Merge branch '5.3.x'

# Conflicts:
#	build.gradle
#	spring-web/src/main/java/org/springframework/web/server/MediaTypeNotSupportedStatusException.java
#	spring-web/src/main/java/org/springframework/web/util/ContentCachingRequestWrapper.java
#	spring-webmvc/src/main/java/org/springframework/web/servlet/handler/HandlerMappingIntrospector.java

build.gradle

@@ -64,8 +64,8 @@ configure(allprojects) { project ->
 				entry 'groovy-xml'
 			}
 
-			dependency "io.reactivex.rxjava3:rxjava:3.1.2"
-			dependency "io.smallrye.reactive:mutiny:1.1.1"
+			dependency "io.reactivex.rxjava3:rxjava:3.1.3"
+			dependency "io.smallrye.reactive:mutiny:1.2.0"
 			dependency "io.projectreactor.tools:blockhound:1.0.6.RELEASE"
 
 			dependency "com.fasterxml:aalto-xml:1.3.0"
@@ -117,18 +117,18 @@ configure(allprojects) { project ->
 			dependency "org.webjars:webjars-locator-core:0.48"
 			dependency "org.webjars:underscorejs:1.8.3"
 
-			dependencySet(group: 'org.apache.tomcat', version: '10.0.12') {
+			dependencySet(group: 'org.apache.tomcat', version: '10.0.13') {
 				entry 'tomcat-util'
 				entry('tomcat-websocket') {
 					exclude group: "org.apache.tomcat", name: "tomcat-servlet-api"
 					exclude group: "org.apache.tomcat", name: "tomcat-websocket-api"
 				}
 			}
-			dependencySet(group: 'org.apache.tomcat.embed', version: '10.0.12') {
+			dependencySet(group: 'org.apache.tomcat.embed', version: '10.0.13') {
 				entry 'tomcat-embed-core'
 				entry 'tomcat-embed-websocket'
 			}
-			dependencySet(group: 'io.undertow', version: '2.2.12.Final') {
+			dependencySet(group: 'io.undertow', version: '2.2.13.Final') {
 				entry 'undertow-core'
 				entry 'undertow-servlet-jakartaee9'
 				entry 'undertow-websockets-jsr-jakartaee9'
@@ -148,7 +148,7 @@ configure(allprojects) { project ->
 			dependency 'org.apache.httpcomponents.core5:httpcore5-reactive:5.1.1'
 			dependency "org.eclipse.jetty:jetty-reactive-httpclient:3.0.4"
 
-			dependency "org.jruby:jruby:9.3.1.0"
+			dependency "org.jruby:jruby:9.3.2.0"
 			dependency "org.python:jython-standalone:2.7.1"
 			dependency "org.mozilla:rhino:1.7.11"
 
@@ -188,10 +188,10 @@ configure(allprojects) { project ->
 			}
 			dependency "io.mockk:mockk:1.12.0"
 
-			dependency("net.sourceforge.htmlunit:htmlunit:2.54.0") {
+			dependency("net.sourceforge.htmlunit:htmlunit:2.55.0") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
-			dependency("org.seleniumhq.selenium:htmlunit-driver:2.54.0") {
+			dependency("org.seleniumhq.selenium:htmlunit-driver:2.55.0") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
 			dependency("org.seleniumhq.selenium:selenium-java:3.141.59") {
@@ -302,7 +302,7 @@ configure([rootProject] + javaProjects) { project ->
 	}
 
 	checkstyle {
-		toolVersion = "9.0"
+		toolVersion = "9.2"
 		configDirectory.set(rootProject.file("src/checkstyle"))
 	}
 

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

@@ -214,6 +214,7 @@ public interface BeanFactory {
 	/**
 	 * Return a provider for the specified bean, allowing for lazy on-demand retrieval
 	 * of instances, including availability and uniqueness options.
+	 * <p>For matching a generic type, consider {@link #getBeanProvider(ResolvableType)}.
 	 * @param requiredType type the bean must match; can be an interface or superclass
 	 * @return a corresponding provider handle
 	 * @since 5.1
@@ -223,13 +224,20 @@ public interface BeanFactory {
 
 	/**
 	 * Return a provider for the specified bean, allowing for lazy on-demand retrieval
-	 * of instances, including availability and uniqueness options.
-	 * @param requiredType type the bean must match; can be a generic type declaration.
-	 * Note that collection types are not supported here, in contrast to reflective
+	 * of instances, including availability and uniqueness options. This variant allows
+	 * for specifying a generic type to match, similar to reflective injection points
+	 * with generic type declarations in method/constructor parameters.
+	 * <p>Note that collections of beans are not supported here, in contrast to reflective
 	 * injection points. For programmatically retrieving a list of beans matching a
 	 * specific type, specify the actual bean type as an argument here and subsequently
 	 * use {@link ObjectProvider#orderedStream()} or its lazy streaming/iteration options.
+	 * <p>Also, generics matching is strict here, as per the Java assignment rules.
+	 * For lenient fallback matching with unchecked semantics (similar to the ´unchecked´
+	 * Java compiler warning), consider calling {@link #getBeanProvider(Class)} with the
+	 * raw type as a second step if no full generic match is
+	 * {@link ObjectProvider#getIfAvailable() available} with this variant.
 	 * @return a corresponding provider handle
+	 * @param requiredType type the bean must match; can be a generic type declaration
 	 * @since 5.1
 	 * @see ObjectProvider#iterator()
 	 * @see ObjectProvider#stream()

spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/AbstractFallbackJCacheOperationSource.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.
@@ -79,7 +79,7 @@ public abstract class AbstractFallbackJCacheOperationSource implements JCacheOpe
 
