/*
 * 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.
 * 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 org.springframework.core.annotation;

import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import javax.annotation.Resource;

import org.junit.jupiter.api.Test;

import org.springframework.core.Ordered;
import org.springframework.core.annotation.MergedAnnotation.Adapt;
import org.springframework.core.annotation.MergedAnnotations.SearchStrategy;
import org.springframework.core.annotation.subpackage.NonPublicAnnotatedClass;
import org.springframework.lang.Nullable;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Indexed;
import org.springframework.util.ClassUtils;
import org.springframework.util.MultiValueMap;
import org.springframework.util.ReflectionUtils;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
import static org.assertj.core.api.Assertions.entry;

/**
 * Tests for {@link MergedAnnotations} and {@link MergedAnnotation}. These tests
 * cover common usage scenarios and were mainly ported from the original
 * {@code AnnotationUtils} and {@code AnnotatedElementUtils} tests.
 *
 * @author Phillip Webb
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @author Sam Brannen
 * @author Chris Beams
 * @author Oleg Zhurakousky
 * @author Rossen Stoyanchev
 * @see MergedAnnotationsRepeatableAnnotationTests
 * @see MergedAnnotationClassLoaderTests
 */
class MergedAnnotationsTests {

	@Test
	void streamWhenFromNonAnnotatedClass() {
		assertThat(MergedAnnotations.from(NonAnnotatedClass.class).
				stream(TransactionalComponent.class)).isEmpty();
	}

	@Test
	void streamWhenFromClassWithMetaDepth1() {
		Stream<Class<?>> classes = MergedAnnotations.from(TransactionalComponent.class)
				.stream().map(MergedAnnotation::getType);
		assertThat(classes).containsExactly(Transactional.class, Component.class, Indexed.class);
	}

	@Test
	void streamWhenFromClassWithMetaDepth2() {
		Stream<Class<?>> classes = MergedAnnotations.from(ComposedTransactionalComponent.class)
				.stream().map(MergedAnnotation::getType);
		assertThat(classes).containsExactly(TransactionalComponent.class,
				Transactional.class, Component.class, Indexed.class);
	}

	@Test
	void isPresentWhenFromNonAnnotatedClass() {
		assertThat(MergedAnnotations.from(NonAnnotatedClass.class).
				isPresent(Transactional.class)).isFalse();
	}

	@Test
	void isPresentWhenFromAnnotationClassWithMetaDepth0() {
		assertThat(MergedAnnotations.from(TransactionalComponent.class).
				isPresent(TransactionalComponent.class)).isFalse();
	}

	@Test
	void isPresentWhenFromAnnotationClassWithMetaDepth1() {
		MergedAnnotations annotations = MergedAnnotations.from(TransactionalComponent.class);
		assertThat(annotations.isPresent(Transactional.class)).isTrue();
		assertThat(annotations.isPresent(Component.class)).isTrue();
	}

	@Test
	void isPresentWhenFromAnnotationClassWithMetaDepth2() {
		MergedAnnotations annotations = MergedAnnotations.from(
				ComposedTransactionalComponent.class);
		assertThat(annotations.isPresent(Transactional.class)).isTrue();
		assertThat(annotations.isPresent(Component.class)).isTrue();
		assertThat(annotations.isPresent(ComposedTransactionalComponent.class)).isFalse();
	}

	@Test
	void isPresentWhenFromClassWithMetaDepth0() {
		assertThat(MergedAnnotations.from(TransactionalComponentClass.class).isPresent(
				TransactionalComponent.class)).isTrue();
	}

	@Test
	void isPresentWhenFromSubclassWithMetaDepth0() {
		assertThat(MergedAnnotations.from(SubTransactionalComponentClass.class).isPresent(
				TransactionalComponent.class)).isFalse();
	}

	@Test
	void isPresentWhenFromClassWithMetaDepth1() {
		MergedAnnotations annotations = MergedAnnotations.from(
				TransactionalComponentClass.class);
		assertThat(annotations.isPresent(Transactional.class)).isTrue();
		assertThat(annotations.isPresent(Component.class)).isTrue();
	}

	@Test
	void isPresentWhenFromClassWithMetaDepth2() {
		MergedAnnotations annotations = MergedAnnotations.from(
				ComposedTransactionalComponentClass.class);
		assertThat(annotations.isPresent(Transactional.class)).isTrue();
		assertThat(annotations.isPresent(Component.class)).isTrue();
		assertThat(annotations.isPresent(ComposedTransactionalComponent.class)).isTrue();
	}

	@Test
	void getParent() {
		MergedAnnotations annotations = MergedAnnotations.from(ComposedTransactionalComponentClass.class);
		assertThat(annotations.get(TransactionalComponent.class).getMetaSource().getType())
				.isEqualTo(ComposedTransactionalComponent.class);
	}

	@Test
	void getRootWhenNotDirect() {
		MergedAnnotations annotations = MergedAnnotations.from(ComposedTransactionalComponentClass.class);
		MergedAnnotation<?> annotation = annotations.get(TransactionalComponent.class);
		assertThat(annotation.getDistance()).isGreaterThan(0);
		assertThat(annotation.getRoot().getType()).isEqualTo(ComposedTransactionalComponent.class);
	}

	@Test
	void getRootWhenDirect() {
		MergedAnnotations annotations = MergedAnnotations.from(ComposedTransactionalComponentClass.class);
		MergedAnnotation<?> annotation = annotations.get(ComposedTransactionalComponent.class);
		assertThat(annotation.getDistance()).isEqualTo(0);
		assertThat(annotation.getRoot()).isSameAs(annotation);
	}

	@Test
	void getMetaTypes() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				ComposedTransactionalComponentClass.class).get(
						TransactionalComponent.class);
		assertThat(annotation.getMetaTypes()).containsExactly(
				ComposedTransactionalComponent.class, TransactionalComponent.class);
	}

	@Test
	void collectMultiValueMapFromNonAnnotatedClass() {
		MultiValueMap<String, Object> map = MergedAnnotations.from(
				NonAnnotatedClass.class).stream(Transactional.class).collect(
						MergedAnnotationCollectors.toMultiValueMap());
		assertThat(map).isEmpty();
	}

	@Test
	void collectMultiValueMapFromClassWithLocalAnnotation() {
		MultiValueMap<String, Object> map = MergedAnnotations.from(TxConfig.class).stream(
				Transactional.class).collect(
						MergedAnnotationCollectors.toMultiValueMap());
		assertThat(map).contains(entry("value", Arrays.asList("TxConfig")));
	}

	@Test
	void collectMultiValueMapFromClassWithLocalComposedAnnotationAndInheritedAnnotation() {
		MultiValueMap<String, Object> map = MergedAnnotations.from(
				SubClassWithInheritedAnnotation.class,
				SearchStrategy.INHERITED_ANNOTATIONS).stream(Transactional.class).collect(
						MergedAnnotationCollectors.toMultiValueMap());
		assertThat(map).contains(
				entry("qualifier", Arrays.asList("composed2", "transactionManager")));
	}

	@Test
	void collectMultiValueMapFavorsInheritedAnnotationsOverMoreLocallyDeclaredComposedAnnotations() {
		MultiValueMap<String, Object> map = MergedAnnotations.from(
				SubSubClassWithInheritedAnnotation.class,
				SearchStrategy.INHERITED_ANNOTATIONS).stream(Transactional.class).collect(
						MergedAnnotationCollectors.toMultiValueMap());
		assertThat(map).contains(entry("qualifier", Arrays.asList("transactionManager")));
	}

	@Test
	void collectMultiValueMapFavorsInheritedComposedAnnotationsOverMoreLocallyDeclaredComposedAnnotations() {
		MultiValueMap<String, Object> map = MergedAnnotations.from(
				SubSubClassWithInheritedComposedAnnotation.class,
				SearchStrategy.INHERITED_ANNOTATIONS).stream(Transactional.class).collect(
						MergedAnnotationCollectors.toMultiValueMap());
		assertThat(map).contains(entry("qualifier", Arrays.asList("composed1")));
	}

	/**
	 * If the "value" entry contains both "DerivedTxConfig" AND "TxConfig", then
	 * the algorithm is accidentally picking up shadowed annotations of the same
	 * type within the class hierarchy. Such undesirable behavior would cause
	 * the logic in
	 * {@code org.springframework.context.annotation.ProfileCondition} to fail.
	 */
	@Test
	void collectMultiValueMapFromClassWithLocalAnnotationThatShadowsAnnotationFromSuperclass() {
		MultiValueMap<String, Object> map = MergedAnnotations.from(DerivedTxConfig.class,
				SearchStrategy.INHERITED_ANNOTATIONS).stream(Transactional.class).collect(
						MergedAnnotationCollectors.toMultiValueMap());
		assertThat(map).contains(entry("value", Arrays.asList("DerivedTxConfig")));
	}

	/**
	 * Note: this functionality is required by
	 * {@code org.springframework.context.annotation.ProfileCondition}.
	 */
	@Test
	void collectMultiValueMapFromClassWithMultipleComposedAnnotations() {
		MultiValueMap<String, Object> map = MergedAnnotations.from(
				TxFromMultipleComposedAnnotations.class,
				SearchStrategy.INHERITED_ANNOTATIONS).stream(Transactional.class).collect(
						MergedAnnotationCollectors.toMultiValueMap());
		assertThat(map).contains(
				entry("value", Arrays.asList("TxInheritedComposed", "TxComposed")));
	}

	@Test
	void getWithInheritedAnnotationsFromClassWithLocalAnnotation() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(TxConfig.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(Transactional.class);
		assertThat(annotation.getString("value")).isEqualTo("TxConfig");
	}

	@Test
	void getWithInheritedAnnotationsFromClassWithLocalAnnotationThatShadowsAnnotationFromSuperclass() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(DerivedTxConfig.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(Transactional.class);
		assertThat(annotation.getString("value")).isEqualTo("DerivedTxConfig");
	}

	@Test
	void getWithInheritedAnnotationsFromMetaCycleAnnotatedClassWithMissingTargetMetaAnnotation() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				MetaCycleAnnotatedClass.class, SearchStrategy.INHERITED_ANNOTATIONS).get(Transactional.class);
		assertThat(annotation.isPresent()).isFalse();
	}

	@Test
	void getWithInheritedAnnotationsFavorsLocalComposedAnnotationOverInheritedAnnotation() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubClassWithInheritedAnnotation.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(Transactional.class);
		assertThat(annotation.getBoolean("readOnly")).isTrue();
	}

	@Test
	void getWithInheritedAnnotationsFavorsInheritedAnnotationsOverMoreLocallyDeclaredComposedAnnotations() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubSubClassWithInheritedAnnotation.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(Transactional.class);
		assertThat(annotation.getBoolean("readOnly")).isFalse();
	}

	@Test
	void getWithInheritedAnnotationsFavorsInheritedComposedAnnotationsOverMoreLocallyDeclaredComposedAnnotations() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubSubClassWithInheritedComposedAnnotation.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(Transactional.class);
		assertThat(annotation.getBoolean("readOnly")).isFalse();
	}

	@Test
	void getWithInheritedAnnotationsFromInterfaceImplementedBySuperclass() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				ConcreteClassWithInheritedAnnotation.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(Transactional.class);
		assertThat(annotation.isPresent()).isFalse();
	}

	@Test
	void getWithInheritedAnnotationsFromInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				InheritedAnnotationInterface.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(Transactional.class);
		assertThat(annotation.isPresent()).isTrue();
	}

	@Test
	void getWithInheritedAnnotationsFromNonInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				NonInheritedAnnotationInterface.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(Order.class);
		assertThat(annotation.isPresent()).isTrue();
	}

	@Test
	void getWithInheritedAnnotationsAttributesWithConventionBasedComposedAnnotation() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				ConventionBasedComposedContextConfigurationClass.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(ContextConfiguration.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getStringArray("locations")).containsExactly(
				"explicitDeclaration");
		assertThat(annotation.getStringArray("value")).containsExactly(
				"explicitDeclaration");
	}

	@Test
	void getWithInheritedAnnotationsFromHalfConventionBasedAndHalfAliasedComposedAnnotation1() {
		// SPR-13554: convention mapping mixed with AlaisFor annotations
		// xmlConfigFiles can be used because it has an AlaisFor annotation
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				HalfConventionBasedAndHalfAliasedComposedContextConfigurationClass1.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(ContextConfiguration.class);
		assertThat(annotation.getStringArray("locations")).containsExactly(
				"explicitDeclaration");
		assertThat(annotation.getStringArray("value")).containsExactly(
				"explicitDeclaration");
	}

	@Test
	void withInheritedAnnotationsFromHalfConventionBasedAndHalfAliasedComposedAnnotation2() {
		// SPR-13554: convention mapping mixed with AlaisFor annotations
		// locations doesn't apply because it has no AlaisFor annotation
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				HalfConventionBasedAndHalfAliasedComposedContextConfigurationClass2.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(ContextConfiguration.class);
		assertThat(annotation.getStringArray("locations")).isEmpty();
		assertThat(annotation.getStringArray("value")).isEmpty();
	}

	@Test
	void withInheritedAnnotationsFromAliasedComposedAnnotation() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				AliasedComposedContextConfigurationClass.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(ContextConfiguration.class);
		assertThat(annotation.getStringArray("value")).containsExactly("test.xml");
		assertThat(annotation.getStringArray("locations")).containsExactly("test.xml");
	}

	@Test
	void withInheritedAnnotationsFromAliasedValueComposedAnnotation() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				AliasedValueComposedContextConfigurationClass.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(ContextConfiguration.class);
		assertThat(annotation.getStringArray("value")).containsExactly("test.xml");
		assertThat(annotation.getStringArray("locations")).containsExactly("test.xml");
	}

	@Test
	void getWithInheritedAnnotationsFromImplicitAliasesInMetaAnnotationOnComposedAnnotation() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				ComposedImplicitAliasesContextConfigurationClass.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						ImplicitAliasesContextConfiguration.class);
		assertThat(annotation.getStringArray("groovyScripts")).containsExactly("A.xml",
				"B.xml");
		assertThat(annotation.getStringArray("xmlFiles")).containsExactly("A.xml",
				"B.xml");
		assertThat(annotation.getStringArray("locations")).containsExactly("A.xml",
				"B.xml");
		assertThat(annotation.getStringArray("value")).containsExactly("A.xml", "B.xml");
	}

	@Test
	void getWithInheritedAnnotationsFromAliasedValueComposedAnnotation() {
		testGetWithInherited(AliasedValueComposedContextConfigurationClass.class, "test.xml");
	}

	@Test
	void getWithInheritedAnnotationsFromImplicitAliasesForSameAttributeInComposedAnnotation() {
		testGetWithInherited(ImplicitAliasesContextConfigurationClass1.class, "foo.xml");
		testGetWithInherited(ImplicitAliasesContextConfigurationClass2.class, "bar.xml");
		testGetWithInherited(ImplicitAliasesContextConfigurationClass3.class, "baz.xml");
	}

	@Test
	void getWithInheritedAnnotationsFromTransitiveImplicitAliases() {
		testGetWithInherited(TransitiveImplicitAliasesContextConfigurationClass.class, "test.groovy");
	}

	@Test
	void getWithInheritedAnnotationsFromTransitiveImplicitAliasesWithSingleElementOverridingAnArrayViaAliasFor() {
		testGetWithInherited(
				SingleLocationTransitiveImplicitAliasesContextConfigurationClass.class, "test.groovy");
	}

	@Test
	void getWithInheritedAnnotationsFromTransitiveImplicitAliasesWithSkippedLevel() {
		testGetWithInherited(
				TransitiveImplicitAliasesWithSkippedLevelContextConfigurationClass.class, "test.xml");
	}

	@Test
	void getWithInheritedAnnotationsFromTransitiveImplicitAliasesWithSkippedLevelWithSingleElementOverridingAnArrayViaAliasFor() {
		testGetWithInherited(
				SingleLocationTransitiveImplicitAliasesWithSkippedLevelContextConfigurationClass.class, "test.xml");
	}

	private void testGetWithInherited(Class<?> element, String... expected) {
		MergedAnnotation<?> annotation = MergedAnnotations.from(element,
				SearchStrategy.INHERITED_ANNOTATIONS).get(ContextConfiguration.class);
		assertThat(annotation.getStringArray("locations")).isEqualTo(expected);
		assertThat(annotation.getStringArray("value")).isEqualTo(expected);
		assertThat(annotation.getClassArray("classes")).isEmpty();
	}

