * for example, an instance of the {@link DateTimeFormat @DateTimeFormat}
+	 * annotation if such an annotation was used to configure this {@code DateFormatter}.
+	 * <p>The supplied source object will only be used for descriptive purposes
+	 * by invoking its {@code toString()} method &mdash; for example, when
+	 * generating an exception message to provide further context.
+	 * @param source the source of the configuration
+	 * @since 5.3.5
+	 */
+	public void setSource(Object source) {
+		this.source = source;
+	}
+
 	/**
 	 * Set the pattern to use to format date values.
 	 * <p>If not specified, DateFormat's default style will be used.
@@ -96,7 +120,19 @@ public class DateFormatter implements Formatter<Date> {
 	}
 
 	/**
-	 * Set the ISO format used for this date.
+	 * Set additional patterns to use as a fallback in case parsing fails for the
+	 * configured {@linkplain #setPattern pattern}, {@linkplain #setIso ISO format},
+	 * {@linkplain #setStyle style}, or {@linkplain #setStylePattern style pattern}.
+	 * @param fallbackPatterns the fallback parsing patterns
+	 * @since 5.3.5
+	 * @see DateTimeFormat#fallbackPatterns()
+	 */
+	public void setFallbackPatterns(String... fallbackPatterns) {
+		this.fallbackPatterns = fallbackPatterns;
+	}
+
+	/**
+	 * Set the ISO format to use to format date values.
 	 * @param iso the {@link ISO} format
 	 * @since 3.2
 	 */
@@ -105,7 +141,7 @@ public class DateFormatter implements Formatter<Date> {
 	}
 
 	/**
-	 * Set the style to use to format date values.
+	 * Set the {@link DateFormat} style to use to format date values.
 	 * <p>If not specified, DateFormat's default style will be used.
 	 * @see DateFormat#DEFAULT
 	 * @see DateFormat#SHORT
@@ -118,8 +154,10 @@ public class DateFormatter implements Formatter<Date> {
 	}
 
 	/**
-	 * Set the two character to use to format date values. The first character used for
-	 * the date style, the second is for the time style. Supported characters are
+	 * Set the two characters to use to format date values.
+	 * <p>The first character is used for the date style; the second is used for
+	 * the time style.
+	 * <p>Supported characters:
 	 * <ul>
 	 * <li>'S' = Small</li>
 	 * <li>'M' = Medium</li>
@@ -136,7 +174,7 @@ public class DateFormatter implements Formatter<Date> {
 	}
 
 	/**
-	 * Set the TimeZone to normalize the date values into, if any.
+	 * Set the {@link TimeZone} to normalize the date values into, if any.
 	 */
 	public void setTimeZone(TimeZone timeZone) {
 		this.timeZone = timeZone;
@@ -159,12 +197,45 @@ public class DateFormatter implements Formatter<Date> {
 
 	@Override
 	public Date parse(String text, Locale locale) throws ParseException {
-		return getDateFormat(locale).parse(text);
+		try {
+			return getDateFormat(locale).parse(text);
+		}
+		catch (ParseException ex) {
+			if (!ObjectUtils.isEmpty(this.fallbackPatterns)) {
+				for (String pattern : this.fallbackPatterns) {
+					try {
+						DateFormat dateFormat = configureDateFormat(new SimpleDateFormat(pattern, locale));
+						// Align timezone for parsing format with printing format if ISO is set.
+						if (this.iso != null && this.iso != ISO.NONE) {
+							dateFormat.setTimeZone(UTC);
+						}
+						return dateFormat.parse(text);
+					}
+					catch (ParseException ignoredException) {
+						// Ignore fallback parsing exceptions since the exception thrown below
+						// will include information from the "source" if available -- for example,
+						// the toString() of a @DateTimeFormat annotation.
+					}
+				}
+			}
+			if (this.source != null) {
+				ParseException parseException = new ParseException(
+					String.format("Unable to parse date time value \"%s\" using configuration from %s", text, this.source),
+					ex.getErrorOffset());
+				parseException.initCause(ex);
+				throw parseException;
+			}
+			// else rethrow original exception
+			throw ex;
+		}
 	}
 
