Clarified getAllAnnotationAttributes behavior

Issue: SPR-12473
(cherry picked from commit 5ac8680)

Author: jhoeller

spring-core/src/main/java/org/springframework/core/type/AnnotatedTypeMetadata.java

@@ -38,8 +38,8 @@
 public interface AnnotatedTypeMetadata {
 
 	/**
-	 * Determine whether the underlying type has an annotation or
-	 * meta-annotation of the given type defined.
+	 * Determine whether the underlying element has an annotation or meta-annotation
+	 * of the given type defined.
 	 * <p>If this method returns {@code true}, then
 	 * {@link #getAnnotationAttributes} will return a non-null Map.
 	 * @param annotationType the annotation type to look for
@@ -48,9 +48,9 @@ public interface AnnotatedTypeMetadata {
 	boolean isAnnotated(String annotationType);
 
 	/**
-	 * Retrieve the attributes of the annotation of the given type,
-	 * if any (i.e. if defined on the underlying class, as direct
-	 * annotation or as meta-annotation).
+	 * Retrieve the attributes of the annotation of the given type, if any (i.e. if
+	 * defined on the underlying element, as direct annotation or meta-annotation),
+	 * also taking attribute overrides on composed annotations into account.
 	 * @param annotationType the annotation type to look for
 	 * @return a Map of attributes, with the attribute name as key (e.g. "value")
 	 * and the defined attribute value as Map value. This return value will be
@@ -59,9 +59,9 @@ public interface AnnotatedTypeMetadata {
 	Map<String, Object> getAnnotationAttributes(String annotationType);
 
 	/**
-	 * Retrieve the attributes of the annotation of the given type,
-	 * if any (i.e. if defined on the underlying class, as direct
-	 * annotation or as meta-annotation).
+	 * Retrieve the attributes of the annotation of the given type, if any (i.e. if
+	 * defined on the underlying element, as direct annotation or meta-annotation),
+	 * also taking attribute overrides on composed annotations into account.
 	 * @param annotationType the annotation type to look for
 	 * @param classValuesAsString whether to convert class references to String
 	 * class names for exposure as values in the returned Map, instead of Class
@@ -74,8 +74,8 @@ public interface AnnotatedTypeMetadata {
 
 	/**
 	 * Retrieve all attributes of all annotations of the given type, if any (i.e. if
-	 * defined on the underlying type ({@link AnnotationMetadata class} or
-	 * {@link MethodMetadata method}), as direct annotation or as meta-annotation).
+	 * defined on the underlying element, as direct annotation or meta-annotation).
+	 * Note that this variant does <i>not</i> take attribute overrides into account.
 	 * @param annotationType the annotation type to look for
 	 * @return a MultiMap of attributes, with the attribute name as key (e.g. "value")
 	 * and a list of the defined attribute values as Map value. This return value will
@@ -86,8 +86,8 @@ public interface AnnotatedTypeMetadata {
 
 	/**
 	 * Retrieve all attributes of all annotations of the given type, if any (i.e. if
-	 * defined on the underlying type ({@link AnnotationMetadata class} or
-	 * {@link MethodMetadata method}), as direct annotation or as meta-annotation).
+	 * defined on the underlying element, as direct annotation or meta-annotation).
+	 * Note that this variant does <i>not</i> take attribute overrides into account.
 	 * @param annotationType the annotation type to look for
 	 * @param classValuesAsString  whether to convert class references to String
 	 * @return a MultiMap of attributes, with the attribute name as key (e.g. "value")

spring-core/src/test/java/org/springframework/core/type/AnnotationMetadataTests.java

@@ -244,6 +244,7 @@ public void composedAnnotationWithMetaAnnotationsWithIdenticalAttributeNamesUsin
 		assertMultipleAnnotationsWithIdenticalAttributeNames(metadata);
 	}
 