	@Test
	void getWithInheritedAnnotationsFromInvalidConventionBasedComposedAnnotation() {
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotations.from(InvalidConventionBasedComposedContextConfigurationClass.class,
						SearchStrategy.INHERITED_ANNOTATIONS).get(ContextConfiguration.class));
	}

	@Test
	void getWithInheritedAnnotationsFromShadowedAliasComposedAnnotation() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				ShadowedAliasComposedContextConfigurationClass.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(ContextConfiguration.class);
		assertThat(annotation.getStringArray("locations")).containsExactly("test.xml");
		assertThat(annotation.getStringArray("value")).containsExactly("test.xml");
	}

	@Test
	void getWithTypeHierarchyFromInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				InheritedAnnotationInterface.class, SearchStrategy.TYPE_HIERARCHY).get(Transactional.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getAggregateIndex()).isEqualTo(0);
	}

	@Test
	void getWithTypeHierarchyFromSubInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubInheritedAnnotationInterface.class, SearchStrategy.TYPE_HIERARCHY).get(Transactional.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getAggregateIndex()).isEqualTo(1);
	}

	@Test
	void getWithTypeHierarchyFromSubSubInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubSubInheritedAnnotationInterface.class, SearchStrategy.TYPE_HIERARCHY).get(Transactional.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getAggregateIndex()).isEqualTo(2);
	}

	@Test
	void getWithTypeHierarchyFromNonInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				NonInheritedAnnotationInterface.class, SearchStrategy.TYPE_HIERARCHY).get(Order.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getAggregateIndex()).isEqualTo(0);
	}

	@Test
	void getWithTypeHierarchyFromSubNonInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubNonInheritedAnnotationInterface.class, SearchStrategy.TYPE_HIERARCHY).get(Order.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getAggregateIndex()).isEqualTo(1);
	}

	@Test
	void getWithTypeHierarchyFromSubSubNonInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubSubNonInheritedAnnotationInterface.class,
				SearchStrategy.TYPE_HIERARCHY).get(Order.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getAggregateIndex()).isEqualTo(2);
	}

	@Test
	void getWithTypeHierarchyInheritedFromInterfaceMethod()
			throws NoSuchMethodException {
		Method method = ConcreteClassWithInheritedAnnotation.class.getMethod(
				"handleFromInterface");
		MergedAnnotation<?> annotation = MergedAnnotations.from(method,
				SearchStrategy.TYPE_HIERARCHY).get(Order.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getAggregateIndex()).isEqualTo(1);
	}

	@Test
	void getWithTypeHierarchyInheritedFromAbstractMethod() throws NoSuchMethodException {
		Method method = ConcreteClassWithInheritedAnnotation.class.getMethod("handle");
		MergedAnnotation<?> annotation = MergedAnnotations.from(method,
				SearchStrategy.TYPE_HIERARCHY).get(Transactional.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getAggregateIndex()).isEqualTo(1);
	}

	@Test
	void getWithTypeHierarchyInheritedFromBridgedMethod() throws NoSuchMethodException {
		Method method = ConcreteClassWithInheritedAnnotation.class.getMethod(
				"handleParameterized", String.class);
		MergedAnnotation<?> annotation = MergedAnnotations.from(method,
				SearchStrategy.TYPE_HIERARCHY).get(Transactional.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getAggregateIndex()).isEqualTo(1);
	}

	@Test
	void getWithTypeHierarchyFromBridgeMethod() {
		List<Method> methods = new ArrayList<>();
		ReflectionUtils.doWithLocalMethods(StringGenericParameter.class, method -> {
			if ("getFor".equals(method.getName())) {
				methods.add(method);
			}
		});
		Method bridgeMethod = methods.get(0).getReturnType().equals(Object.class) ?
				methods.get(0) : methods.get(1);
		Method bridgedMethod = methods.get(0).getReturnType().equals(Object.class) ?
				methods.get(1) : methods.get(0);
		assertThat(bridgeMethod.isBridge()).isTrue();
		assertThat(bridgedMethod.isBridge()).isFalse();
		MergedAnnotation<?> annotation = MergedAnnotations.from(bridgeMethod,
				SearchStrategy.TYPE_HIERARCHY).get(Order.class);
		assertThat(annotation.isPresent()).isTrue();
		assertThat(annotation.getAggregateIndex()).isEqualTo(0);
	}

	@Test
	void getWithTypeHierarchyFromClassWithMetaAndLocalTxConfig() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				MetaAndLocalTxConfigClass.class, SearchStrategy.TYPE_HIERARCHY).get(
						Transactional.class);
		assertThat(annotation.getString("qualifier")).isEqualTo("localTxMgr");
	}

	@Test
	void getWithTypeHierarchyFromClassWithAttributeAliasesInTargetAnnotation() {
		MergedAnnotation<AliasedTransactional> mergedAnnotation = MergedAnnotations.from(
				AliasedTransactionalComponentClass.class, SearchStrategy.TYPE_HIERARCHY).get(
						AliasedTransactional.class);
		AliasedTransactional synthesizedAnnotation = mergedAnnotation.synthesize();
		String qualifier = "aliasForQualifier";
		assertThat(mergedAnnotation.getString("value")).isEqualTo(qualifier);
		assertThat(mergedAnnotation.getString("qualifier")).isEqualTo(qualifier);
		assertThat(synthesizedAnnotation.value()).isEqualTo(qualifier);
		assertThat(synthesizedAnnotation.qualifier()).isEqualTo(qualifier);
	}

	@Test // gh-23767
	void getWithTypeHierarchyFromClassWithComposedMetaTransactionalAnnotation() {
		MergedAnnotation<AliasedTransactional> mergedAnnotation = MergedAnnotations.from(
				ComposedTransactionalClass.class, SearchStrategy.TYPE_HIERARCHY).get(
						AliasedTransactional.class);
		assertThat(mergedAnnotation.getString("value")).isEqualTo("anotherTransactionManager");
		assertThat(mergedAnnotation.getString("qualifier")).isEqualTo("anotherTransactionManager");
	}

	@Test // gh-23767
	void getWithTypeHierarchyFromClassWithMetaMetaAliasedTransactional() {
		MergedAnnotation<AliasedTransactional> mergedAnnotation = MergedAnnotations.from(
				MetaMetaAliasedTransactionalClass.class, SearchStrategy.TYPE_HIERARCHY).get(
						AliasedTransactional.class);
		assertThat(mergedAnnotation.getString("value")).isEqualTo("meta");
		assertThat(mergedAnnotation.getString("qualifier")).isEqualTo("meta");
	}

	@Test
	void getWithTypeHierarchyFromClassWithAttributeAliasInComposedAnnotationAndNestedAnnotationsInTargetAnnotation() {
		MergedAnnotation<?> annotation = testGetWithTypeHierarchy(
				TestComponentScanClass.class, "com.example.app.test");
		MergedAnnotation<Filter>[] excludeFilters = annotation.getAnnotationArray(
				"excludeFilters", Filter.class);
		assertThat(Arrays.stream(excludeFilters).map(
				filter -> filter.getString("pattern"))).containsExactly("*Test", "*Tests");
	}

	@Test
	void getWithTypeHierarchyFromClassWithBothAttributesOfAnAliasPairDeclared() {
		testGetWithTypeHierarchy(ComponentScanWithBasePackagesAndValueAliasClass.class, "com.example.app.test");
	}

	@Test
	void getWithTypeHierarchyWithSingleElementOverridingAnArrayViaConvention() {
		testGetWithTypeHierarchy(ConventionBasedSinglePackageComponentScanClass.class, "com.example.app.test");
	}

	@Test
	void getWithTypeHierarchyWithSingleElementOverridingAnArrayViaAliasFor() {
		testGetWithTypeHierarchy(AliasForBasedSinglePackageComponentScanClass.class, "com.example.app.test");
	}

	private MergedAnnotation<?> testGetWithTypeHierarchy(Class<?> element, String... expected) {
		MergedAnnotation<?> annotation = MergedAnnotations.from(element,
				SearchStrategy.TYPE_HIERARCHY).get(ComponentScan.class);
		assertThat(annotation.getStringArray("value")).containsExactly(expected);
		assertThat(annotation.getStringArray("basePackages")).containsExactly(expected);
		return annotation;
	}

	@Test
	void getWithTypeHierarchyWhenMultipleMetaAnnotationsHaveClashingAttributeNames() {
		MergedAnnotations annotations = MergedAnnotations.from(
				AliasedComposedContextConfigurationAndTestPropertySourceClass.class,
				SearchStrategy.TYPE_HIERARCHY);
		MergedAnnotation<?> contextConfig = annotations.get(ContextConfiguration.class);
		assertThat(contextConfig.getStringArray("locations")).containsExactly("test.xml");
		assertThat(contextConfig.getStringArray("value")).containsExactly("test.xml");
		MergedAnnotation<?> testPropSource = annotations.get(TestPropertySource.class);
		assertThat(testPropSource.getStringArray("locations")).containsExactly(
				"test.properties");
		assertThat(testPropSource.getStringArray("value")).containsExactly(
				"test.properties");
	}

	@Test
	void getWithTypeHierarchyWithLocalAliasesThatConflictWithAttributesInMetaAnnotationByConvention() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SpringApplicationConfigurationClass.class, SearchStrategy.TYPE_HIERARCHY).get(
						ContextConfiguration.class);
		assertThat(annotation.getStringArray("locations")).isEmpty();
		assertThat(annotation.getStringArray("value")).isEmpty();
		assertThat(annotation.getClassArray("classes")).containsExactly(Number.class);
	}

	@Test
	void getWithTypeHierarchyOnMethodWithSingleElementOverridingAnArrayViaConvention() throws Exception {
		testGetWithTypeHierarchyWebMapping(
				WebController.class.getMethod("postMappedWithPathAttribute"));
	}

	@Test
	void getWithTypeHierarchyOnMethodWithSingleElementOverridingAnArrayViaAliasFor() throws Exception {
		testGetWithTypeHierarchyWebMapping(
				WebController.class.getMethod("getMappedWithValueAttribute"));
		testGetWithTypeHierarchyWebMapping(
				WebController.class.getMethod("getMappedWithPathAttribute"));
	}

	private void testGetWithTypeHierarchyWebMapping(AnnotatedElement element) {
		MergedAnnotation<?> annotation = MergedAnnotations.from(element,
				SearchStrategy.TYPE_HIERARCHY).get(RequestMapping.class);
		assertThat(annotation.getStringArray("value")).containsExactly("/test");
		assertThat(annotation.getStringArray("path")).containsExactly("/test");
	}

	@Test
	void getDirectWithJavaxAnnotationType() throws Exception {
		assertThat(MergedAnnotations.from(ResourceHolder.class).get(
				Resource.class).getString("name")).isEqualTo("x");
	}

	@Test
	void streamInheritedFromClassWithInterface() throws Exception {
		Method method = TransactionalServiceImpl.class.getMethod("doIt");
		assertThat(MergedAnnotations.from(method, SearchStrategy.INHERITED_ANNOTATIONS).stream(
				Transactional.class)).isEmpty();
	}

	@Test
	void streamTypeHierarchyFromClassWithInterface() throws Exception {
		Method method = TransactionalServiceImpl.class.getMethod("doIt");
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).stream(
				Transactional.class)).hasSize(1);
	}

	@Test
	void streamTypeHierarchyAndEnclosingClassesFromNonAnnotatedInnerClassWithAnnotatedEnclosingClass() {
		Stream<Class<?>> classes = MergedAnnotations.from(AnnotatedClass.NonAnnotatedInnerClass.class,
				SearchStrategy.TYPE_HIERARCHY_AND_ENCLOSING_CLASSES).stream().map(MergedAnnotation::getType);
		assertThat(classes).containsExactly(Component.class, Indexed.class);
	}

	@Test
	void streamTypeHierarchyAndEnclosingClassesFromNonAnnotatedStaticNestedClassWithAnnotatedEnclosingClass() {
		Stream<Class<?>> classes = MergedAnnotations.from(AnnotatedClass.NonAnnotatedStaticNestedClass.class,
				SearchStrategy.TYPE_HIERARCHY_AND_ENCLOSING_CLASSES).stream().map(MergedAnnotation::getType);
		assertThat(classes).containsExactly(Component.class, Indexed.class);
	}
	@Test
	void getFromMethodWithMethodAnnotationOnLeaf() throws Exception {
		Method method = Leaf.class.getMethod("annotatedOnLeaf");
		assertThat(method.getAnnotation(Order.class)).isNotNull();
		assertThat(MergedAnnotations.from(method).get(Order.class).getDistance()).isEqualTo(0);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
	}

	@Test
	void getFromMethodWithAnnotationOnMethodInInterface() throws Exception {
		Method method = Leaf.class.getMethod("fromInterfaceImplementedByRoot");
		assertThat(method.getAnnotation(Order.class)).isNull();
		assertThat(MergedAnnotations.from(method).get(Order.class).getDistance()).isEqualTo(-1);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
	}

	@Test
	void getFromMethodWithMetaAnnotationOnLeaf() throws Exception {
		Method method = Leaf.class.getMethod("metaAnnotatedOnLeaf");
		assertThat(method.getAnnotation(Order.class)).isNull();
		assertThat(MergedAnnotations.from(method).get(Order.class).getDistance()).isEqualTo(1);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(1);
	}

	@Test
	void getFromMethodWithMetaMetaAnnotationOnLeaf() throws Exception {
		Method method = Leaf.class.getMethod("metaMetaAnnotatedOnLeaf");
		assertThat(method.getAnnotation(Component.class)).isNull();
		assertThat(MergedAnnotations.from(method).get(Component.class).getDistance()).isEqualTo(2);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Component.class).getDistance()).isEqualTo(2);
	}

	@Test
	void getWithAnnotationOnRoot() throws Exception {
		Method method = Leaf.class.getMethod("annotatedOnRoot");
		assertThat(method.getAnnotation(Order.class)).isNotNull();
		assertThat(MergedAnnotations.from(method).get(Order.class).getDistance()).isEqualTo(0);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
	}

	@Test
	void getFromMethodWithMetaAnnotationOnRoot() throws Exception {
		Method method = Leaf.class.getMethod("metaAnnotatedOnRoot");
		assertThat(method.getAnnotation(Order.class)).isNull();
		assertThat(MergedAnnotations.from(method).get(Order.class).getDistance()).isEqualTo(1);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(1);
	}

	@Test
	void getFromMethodWithOnRootButOverridden() throws Exception {
		Method method = Leaf.class.getMethod("overrideWithoutNewAnnotation");
		assertThat(method.getAnnotation(Order.class)).isNull();
		assertThat(MergedAnnotations.from(method).get(Order.class).getDistance()).isEqualTo(-1);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
	}

	@Test
	void getFromMethodWithNotAnnotated() throws Exception {
		Method method = Leaf.class.getMethod("notAnnotated");
		assertThat(method.getAnnotation(Order.class)).isNull();
		assertThat(MergedAnnotations.from(method).get(Order.class).getDistance()).isEqualTo(-1);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(-1);
	}

	@Test
	void getFromMethodWithBridgeMethod() throws Exception {
		Method method = TransactionalStringGeneric.class.getMethod("something",
				Object.class);
		assertThat(method.isBridge()).isTrue();
		assertThat(method.getAnnotation(Order.class)).isNull();
		assertThat(MergedAnnotations.from(method).get(Order.class).getDistance()).isEqualTo(
				-1);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
		boolean runningInEclipse = Arrays.stream(
				new Exception().getStackTrace()).anyMatch(
						element -> element.getClassName().startsWith("org.eclipse.jdt"));
		// As of JDK 8, invoking getAnnotation() on a bridge method actually
		// finds an
		// annotation on its 'bridged' method [1]; however, the Eclipse compiler
		// will not
		// support this until Eclipse 4.9 [2]. Thus, we effectively ignore the
		// following
		// assertion if the test is currently executing within the Eclipse IDE.
		// [1] https://bugs.openjdk.java.net/browse/JDK-6695379
		// [2] https://bugs.eclipse.org/bugs/show_bug.cgi?id=495396
		if (!runningInEclipse) {
			assertThat(method.getAnnotation(Transactional.class)).isNotNull();
		}
		assertThat(MergedAnnotations.from(method).get(
				Transactional.class).getDistance()).isEqualTo(0);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Transactional.class).getDistance()).isEqualTo(0);
	}

