Merge branch '5.1.x'

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

 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -184,6 +184,20 @@ public class ConfigurationClassPostProcessorTests {
 		assertSupportForComposedAnnotationWithExclude(beanDefinition);
 	}
 
+	@Test
+	public void postProcessorWorksWithExtendedConfigurationWithAttributeOverrideForExcludesFilterUsingReflection() {
+		RootBeanDefinition beanDefinition = new RootBeanDefinition(
+				ExtendedConfigurationWithAttributeOverrideForExcludeFilter.class);
+		assertSupportForComposedAnnotationWithExclude(beanDefinition);
+	}
+
+	@Test
+	public void postProcessorWorksWithExtendedConfigurationWithAttributeOverrideForExcludesFilterUsingAsm() {
+		RootBeanDefinition beanDefinition = new RootBeanDefinition(
+				ExtendedConfigurationWithAttributeOverrideForExcludeFilter.class.getName());
+		assertSupportForComposedAnnotationWithExclude(beanDefinition);
+	}
+
 	@Test
 	public void postProcessorWorksWithComposedComposedConfigurationWithAttributeOverridesUsingReflection() {
 		RootBeanDefinition beanDefinition = new RootBeanDefinition(
@@ -1515,6 +1529,15 @@ public class ConfigurationClassPostProcessorTests {
 	public static class ComposedConfigurationWithAttributeOverrideForExcludeFilter {
 	}
 
+	@ComponentScan(basePackages = "org.springframework.context.annotation.componentscan.base", excludeFilters = {})
+	public static class BaseConfigurationWithEmptyExcludeFilters {
+	}
+
+	@ComponentScan(basePackages = "org.springframework.context.annotation.componentscan.simple",
+			excludeFilters = @ComponentScan.Filter(Component.class))
+	public static class ExtendedConfigurationWithAttributeOverrideForExcludeFilter extends BaseConfigurationWithEmptyExcludeFilters {
+	}
+
 	@ComposedConfigurationWithAttributeOverrides
 	@Retention(RetentionPolicy.RUNTIME)
 	@Target(ElementType.TYPE)

spring-core/src/main/java/org/springframework/core/annotation/AnnotationAttributes.java

 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -363,7 +363,7 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	private void assertAttributeType(String attributeName, Object attributeValue, Class<?> expectedType) {
 		if (!expectedType.isInstance(attributeValue)) {
 			throw new IllegalArgumentException(String.format(
-					"Attribute '%s' is of type [%s], but [%s] was expected in attributes for annotation [%s]",
+					"Attribute '%s' is of type %s, but %s was expected in attributes for annotation [%s]",
 					attributeName, attributeValue.getClass().getSimpleName(), expectedType.getSimpleName(),
 					this.displayName));
 		}

spring-core/src/main/java/org/springframework/core/type/classreading/AnnotationReadingVisitorUtils.java

 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 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 org.springframework.core.annotation.AnnotationAttributes;
 import org.springframework.core.annotation.AnnotationUtils;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ClassUtils;
+import org.springframework.util.CollectionUtils;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.ObjectUtils;
 
@@ -124,7 +125,7 @@ abstract class AnnotationReadingVisitorUtils {
 
 		// Get the unmerged list of attributes for the target annotation.
 		List<AnnotationAttributes> attributesList = attributesMap.get(annotationName);
-		if (attributesList == null || attributesList.isEmpty()) {
+		if (CollectionUtils.isEmpty(attributesList)) {
 			return null;
 		}
 

spring-core/src/main/java/org/springframework/core/type/classreading/RecursiveAnnotationArrayVisitor.java

 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -89,7 +89,11 @@ class RecursiveAnnotationArrayVisitor extends AbstractRecursiveAnnotationVisitor
 				try {
 					Class<?> attributeType = annotationType.getMethod(this.attributeName).getReturnType();
 					if (attributeType.isArray()) {
-						this.attributes.put(this.attributeName, Array.newInstance(attributeType.getComponentType(), 0));
+						Class<?> elementType = attributeType.getComponentType();
+						if (elementType.isAnnotation()) {
+							elementType = AnnotationAttributes.class;
+						}
+						this.attributes.put(this.attributeName, Array.newInstance(elementType, 0));
 					}
 				}
 				catch (NoSuchMethodException ex) {

spring-core/src/test/java/org/springframework/core/annotation/AnnotationAttributesTests.java

 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -154,7 +154,7 @@ public class AnnotationAttributesTests {
 	public void getEnumWithTypeMismatch() {
 		attributes.put("color", "RED");
 		exception.expect(IllegalArgumentException.class);
-		exception.expectMessage(containsString("Attribute 'color' is of type [String], but [Enum] was expected"));
+		exception.expectMessage(containsString("Attribute 'color' is of type String, but Enum was expected"));
 		attributes.getEnum("color");
 	}