 
 	protected DateFormat getDateFormat(Locale locale) {
-		DateFormat dateFormat = createDateFormat(locale);
+		return configureDateFormat(createDateFormat(locale));
+	}
+
+	private DateFormat configureDateFormat(DateFormat dateFormat) {
 		if (this.timeZone != null) {
 			dateFormat.setTimeZone(this.timeZone);
 		}

spring-context/src/main/java/org/springframework/format/datetime/DateTimeFormatAnnotationFormatterFactory.java

@@ -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.
@@ -16,10 +16,12 @@
 
 package org.springframework.format.datetime;
 
+import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.Collections;
 import java.util.Date;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Set;
 
 import org.springframework.context.support.EmbeddedValueResolutionSupport;
@@ -34,6 +36,7 @@ import org.springframework.util.StringUtils;
  * Formats fields annotated with the {@link DateTimeFormat} annotation using a {@link DateFormatter}.
  *
  * @author Phillip Webb
+ * @author Sam Brannen
  * @since 3.2
  * @see org.springframework.format.datetime.joda.JodaDateTimeFormatAnnotationFormatterFactory
  */
@@ -68,15 +71,30 @@ public class DateTimeFormatAnnotationFormatterFactory  extends EmbeddedValueReso
 
 	protected Formatter<Date> getFormatter(DateTimeFormat annotation, Class<?> fieldType) {
 		DateFormatter formatter = new DateFormatter();
+		formatter.setSource(annotation);
+		formatter.setIso(annotation.iso());
+
 		String style = resolveEmbeddedValue(annotation.style());
 		if (StringUtils.hasLength(style)) {
 			formatter.setStylePattern(style);
 		}
-		formatter.setIso(annotation.iso());
+
 		String pattern = resolveEmbeddedValue(annotation.pattern());
 		if (StringUtils.hasLength(pattern)) {
 			formatter.setPattern(pattern);
 		}
+
+		List<String> resolvedFallbackPatterns = new ArrayList<>();
+		for (String fallbackPattern : annotation.fallbackPatterns()) {
+			String resolvedFallbackPattern = resolveEmbeddedValue(fallbackPattern);
+			if (StringUtils.hasLength(resolvedFallbackPattern)) {
+				resolvedFallbackPatterns.add(resolvedFallbackPattern);
+			}
+		}
+		if (!resolvedFallbackPatterns.isEmpty()) {
+			formatter.setFallbackPatterns(resolvedFallbackPatterns.toArray(new String[0]));
+		}
+
 		return formatter;
 	}
 

spring-context/src/main/java/org/springframework/format/datetime/standard/DateTimeContext.java

@@ -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.
@@ -29,7 +29,7 @@ import org.springframework.lang.Nullable;
 /**
  * A context that holds user-specific <code>java.time</code> (JSR-310) settings
  * such as the user's Chronology (calendar system) and time zone.
- * A {@code null} property value indicate the user has not specified a setting.
+ * <p>A {@code null} property value indicates the user has not specified a setting.
  *
  * @author Juergen Hoeller
  * @since 4.0
@@ -81,8 +81,8 @@ public class DateTimeContext {
 
 
 	/**
-	 * Get the DateTimeFormatter with the this context's settings
-	 * applied to the base {@code formatter}.
+	 * Get the DateTimeFormatter with this context's settings applied to the
+	 * base {@code formatter}.
 	 * @param formatter the base formatter that establishes default
 	 * formatting rules, generally context-independent
 	 * @return the contextual DateTimeFormatter

spring-context/src/main/java/org/springframework/format/datetime/standard/DateTimeContextHolder.java

@@ -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.
@@ -69,9 +69,8 @@ public final class DateTimeContextHolder {
 		return dateTimeContextHolder.get();
 	}
 