	@Test
	void getFromMethodWithBridgedMethod() throws Exception {
		Method method = TransactionalStringGeneric.class.getMethod("something", String.class);
		assertThat(method.isBridge()).isFalse();
		assertThat(method.getAnnotation(Order.class)).isNull();
		assertThat(MergedAnnotations.from(method).get(Order.class).getDistance()).isEqualTo(-1);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
		assertThat(method.getAnnotation(Transactional.class)).isNotNull();
		assertThat(MergedAnnotations.from(method).get(
				Transactional.class).getDistance()).isEqualTo(0);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Transactional.class).getDistance()).isEqualTo(0);
	}

	@Test
	void getFromMethodWithInterface() throws Exception {
		Method method = ImplementsInterfaceWithAnnotatedMethod.class.getMethod("foo");
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
	}

	@Test // SPR-16060
	void getFromMethodWithGenericInterface() throws Exception {
		Method method = ImplementsInterfaceWithGenericAnnotatedMethod.class.getMethod("foo", String.class);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
	}

	@Test // SPR-17146
	void getFromMethodWithGenericSuperclass() throws Exception {
		Method method = ExtendsBaseClassWithGenericAnnotatedMethod.class.getMethod("foo", String.class);
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
	}

	@Test
	void getFromMethodWithInterfaceOnSuper() throws Exception {
		Method method = SubOfImplementsInterfaceWithAnnotatedMethod.class.getMethod(
				"foo");
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
	}

	@Test
	void getFromMethodWhenInterfaceWhenSuperDoesNotImplementMethod() throws Exception {
		Method method = SubOfAbstractImplementsInterfaceWithAnnotatedMethod.class.getMethod("foo");
		assertThat(MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(
				Order.class).getDistance()).isEqualTo(0);
	}

	@Test
	void getDirectFromClassFavorsMoreLocallyDeclaredComposedAnnotationsOverAnnotationsOnInterfaces() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				ClassWithLocalMetaAnnotationAndMetaAnnotatedInterface.class,
				SearchStrategy.TYPE_HIERARCHY).get(Component.class);
		assertThat(annotation.getString("value")).isEqualTo("meta2");
	}

	@Test
	void getDirectFromClassFavorsMoreLocallyDeclaredComposedAnnotationsOverInheritedAnnotations() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubSubClassWithInheritedAnnotation.class, SearchStrategy.TYPE_HIERARCHY).get(Transactional.class);
		assertThat(annotation.getBoolean("readOnly")).isTrue();
	}

	@Test
	void getDirectFromClassFavorsMoreLocallyDeclaredComposedAnnotationsOverInheritedComposedAnnotations() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubSubClassWithInheritedMetaAnnotation.class,
				SearchStrategy.TYPE_HIERARCHY).get(Component.class);
		assertThat(annotation.getString("value")).isEqualTo("meta2");
	}

	@Test
	void getDirectFromClassgetDirectFromClassMetaMetaAnnotatedClass() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				MetaMetaAnnotatedClass.class, SearchStrategy.TYPE_HIERARCHY).get(Component.class);
		assertThat(annotation.getString("value")).isEqualTo("meta2");
	}

	@Test
	void getDirectFromClassWithMetaMetaMetaAnnotatedClass() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				MetaMetaMetaAnnotatedClass.class, SearchStrategy.TYPE_HIERARCHY).get(Component.class);
		assertThat(annotation.getString("value")).isEqualTo("meta2");
	}

	@Test
	void getDirectFromClassWithAnnotatedClassWithMissingTargetMetaAnnotation() {
		// TransactionalClass is NOT annotated or meta-annotated with @Component
		MergedAnnotation<?> annotation = MergedAnnotations.from(TransactionalClass.class,
				SearchStrategy.TYPE_HIERARCHY).get(Component.class);
		assertThat(annotation.isPresent()).isFalse();
	}

	@Test
	void getDirectFromClassWithMetaCycleAnnotatedClassWithMissingTargetMetaAnnotation() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				MetaCycleAnnotatedClass.class, SearchStrategy.TYPE_HIERARCHY).get(Component.class);
		assertThat(annotation.isPresent()).isFalse();
	}

	@Test
	void getDirectFromClassWithInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				InheritedAnnotationInterface.class, SearchStrategy.TYPE_HIERARCHY).get(Transactional.class);
		assertThat(annotation.getAggregateIndex()).isEqualTo(0);
	}

	@Test
	void getDirectFromClassWithSubInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubInheritedAnnotationInterface.class, SearchStrategy.TYPE_HIERARCHY).get(Transactional.class);
		assertThat(annotation.getAggregateIndex()).isEqualTo(1);
	}

	@Test
	void getDirectFromClassWithSubSubInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubSubInheritedAnnotationInterface.class, SearchStrategy.TYPE_HIERARCHY).get(Transactional.class);
		assertThat(annotation.getAggregateIndex()).isEqualTo(2);
	}

	@Test
	void getDirectFromClassWithNonInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				NonInheritedAnnotationInterface.class, SearchStrategy.TYPE_HIERARCHY).get(Order.class);
		assertThat(annotation.getAggregateIndex()).isEqualTo(0);
	}

	@Test
	void getDirectFromClassWithSubNonInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubNonInheritedAnnotationInterface.class, SearchStrategy.TYPE_HIERARCHY).get(Order.class);
		assertThat(annotation.getAggregateIndex()).isEqualTo(1);
	}

	@Test
	void getDirectFromClassWithSubSubNonInheritedAnnotationInterface() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SubSubNonInheritedAnnotationInterface.class,
				SearchStrategy.TYPE_HIERARCHY).get(Order.class);
		assertThat(annotation.getAggregateIndex()).isEqualTo(2);
	}

	@Test
	void getSuperClassForAllScenarios() {
		// no class-level annotation
		assertThat(MergedAnnotations.from(NonAnnotatedInterface.class,
				SearchStrategy.SUPERCLASS).get(
						Transactional.class).getSource()).isNull();
		assertThat(MergedAnnotations.from(NonAnnotatedClass.class,
				SearchStrategy.SUPERCLASS).get(
						Transactional.class).getSource()).isNull();
		// inherited class-level annotation; note: @Transactional is inherited
		assertThat(MergedAnnotations.from(InheritedAnnotationInterface.class,
				SearchStrategy.SUPERCLASS).get(
						Transactional.class).getSource()).isEqualTo(
								InheritedAnnotationInterface.class);
		assertThat(MergedAnnotations.from(SubInheritedAnnotationInterface.class,
				SearchStrategy.SUPERCLASS).get(
						Transactional.class).getSource()).isNull();
		assertThat(MergedAnnotations.from(InheritedAnnotationClass.class,
				SearchStrategy.SUPERCLASS).get(
						Transactional.class).getSource()).isEqualTo(
								InheritedAnnotationClass.class);
		assertThat(MergedAnnotations.from(SubInheritedAnnotationClass.class,
				SearchStrategy.SUPERCLASS).get(
						Transactional.class).getSource()).isEqualTo(
								InheritedAnnotationClass.class);
		// non-inherited class-level annotation; note: @Order is not inherited,
		// but we should still find it on classes.
		assertThat(MergedAnnotations.from(NonInheritedAnnotationInterface.class,
				SearchStrategy.SUPERCLASS).get(Order.class).getSource()).isEqualTo(
						NonInheritedAnnotationInterface.class);
		assertThat(MergedAnnotations.from(SubNonInheritedAnnotationInterface.class,
				SearchStrategy.SUPERCLASS).get(Order.class).getSource()).isNull();
		assertThat(MergedAnnotations.from(NonInheritedAnnotationClass.class,
				SearchStrategy.SUPERCLASS).get(Order.class).getSource()).isEqualTo(
						NonInheritedAnnotationClass.class);
		assertThat(MergedAnnotations.from(SubNonInheritedAnnotationClass.class,
				SearchStrategy.SUPERCLASS).get(Order.class).getSource()).isEqualTo(
						NonInheritedAnnotationClass.class);
	}

	@Test
	void getSuperClassSourceForTypesWithSingleCandidateType() {
		// no class-level annotation
		List<Class<? extends Annotation>> transactionalCandidateList = Collections.singletonList(Transactional.class);
		assertThat(getSuperClassSourceWithTypeIn(NonAnnotatedInterface.class,
				transactionalCandidateList)).isNull();
		assertThat(getSuperClassSourceWithTypeIn(NonAnnotatedClass.class,
				transactionalCandidateList)).isNull();
		// inherited class-level annotation; note: @Transactional is inherited
		assertThat(getSuperClassSourceWithTypeIn(InheritedAnnotationInterface.class,
				transactionalCandidateList)).isEqualTo(
						InheritedAnnotationInterface.class);
		assertThat(getSuperClassSourceWithTypeIn(SubInheritedAnnotationInterface.class,
				transactionalCandidateList)).isNull();
		assertThat(getSuperClassSourceWithTypeIn(InheritedAnnotationClass.class,
				transactionalCandidateList)).isEqualTo(InheritedAnnotationClass.class);
		assertThat(getSuperClassSourceWithTypeIn(SubInheritedAnnotationClass.class,
				transactionalCandidateList)).isEqualTo(InheritedAnnotationClass.class);
		// non-inherited class-level annotation; note: @Order is not inherited,
		// but should still find it on classes.
		List<Class<? extends Annotation>> orderCandidateList = Collections.singletonList(
				Order.class);
		assertThat(getSuperClassSourceWithTypeIn(NonInheritedAnnotationInterface.class,
				orderCandidateList)).isEqualTo(NonInheritedAnnotationInterface.class);
		assertThat(getSuperClassSourceWithTypeIn(SubNonInheritedAnnotationInterface.class,
				orderCandidateList)).isNull();
		assertThat(getSuperClassSourceWithTypeIn(NonInheritedAnnotationClass.class,
				orderCandidateList)).isEqualTo(NonInheritedAnnotationClass.class);
		assertThat(getSuperClassSourceWithTypeIn(SubNonInheritedAnnotationClass.class,
				orderCandidateList)).isEqualTo(NonInheritedAnnotationClass.class);
	}

	@Test
	void getSuperClassSourceForTypesWithMultipleCandidateTypes() {
		List<Class<? extends Annotation>> candidates = Arrays.asList(Transactional.class, Order.class);
		// no class-level annotation
		assertThat(getSuperClassSourceWithTypeIn(NonAnnotatedInterface.class,
				candidates)).isNull();
		assertThat(getSuperClassSourceWithTypeIn(NonAnnotatedClass.class,
				candidates)).isNull();
		// inherited class-level annotation; note: @Transactional is inherited
		assertThat(getSuperClassSourceWithTypeIn(InheritedAnnotationInterface.class,
				candidates)).isEqualTo(InheritedAnnotationInterface.class);
		assertThat(getSuperClassSourceWithTypeIn(SubInheritedAnnotationInterface.class,
				candidates)).isNull();
		assertThat(getSuperClassSourceWithTypeIn(InheritedAnnotationClass.class,
				candidates)).isEqualTo(InheritedAnnotationClass.class);
		assertThat(getSuperClassSourceWithTypeIn(SubInheritedAnnotationClass.class,
				candidates)).isEqualTo(InheritedAnnotationClass.class);
		// non-inherited class-level annotation; note: @Order is not inherited,
		// but findAnnotationDeclaringClassForTypes() should still find it on
		// classes.
		assertThat(getSuperClassSourceWithTypeIn(NonInheritedAnnotationInterface.class,
				candidates)).isEqualTo(NonInheritedAnnotationInterface.class);
		assertThat(getSuperClassSourceWithTypeIn(SubNonInheritedAnnotationInterface.class,
				candidates)).isNull();
		assertThat(getSuperClassSourceWithTypeIn(NonInheritedAnnotationClass.class,
				candidates)).isEqualTo(NonInheritedAnnotationClass.class);
		assertThat(getSuperClassSourceWithTypeIn(SubNonInheritedAnnotationClass.class,
				candidates)).isEqualTo(NonInheritedAnnotationClass.class);
		// class hierarchy mixed with @Transactional and @Order declarations
		assertThat(getSuperClassSourceWithTypeIn(TransactionalClass.class,
				candidates)).isEqualTo(TransactionalClass.class);
		assertThat(getSuperClassSourceWithTypeIn(TransactionalAndOrderedClass.class,
				candidates)).isEqualTo(TransactionalAndOrderedClass.class);
		assertThat(getSuperClassSourceWithTypeIn(SubTransactionalAndOrderedClass.class,
				candidates)).isEqualTo(TransactionalAndOrderedClass.class);
	}

	private Object getSuperClassSourceWithTypeIn(Class<?> clazz, List<Class<? extends Annotation>> annotationTypes) {
		return MergedAnnotations.from(clazz, SearchStrategy.SUPERCLASS).stream().filter(
				MergedAnnotationPredicates.typeIn(annotationTypes).and(
						MergedAnnotation::isDirectlyPresent)).map(
								MergedAnnotation::getSource).findFirst().orElse(null);
	}

	@Test
	void isDirectlyPresentForAllScenarios() throws Exception {
		// no class-level annotation
		assertThat(MergedAnnotations.from(NonAnnotatedInterface.class).get(
				Transactional.class).isDirectlyPresent()).isFalse();
		assertThat(MergedAnnotations.from(NonAnnotatedInterface.class).isDirectlyPresent(
				Transactional.class)).isFalse();
		assertThat(MergedAnnotations.from(NonAnnotatedClass.class).get(
				Transactional.class).isDirectlyPresent()).isFalse();
		assertThat(MergedAnnotations.from(NonAnnotatedClass.class).isDirectlyPresent(
				Transactional.class)).isFalse();
		// inherited class-level annotation; note: @Transactional is inherited
		assertThat(MergedAnnotations.from(InheritedAnnotationInterface.class).get(
				Transactional.class).isDirectlyPresent()).isTrue();
		assertThat(MergedAnnotations.from(
				InheritedAnnotationInterface.class).isDirectlyPresent(
						Transactional.class)).isTrue();
		assertThat(MergedAnnotations.from(SubInheritedAnnotationInterface.class).get(
				Transactional.class).isDirectlyPresent()).isFalse();
		assertThat(MergedAnnotations.from(
				SubInheritedAnnotationInterface.class).isDirectlyPresent(
						Transactional.class)).isFalse();
		assertThat(MergedAnnotations.from(InheritedAnnotationClass.class).get(
				Transactional.class).isDirectlyPresent()).isTrue();
		assertThat(
				MergedAnnotations.from(InheritedAnnotationClass.class).isDirectlyPresent(
						Transactional.class)).isTrue();
		assertThat(MergedAnnotations.from(SubInheritedAnnotationClass.class).get(
				Transactional.class).isDirectlyPresent()).isFalse();
		assertThat(MergedAnnotations.from(
				SubInheritedAnnotationClass.class).isDirectlyPresent(
						Transactional.class)).isFalse();
		// non-inherited class-level annotation; note: @Order is not inherited
		assertThat(MergedAnnotations.from(NonInheritedAnnotationInterface.class).get(
				Order.class).isDirectlyPresent()).isTrue();
		assertThat(MergedAnnotations.from(
				NonInheritedAnnotationInterface.class).isDirectlyPresent(
						Order.class)).isTrue();
		assertThat(MergedAnnotations.from(SubNonInheritedAnnotationInterface.class).get(
				Order.class).isDirectlyPresent()).isFalse();
		assertThat(MergedAnnotations.from(
				SubNonInheritedAnnotationInterface.class).isDirectlyPresent(
						Order.class)).isFalse();
		assertThat(MergedAnnotations.from(NonInheritedAnnotationClass.class).get(
				Order.class).isDirectlyPresent()).isTrue();
		assertThat(MergedAnnotations.from(
				NonInheritedAnnotationClass.class).isDirectlyPresent(
						Order.class)).isTrue();
		assertThat(MergedAnnotations.from(SubNonInheritedAnnotationClass.class).get(
				Order.class).isDirectlyPresent()).isFalse();
		assertThat(MergedAnnotations.from(
				SubNonInheritedAnnotationClass.class).isDirectlyPresent(
						Order.class)).isFalse();
	}

