Consistent behavior for overloaded @bean methods with ASM processing

Closes gh-25263

Author: jhoeller

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

@@ -211,7 +211,7 @@ private void loadBeanDefinitionsForBeanMethod(BeanMethod beanMethod) {
 			return;
 		}
 
-		ConfigurationClassBeanDefinition beanDef = new ConfigurationClassBeanDefinition(configClass, metadata);
+		ConfigurationClassBeanDefinition beanDef = new ConfigurationClassBeanDefinition(configClass, metadata, beanName);
 		beanDef.setSource(this.sourceExtractor.extractSource(metadata, configClass.getResource()));
 
 		if (metadata.isStatic()) {
@@ -276,7 +276,7 @@ private void loadBeanDefinitionsForBeanMethod(BeanMethod beanMethod) {
 					new BeanDefinitionHolder(beanDef, beanName), this.registry,
 					proxyMode == ScopedProxyMode.TARGET_CLASS);
 			beanDefToRegister = new ConfigurationClassBeanDefinition(
-					(RootBeanDefinition) proxyDef.getBeanDefinition(), configClass, metadata);
+					(RootBeanDefinition) proxyDef.getBeanDefinition(), configClass, metadata, beanName);
 		}
 
 		if (logger.isTraceEnabled()) {
@@ -398,24 +398,31 @@ private static class ConfigurationClassBeanDefinition extends RootBeanDefinition
 
 		private final MethodMetadata factoryMethodMetadata;
 
-		public ConfigurationClassBeanDefinition(ConfigurationClass configClass, MethodMetadata beanMethodMetadata) {
+		private final String derivedBeanName;
+
+		public ConfigurationClassBeanDefinition(
+				ConfigurationClass configClass, MethodMetadata beanMethodMetadata, String derivedBeanName) {
+
 			this.annotationMetadata = configClass.getMetadata();
 			this.factoryMethodMetadata = beanMethodMetadata;
+			this.derivedBeanName = derivedBeanName;
 			setResource(configClass.getResource());
 			setLenientConstructorResolution(false);
 		}
 
-		public ConfigurationClassBeanDefinition(
-				RootBeanDefinition original, ConfigurationClass configClass, MethodMetadata beanMethodMetadata) {
+		public ConfigurationClassBeanDefinition(RootBeanDefinition original,
+				ConfigurationClass configClass, MethodMetadata beanMethodMetadata, String derivedBeanName) {
 			super(original);
 			this.annotationMetadata = configClass.getMetadata();
 			this.factoryMethodMetadata = beanMethodMetadata;
+			this.derivedBeanName = derivedBeanName;
 		}
 
 		private ConfigurationClassBeanDefinition(ConfigurationClassBeanDefinition original) {
 			super(original);
 			this.annotationMetadata = original.annotationMetadata;
 			this.factoryMethodMetadata = original.factoryMethodMetadata;
+			this.derivedBeanName = original.derivedBeanName;
 		}
 
 		@Override
@@ -431,7 +438,8 @@ public MethodMetadata getFactoryMethodMetadata() {
 
 		@Override
 		public boolean isFactoryMethod(Method candidate) {
-			return (super.isFactoryMethod(candidate) && BeanAnnotationHelper.isBeanAnnotated(candidate));
+			return (super.isFactoryMethod(candidate) && BeanAnnotationHelper.isBeanAnnotated(candidate) &&
+					BeanAnnotationHelper.determineBeanNameFor(candidate).equals(this.derivedBeanName));
 		}
 
 		@Override

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -280,12 +280,32 @@ public void configurationWithApplicationListener() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
 		ctx.register(ConfigWithApplicationListener.class);
 		ctx.refresh();
+
 		ConfigWithApplicationListener config = ctx.getBean(ConfigWithApplicationListener.class);
 		assertThat(config.closed).isFalse();
 		ctx.close();
 		assertThat(config.closed).isTrue();
 	}
 
+	@Test
+	public void configurationWithOverloadedBeanMismatch() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+		ctx.registerBeanDefinition("config", new RootBeanDefinition(OverloadedBeanMismatch.class));
+		ctx.refresh();
+
+		TestBean tb = ctx.getBean(TestBean.class);
+		assertThat(tb.getLawyer()).isEqualTo(ctx.getBean(NestedTestBean.class));
+	}
+
+	@Test
+	public void configurationWithOverloadedBeanMismatchWithAsm() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+		ctx.registerBeanDefinition("config", new RootBeanDefinition(OverloadedBeanMismatch.class.getName()));
+		ctx.refresh();
+
+		TestBean tb = ctx.getBean(TestBean.class);
+		assertThat(tb.getLawyer()).isEqualTo(ctx.getBean(NestedTestBean.class));
+	}
 
 
 	/**
@@ -595,4 +615,21 @@ public ApplicationListener<ContextClosedEvent> listener() {
 		}
 	}
 
+
+	@Configuration
+	public static class OverloadedBeanMismatch {
+
+		@Bean(name = "other")
+		public NestedTestBean foo() {
+			return new NestedTestBean();
+		}
+
+		@Bean(name = "foo")
+		public TestBean foo(@Qualifier("other") NestedTestBean other) {
+			TestBean tb = new TestBean();
+			tb.setLawyer(other);
+			return tb;
+		}
+	}
+
 }