-
 	/**
-	 * Obtain a DateTimeFormatter with user-specific settings applied to the given base Formatter.
+	 * Obtain a DateTimeFormatter with user-specific settings applied to the given base formatter.
 	 * @param formatter the base formatter that establishes default formatting rules
 	 * (generally user independent)
 	 * @param locale the current user locale (may be {@code null} if not known)

spring-context/src/main/java/org/springframework/format/datetime/standard/DateTimeFormatterFactory.java

@@ -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.
@@ -18,7 +18,6 @@ package org.springframework.format.datetime.standard;
 
 import java.time.format.DateTimeFormatter;
 import java.time.format.FormatStyle;
-import java.time.format.ResolverStyle;
 import java.util.TimeZone;
 
 import org.springframework.format.annotation.DateTimeFormat.ISO;
@@ -34,6 +33,7 @@ import org.springframework.util.StringUtils;
  *
  * @author Juergen Hoeller
  * @author Phillip Webb
+ * @author Sam Brannen
  * @since 4.0
  * @see #createDateTimeFormatter()
  * @see #createDateTimeFormatter(DateTimeFormatter)
@@ -180,11 +180,7 @@ public class DateTimeFormatterFactory {
 	public DateTimeFormatter createDateTimeFormatter(DateTimeFormatter fallbackFormatter) {
 		DateTimeFormatter dateTimeFormatter = null;
 		if (StringUtils.hasLength(this.pattern)) {
-			// Using strict parsing to align with Joda-Time and standard DateFormat behavior:
-			// otherwise, an overflow like e.g. Feb 29 for a non-leap-year wouldn't get rejected.
-			// However, with strict parsing, a year digit needs to be specified as 'u'...
-			String patternToUse = StringUtils.replace(this.pattern, "yy", "uu");
-			dateTimeFormatter = DateTimeFormatter.ofPattern(patternToUse).withResolverStyle(ResolverStyle.STRICT);
+			dateTimeFormatter = DateTimeFormatterUtils.createStrictDateTimeFormatter(this.pattern);
 		}
 		else if (this.iso != null && this.iso != ISO.NONE) {
 			switch (this.iso) {

spring-context/src/main/java/org/springframework/format/datetime/standard/DateTimeFormatterUtils.java

@@ -0,0 +1,40 @@
+/*
+ * 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.format.datetime.standard;
+
+import java.time.format.DateTimeFormatter;
+import java.time.format.ResolverStyle;
+
+import org.springframework.util.StringUtils;
+
+/**
+ * Internal {@link DateTimeFormatter} utilities.
+ *
+ * @author Juergen Hoeller
+ * @since 5.3.5
+ */
+abstract class DateTimeFormatterUtils {
+
+	static DateTimeFormatter createStrictDateTimeFormatter(String pattern) {
+		// Using strict parsing to align with Joda-Time and standard DateFormat behavior:
+		// otherwise, an overflow like e.g. Feb 29 for a non-leap-year wouldn't get rejected.
+		// However, with strict parsing, a year digit needs to be specified as 'u'...
+		String patternToUse = StringUtils.replace(pattern, "yy", "uu");
+		return DateTimeFormatter.ofPattern(patternToUse).withResolverStyle(ResolverStyle.STRICT);
+	}
+
+}

spring-context/src/main/java/org/springframework/format/datetime/standard/Jsr310DateTimeFormatAnnotationFormatterFactory.java

@@ -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.
@@ -24,8 +24,10 @@ import java.time.OffsetTime;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.temporal.TemporalAccessor;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Set;
 