	@Test
	void getAggregateIndexForAllScenarios() {
		// no class-level annotation
		assertThat(MergedAnnotations.from(NonAnnotatedInterface.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						Transactional.class).getAggregateIndex()).isEqualTo(-1);
		assertThat(MergedAnnotations.from(NonAnnotatedClass.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						Transactional.class).getAggregateIndex()).isEqualTo(-1);
		// inherited class-level annotation; note: @Transactional is inherited
		assertThat(MergedAnnotations.from(InheritedAnnotationInterface.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						Transactional.class).getAggregateIndex()).isEqualTo(0);
		// Since we're not traversing interface hierarchies the following,
		// though perhaps counter intuitive, must be false:
		assertThat(MergedAnnotations.from(SubInheritedAnnotationInterface.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						Transactional.class).getAggregateIndex()).isEqualTo(-1);
		assertThat(MergedAnnotations.from(InheritedAnnotationClass.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						Transactional.class).getAggregateIndex()).isEqualTo(0);
		assertThat(MergedAnnotations.from(SubInheritedAnnotationClass.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						Transactional.class).getAggregateIndex()).isEqualTo(1);
		// non-inherited class-level annotation; note: @Order is not inherited
		assertThat(MergedAnnotations.from(NonInheritedAnnotationInterface.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						Order.class).getAggregateIndex()).isEqualTo(0);
		assertThat(MergedAnnotations.from(SubNonInheritedAnnotationInterface.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						Order.class).getAggregateIndex()).isEqualTo(-1);
		assertThat(MergedAnnotations.from(NonInheritedAnnotationClass.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						Order.class).getAggregateIndex()).isEqualTo(0);
		assertThat(MergedAnnotations.from(SubNonInheritedAnnotationClass.class,
				SearchStrategy.INHERITED_ANNOTATIONS).get(
						Order.class).getAggregateIndex()).isEqualTo(-1);
	}

	@Test
	void getDirectWithoutAttributeAliases() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(WebController.class).get(Component.class);
		assertThat(annotation.getString("value")).isEqualTo("webController");
	}

	@Test
	void getDirectWithNestedAnnotations() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(ComponentScanClass.class).get(ComponentScan.class);
		MergedAnnotation<Filter>[] filters = annotation.getAnnotationArray("excludeFilters", Filter.class);
		assertThat(Arrays.stream(filters).map(
				filter -> filter.getString("pattern"))).containsExactly("*Foo", "*Bar");
	}

	@Test
	void getDirectWithAttributeAliases1() throws Exception {
		Method method = WebController.class.getMethod("handleMappedWithValueAttribute");
		MergedAnnotation<?> annotation = MergedAnnotations.from(method).get(RequestMapping.class);
		assertThat(annotation.getString("name")).isEqualTo("foo");
		assertThat(annotation.getStringArray("value")).containsExactly("/test");
		assertThat(annotation.getStringArray("path")).containsExactly("/test");
	}

	@Test
	void getDirectWithAttributeAliases2() throws Exception {
		Method method = WebController.class.getMethod("handleMappedWithPathAttribute");
		MergedAnnotation<?> annotation = MergedAnnotations.from(method).get(RequestMapping.class);
		assertThat(annotation.getString("name")).isEqualTo("bar");
		assertThat(annotation.getStringArray("value")).containsExactly("/test");
		assertThat(annotation.getStringArray("path")).containsExactly("/test");
	}

	@Test
	void getDirectWithAttributeAliasesWithDifferentValues() throws Exception {
		Method method = WebController.class.getMethod("handleMappedWithDifferentPathAndValueAttributes");
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotations.from(method).get(RequestMapping.class))
				.withMessageContaining("attribute 'path' and its alias 'value'")
				.withMessageContaining("values of [{/test}] and [{/enigma}]");
	}

	@Test
	void getValueFromAnnotation() throws Exception {
		Method method = TransactionalStringGeneric.class.getMethod("something", Object.class);
		MergedAnnotation<?> annotation =
				MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(Order.class);
		assertThat(annotation.getInt("value")).isEqualTo(1);
	}

	@Test
	void getValueFromNonPublicAnnotation() throws Exception {
		Annotation[] declaredAnnotations = NonPublicAnnotatedClass.class.getDeclaredAnnotations();
		assertThat(declaredAnnotations).hasSize(1);
		Annotation annotation = declaredAnnotations[0];
		MergedAnnotation<Annotation> mergedAnnotation = MergedAnnotation.from(annotation);
		assertThat(mergedAnnotation.getType().getSimpleName()).isEqualTo("NonPublicAnnotation");
		assertThat(mergedAnnotation.synthesize().annotationType().getSimpleName()).isEqualTo("NonPublicAnnotation");
		assertThat(mergedAnnotation.getInt("value")).isEqualTo(42);
	}

	@Test
	void getDefaultValueFromAnnotation() throws Exception {
		Method method = TransactionalStringGeneric.class.getMethod("something", Object.class);
		MergedAnnotation<Order> annotation =
				MergedAnnotations.from(method, SearchStrategy.TYPE_HIERARCHY).get(Order.class);
		assertThat(annotation.getDefaultValue("value")).contains(Ordered.LOWEST_PRECEDENCE);
	}

	@Test
	void getDefaultValueFromNonPublicAnnotation() {
		Annotation[] declaredAnnotations = NonPublicAnnotatedClass.class.getDeclaredAnnotations();
		assertThat(declaredAnnotations).hasSize(1);
		Annotation declaredAnnotation = declaredAnnotations[0];
		MergedAnnotation<?> annotation = MergedAnnotation.from(declaredAnnotation);
		assertThat(annotation.getType().getName()).isEqualTo(
				"org.springframework.core.annotation.subpackage.NonPublicAnnotation");
		assertThat(annotation.getDefaultValue("value")).contains(-1);
	}

	@Test
	void getDefaultValueFromAnnotationType() {
		MergedAnnotation<?> annotation = MergedAnnotation.of(Order.class);
		assertThat(annotation.getDefaultValue("value")).contains(Ordered.LOWEST_PRECEDENCE);
	}

	@Test
	void getRepeatableDeclaredOnMethod() throws Exception {
		Method method = InterfaceWithRepeated.class.getMethod("foo");
		Stream<MergedAnnotation<MyRepeatable>> annotations = MergedAnnotations.from(
				method, SearchStrategy.TYPE_HIERARCHY).stream(MyRepeatable.class);
		Stream<String> values = annotations.map(
				annotation -> annotation.getString("value"));
		assertThat(values).containsExactly("A", "B", "C", "meta1");
	}

	@Test
	void getRepeatableDeclaredOnClassWithAttributeAliases() {
		assertThat(MergedAnnotations.from(HierarchyClass.class).stream(
				TestConfiguration.class)).isEmpty();
		RepeatableContainers containers = RepeatableContainers.of(TestConfiguration.class,
				Hierarchy.class);
		MergedAnnotations annotations = MergedAnnotations.from(HierarchyClass.class,
				SearchStrategy.DIRECT, containers, AnnotationFilter.NONE);
		assertThat(annotations.stream(TestConfiguration.class).map(
				annotation -> annotation.getString("location"))).containsExactly("A", "B");
		assertThat(annotations.stream(TestConfiguration.class).map(
				annotation -> annotation.getString("value"))).containsExactly("A", "B");
	}

	@Test
	void getRepeatableDeclaredOnClass() {
		Class<?> element = MyRepeatableClass.class;
		String[] expectedValuesJava = { "A", "B", "C" };
		String[] expectedValuesSpring = { "A", "B", "C", "meta1" };
		testRepeatables(SearchStrategy.SUPERCLASS, element, expectedValuesJava, expectedValuesSpring);
	}

	@Test
	void getRepeatableDeclaredOnSuperclass() {
		Class<?> element = SubMyRepeatableClass.class;
		String[] expectedValuesJava = { "A", "B", "C" };
		String[] expectedValuesSpring = { "A", "B", "C", "meta1" };
		testRepeatables(SearchStrategy.SUPERCLASS, element, expectedValuesJava, expectedValuesSpring);
	}

	@Test
	void getRepeatableDeclaredOnClassAndSuperclass() {
		Class<?> element = SubMyRepeatableWithAdditionalLocalDeclarationsClass.class;
		String[] expectedValuesJava = { "X", "Y", "Z" };
		String[] expectedValuesSpring = { "X", "Y", "Z", "meta2" };
		testRepeatables(SearchStrategy.SUPERCLASS, element, expectedValuesJava, expectedValuesSpring);
	}

	@Test
	void getRepeatableDeclaredOnMultipleSuperclasses() {
		Class<?> element = SubSubMyRepeatableWithAdditionalLocalDeclarationsClass.class;
		String[] expectedValuesJava = { "X", "Y", "Z" };
		String[] expectedValuesSpring = { "X", "Y", "Z", "meta2" };
		testRepeatables(SearchStrategy.SUPERCLASS, element, expectedValuesJava, expectedValuesSpring);
	}

	@Test
	void getDirectRepeatablesDeclaredOnClass() {
		Class<?> element = MyRepeatableClass.class;
		String[] expectedValuesJava = { "A", "B", "C" };
		String[] expectedValuesSpring = { "A", "B", "C", "meta1" };
		testRepeatables(SearchStrategy.DIRECT, element, expectedValuesJava, expectedValuesSpring);
	}

	@Test
	void getDirectRepeatablesDeclaredOnSuperclass() {
		Class<?> element = SubMyRepeatableClass.class;
		String[] expectedValuesJava = {};
		String[] expectedValuesSpring = {};
		testRepeatables(SearchStrategy.DIRECT, element, expectedValuesJava, expectedValuesSpring);
	}

	private void testRepeatables(SearchStrategy searchStrategy, Class<?> element,
			String[] expectedValuesJava, String[] expectedValuesSpring) {

		testJavaRepeatables(searchStrategy, element, expectedValuesJava);
		testExplicitRepeatables(searchStrategy, element, expectedValuesSpring);
		testStandardRepeatables(searchStrategy, element, expectedValuesSpring);
	}

	private void testJavaRepeatables(SearchStrategy searchStrategy, Class<?> element, String[] expected) {
		MyRepeatable[] annotations = searchStrategy == SearchStrategy.DIRECT ?
				element.getDeclaredAnnotationsByType(MyRepeatable.class) :
				element.getAnnotationsByType(MyRepeatable.class);
		assertThat(Arrays.stream(annotations).map(MyRepeatable::value)).containsExactly(
				expected);
	}

	private void testExplicitRepeatables(SearchStrategy searchStrategy, Class<?> element, String[] expected) {
		MergedAnnotations annotations = MergedAnnotations.from(element, searchStrategy,
				RepeatableContainers.of(MyRepeatable.class, MyRepeatableContainer.class),
				AnnotationFilter.PLAIN);
		assertThat(annotations.stream(MyRepeatable.class).filter(
				MergedAnnotationPredicates.firstRunOf(
						MergedAnnotation::getAggregateIndex)).map(
								annotation -> annotation.getString(
										"value"))).containsExactly(expected);
	}

	private void testStandardRepeatables(SearchStrategy searchStrategy, Class<?> element, String[] expected) {
		MergedAnnotations annotations = MergedAnnotations.from(element, searchStrategy);
		assertThat(annotations.stream(MyRepeatable.class).filter(
				MergedAnnotationPredicates.firstRunOf(
						MergedAnnotation::getAggregateIndex)).map(
								annotation -> annotation.getString(
										"value"))).containsExactly(expected);
	}

	@Test
	void synthesizeWithoutAttributeAliases() throws Exception {
		Component component = WebController.class.getAnnotation(Component.class);
		assertThat(component).isNotNull();
		Component synthesizedComponent = MergedAnnotation.from(component).synthesize();
		assertThat(synthesizedComponent).isNotNull();
		assertThat(synthesizedComponent).isEqualTo(component);
		assertThat(synthesizedComponent.value()).isEqualTo("webController");
	}

	@Test
	void synthesizeAlreadySynthesized() throws Exception {
		Method method = WebController.class.getMethod("handleMappedWithValueAttribute");
		RequestMapping webMapping = method.getAnnotation(RequestMapping.class);
		assertThat(webMapping).isNotNull();
		RequestMapping synthesizedWebMapping = MergedAnnotation.from(webMapping).synthesize();
		RequestMapping synthesizedAgainWebMapping = MergedAnnotation.from(synthesizedWebMapping).synthesize();
		assertThat(synthesizedWebMapping).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(synthesizedAgainWebMapping).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(synthesizedWebMapping).isEqualTo(synthesizedAgainWebMapping);
		assertThat(synthesizedWebMapping.name()).isEqualTo("foo");
		assertThat(synthesizedWebMapping.path()).containsExactly("/test");
		assertThat(synthesizedWebMapping.value()).containsExactly("/test");
	}

	@Test
	void synthesizeWhenAliasForIsMissingAttributeDeclaration() throws Exception {
		AliasForWithMissingAttributeDeclaration annotation =
				AliasForWithMissingAttributeDeclarationClass.class.getAnnotation(
						AliasForWithMissingAttributeDeclaration.class);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(annotation))
			.withMessageStartingWith("@AliasFor declaration on attribute 'foo' in annotation")
			.withMessageContaining(AliasForWithMissingAttributeDeclaration.class.getName())
			.withMessageContaining("points to itself");
	}

	@Test
	void synthesizeWhenAliasForHasDuplicateAttributeDeclaration() throws Exception {
		AliasForWithDuplicateAttributeDeclaration annotation = AliasForWithDuplicateAttributeDeclarationClass.class.getAnnotation(
				AliasForWithDuplicateAttributeDeclaration.class);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(annotation))
			.withMessageStartingWith("In @AliasFor declared on attribute 'foo' in annotation")
			.withMessageContaining(AliasForWithDuplicateAttributeDeclaration.class.getName())
			.withMessageContaining("attribute 'attribute' and its alias 'value' are present with values of 'baz' and 'bar'");
	}

	@Test
	void synthesizeWhenAttributeAliasForNonexistentAttribute() throws Exception {
		AliasForNonexistentAttribute annotation = AliasForNonexistentAttributeClass.class.getAnnotation(
				AliasForNonexistentAttribute.class);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(annotation))
			.withMessageStartingWith("@AliasFor declaration on attribute 'foo' in annotation")
			.withMessageContaining(AliasForNonexistentAttribute.class.getName())
			.withMessageContaining("declares an alias for 'bar' which is not present");
	}

	@Test
	void synthesizeWhenAttributeAliasWithMirroredAliasForWrongAttribute() throws Exception {
		AliasForWithMirroredAliasForWrongAttribute annotation =
				AliasForWithMirroredAliasForWrongAttributeClass.class.getAnnotation(
						AliasForWithMirroredAliasForWrongAttribute.class);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(annotation))
			.withMessage("@AliasFor declaration on attribute 'bar' in annotation ["
				+ AliasForWithMirroredAliasForWrongAttribute.class.getName()
				+ "] declares an alias for 'quux' which is not present.");
	}

	@Test
	void synthesizeWhenAttributeAliasForAttributeOfDifferentType() throws Exception {
		AliasForAttributeOfDifferentType annotation = AliasForAttributeOfDifferentTypeClass.class.getAnnotation(
				AliasForAttributeOfDifferentType.class);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(annotation))
			.withMessageStartingWith("Misconfigured aliases")
			.withMessageContaining(AliasForAttributeOfDifferentType.class.getName())
			.withMessageContaining("attribute 'foo'")
			.withMessageContaining("attribute 'bar'")
			.withMessageContaining("same return type");
	}

	@Test
	void synthesizeWhenAttributeAliasForWithMissingDefaultValues() throws Exception {
		AliasForWithMissingDefaultValues annotation = AliasForWithMissingDefaultValuesClass.class.getAnnotation(
				AliasForWithMissingDefaultValues.class);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(annotation))
			.withMessageStartingWith("Misconfigured aliases")
			.withMessageContaining(AliasForWithMissingDefaultValues.class.getName())
			.withMessageContaining("attribute 'foo' in annotation")
			.withMessageContaining("attribute 'bar' in annotation")
			.withMessageContaining("default values");
	}