 	@Nullable
 	private JCacheOperation<?> computeCacheOperation(Method method, @Nullable Class<?> targetClass) {
-		// Don't allow no-public methods as required.
+		// Don't allow non-public methods, as configured.
 		if (allowPublicMethodsOnly() && !Modifier.isPublic(method.getModifiers())) {
 			return null;
 		}

spring-context/src/main/java/org/springframework/cache/interceptor/AbstractFallbackCacheOperationSource.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.
@@ -124,7 +124,7 @@ public abstract class AbstractFallbackCacheOperationSource implements CacheOpera
 
 	@Nullable
 	private Collection<CacheOperation> computeCacheOperations(Method method, @Nullable Class<?> targetClass) {
-		// Don't allow no-public methods as required.
+		// Don't allow non-public methods, as configured.
 		if (allowPublicMethodsOnly() && !Modifier.isPublic(method.getModifiers())) {
 			return null;
 		}

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

@@ -26,9 +26,7 @@ import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 
-import org.springframework.beans.factory.DisposableBean;
 import org.springframework.beans.factory.FactoryBean;
-import org.springframework.beans.factory.InitializingBean;
 import org.springframework.lang.Nullable;
 
 /**
@@ -65,7 +63,7 @@ import org.springframework.lang.Nullable;
  */
 @SuppressWarnings("serial")
 public class ThreadPoolExecutorFactoryBean extends ExecutorConfigurationSupport
-		implements FactoryBean<ExecutorService>, InitializingBean, DisposableBean {
+		implements FactoryBean<ExecutorService> {
 
 	private int corePoolSize = 1;
 

spring-core/src/main/java/org/springframework/asm/ClassReader.java

@@ -194,7 +194,7 @@ public class ClassReader {
     this.b = classFileBuffer;
     // Check the class' major_version. This field is after the magic and minor_version fields, which
     // use 4 and 2 bytes respectively.
-    if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V18) {
+    if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V19) {
       throw new IllegalArgumentException(
           "Unsupported class file major version " + readShort(classFileOffset + 6));
     }

spring-core/src/main/java/org/springframework/asm/Opcodes.java

@@ -283,6 +283,7 @@ public interface Opcodes {
   int V16 = 0 << 16 | 60;
   int V17 = 0 << 16 | 61;
   int V18 = 0 << 16 | 62;
+  int V19 = 0 << 16 | 63;
 
   /**
    * Version flag indicating that the class is using 'preview' features.

spring-test/src/main/java/org/springframework/test/web/client/match/ContentRequestMatchers.java

@@ -197,7 +197,7 @@ public class ContentRequestMatchers {
 	 * <li>{@link Resource} - content from a file
 	 * <li>{@code byte[]} - other raw content
 	 * </ul>
-	 * <p><strong>Note:</strong> This method uses the Apache Commons File Upload
+	 * <p><strong>Note:</strong> This method uses the Apache Commons FileUpload
 	 * library to parse the multipart data and it must be on the test classpath.
 	 * @param expectedMap the expected multipart values
 	 * @since 5.3

spring-tx/src/main/java/org/springframework/transaction/interceptor/AbstractFallbackTransactionAttributeSource.java

@@ -162,7 +162,7 @@ public abstract class AbstractFallbackTransactionAttributeSource
 	 */
 	@Nullable
 	protected TransactionAttribute computeTransactionAttribute(Method method, @Nullable Class<?> targetClass) {
-		// Don't allow no-public methods as required.
+		// Don't allow non-public methods, as configured.
 		if (allowPublicMethodsOnly() && !Modifier.isPublic(method.getModifiers())) {
 			return null;
 		}

spring-webflux/src/main/java/org/springframework/web/reactive/socket/server/upgrade/TomcatRequestUpgradeStrategy.java

@@ -122,6 +122,7 @@ public class TomcatRequestUpgradeStrategy implements RequestUpgradeStrategy {
 	}
 
 
+	@SuppressWarnings("deprecation")  // for old doUpgrade variant in Tomcat 9.0.55
 	@Override
 	public Mono<Void> upgrade(ServerWebExchange exchange, WebSocketHandler handler,
 			@Nullable String subProtocol, Supplier<HandshakeInfo> handshakeInfoFactory){

spring-websocket/src/main/java/org/springframework/web/socket/server/standard/TomcatRequestUpgradeStrategy.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.
@@ -52,6 +52,7 @@ public class TomcatRequestUpgradeStrategy extends AbstractStandardUpgradeStrateg
 		return new String[] {"13"};
 	}
 
+	@SuppressWarnings("deprecation")  // for old doUpgrade variant in Tomcat 9.0.55
 	@Override
 	public void upgradeInternal(ServerHttpRequest request, ServerHttpResponse response,
 			@Nullable String selectedProtocol, List<Extension> selectedExtensions, Endpoint endpoint)