 import org.springframework.context.support.EmbeddedValueResolutionSupport;
@@ -40,6 +42,7 @@ import org.springframework.util.StringUtils;
  * JSR-310 <code>java.time</code> package in JDK 8.
  *
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 4.0
  * @see org.springframework.format.annotation.DateTimeFormat
  */
@@ -93,8 +96,17 @@ public class Jsr310DateTimeFormatAnnotationFormatterFactory extends EmbeddedValu
 	@Override
 	@SuppressWarnings("unchecked")
 	public Parser<?> getParser(DateTimeFormat annotation, Class<?> fieldType) {
+		List<String> resolvedFallbackPatterns = new ArrayList<>();
+		for (String fallbackPattern : annotation.fallbackPatterns()) {
+			String resolvedFallbackPattern = resolveEmbeddedValue(fallbackPattern);
+			if (StringUtils.hasLength(resolvedFallbackPattern)) {
+				resolvedFallbackPatterns.add(resolvedFallbackPattern);
+			}
+		}
+
 		DateTimeFormatter formatter = getFormatter(annotation, fieldType);
-		return new TemporalAccessorParser((Class<? extends TemporalAccessor>) fieldType, formatter);
+		return new TemporalAccessorParser((Class<? extends TemporalAccessor>) fieldType,
+				formatter, resolvedFallbackPatterns.toArray(new String[0]), annotation);
 	}
 
 	/**

spring-context/src/main/java/org/springframework/format/datetime/standard/TemporalAccessorParser.java

@@ -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.
@@ -24,16 +24,20 @@ import java.time.OffsetDateTime;
 import java.time.OffsetTime;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
 import java.time.temporal.TemporalAccessor;
 import java.util.Locale;
 
 import org.springframework.format.Parser;
+import org.springframework.lang.Nullable;
+import org.springframework.util.ObjectUtils;
 
 /**
  * {@link Parser} implementation for a JSR-310 {@link java.time.temporal.TemporalAccessor},
- * using a {@link java.time.format.DateTimeFormatter}) (the contextual one, if available).
+ * using a {@link java.time.format.DateTimeFormatter} (the contextual one, if available).
  *
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 4.0
  * @see DateTimeContextHolder#getFormatter
  * @see java.time.LocalDate#parse(CharSequence, java.time.format.DateTimeFormatter)
@@ -49,6 +53,12 @@ public final class TemporalAccessorParser implements Parser<TemporalAccessor> {
 
 	private final DateTimeFormatter formatter;
 
+	@Nullable
+	private final String[] fallbackPatterns;
+
+	@Nullable
+	private final Object source;
+
 
 	/**
 	 * Create a new TemporalAccessorParser for the given TemporalAccessor type.
@@ -57,14 +67,49 @@ public final class TemporalAccessorParser implements Parser<TemporalAccessor> {
 	 * @param formatter the base DateTimeFormatter instance
 	 */
 	public TemporalAccessorParser(Class<? extends TemporalAccessor> temporalAccessorType, DateTimeFormatter formatter) {
+		this(temporalAccessorType, formatter, null, null);
+	}
+
+	TemporalAccessorParser(Class<? extends TemporalAccessor> temporalAccessorType, DateTimeFormatter formatter,
+		@Nullable String[] fallbackPatterns, @Nullable Object source) {
 		this.temporalAccessorType = temporalAccessorType;
 		this.formatter = formatter;
+		this.fallbackPatterns = fallbackPatterns;
+		this.source = source;
 	}
 
 
 	@Override
 	public TemporalAccessor parse(String text, Locale locale) throws ParseException {
-		DateTimeFormatter formatterToUse = DateTimeContextHolder.getFormatter(this.formatter, locale);
+		try {
+			return doParse(text, locale, this.formatter);
+		}
+		catch (DateTimeParseException ex) {
+			if (!ObjectUtils.isEmpty(this.fallbackPatterns)) {
+				for (String pattern : this.fallbackPatterns) {
+					try {
+						DateTimeFormatter fallbackFormatter = DateTimeFormatterUtils.createStrictDateTimeFormatter(pattern);
+						return doParse(text, locale, fallbackFormatter);
+					}
+					catch (DateTimeParseException ignoredException) {
+						// Ignore fallback parsing exceptions since the exception thrown below
+						// will include information from the "source" if available -- for example,
+						// the toString() of a @DateTimeFormat annotation.
+					}
+				}
+			}
+			if (this.source != null) {
+				throw new DateTimeParseException(
+					String.format("Unable to parse date time value \"%s\" using configuration from %s", text, this.source),
+					text, ex.getErrorIndex(), ex);
+			}
+			// else rethrow original exception
+			throw ex;
+		}
+	}
+
+	private TemporalAccessor doParse(String text, Locale locale, DateTimeFormatter formatter) throws DateTimeParseException {
+		DateTimeFormatter formatterToUse = DateTimeContextHolder.getFormatter(formatter, locale);
 		if (LocalDate.class == this.temporalAccessorType) {
 			return LocalDate.parse(text, formatterToUse);
 		}