	@Test
	void synthesizeWhenAttributeAliasForAttributeWithDifferentDefaultValue() throws Exception {
		AliasForAttributeWithDifferentDefaultValue annotation =
				AliasForAttributeWithDifferentDefaultValueClass.class.getAnnotation(
						AliasForAttributeWithDifferentDefaultValue.class);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(annotation))
			.withMessageStartingWith("Misconfigured aliases")
			.withMessageContaining(AliasForAttributeWithDifferentDefaultValue.class.getName())
			.withMessageContaining("attribute 'foo' in annotation")
			.withMessageContaining("attribute 'bar' in annotation")
			.withMessageContaining("same default value");
	}

	@Test
	void synthesizeWhenAttributeAliasForMetaAnnotationThatIsNotMetaPresent() throws Exception {
		AliasedComposedTestConfigurationNotMetaPresent annotation =
				AliasedComposedTestConfigurationNotMetaPresentClass.class.getAnnotation(
						AliasedComposedTestConfigurationNotMetaPresent.class);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(annotation))
			.withMessageStartingWith("@AliasFor declaration on attribute 'xmlConfigFile' in annotation")
			.withMessageContaining(AliasedComposedTestConfigurationNotMetaPresent.class.getName())
			.withMessageContaining("declares an alias for attribute 'location' in annotation")
			.withMessageContaining(TestConfiguration.class.getName())
			.withMessageContaining("not meta-present");
	}

	@Test
	void synthesizeWithImplicitAliases() throws Exception {
		testSynthesisWithImplicitAliases(ValueImplicitAliasesTestConfigurationClass.class, "value");
		testSynthesisWithImplicitAliases(Location1ImplicitAliasesTestConfigurationClass.class, "location1");
		testSynthesisWithImplicitAliases(XmlImplicitAliasesTestConfigurationClass.class, "xmlFile");
		testSynthesisWithImplicitAliases(GroovyImplicitAliasesSimpleTestConfigurationClass.class, "groovyScript");
	}

	private void testSynthesisWithImplicitAliases(Class<?> clazz, String expected)
			throws Exception {
		ImplicitAliasesTestConfiguration config = clazz.getAnnotation(
				ImplicitAliasesTestConfiguration.class);
		assertThat(config).isNotNull();
		ImplicitAliasesTestConfiguration synthesized = MergedAnnotation.from(
				config).synthesize();
		assertThat(synthesized).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(synthesized.value()).isEqualTo(expected);
		assertThat(synthesized.location1()).isEqualTo(expected);
		assertThat(synthesized.xmlFile()).isEqualTo(expected);
		assertThat(synthesized.groovyScript()).isEqualTo(expected);
	}

	@Test
	void synthesizeWithImplicitAliasesWithImpliedAliasNamesOmitted()
			throws Exception {
		testSynthesisWithImplicitAliasesWithImpliedAliasNamesOmitted(
				ValueImplicitAliasesWithImpliedAliasNamesOmittedTestConfigurationClass.class,
				"value");
		testSynthesisWithImplicitAliasesWithImpliedAliasNamesOmitted(
				LocationsImplicitAliasesWithImpliedAliasNamesOmittedTestConfigurationClass.class,
				"location");
		testSynthesisWithImplicitAliasesWithImpliedAliasNamesOmitted(
				XmlFilesImplicitAliasesWithImpliedAliasNamesOmittedTestConfigurationClass.class,
				"xmlFile");
	}

	private void testSynthesisWithImplicitAliasesWithImpliedAliasNamesOmitted(
			Class<?> clazz, String expected) {
		ImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration config = clazz.getAnnotation(
				ImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration.class);
		assertThat(config).isNotNull();
		ImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration synthesized =
				MergedAnnotation.from(config).synthesize();
		assertThat(synthesized).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(synthesized.value()).isEqualTo(expected);
		assertThat(synthesized.location()).isEqualTo(expected);
		assertThat(synthesized.xmlFile()).isEqualTo(expected);
	}

	@Test
	void synthesizeWithImplicitAliasesForAliasPair() throws Exception {
		ImplicitAliasesForAliasPairTestConfiguration config =
				ImplicitAliasesForAliasPairTestConfigurationClass.class.getAnnotation(
						ImplicitAliasesForAliasPairTestConfiguration.class);
		ImplicitAliasesForAliasPairTestConfiguration synthesized = MergedAnnotation.from(config).synthesize();
		assertThat(synthesized).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(synthesized.xmlFile()).isEqualTo("test.xml");
		assertThat(synthesized.groovyScript()).isEqualTo("test.xml");
	}

	@Test
	void synthesizeWithTransitiveImplicitAliases() throws Exception {
		TransitiveImplicitAliasesTestConfiguration config =
				TransitiveImplicitAliasesTestConfigurationClass.class.getAnnotation(
						TransitiveImplicitAliasesTestConfiguration.class);
		TransitiveImplicitAliasesTestConfiguration synthesized = MergedAnnotation.from(config).synthesize();
		assertThat(synthesized).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(synthesized.xml()).isEqualTo("test.xml");
		assertThat(synthesized.groovy()).isEqualTo("test.xml");
	}

	@Test
	void synthesizeWithTransitiveImplicitAliasesForAliasPair() throws Exception {
		TransitiveImplicitAliasesForAliasPairTestConfiguration config =
				TransitiveImplicitAliasesForAliasPairTestConfigurationClass.class.getAnnotation(
						TransitiveImplicitAliasesForAliasPairTestConfiguration.class);
		TransitiveImplicitAliasesForAliasPairTestConfiguration synthesized = MergedAnnotation.from(
				config).synthesize();
		assertThat(synthesized).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(synthesized.xml()).isEqualTo("test.xml");
		assertThat(synthesized.groovy()).isEqualTo("test.xml");
	}

	@Test
	void synthesizeWithImplicitAliasesWithMissingDefaultValues() throws Exception {
		Class<?> clazz = ImplicitAliasesWithMissingDefaultValuesTestConfigurationClass.class;
		Class<ImplicitAliasesWithMissingDefaultValuesTestConfiguration> annotationType =
				ImplicitAliasesWithMissingDefaultValuesTestConfiguration.class;
		ImplicitAliasesWithMissingDefaultValuesTestConfiguration config = clazz.getAnnotation(
				annotationType);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(clazz, config))
			.withMessageStartingWith("Misconfigured aliases:")
			.withMessageContaining("attribute 'location1' in annotation [" + annotationType.getName() + "]")
			.withMessageContaining("attribute 'location2' in annotation [" + annotationType.getName() + "]")
			.withMessageContaining("default values");
	}

	@Test
	void synthesizeWithImplicitAliasesWithDifferentDefaultValues()
			throws Exception {
		Class<?> clazz = ImplicitAliasesWithDifferentDefaultValuesTestConfigurationClass.class;
		Class<ImplicitAliasesWithDifferentDefaultValuesTestConfiguration> annotationType =
				ImplicitAliasesWithDifferentDefaultValuesTestConfiguration.class;
		ImplicitAliasesWithDifferentDefaultValuesTestConfiguration config = clazz.getAnnotation(
				annotationType);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(clazz, config))
			.withMessageStartingWith("Misconfigured aliases:")
			.withMessageContaining("attribute 'location1' in annotation [" + annotationType.getName() + "]")
			.withMessageContaining("attribute 'location2' in annotation [" + annotationType.getName() + "]")
			.withMessageContaining("same default value");
	}

	@Test
	void synthesizeWithImplicitAliasesWithDuplicateValues() throws Exception {
		Class<?> clazz = ImplicitAliasesWithDuplicateValuesTestConfigurationClass.class;
		Class<ImplicitAliasesWithDuplicateValuesTestConfiguration> annotationType =
				ImplicitAliasesWithDuplicateValuesTestConfiguration.class;
		ImplicitAliasesWithDuplicateValuesTestConfiguration config = clazz.getAnnotation(
				annotationType);
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(clazz, config))
			.withMessageStartingWith("Different @AliasFor mirror values for annotation")
			.withMessageContaining(annotationType.getName())
			.withMessageContaining("declared on class")
			.withMessageContaining(clazz.getName())
			.withMessageContaining("are declared with values of");
	}

	@Test
	void synthesizeFromMapWithoutAttributeAliases() throws Exception {
		Component component = WebController.class.getAnnotation(Component.class);
		assertThat(component).isNotNull();
		Map<String, Object> map = Collections.singletonMap("value", "webController");
		MergedAnnotation<Component> annotation = MergedAnnotation.of(Component.class, map);
		Component synthesizedComponent = annotation.synthesize();
		assertThat(synthesizedComponent).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(synthesizedComponent.value()).isEqualTo("webController");
	}

	@Test
	@SuppressWarnings("unchecked")
	void synthesizeFromMapWithNestedMap() throws Exception {
		ComponentScanSingleFilter componentScan = ComponentScanSingleFilterClass.class.getAnnotation(
				ComponentScanSingleFilter.class);
		assertThat(componentScan).isNotNull();
		assertThat(componentScan.value().pattern()).isEqualTo("*Foo");
		Map<String, Object> map = MergedAnnotation.from(componentScan).asMap(
				annotation -> new LinkedHashMap<String, Object>(),
				Adapt.ANNOTATION_TO_MAP);
		Map<String, Object> filterMap = (Map<String, Object>) map.get("value");
		assertThat(filterMap.get("pattern")).isEqualTo("*Foo");
		filterMap.put("pattern", "newFoo");
		filterMap.put("enigma", 42);
		MergedAnnotation<ComponentScanSingleFilter> annotation = MergedAnnotation.of(
				ComponentScanSingleFilter.class, map);
		ComponentScanSingleFilter synthesizedComponentScan = annotation.synthesize();
		assertThat(synthesizedComponentScan).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(synthesizedComponentScan.value().pattern()).isEqualTo("newFoo");
	}

	@Test
	@SuppressWarnings("unchecked")
	void synthesizeFromMapWithNestedArrayOfMaps() throws Exception {
		ComponentScan componentScan = ComponentScanClass.class.getAnnotation(
				ComponentScan.class);
		assertThat(componentScan).isNotNull();
		Map<String, Object> map = MergedAnnotation.from(componentScan).asMap(
				annotation -> new LinkedHashMap<String, Object>(),
				Adapt.ANNOTATION_TO_MAP);
		Map<String, Object>[] filters = (Map[]) map.get("excludeFilters");
		List<String> patterns = Arrays.stream(filters).map(
				m -> (String) m.get("pattern")).collect(Collectors.toList());
		assertThat(patterns).containsExactly("*Foo", "*Bar");
		filters[0].put("pattern", "newFoo");
		filters[0].put("enigma", 42);
		filters[1].put("pattern", "newBar");
		filters[1].put("enigma", 42);
		MergedAnnotation<ComponentScan> annotation = MergedAnnotation.of(
				ComponentScan.class, map);
		ComponentScan synthesizedComponentScan = annotation.synthesize();
		assertThat(synthesizedComponentScan).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(Arrays.stream(synthesizedComponentScan.excludeFilters()).map(
				Filter::pattern)).containsExactly("newFoo", "newBar");
	}

	@Test
	void synthesizeFromDefaultsWithoutAttributeAliases() throws Exception {
		MergedAnnotation<AnnotationWithDefaults> annotation = MergedAnnotation.of(
				AnnotationWithDefaults.class);
		AnnotationWithDefaults synthesized = annotation.synthesize();
		assertThat(synthesized.text()).isEqualTo("enigma");
		assertThat(synthesized.predicate()).isTrue();
		assertThat(synthesized.characters()).containsExactly('a', 'b', 'c');
	}

	@Test
	void synthesizeFromDefaultsWithAttributeAliases() throws Exception {
		MergedAnnotation<TestConfiguration> annotation = MergedAnnotation.of(
				TestConfiguration.class);
		TestConfiguration synthesized = annotation.synthesize();
		assertThat(synthesized.value()).isEqualTo("");
		assertThat(synthesized.location()).isEqualTo("");
	}

	@Test
	void synthesizeWhenAttributeAliasesWithDifferentValues() throws Exception {
		assertThatExceptionOfType(AnnotationConfigurationException.class).isThrownBy(() ->
				MergedAnnotation.from(TestConfigurationMismatch.class.getAnnotation(TestConfiguration.class)).synthesize());
	}

	@Test
	void synthesizeFromMapWithMinimalAttributesWithAttributeAliases()
			throws Exception {
		Map<String, Object> map = Collections.singletonMap("location", "test.xml");
		MergedAnnotation<TestConfiguration> annotation = MergedAnnotation.of(
				TestConfiguration.class, map);
		TestConfiguration synthesized = annotation.synthesize();
		assertThat(synthesized.value()).isEqualTo("test.xml");
		assertThat(synthesized.location()).isEqualTo("test.xml");
	}

	@Test
	void synthesizeFromMapWithAttributeAliasesThatOverrideArraysWithSingleElements()
			throws Exception {
		synthesizeFromMapWithAttributeAliasesThatOverrideArraysWithSingleElements(
				Collections.singletonMap("value", "/foo"));
		synthesizeFromMapWithAttributeAliasesThatOverrideArraysWithSingleElements(
				Collections.singletonMap("path", "/foo"));
	}

	private void synthesizeFromMapWithAttributeAliasesThatOverrideArraysWithSingleElements(
			Map<String, Object> map) {
		MergedAnnotation<GetMapping> annotation = MergedAnnotation.of(GetMapping.class,
				map);
		GetMapping synthesized = annotation.synthesize();
		assertThat(synthesized.value()).isEqualTo("/foo");
		assertThat(synthesized.path()).isEqualTo("/foo");
	}

	@Test
	void synthesizeFromMapWithImplicitAttributeAliases() throws Exception {
		testSynthesisFromMapWithImplicitAliases("value");
		testSynthesisFromMapWithImplicitAliases("location1");
		testSynthesisFromMapWithImplicitAliases("location2");
		testSynthesisFromMapWithImplicitAliases("location3");
		testSynthesisFromMapWithImplicitAliases("xmlFile");
		testSynthesisFromMapWithImplicitAliases("groovyScript");
	}

	private void testSynthesisFromMapWithImplicitAliases(String attributeNameAndValue)
			throws Exception {
		Map<String, Object> map = Collections.singletonMap(attributeNameAndValue,
				attributeNameAndValue);
		MergedAnnotation<ImplicitAliasesTestConfiguration> annotation = MergedAnnotation.of(
				ImplicitAliasesTestConfiguration.class, map);
		ImplicitAliasesTestConfiguration synthesized = annotation.synthesize();
		assertThat(synthesized.value()).isEqualTo(attributeNameAndValue);
		assertThat(synthesized.location1()).isEqualTo(attributeNameAndValue);
		assertThat(synthesized.location2()).isEqualTo(attributeNameAndValue);
		assertThat(synthesized.location2()).isEqualTo(attributeNameAndValue);
		assertThat(synthesized.xmlFile()).isEqualTo(attributeNameAndValue);
		assertThat(synthesized.groovyScript()).isEqualTo(attributeNameAndValue);
	}

	@Test
	void synthesizeFromMapWithMissingAttributeValue() throws Exception {
		testMissingTextAttribute(Collections.emptyMap());
	}

	@Test
	void synthesizeFromMapWithNullAttributeValue() throws Exception {
		Map<String, Object> map = Collections.singletonMap("text", null);
		assertThat(map).containsKey("text");
		testMissingTextAttribute(map);
	}

	private void testMissingTextAttribute(Map<String, Object> attributes) {
		assertThatExceptionOfType(NoSuchElementException.class).isThrownBy(() ->
				MergedAnnotation.of(AnnotationWithoutDefaults.class, attributes).synthesize().text())
			.withMessage("No value found for attribute named 'text' in merged annotation " +
					AnnotationWithoutDefaults.class.getName());
	}

