Fixes spring-projectsgh-24375

spring-context/src/test/java/example/gh24375/MyComponent.java → spring-context/src/test/java/example/gh24375/AnnotatedComponent.java

@@ -19,6 +19,6 @@
 import org.springframework.stereotype.Component;
 
 @Component
-@A(other = @B)
-public class MyComponent {
+@EnclosingAnnotation(nested2 = @NestedAnnotation)
+public class AnnotatedComponent {
 }

spring-context/src/test/java/example/gh24375/A.java → spring-context/src/test/java/example/gh24375/EnclosingAnnotation.java

@@ -25,11 +25,12 @@
 
 @Target(ElementType.TYPE)
 @Retention(RetentionPolicy.RUNTIME)
-public @interface A {
+public @interface EnclosingAnnotation {
 
-	@AliasFor("value")
-	B other() default @B;
+	@AliasFor("nested2")
+	NestedAnnotation nested1() default @NestedAnnotation;
+
+	@AliasFor("nested1")
+	NestedAnnotation nested2() default @NestedAnnotation;
 
-	@AliasFor("other")
-	B value() default @B;
 }

spring-context/src/test/java/example/gh24375/B.java → spring-context/src/test/java/example/gh24375/NestedAnnotation.java

@@ -23,7 +23,8 @@
 
 @Target(ElementType.ANNOTATION_TYPE)
 @Retention(RetentionPolicy.RUNTIME)
-public @interface B {
+public @interface NestedAnnotation {
 
 	String name() default "";
+
 }

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

@@ -21,7 +21,7 @@
 import java.util.Set;
 import java.util.regex.Pattern;
 
-import example.gh24375.MyComponent;
+import example.gh24375.AnnotatedComponent;
 import example.profilescan.DevComponent;
 import example.profilescan.ProfileAnnotatedComponent;
 import example.profilescan.ProfileMetaAnnotatedComponent;
@@ -39,7 +39,6 @@
 import example.scannable.StubFooDao;
 import example.scannable.sub.BarComponent;
 import org.aspectj.lang.annotation.Aspect;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.factory.annotation.AnnotatedGenericBeanDefinition;
@@ -503,12 +502,11 @@ public void testIntegrationWithAnnotationConfigApplicationContext_metaProfile()
 	}
 
 	@Test
-	@Disabled("Disabled until gh-24375 is resolved")
 	public void gh24375() {
 		ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(true);
-		Set<BeanDefinition> components = provider.findCandidateComponents(MyComponent.class.getPackage().getName());
+		Set<BeanDefinition> components = provider.findCandidateComponents(AnnotatedComponent.class.getPackage().getName());
 		assertThat(components).hasSize(1);
-		assertThat(components.iterator().next().getBeanClassName()).isEqualTo(MyComponent.class.getName());
+		assertThat(components.iterator().next().getBeanClassName()).isEqualTo(AnnotatedComponent.class.getName());
 	}
 
 

spring-core/src/main/java/org/springframework/core/annotation/AnnotationTypeMapping.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.
@@ -534,8 +534,15 @@ private static boolean areEquivalent(Annotation annotation, @Nullable Object ext
 		AttributeMethods attributes = AttributeMethods.forAnnotationType(annotation.annotationType());
 		for (int i = 0; i < attributes.size(); i++) {
 			Method attribute = attributes.get(i);
-			if (!areEquivalent(ReflectionUtils.invokeMethod(attribute, annotation),
-					valueExtractor.apply(attribute, extractedValue), valueExtractor)) {
+			Object value1 = ReflectionUtils.invokeMethod(attribute, annotation);
+			Object value2;
+			if (extractedValue instanceof TypeMappedAnnotation) {
+				value2 = ((TypeMappedAnnotation<?>) extractedValue).getValue(attribute.getName()).orElse(null);
+			}
+			else {
+				value2 = valueExtractor.apply(attribute, extractedValue);
+			}
+			if (!areEquivalent(value1, value2, valueExtractor)) {
 				return false;
 			}
 		}

spring-core/src/test/java/example/type/AnnotatedComponent.java

@@ -0,0 +1,21 @@
+/*
+ * 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.
+ * 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 example.type;
+
+@EnclosingAnnotation(nested2 = @NestedAnnotation)
+public class AnnotatedComponent {
+}

spring-core/src/test/java/example/type/EnclosingAnnotation.java

@@ -0,0 +1,33 @@
+/*
+ * 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.
+ * 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 example.type;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import org.springframework.core.annotation.AliasFor;
+
+@Retention(RetentionPolicy.RUNTIME)
+public @interface EnclosingAnnotation {
+
+	@AliasFor("nested2")
+	NestedAnnotation nested1() default @NestedAnnotation;
+
+	@AliasFor("nested1")
+	NestedAnnotation nested2() default @NestedAnnotation;
+
+}

spring-core/src/test/java/example/type/NestedAnnotation.java

@@ -0,0 +1,29 @@
+/*
+ * 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.
+ * 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 example.type;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.ANNOTATION_TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface NestedAnnotation {
+
+	String name() default "";
+}

spring-core/src/test/java/org/springframework/core/type/AbstractMethodMetadataTests.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.
@@ -19,6 +19,8 @@
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
+import example.type.AnnotatedComponent;
+import example.type.EnclosingAnnotation;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.core.annotation.MergedAnnotation;
@@ -31,6 +33,7 @@
  * Base class for {@link MethodMetadata} tests.
  *
  * @author Phillip Webb
+ * @author Sam Brannen
  */
 public abstract class AbstractMethodMetadataTests {
 
@@ -138,6 +141,12 @@ public void getAllAnnotationAttributesReturnsAllAttributes() {
 		assertThat(attributes.get("size")).containsExactlyInAnyOrder(1, 2);
 	}
 
+	@Test // gh-24375
+	public void metadataLoadsForNestedAnnotations() {
+		AnnotationMetadata annotationMetadata = get(AnnotatedComponent.class);
+		assertThat(annotationMetadata.getAnnotationTypes()).containsExactly(EnclosingAnnotation.class.getName());
+	}
+
 	protected MethodMetadata getTagged(Class<?> source) {
 		return get(source, Tag.class.getName());
 	}