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

@@ -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.
@@ -85,7 +85,7 @@ public @interface Scheduled {
 	 * trigger, primarily meant for externally specified values resolved by a
 	 * <code>${...}</code> placeholder.
 	 * @return an expression that can be parsed to a cron schedule
-	 * @see org.springframework.scheduling.support.CronSequenceGenerator
+	 * @see org.springframework.scheduling.support.CronExpression#parse(String)
 	 */
 	String cron() default "";
 

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

@@ -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.
@@ -358,9 +358,9 @@ public class ScheduledAnnotationBeanPostProcessor
 				AnnotationUtils.isCandidateClass(targetClass, Arrays.asList(Scheduled.class, Schedules.class))) {
 			Map<Method, Set<Scheduled>> annotatedMethods = MethodIntrospector.selectMethods(targetClass,
 					(MethodIntrospector.MetadataLookup<Set<Scheduled>>) method -> {
-						Set<Scheduled> scheduledMethods = AnnotatedElementUtils.getMergedRepeatableAnnotations(
+						Set<Scheduled> scheduledAnnotations = AnnotatedElementUtils.getMergedRepeatableAnnotations(
 								method, Scheduled.class, Schedules.class);
-						return (!scheduledMethods.isEmpty() ? scheduledMethods : null);
+						return (!scheduledAnnotations.isEmpty() ? scheduledAnnotations : null);
 					});
 			if (annotatedMethods.isEmpty()) {
 				this.nonAnnotatedClasses.add(targetClass);
@@ -370,8 +370,8 @@ public class ScheduledAnnotationBeanPostProcessor
 			}
 			else {
 				// Non-empty set of methods
-				annotatedMethods.forEach((method, scheduledMethods) ->
-						scheduledMethods.forEach(scheduled -> processScheduled(scheduled, method, bean)));
+				annotatedMethods.forEach((method, scheduledAnnotations) ->
+						scheduledAnnotations.forEach(scheduled -> processScheduled(scheduled, method, bean)));
 				if (logger.isTraceEnabled()) {
 					logger.trace(annotatedMethods.size() + " @Scheduled methods processed on bean '" + beanName +
 							"': " + annotatedMethods);

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

@@ -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.
@@ -177,8 +177,8 @@ public abstract class ExecutorConfigurationSupport extends CustomizableThreadFac
 	 * Set up the ExecutorService.
 	 */
 	public void initialize() {
-		if (logger.isInfoEnabled()) {
-			logger.info("Initializing ExecutorService" + (this.beanName != null ? " '" + this.beanName + "'" : ""));
+		if (logger.isDebugEnabled()) {
+			logger.debug("Initializing ExecutorService" + (this.beanName != null ? " '" + this.beanName + "'" : ""));
 		}
 		if (!this.threadNamePrefixSet && this.beanName != null) {
 			setThreadNamePrefix(this.beanName + "-");
@@ -214,8 +214,8 @@ public abstract class ExecutorConfigurationSupport extends CustomizableThreadFac
 	 * @see java.util.concurrent.ExecutorService#shutdownNow()
 	 */
 	public void shutdown() {
-		if (logger.isInfoEnabled()) {
-			logger.info("Shutting down ExecutorService" + (this.beanName != null ? " '" + this.beanName + "'" : ""));
+		if (logger.isDebugEnabled()) {
+			logger.debug("Shutting down ExecutorService" + (this.beanName != null ? " '" + this.beanName + "'" : ""));
 		}
 		if (this.executor != null) {
 			if (this.waitForTasksToCompleteOnShutdown) {