	@Test
	void synthesizeFromMapWithAttributeOfIncorrectType() throws Exception {
		Map<String, Object> map = Collections.singletonMap("value", 42L);
		MergedAnnotation<Component> annotation = MergedAnnotation.of(Component.class, map);
		assertThatIllegalStateException().isThrownBy(() -> annotation.synthesize().value())
				.withMessage("Attribute 'value' in annotation " +
						"org.springframework.stereotype.Component should be " +
						"compatible with java.lang.String but a java.lang.Long value was returned");
	}

	@Test
	void synthesizeFromAnnotationAttributesWithoutAttributeAliases() throws Exception {
		Component component = WebController.class.getAnnotation(Component.class);
		assertThat(component).isNotNull();
		Map<String, Object> attributes = MergedAnnotation.from(component).asMap();
		Component synthesized = MergedAnnotation.of(Component.class, attributes).synthesize();
		assertThat(synthesized).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(synthesized).isEqualTo(component);
	}

	@Test
	void toStringForSynthesizedAnnotations() throws Exception {
		Method methodWithPath = WebController.class.getMethod("handleMappedWithPathAttribute");
		RequestMapping webMappingWithAliases = methodWithPath.getAnnotation(RequestMapping.class);
		assertThat(webMappingWithAliases).isNotNull();
		Method methodWithPathAndValue = WebController.class.getMethod("handleMappedWithSamePathAndValueAttributes");
		RequestMapping webMappingWithPathAndValue = methodWithPathAndValue.getAnnotation(RequestMapping.class);
		assertThat(methodWithPathAndValue).isNotNull();
		RequestMapping synthesizedWebMapping1 = MergedAnnotation.from(webMappingWithAliases).synthesize();
		RequestMapping synthesizedWebMapping2 = MergedAnnotation.from(webMappingWithPathAndValue).synthesize();
		assertThat(webMappingWithAliases.toString()).isNotEqualTo(synthesizedWebMapping1.toString());
		assertToStringForWebMappingWithPathAndValue(synthesizedWebMapping1);
		assertToStringForWebMappingWithPathAndValue(synthesizedWebMapping2);
	}

	private void assertToStringForWebMappingWithPathAndValue(RequestMapping webMapping) {
		String prefix = "@" + RequestMapping.class.getName() + "(";
		assertThat(webMapping.toString()).startsWith(prefix).contains("value=[/test]",
				"path=[/test]", "name=bar", "method=", "[GET, POST]").endsWith(")");
	}

	@Test
	void equalsForSynthesizedAnnotations() throws Exception {
		Method methodWithPath = WebController.class.getMethod(
				"handleMappedWithPathAttribute");
		RequestMapping webMappingWithAliases = methodWithPath.getAnnotation(
				RequestMapping.class);
		assertThat(webMappingWithAliases).isNotNull();
		Method methodWithPathAndValue = WebController.class.getMethod(
				"handleMappedWithSamePathAndValueAttributes");
		RequestMapping webMappingWithPathAndValue = methodWithPathAndValue.getAnnotation(
				RequestMapping.class);
		assertThat(webMappingWithPathAndValue).isNotNull();
		RequestMapping synthesizedWebMapping1 = MergedAnnotation.from(
				webMappingWithAliases).synthesize();
		RequestMapping synthesizedWebMapping2 = MergedAnnotation.from(
				webMappingWithPathAndValue).synthesize();
		// Equality amongst standard annotations
		assertThat(webMappingWithAliases).isEqualTo(webMappingWithAliases);
		assertThat(webMappingWithPathAndValue).isEqualTo(webMappingWithPathAndValue);
		// Inequality amongst standard annotations
		assertThat(webMappingWithAliases).isNotEqualTo(webMappingWithPathAndValue);
		assertThat(webMappingWithPathAndValue).isNotEqualTo(webMappingWithAliases);
		// Equality amongst synthesized annotations
		assertThat(synthesizedWebMapping1).isEqualTo(synthesizedWebMapping1);
		assertThat(synthesizedWebMapping2).isEqualTo(synthesizedWebMapping2);
		assertThat(synthesizedWebMapping1).isEqualTo(synthesizedWebMapping2);
		assertThat(synthesizedWebMapping2).isEqualTo(synthesizedWebMapping1);
		// Equality between standard and synthesized annotations
		assertThat(synthesizedWebMapping1).isEqualTo(webMappingWithPathAndValue);
		assertThat(webMappingWithPathAndValue).isEqualTo(synthesizedWebMapping1);
		// Inequality between standard and synthesized annotations
		assertThat(synthesizedWebMapping1).isNotEqualTo(webMappingWithAliases);
		assertThat(webMappingWithAliases).isNotEqualTo(synthesizedWebMapping1);
	}

	@Test
	void hashCodeForSynthesizedAnnotations() throws Exception {
		Method methodWithPath = WebController.class.getMethod(
				"handleMappedWithPathAttribute");
		RequestMapping webMappingWithAliases = methodWithPath.getAnnotation(
				RequestMapping.class);
		assertThat(webMappingWithAliases).isNotNull();
		Method methodWithPathAndValue = WebController.class.getMethod(
				"handleMappedWithSamePathAndValueAttributes");
		RequestMapping webMappingWithPathAndValue = methodWithPathAndValue.getAnnotation(
				RequestMapping.class);
		assertThat(webMappingWithPathAndValue).isNotNull();
		RequestMapping synthesizedWebMapping1 = MergedAnnotation.from(
				webMappingWithAliases).synthesize();
		assertThat(synthesizedWebMapping1).isNotNull();
		RequestMapping synthesizedWebMapping2 = MergedAnnotation.from(
				webMappingWithPathAndValue).synthesize();
		assertThat(synthesizedWebMapping2).isNotNull();
		// Equality amongst standard annotations
		assertThat(webMappingWithAliases.hashCode()).isEqualTo(
				webMappingWithAliases.hashCode());
		assertThat(webMappingWithPathAndValue.hashCode()).isEqualTo(
				webMappingWithPathAndValue.hashCode());
		// Inequality amongst standard annotations
		assertThat(webMappingWithAliases.hashCode()).isNotEqualTo(
				webMappingWithPathAndValue.hashCode());
		assertThat(webMappingWithPathAndValue.hashCode()).isNotEqualTo(
				webMappingWithAliases.hashCode());
		// Equality amongst synthesized annotations
		assertThat(synthesizedWebMapping1.hashCode()).isEqualTo(
				synthesizedWebMapping1.hashCode());
		assertThat(synthesizedWebMapping2.hashCode()).isEqualTo(
				synthesizedWebMapping2.hashCode());
		assertThat(synthesizedWebMapping1.hashCode()).isEqualTo(
				synthesizedWebMapping2.hashCode());
		assertThat(synthesizedWebMapping2.hashCode()).isEqualTo(
				synthesizedWebMapping1.hashCode());
		// Equality between standard and synthesized annotations
		assertThat(synthesizedWebMapping1.hashCode()).isEqualTo(
				webMappingWithPathAndValue.hashCode());
		assertThat(webMappingWithPathAndValue.hashCode()).isEqualTo(
				synthesizedWebMapping1.hashCode());
		// Inequality between standard and synthesized annotations
		assertThat(synthesizedWebMapping1.hashCode()).isNotEqualTo(
				webMappingWithAliases.hashCode());
		assertThat(webMappingWithAliases.hashCode()).isNotEqualTo(
				synthesizedWebMapping1.hashCode());
	}

	/**
	 * Fully reflection-based test that verifies support for synthesizing
	 * annotations across packages with non-public visibility of user types
	 * (e.g., a non-public annotation that uses {@code @AliasFor}).
	 */
	@Test
	@SuppressWarnings("unchecked")
	void synthesizeNonPublicWithAttributeAliasesFromDifferentPackage() throws Exception {
		Class<?> type = ClassUtils.forName(
				"org.springframework.core.annotation.subpackage.NonPublicAliasedAnnotatedClass",
				null);
		Class<? extends Annotation> annotationType = (Class<? extends Annotation>) ClassUtils.forName(
				"org.springframework.core.annotation.subpackage.NonPublicAliasedAnnotation",
				null);
		Annotation annotation = type.getAnnotation(annotationType);
		assertThat(annotation).isNotNull();
		MergedAnnotation<Annotation> mergedAnnotation = MergedAnnotation.from(annotation);
		Annotation synthesizedAnnotation = mergedAnnotation.synthesize();
		assertThat(synthesizedAnnotation).isInstanceOf(SynthesizedAnnotation.class);
		assertThat(mergedAnnotation.getString("name")).isEqualTo("test");
		assertThat(mergedAnnotation.getString("path")).isEqualTo("/test");
		assertThat(mergedAnnotation.getString("value")).isEqualTo("/test");
	}

	@Test
	void synthesizeWithAttributeAliasesInNestedAnnotations() throws Exception {
		Hierarchy hierarchy = HierarchyClass.class.getAnnotation(Hierarchy.class);
		assertThat(hierarchy).isNotNull();
		Hierarchy synthesizedHierarchy = MergedAnnotation.from(hierarchy).synthesize();
		assertThat(synthesizedHierarchy).isInstanceOf(SynthesizedAnnotation.class);
		TestConfiguration[] configs = synthesizedHierarchy.value();
		assertThat(configs).isNotNull();
		assertThat(configs).allMatch(SynthesizedAnnotation.class::isInstance);
		assertThat(
				Arrays.stream(configs).map(TestConfiguration::location)).containsExactly(
						"A", "B");
		assertThat(Arrays.stream(configs).map(TestConfiguration::value)).containsExactly(
				"A", "B");
	}

	@Test
	void synthesizeWithArrayOfAnnotations() throws Exception {
		Hierarchy hierarchy = HierarchyClass.class.getAnnotation(Hierarchy.class);
		assertThat(hierarchy).isNotNull();
		Hierarchy synthesizedHierarchy = MergedAnnotation.from(hierarchy).synthesize();
		assertThat(synthesizedHierarchy).isInstanceOf(SynthesizedAnnotation.class);
		TestConfiguration contextConfig = TestConfigurationClass.class.getAnnotation(
				TestConfiguration.class);
		assertThat(contextConfig).isNotNull();
		TestConfiguration[] configs = synthesizedHierarchy.value();
		assertThat(
				Arrays.stream(configs).map(TestConfiguration::location)).containsExactly(
						"A", "B");
		// Alter array returned from synthesized annotation
		configs[0] = contextConfig;
		// Re-retrieve the array from the synthesized annotation
		configs = synthesizedHierarchy.value();
		assertThat(
				Arrays.stream(configs).map(TestConfiguration::location)).containsExactly(
						"A", "B");
	}

	@Test
	void synthesizeWithArrayOfChars() throws Exception {
		CharsContainer charsContainer = GroupOfCharsClass.class.getAnnotation(
				CharsContainer.class);
		assertThat(charsContainer).isNotNull();
		CharsContainer synthesizedCharsContainer = MergedAnnotation.from(
				charsContainer).synthesize();
		assertThat(synthesizedCharsContainer).isInstanceOf(SynthesizedAnnotation.class);
		char[] chars = synthesizedCharsContainer.chars();
		assertThat(chars).containsExactly('x', 'y', 'z');
		// Alter array returned from synthesized annotation
		chars[0] = '?';
		// Re-retrieve the array from the synthesized annotation
		chars = synthesizedCharsContainer.chars();
		assertThat(chars).containsExactly('x', 'y', 'z');
	}

	@Test
	void getValueWhenHasDefaultOverride() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				DefaultOverrideClass.class).get(DefaultOverrideRoot.class);
		assertThat(annotation.getString("text")).isEqualTo("metameta");
	}

	@Test // gh-22654
	void getValueWhenHasDefaultOverrideWithImplicitAlias() {
		MergedAnnotation<?> annotation1 = MergedAnnotations.from(
				DefaultOverrideImplicitAliasMetaClass1.class).get(DefaultOverrideRoot.class);
		assertThat(annotation1.getString("text")).isEqualTo("alias-meta-1");
		MergedAnnotation<?> annotation2 = MergedAnnotations.from(
				DefaultOverrideImplicitAliasMetaClass2.class).get(DefaultOverrideRoot.class);
		assertThat(annotation2.getString("text")).isEqualTo("alias-meta-2");
	}

	@Test // gh-22654
	void getValueWhenHasDefaultOverrideWithExplicitAlias() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				DefaultOverrideExplicitAliasRootMetaMetaClass.class).get(
						DefaultOverrideExplicitAliasRoot.class);
		assertThat(annotation.getString("text")).isEqualTo("meta");
		assertThat(annotation.getString("value")).isEqualTo("meta");
	}

	@Test // gh-22703
	void getValueWhenThreeDeepMetaWithValue() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				ValueAttributeMetaMetaClass.class).get(ValueAttribute.class);
		assertThat(annotation.getStringArray(MergedAnnotation.VALUE)).containsExactly(
				"FromValueAttributeMeta");
	}

	@Test
	void asAnnotationAttributesReturnsPopulatedAnnotationAttributes() {
		MergedAnnotation<?> annotation = MergedAnnotations.from(
				SpringApplicationConfigurationClass.class).get(
						SpringApplicationConfiguration.class);
		AnnotationAttributes attributes = annotation.asAnnotationAttributes(
				Adapt.CLASS_TO_STRING);
		assertThat(attributes).containsEntry("classes", new String[] { Number.class.getName() });
		assertThat(attributes.annotationType()).isEqualTo(SpringApplicationConfiguration.class);
	}

	// @formatter:off

	@Retention(RetentionPolicy.RUNTIME)
	@Target({ ElementType.TYPE, ElementType.METHOD })
	@Inherited
	@interface Transactional {

		String value() default "";

		String qualifier() default "transactionManager";

		boolean readOnly() default false;
	}

	@Transactional
	@Component
	@Retention(RetentionPolicy.RUNTIME)
	@interface TransactionalComponent {
	}

	@TransactionalComponent
	@Retention(RetentionPolicy.RUNTIME)
	@interface ComposedTransactionalComponent {
	}

	static class NonAnnotatedClass {
	}

	@Component
	static class AnnotatedClass {

		class NonAnnotatedInnerClass {
		}

		static class NonAnnotatedStaticNestedClass {
		}
	}

	static interface NonAnnotatedInterface {
	}

	@TransactionalComponent
	static class TransactionalComponentClass {
	}

	static class SubTransactionalComponentClass extends TransactionalComponentClass {
	}

	@ComposedTransactionalComponent
	static class ComposedTransactionalComponentClass {
	}

	@AliasedTransactionalComponent
	static class AliasedTransactionalComponentClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@Target({ ElementType.TYPE, ElementType.METHOD })
	@Inherited
	@interface AliasedTransactional {

		@AliasFor(attribute = "qualifier")
		String value() default "";

		@AliasFor(attribute = "value")
		String qualifier() default "";
	}

	@Transactional(qualifier = "composed1")
	@Retention(RetentionPolicy.RUNTIME)
	@Target(ElementType.TYPE)
	@Inherited
	@interface InheritedComposed {
	}

	@Transactional(qualifier = "composed2", readOnly = true)
	@Retention(RetentionPolicy.RUNTIME)
	@Target(ElementType.TYPE)
	@interface Composed {
	}

	@Transactional
	@Retention(RetentionPolicy.RUNTIME)
	@interface TxComposedWithOverride {

		String qualifier() default "txMgr";
	}

	@Transactional("TxInheritedComposed")
	@Retention(RetentionPolicy.RUNTIME)
	@interface TxInheritedComposed {
	}

	@Transactional("TxComposed")
	@Retention(RetentionPolicy.RUNTIME)
	@interface TxComposed {
	}

	@AliasedTransactional(value = "aliasForQualifier")
	@Component
	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasedTransactionalComponent {
	}

	@AliasedTransactional
	@Retention(RetentionPolicy.RUNTIME)
	@interface MyAliasedTransactional {

		@AliasFor(annotation = AliasedTransactional.class, attribute = "value")
		String value() default "defaultTransactionManager";
	}

	@MyAliasedTransactional("anotherTransactionManager")
	@Retention(RetentionPolicy.RUNTIME)
	@Target({ElementType.TYPE, ElementType.METHOD})
	@interface ComposedMyAliasedTransactional {
	}

	@ComposedMyAliasedTransactional
	static class ComposedTransactionalClass {
	}

	@AliasedTransactional("meta")
	@Retention(RetentionPolicy.RUNTIME)
	@interface MetaAliasedTransactional {
	}