+
 	private void assertMultipleAnnotationsWithIdenticalAttributeNames(AnnotationMetadata metadata) {
 		AnnotationAttributes attributes1 = (AnnotationAttributes) metadata.getAnnotationAttributes(
 				NamedAnnotation1.class.getName(), false);
@@ -292,6 +293,8 @@ private void doTestAnnotationInfo(AnnotationMetadata metadata) {
 		assertEquals("direct", method.getAnnotationAttributes(DirectAnnotation.class.getName()).get("value"));
 		List<Object> allMeta = method.getAllAnnotationAttributes(DirectAnnotation.class.getName()).get("value");
 		assertThat(new HashSet<Object>(allMeta), is(equalTo(new HashSet<Object>(Arrays.asList("direct", "meta")))));
+		allMeta = method.getAllAnnotationAttributes(DirectAnnotation.class.getName()).get("additional");
+		assertThat(new HashSet<Object>(allMeta), is(equalTo(new HashSet<Object>(Arrays.asList("direct")))));
 
 		assertTrue(metadata.isAnnotated(IsAnnotatedAnnotation.class.getName()));
 
@@ -332,6 +335,8 @@ private void doTestAnnotationInfo(AnnotationMetadata metadata) {
 			assertEquals("direct", metadata.getAnnotationAttributes(DirectAnnotation.class.getName()).get("value"));
 			allMeta = metadata.getAllAnnotationAttributes(DirectAnnotation.class.getName()).get("value");
 			assertThat(new HashSet<Object>(allMeta), is(equalTo(new HashSet<Object>(Arrays.asList("direct", "meta")))));
+			allMeta = metadata.getAllAnnotationAttributes(DirectAnnotation.class.getName()).get("additional");
+			assertThat(new HashSet<Object>(allMeta), is(equalTo(new HashSet<Object>(Arrays.asList("direct")))));
 		}
 		{ // perform tests with classValuesAsString = true
 			AnnotationAttributes specialAttrs = (AnnotationAttributes) metadata.getAnnotationAttributes(
@@ -407,14 +412,16 @@ public static enum SomeEnum {
 		NestedAnno[] optionalArray() default { @NestedAnno(value = "optional", anEnum = SomeEnum.DEFAULT, classArray = Void.class) };
 	}
 
-	@Target({ ElementType.TYPE, ElementType.METHOD })
+	@Target({ElementType.TYPE, ElementType.METHOD})
 	@Retention(RetentionPolicy.RUNTIME)
 	public @interface DirectAnnotation {
 
 		String value();
+
+		String additional() default "direct";
 	}
 
-	@Target({ ElementType.TYPE })
+	@Target(ElementType.TYPE)
 	@Retention(RetentionPolicy.RUNTIME)
 	public @interface IsAnnotatedAnnotation {
 	}
@@ -424,9 +431,11 @@ public static enum SomeEnum {
 	@DirectAnnotation("meta")
 	@IsAnnotatedAnnotation
 	public @interface MetaAnnotation {
+
+		String additional() default "meta";
 	}
 
-	@Target({ ElementType.TYPE, ElementType.METHOD })
+	@Target({ElementType.TYPE, ElementType.METHOD})
 	@Retention(RetentionPolicy.RUNTIME)
 	@MetaAnnotation
 	public @interface MetaMetaAnnotation {
@@ -446,17 +455,18 @@ public static enum SubclassEnum {
 		},
 		BAR {
 		/* Do not delete! This subclassing is intentional. */
-		};
+		}
 	}
 
 	@Component("myName")
 	@Scope("myScope")
-	@SpecialAttr(clazz = String.class, state = Thread.State.NEW, nestedAnno = @NestedAnno(value = "na", anEnum = SomeEnum.LABEL1, classArray = { String.class }), nestedAnnoArray = {
-		@NestedAnno, @NestedAnno(value = "na1", anEnum = SomeEnum.LABEL2, classArray = { Number.class }) })
-	@SuppressWarnings({ "serial", "unused" })
+	@SpecialAttr(clazz = String.class, state = Thread.State.NEW,
+			nestedAnno = @NestedAnno(value = "na", anEnum = SomeEnum.LABEL1, classArray = {String.class}),
+			nestedAnnoArray = {@NestedAnno, @NestedAnno(value = "na1", anEnum = SomeEnum.LABEL2, classArray = {Number.class})})
+	@SuppressWarnings({"serial", "unused"})
 	@DirectAnnotation("direct")
 	@MetaMetaAnnotation
-	@EnumSubclasses({ SubclassEnum.FOO, SubclassEnum.BAR })
+	@EnumSubclasses({SubclassEnum.FOO, SubclassEnum.BAR})
 	private static class AnnotatedComponent implements Serializable {
 
 		@TestAutowired