	@MetaAliasedTransactional
	@Retention(RetentionPolicy.RUNTIME)
	@interface MetaMetaAliasedTransactional {
	}

	@MetaMetaAliasedTransactional
	static class MetaMetaAliasedTransactionalClass {
	}

	@TxComposedWithOverride
	// Override default "txMgr" from @TxComposedWithOverride with "localTxMgr"
	@Transactional(qualifier = "localTxMgr")
	@Retention(RetentionPolicy.RUNTIME)
	@Target(ElementType.TYPE)
	@interface MetaAndLocalTxConfig {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface TestPropertySource {

		@AliasFor("locations")
		String[] value() default {};

		@AliasFor("value")
		String[] locations() default {};
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface ContextConfiguration {

		@AliasFor(attribute = "locations")
		String[] value() default {};

		@AliasFor(attribute = "value")
		String[] locations() default {};

		Class<?>[] classes() default {};
	}

	@ContextConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface ConventionBasedComposedContextConfiguration {

		String[] locations() default {};
	}

	@ContextConfiguration(value = "duplicateDeclaration")
	@Retention(RetentionPolicy.RUNTIME)
	@interface InvalidConventionBasedComposedContextConfiguration {

		String[] locations();
	}

	/**
	 * This hybrid approach for annotation attribute overrides with transitive implicit
	 * aliases is unsupported. See SPR-13554 for details.
	 */
	@ContextConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface HalfConventionBasedAndHalfAliasedComposedContextConfiguration {

		String[] locations() default {};

		@AliasFor(annotation = ContextConfiguration.class, attribute = "locations")
		String[] xmlConfigFiles() default {};
	}

	@ContextConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasedComposedContextConfiguration {

		@AliasFor(annotation = ContextConfiguration.class, attribute = "locations")
		String[] xmlConfigFiles();
	}

	@ContextConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasedValueComposedContextConfiguration {

		@AliasFor(annotation = ContextConfiguration.class, attribute = "value")
		String[] locations();
	}

	@ContextConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface ImplicitAliasesContextConfiguration {

		@AliasFor(annotation = ContextConfiguration.class, attribute = "locations")
		String[] groovyScripts() default {};

		@AliasFor(annotation = ContextConfiguration.class, attribute = "locations")
		String[] xmlFiles() default {};

		// intentionally omitted: attribute = "locations"
		@AliasFor(annotation = ContextConfiguration.class)
		String[] locations() default {};

		// intentionally omitted: attribute = "locations" (SPR-14069)
		@AliasFor(annotation = ContextConfiguration.class)
		String[] value() default {};
	}

	@ImplicitAliasesContextConfiguration(xmlFiles = { "A.xml", "B.xml" })
	@Retention(RetentionPolicy.RUNTIME)
	@interface ComposedImplicitAliasesContextConfiguration {
	}

	@ImplicitAliasesContextConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface TransitiveImplicitAliasesContextConfiguration {

		@AliasFor(annotation = ImplicitAliasesContextConfiguration.class, attribute = "xmlFiles")
		String[] xml() default {};

		@AliasFor(annotation = ImplicitAliasesContextConfiguration.class, attribute = "groovyScripts")
		String[] groovy() default {};
	}

	@ImplicitAliasesContextConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface SingleLocationTransitiveImplicitAliasesContextConfiguration {

		@AliasFor(annotation = ImplicitAliasesContextConfiguration.class, attribute = "xmlFiles")
		String xml() default "";

		@AliasFor(annotation = ImplicitAliasesContextConfiguration.class, attribute = "groovyScripts")
		String groovy() default "";
	}

	@ImplicitAliasesContextConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface TransitiveImplicitAliasesWithSkippedLevelContextConfiguration {

		@AliasFor(annotation = ContextConfiguration.class, attribute = "locations")
		String[] xml() default {};

		@AliasFor(annotation = ImplicitAliasesContextConfiguration.class, attribute = "groovyScripts")
		String[] groovy() default {};
	}

	@ImplicitAliasesContextConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface SingleLocationTransitiveImplicitAliasesWithSkippedLevelContextConfiguration {

		@AliasFor(annotation = ContextConfiguration.class, attribute = "locations")
		String xml() default "";

		@AliasFor(annotation = ImplicitAliasesContextConfiguration.class, attribute = "groovyScripts")
		String groovy() default "";
	}

	/**
	 * Although the configuration declares an explicit value for 'value' and requires a
	 * value for the aliased 'locations', this does not result in an error since
	 * 'locations' effectively shadows the 'value' attribute (which cannot be set via the
	 * composed annotation anyway). If 'value' were not shadowed, such a declaration would
	 * not make sense.
	 */
	@ContextConfiguration(value = "duplicateDeclaration")
	@Retention(RetentionPolicy.RUNTIME)
	@interface ShadowedAliasComposedContextConfiguration {

		@AliasFor(annotation = ContextConfiguration.class, attribute = "locations")
		String[] xmlConfigFiles();
	}

	@ContextConfiguration(locations = "shadowed.xml")
	@TestPropertySource(locations = "test.properties")
	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasedComposedContextConfigurationAndTestPropertySource {

		@AliasFor(annotation = ContextConfiguration.class, attribute = "locations")
		String[] xmlConfigFiles() default "default.xml";
	}

	@ContextConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface SpringApplicationConfiguration {

		@AliasFor(annotation = ContextConfiguration.class, attribute = "locations")
		String[] locations() default {};

		@AliasFor("value")
		Class<?>[] classes() default {};

		@AliasFor("classes")
		Class<?>[] value() default {};
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface ComponentScan {

		@AliasFor("basePackages")
		String[] value() default {};

		@AliasFor("value")
		String[] basePackages() default {};

		Filter[] excludeFilters() default {};
	}

	@Retention(RetentionPolicy.RUNTIME)
	@Target({})
	@interface Filter {

		String pattern();
	}

	@ComponentScan(excludeFilters = { @Filter(pattern = "*Test"),
		@Filter(pattern = "*Tests") })
	@Retention(RetentionPolicy.RUNTIME)
	@interface TestComponentScan {

		@AliasFor(attribute = "basePackages", annotation = ComponentScan.class)
		String[] packages();
	}

	@ComponentScan
	@Retention(RetentionPolicy.RUNTIME)
	@interface ConventionBasedSinglePackageComponentScan {

		String basePackages();
	}

	@ComponentScan
	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasForBasedSinglePackageComponentScan {

		@AliasFor(attribute = "basePackages", annotation = ComponentScan.class)
		String pkg();
	}

	@Transactional
	static class ClassWithInheritedAnnotation {
	}

	@Composed
	static class SubClassWithInheritedAnnotation extends ClassWithInheritedAnnotation {
	}

	static class SubSubClassWithInheritedAnnotation
			extends SubClassWithInheritedAnnotation {
	}

	@InheritedComposed
	static class ClassWithInheritedComposedAnnotation {
	}

	@Composed
	static class SubClassWithInheritedComposedAnnotation
			extends ClassWithInheritedComposedAnnotation {
	}

	static class SubSubClassWithInheritedComposedAnnotation
			extends SubClassWithInheritedComposedAnnotation {
	}

	@MetaAndLocalTxConfig
	static class MetaAndLocalTxConfigClass {
	}

	@Transactional("TxConfig")
	static class TxConfig {
	}

	@Transactional("DerivedTxConfig")
	static class DerivedTxConfig extends TxConfig {
	}

	@TxInheritedComposed
	@TxComposed
	static class TxFromMultipleComposedAnnotations {
	}

	@Transactional
	static interface InterfaceWithInheritedAnnotation {

		@Order
		void handleFromInterface();
	}

	static abstract class AbstractClassWithInheritedAnnotation<T>
			implements InterfaceWithInheritedAnnotation {

		@Transactional
		public abstract void handle();

		@Transactional
		public void handleParameterized(T t) {
		}
	}

	static class ConcreteClassWithInheritedAnnotation
			extends AbstractClassWithInheritedAnnotation<String> {

		@Override
		public void handle() {
		}

		@Override
		public void handleParameterized(String s) {
		}

		@Override
		public void handleFromInterface() {
		}
	}

	public interface GenericParameter<T> {

		T getFor(Class<T> cls);
	}

	@SuppressWarnings("unused")
	private static class StringGenericParameter implements GenericParameter<String> {

		@Order
		@Override
		public String getFor(Class<String> cls) {
			return "foo";
		}

		public String getFor(Integer integer) {
			return "foo";
		}
	}

	@Transactional
	public interface InheritedAnnotationInterface {
	}

	public interface SubInheritedAnnotationInterface
			extends InheritedAnnotationInterface {
	}

	public interface SubSubInheritedAnnotationInterface
			extends SubInheritedAnnotationInterface {
	}

	@Order
	public interface NonInheritedAnnotationInterface {
	}

	public interface SubNonInheritedAnnotationInterface
			extends NonInheritedAnnotationInterface {
	}

	public interface SubSubNonInheritedAnnotationInterface
			extends SubNonInheritedAnnotationInterface {
	}

	@ConventionBasedComposedContextConfiguration(locations = "explicitDeclaration")
	static class ConventionBasedComposedContextConfigurationClass {
	}

	@InvalidConventionBasedComposedContextConfiguration(locations = "requiredLocationsDeclaration")
	static class InvalidConventionBasedComposedContextConfigurationClass {
	}

	@HalfConventionBasedAndHalfAliasedComposedContextConfiguration(xmlConfigFiles = "explicitDeclaration")
	static class HalfConventionBasedAndHalfAliasedComposedContextConfigurationClass1 {
	}

	@HalfConventionBasedAndHalfAliasedComposedContextConfiguration(locations = "explicitDeclaration")
	static class HalfConventionBasedAndHalfAliasedComposedContextConfigurationClass2 {
	}

	@AliasedComposedContextConfiguration(xmlConfigFiles = "test.xml")
	static class AliasedComposedContextConfigurationClass {
	}

	@AliasedValueComposedContextConfiguration(locations = "test.xml")
	static class AliasedValueComposedContextConfigurationClass {
	}

	@ImplicitAliasesContextConfiguration("foo.xml")
	static class ImplicitAliasesContextConfigurationClass1 {
	}

	@ImplicitAliasesContextConfiguration(locations = "bar.xml")
	static class ImplicitAliasesContextConfigurationClass2 {
	}

	@ImplicitAliasesContextConfiguration(xmlFiles = "baz.xml")
	static class ImplicitAliasesContextConfigurationClass3 {
	}

	@TransitiveImplicitAliasesContextConfiguration(groovy = "test.groovy")
	static class TransitiveImplicitAliasesContextConfigurationClass {
	}

	@SingleLocationTransitiveImplicitAliasesContextConfiguration(groovy = "test.groovy")
	static class SingleLocationTransitiveImplicitAliasesContextConfigurationClass {
	}

	@TransitiveImplicitAliasesWithSkippedLevelContextConfiguration(xml = "test.xml")
	static class TransitiveImplicitAliasesWithSkippedLevelContextConfigurationClass {
	}

	@SingleLocationTransitiveImplicitAliasesWithSkippedLevelContextConfiguration(xml = "test.xml")
	static class SingleLocationTransitiveImplicitAliasesWithSkippedLevelContextConfigurationClass {
	}

	@ComposedImplicitAliasesContextConfiguration
	static class ComposedImplicitAliasesContextConfigurationClass {
	}

	@ShadowedAliasComposedContextConfiguration(xmlConfigFiles = "test.xml")
	static class ShadowedAliasComposedContextConfigurationClass {
	}

	@AliasedComposedContextConfigurationAndTestPropertySource(xmlConfigFiles = "test.xml")
	static class AliasedComposedContextConfigurationAndTestPropertySourceClass {
	}

	@ComponentScan(value = "com.example.app.test", basePackages = "com.example.app.test")
	static class ComponentScanWithBasePackagesAndValueAliasClass {
	}

	@TestComponentScan(packages = "com.example.app.test")
	static class TestComponentScanClass {
	}

	@ConventionBasedSinglePackageComponentScan(basePackages = "com.example.app.test")
	static class ConventionBasedSinglePackageComponentScanClass {
	}

	@AliasForBasedSinglePackageComponentScan(pkg = "com.example.app.test")
	static class AliasForBasedSinglePackageComponentScanClass {
	}

	@SpringApplicationConfiguration(Number.class)
	static class SpringApplicationConfigurationClass {
	}

	@Resource(name = "x")
	static class ResourceHolder {
	}

	interface TransactionalService {

		@Transactional
		void doIt();
	}

	class TransactionalServiceImpl implements TransactionalService {

		@Override
		public void doIt() {
		}
	}

	@Component("meta1")
	@Order
	@Retention(RetentionPolicy.RUNTIME)
	@Inherited
	@interface Meta1 {
	}

	@Component("meta2")
	@Transactional(readOnly = true)
	@Retention(RetentionPolicy.RUNTIME)
	@interface Meta2 {
	}

	@Meta2
	@Retention(RetentionPolicy.RUNTIME)
	@interface MetaMeta {
	}

	@MetaMeta
	@Retention(RetentionPolicy.RUNTIME)
	@interface MetaMetaMeta {
	}

	@MetaCycle3
	@Retention(RetentionPolicy.RUNTIME)
	@interface MetaCycle1 {
	}

	@MetaCycle1
	@Retention(RetentionPolicy.RUNTIME)
	@interface MetaCycle2 {
	}

	@MetaCycle2
	@Retention(RetentionPolicy.RUNTIME)
	@interface MetaCycle3 {
	}

	@Meta1
	interface InterfaceWithMetaAnnotation {
	}

	@Meta2
	static class ClassWithLocalMetaAnnotationAndMetaAnnotatedInterface
			implements InterfaceWithMetaAnnotation {
	}

	@Meta1
	static class ClassWithInheritedMetaAnnotation {
	}

	@Meta2
	static class SubClassWithInheritedMetaAnnotation
			extends ClassWithInheritedMetaAnnotation {
	}

	static class SubSubClassWithInheritedMetaAnnotation
			extends SubClassWithInheritedMetaAnnotation {
	}

	@MetaMeta
	static class MetaMetaAnnotatedClass {
	}

	@MetaMetaMeta
	static class MetaMetaMetaAnnotatedClass {
	}

	@MetaCycle3
	static class MetaCycleAnnotatedClass {
	}

	interface AnnotatedInterface {

		@Order(0)
		void fromInterfaceImplementedByRoot();
	}

	interface NullableAnnotatedInterface {

		@Nullable
		void fromInterfaceImplementedByRoot();
	}

	static class Root implements AnnotatedInterface {

		@Order(27)
		public void annotatedOnRoot() {
		}

		@Meta1
		public void metaAnnotatedOnRoot() {
		}

		public void overrideToAnnotate() {
		}

		@Order(27)
		public void overrideWithoutNewAnnotation() {
		}

		public void notAnnotated() {
		}

		@Override
		public void fromInterfaceImplementedByRoot() {
		}
	}

	public static class Leaf extends Root {

		@Order(25)
		public void annotatedOnLeaf() {
		}

		@Meta1
		public void metaAnnotatedOnLeaf() {
		}

		@MetaMeta
		public void metaMetaAnnotatedOnLeaf() {
		}

		@Override
		@Order(1)
		public void overrideToAnnotate() {
		}

		@Override
		public void overrideWithoutNewAnnotation() {
		}
	}

	public static abstract class SimpleGeneric<T> {

		@Order(1)
		public abstract void something(T arg);

	}

	public static class TransactionalStringGeneric extends SimpleGeneric<String> {

		@Override
		@Transactional
		public void something(final String arg) {
		}
	}

	@Transactional
	public static class InheritedAnnotationClass {
	}

	public static class SubInheritedAnnotationClass extends InheritedAnnotationClass {
	}

	@Order
	public static class NonInheritedAnnotationClass {
	}

	public static class SubNonInheritedAnnotationClass
			extends NonInheritedAnnotationClass {
	}

	@Transactional
	public static class TransactionalClass {
	}

	@Order
	public static class TransactionalAndOrderedClass extends TransactionalClass {
	}

	public static class SubTransactionalAndOrderedClass
			extends TransactionalAndOrderedClass {
	}

	public interface InterfaceWithAnnotatedMethod {

		@Order
		void foo();
	}

	public static class ImplementsInterfaceWithAnnotatedMethod
			implements InterfaceWithAnnotatedMethod {

		@Override
		public void foo() {
		}
	}

	public static class SubOfImplementsInterfaceWithAnnotatedMethod
			extends ImplementsInterfaceWithAnnotatedMethod {

		@Override
		public void foo() {
		}
	}

	public abstract static class AbstractDoesNotImplementInterfaceWithAnnotatedMethod
			implements InterfaceWithAnnotatedMethod {
	}

	public static class SubOfAbstractImplementsInterfaceWithAnnotatedMethod
			extends AbstractDoesNotImplementInterfaceWithAnnotatedMethod {

		@Override
		public void foo() {
		}
	}

	public interface InterfaceWithGenericAnnotatedMethod<T> {

		@Order
		void foo(T t);
	}

	public static class ImplementsInterfaceWithGenericAnnotatedMethod
			implements InterfaceWithGenericAnnotatedMethod<String> {

		@Override
		public void foo(String t) {
		}
	}

	public static abstract class BaseClassWithGenericAnnotatedMethod<T> {

		@Order
		abstract void foo(T t);
	}

	public static class ExtendsBaseClassWithGenericAnnotatedMethod
			extends BaseClassWithGenericAnnotatedMethod<String> {

		@Override
		public void foo(String t) {
		}
	}

	@Retention(RetentionPolicy.RUNTIME)
	@Inherited
	@interface MyRepeatableContainer {

		MyRepeatable[] value();
	}

	@Retention(RetentionPolicy.RUNTIME)
	@Inherited
	@Repeatable(MyRepeatableContainer.class)
	@interface MyRepeatable {

		String value();
	}

	@Retention(RetentionPolicy.RUNTIME)
	@Inherited
	@MyRepeatable("meta1")
	@interface MyRepeatableMeta1 {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@Inherited
	@MyRepeatable("meta2")
	@interface MyRepeatableMeta2 {
	}

	interface InterfaceWithRepeated {

		@MyRepeatable("A")
		@MyRepeatableContainer({ @MyRepeatable("B"), @MyRepeatable("C") })
		@MyRepeatableMeta1
		void foo();
	}

	@MyRepeatable("A")
	@MyRepeatableContainer({ @MyRepeatable("B"), @MyRepeatable("C") })
	@MyRepeatableMeta1
	static class MyRepeatableClass {
	}

	static class SubMyRepeatableClass extends MyRepeatableClass {
	}

	@MyRepeatable("X")
	@MyRepeatableContainer({ @MyRepeatable("Y"), @MyRepeatable("Z") })
	@MyRepeatableMeta2
	static class SubMyRepeatableWithAdditionalLocalDeclarationsClass
			extends MyRepeatableClass {
	}

	static class SubSubMyRepeatableWithAdditionalLocalDeclarationsClass
			extends SubMyRepeatableWithAdditionalLocalDeclarationsClass {
	}

	enum RequestMethod {
		GET, POST
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface RequestMapping {

		String name();

		@AliasFor("path")
		String[] value() default "";

		@AliasFor(attribute = "value")
		String[] path() default "";

		RequestMethod[] method() default {};
	}

	@Retention(RetentionPolicy.RUNTIME)
	@RequestMapping(method = RequestMethod.GET, name = "")
	@interface GetMapping {

		@AliasFor(annotation = RequestMapping.class)
		String value() default "";

		@AliasFor(annotation = RequestMapping.class)
		String path() default "";
	}

	@Retention(RetentionPolicy.RUNTIME)
	@RequestMapping(method = RequestMethod.POST, name = "")
	@interface PostMapping {

		String path() default "";
	}

	@Component("webController")
	static class WebController {

		@RequestMapping(value = "/test", name = "foo")
		public void handleMappedWithValueAttribute() {
		}

		@RequestMapping(path = "/test", name = "bar", method = { RequestMethod.GET,
			RequestMethod.POST })
		public void handleMappedWithPathAttribute() {
		}

		@GetMapping("/test")
		public void getMappedWithValueAttribute() {
		}

		@GetMapping(path = "/test")
		public void getMappedWithPathAttribute() {
		}

		@PostMapping(path = "/test")
		public void postMappedWithPathAttribute() {
		}

		@RequestMapping(value = "/test", path = "/test", name = "bar", method = {
			RequestMethod.GET, RequestMethod.POST })
		public void handleMappedWithSamePathAndValueAttributes() {
		}

		@RequestMapping(value = "/enigma", path = "/test", name = "baz")
		public void handleMappedWithDifferentPathAndValueAttributes() {
		}
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface TestConfiguration {

		@AliasFor("location")
		String value() default "";

		@AliasFor("value")
		String location() default "";

		Class<?> configClass() default Object.class;
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface Hierarchy {

		TestConfiguration[] value();
	}

	@Hierarchy({ @TestConfiguration("A"), @TestConfiguration(location = "B") })
	static class HierarchyClass {
	}

	@TestConfiguration("simple.xml")
	static class TestConfigurationClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface CharsContainer {

		@AliasFor(attribute = "chars")
		char[] value() default {};

		@AliasFor(attribute = "value")
		char[] chars() default {};
	}

	@CharsContainer(chars = { 'x', 'y', 'z' })
	static class GroupOfCharsClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasForWithMissingAttributeDeclaration {

		@AliasFor
		String foo() default "";
	}

	@AliasForWithMissingAttributeDeclaration
	static class AliasForWithMissingAttributeDeclarationClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasForWithDuplicateAttributeDeclaration {

		@AliasFor(value = "bar", attribute = "baz")
		String foo() default "";
	}

	@AliasForWithDuplicateAttributeDeclaration
	static class AliasForWithDuplicateAttributeDeclarationClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasForNonexistentAttribute {

		@AliasFor("bar")
		String foo() default "";
	}

	@AliasForNonexistentAttribute
	static class AliasForNonexistentAttributeClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasForWithoutMirroredAliasFor {

		@AliasFor("bar")
		String foo() default "";

		String bar() default "";
	}

	@AliasForWithoutMirroredAliasFor
	static class AliasForWithoutMirroredAliasForClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasForWithMirroredAliasForWrongAttribute {

		@AliasFor(attribute = "bar")
		String[] foo() default "";

		@AliasFor(attribute = "quux")
		String[] bar() default "";
	}

	@AliasForWithMirroredAliasForWrongAttribute
	static class AliasForWithMirroredAliasForWrongAttributeClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasForAttributeOfDifferentType {

		@AliasFor("bar")
		String[] foo() default "";

		@AliasFor("foo")
		boolean bar() default true;
	}

	@AliasForAttributeOfDifferentType
	static class AliasForAttributeOfDifferentTypeClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasForWithMissingDefaultValues {

		@AliasFor(attribute = "bar")
		String foo();

		@AliasFor(attribute = "foo")
		String bar();
	}

	@AliasForWithMissingDefaultValues(foo = "foo", bar = "bar")
	static class AliasForWithMissingDefaultValuesClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasForAttributeWithDifferentDefaultValue {

		@AliasFor("bar")
		String foo() default "X";

		@AliasFor("foo")
		String bar() default "Z";
	}

	@AliasForAttributeWithDifferentDefaultValue
	static class AliasForAttributeWithDifferentDefaultValueClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasedComposedTestConfigurationNotMetaPresent {

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String xmlConfigFile();
	}

	@AliasedComposedTestConfigurationNotMetaPresent(xmlConfigFile = "test.xml")
	static class AliasedComposedTestConfigurationNotMetaPresentClass {
	}

	@TestConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface AliasedComposedTestConfiguration {

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String xmlConfigFile();
	}

	@TestConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	public @interface ImplicitAliasesTestConfiguration {

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String xmlFile() default "";

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String groovyScript() default "";

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String value() default "";

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String location1() default "";

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String location2() default "";

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String location3() default "";

		@AliasFor(annotation = TestConfiguration.class, attribute = "configClass")
		Class<?> configClass() default Object.class;

		String nonAliasedAttribute() default "";
	}

	@ImplicitAliasesTestConfiguration(groovyScript = "groovyScript")
	static class GroovyImplicitAliasesSimpleTestConfigurationClass {
	}

	@ImplicitAliasesTestConfiguration(xmlFile = "xmlFile")
	static class XmlImplicitAliasesTestConfigurationClass {
	}

	@ImplicitAliasesTestConfiguration("value")
	static class ValueImplicitAliasesTestConfigurationClass {
	}

	@ImplicitAliasesTestConfiguration(location1 = "location1")
	static class Location1ImplicitAliasesTestConfigurationClass {
	}

	@ImplicitAliasesTestConfiguration(location2 = "location2")
	static class Location2ImplicitAliasesTestConfigurationClass {
	}

	@ImplicitAliasesTestConfiguration(location3 = "location3")
	static class Location3ImplicitAliasesTestConfigurationClass {
	}

	@TestConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface ImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration {

		@AliasFor(annotation = TestConfiguration.class)
		String value() default "";

		@AliasFor(annotation = TestConfiguration.class)
		String location() default "";

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String xmlFile() default "";
	}

	@ImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface TransitiveImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration {

		@AliasFor(annotation = ImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration.class, attribute = "xmlFile")
		String xml() default "";

		@AliasFor(annotation = ImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration.class, attribute = "location")
		String groovy() default "";
	}

	@ImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration("value")
	static class ValueImplicitAliasesWithImpliedAliasNamesOmittedTestConfigurationClass {
	}

	@ImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration(location = "location")
	static class LocationsImplicitAliasesWithImpliedAliasNamesOmittedTestConfigurationClass {
	}

	@ImplicitAliasesWithImpliedAliasNamesOmittedTestConfiguration(xmlFile = "xmlFile")
	static class XmlFilesImplicitAliasesWithImpliedAliasNamesOmittedTestConfigurationClass {
	}

	@TestConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface ImplicitAliasesWithMissingDefaultValuesTestConfiguration {

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String location1();

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String location2();
	}

	@ImplicitAliasesWithMissingDefaultValuesTestConfiguration(location1 = "1", location2 = "2")
	static class ImplicitAliasesWithMissingDefaultValuesTestConfigurationClass {
	}

	@TestConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface ImplicitAliasesWithDifferentDefaultValuesTestConfiguration {

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String location1() default "foo";

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String location2() default "bar";
	}

	@ImplicitAliasesWithDifferentDefaultValuesTestConfiguration(location1 = "1", location2 = "2")
	static class ImplicitAliasesWithDifferentDefaultValuesTestConfigurationClass {
	}

	@TestConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface ImplicitAliasesWithDuplicateValuesTestConfiguration {

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String location1() default "";

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String location2() default "";
	}

	@ImplicitAliasesWithDuplicateValuesTestConfiguration(location1 = "1", location2 = "2")
	static class ImplicitAliasesWithDuplicateValuesTestConfigurationClass {
	}

	@TestConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface ImplicitAliasesForAliasPairTestConfiguration {

		@AliasFor(annotation = TestConfiguration.class, attribute = "location")
		String xmlFile() default "";

		@AliasFor(annotation = TestConfiguration.class, value = "value")
		String groovyScript() default "";
	}

	@ImplicitAliasesForAliasPairTestConfiguration(xmlFile = "test.xml")
	static class ImplicitAliasesForAliasPairTestConfigurationClass {
	}

	@ImplicitAliasesTestConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface TransitiveImplicitAliasesTestConfiguration {

		@AliasFor(annotation = ImplicitAliasesTestConfiguration.class, attribute = "xmlFile")
		String xml() default "";

		@AliasFor(annotation = ImplicitAliasesTestConfiguration.class, attribute = "groovyScript")
		String groovy() default "";
	}

	@TransitiveImplicitAliasesTestConfiguration(xml = "test.xml")
	static class TransitiveImplicitAliasesTestConfigurationClass {
	}

	@ImplicitAliasesForAliasPairTestConfiguration
	@Retention(RetentionPolicy.RUNTIME)
	@interface TransitiveImplicitAliasesForAliasPairTestConfiguration {

		@AliasFor(annotation = ImplicitAliasesForAliasPairTestConfiguration.class, attribute = "xmlFile")
		String xml() default "";

		@AliasFor(annotation = ImplicitAliasesForAliasPairTestConfiguration.class, attribute = "groovyScript")
		String groovy() default "";
	}

	@TransitiveImplicitAliasesForAliasPairTestConfiguration(xml = "test.xml")
	static class TransitiveImplicitAliasesForAliasPairTestConfigurationClass {
	}

	@ComponentScan(excludeFilters = { @Filter(pattern = "*Foo"),
		@Filter(pattern = "*Bar") })
	static class ComponentScanClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface ComponentScanSingleFilter {

		Filter value();
	}

	@ComponentScanSingleFilter(@Filter(pattern = "*Foo"))
	static class ComponentScanSingleFilterClass {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AnnotationWithDefaults {

		String text() default "enigma";

		boolean predicate() default true;

		char[] characters() default { 'a', 'b', 'c' };
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface AnnotationWithoutDefaults {

		String text();
	}

	@TestConfiguration(value = "foo", location = "bar")
	interface TestConfigurationMismatch {
	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface DefaultOverrideRoot {

		String text() default "root";

	}

	@Retention(RetentionPolicy.RUNTIME)
	@DefaultOverrideRoot
	@interface DefaultOverrideMeta {

	}

	@Retention(RetentionPolicy.RUNTIME)
	@DefaultOverrideMeta
	@interface DefaultOverrideMetaMeta {

		String text() default "metameta";

	}

	@Retention(RetentionPolicy.RUNTIME)
	@DefaultOverrideMetaMeta
	@interface DefaultOverrideMetaMetaMeta {

	}

	@DefaultOverrideMetaMetaMeta
	static class DefaultOverrideClass {

	}

	@Retention(RetentionPolicy.RUNTIME)
	@DefaultOverrideRoot
	@interface DefaultOverrideImplicitAlias {

		@AliasFor(annotation=DefaultOverrideRoot.class, attribute="text")
		String text1() default "alias";

		@AliasFor(annotation=DefaultOverrideRoot.class, attribute="text")
		String text2() default "alias";

	}

	@Retention(RetentionPolicy.RUNTIME)
	@DefaultOverrideImplicitAlias(text1="alias-meta-1")
	@interface DefaultOverrideAliasImplicitMeta1 {

	}

	@Retention(RetentionPolicy.RUNTIME)
	@DefaultOverrideImplicitAlias(text2="alias-meta-2")
	@interface DefaultOverrideImplicitAliasMeta2 {

	}

	@DefaultOverrideAliasImplicitMeta1
	static class DefaultOverrideImplicitAliasMetaClass1 {

	}

	@DefaultOverrideImplicitAliasMeta2
	static class DefaultOverrideImplicitAliasMetaClass2 {

	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface DefaultOverrideExplicitAliasRoot {

		@AliasFor("value")
		String text() default "";

		@AliasFor("text")
		String value() default "";

	}

	@Retention(RetentionPolicy.RUNTIME)
	@DefaultOverrideExplicitAliasRoot("meta")
	@interface DefaultOverrideExplicitAliasRootMeta {

	}

	@Retention(RetentionPolicy.RUNTIME)
	@DefaultOverrideExplicitAliasRootMeta
	@interface DefaultOverrideExplicitAliasRootMetaMeta {

	}

	@DefaultOverrideExplicitAliasRootMetaMeta
	static class DefaultOverrideExplicitAliasRootMetaMetaClass {

	}

	@Retention(RetentionPolicy.RUNTIME)
	@interface ValueAttribute {

		String[] value();

	}

	@Retention(RetentionPolicy.RUNTIME)
	@ValueAttribute("FromValueAttributeMeta")
	@interface ValueAttributeMeta {

		String[] value() default {};

	}

	@Retention(RetentionPolicy.RUNTIME)
	@ValueAttributeMeta("FromValueAttributeMetaMeta")
	@interface ValueAttributeMetaMeta {

	}

	@ValueAttributeMetaMeta
	static class ValueAttributeMetaMetaClass {

	}
	// @formatter:on

}
