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/*
* 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.type.classreading;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.springframework.asm.AnnotationVisitor;
import org.springframework.asm.MethodVisitor;
import org.springframework.asm.Opcodes;
import org.springframework.asm.Type;
import org.springframework.core.annotation.AnnotationAttributes;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.annotation.MergedAnnotations;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.core.type.MethodMetadata;
import org.springframework.lang.Nullable;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
/**
* ASM class visitor which looks for the class name and implemented types as
* well as for the annotations defined on the class, exposing them through
* the {@link org.springframework.core.type.AnnotationMetadata} interface.
*
* @author Juergen Hoeller
* @author Mark Fisher
* @author Costin Leau
* @author Phillip Webb
* @author Sam Brannen
* @since 2.5
* @deprecated As of Spring Framework 5.2, this class has been replaced by
* {@link SimpleAnnotationMetadataReadingVisitor} for internal use within the
* framework, but there is no public replacement for
* {@code AnnotationMetadataReadingVisitor}.
*/
@Deprecated
public class AnnotationMetadataReadingVisitor extends ClassMetadataReadingVisitor implements AnnotationMetadata {
@Nullable
protected final ClassLoader classLoader;
protected final Set annotationSet = new LinkedHashSet<>(4);
protected final Map> metaAnnotationMap = new LinkedHashMap<>(4);
/**
* Declared as a {@link LinkedMultiValueMap} instead of a {@link MultiValueMap}
* to ensure that the hierarchical ordering of the entries is preserved.
* @see AnnotationReadingVisitorUtils#getMergedAnnotationAttributes
*/
protected final LinkedMultiValueMap attributesMap = new LinkedMultiValueMap<>(4);
protected final Set methodMetadataSet = new LinkedHashSet<>(4);
public AnnotationMetadataReadingVisitor(@Nullable ClassLoader classLoader) {
this.classLoader = classLoader;
}
@Override
public MergedAnnotations getAnnotations() {
throw new UnsupportedOperationException();
}
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
// Skip bridge methods - we're only interested in original annotation-defining user methods.
// On JDK 8, we'd otherwise run into double detection of the same annotated method...
if ((access & Opcodes.ACC_BRIDGE) != 0) {
return super.visitMethod(access, name, desc, signature, exceptions);
}
return new MethodMetadataReadingVisitor(name, access, getClassName(),
Type.getReturnType(desc).getClassName(), this.classLoader, this.methodMetadataSet);
}
@Override
@Nullable
public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
if (!visible) {
return null;
}
String className = Type.getType(desc).getClassName();
if (AnnotationUtils.isInJavaLangAnnotationPackage(className)) {
return null;
}
this.annotationSet.add(className);
return new AnnotationAttributesReadingVisitor(
className, this.attributesMap, this.metaAnnotationMap, this.classLoader);
}
@Override
public Set getAnnotationTypes() {
return this.annotationSet;
}
@Override
public Set getMetaAnnotationTypes(String annotationName) {
Set metaAnnotationTypes = this.metaAnnotationMap.get(annotationName);
return (metaAnnotationTypes != null ? metaAnnotationTypes : Collections.emptySet());
}
@Override
public boolean hasMetaAnnotation(String metaAnnotationType) {
if (AnnotationUtils.isInJavaLangAnnotationPackage(metaAnnotationType)) {
return false;
}
Collection> allMetaTypes = this.metaAnnotationMap.values();
for (Set metaTypes : allMetaTypes) {
if (metaTypes.contains(metaAnnotationType)) {
return true;
}
}
return false;
}
@Override
public boolean isAnnotated(String annotationName) {
return (!AnnotationUtils.isInJavaLangAnnotationPackage(annotationName) &&
this.attributesMap.containsKey(annotationName));
}
@Override
public boolean hasAnnotation(String annotationName) {
return getAnnotationTypes().contains(annotationName);
}
@Override
@Nullable
public AnnotationAttributes getAnnotationAttributes(String annotationName, boolean classValuesAsString) {
AnnotationAttributes raw = AnnotationReadingVisitorUtils.getMergedAnnotationAttributes(
this.attributesMap, this.metaAnnotationMap, annotationName);
if (raw == null) {
return null;
}
return AnnotationReadingVisitorUtils.convertClassValues(
"class '" + getClassName() + "'", this.classLoader, raw, classValuesAsString);
}
@Override
@Nullable
public MultiValueMap getAllAnnotationAttributes(String annotationName, boolean classValuesAsString) {
MultiValueMap allAttributes = new LinkedMultiValueMap<>();
List attributes = this.attributesMap.get(annotationName);
if (attributes == null) {
return null;
}
for (AnnotationAttributes raw : attributes) {
for (Map.Entry entry : AnnotationReadingVisitorUtils.convertClassValues(
"class '" + getClassName() + "'", this.classLoader, raw, classValuesAsString).entrySet()) {
allAttributes.add(entry.getKey(), entry.getValue());
}
}
return allAttributes;
}
@Override
public boolean hasAnnotatedMethods(String annotationName) {
for (MethodMetadata methodMetadata : this.methodMetadataSet) {
if (methodMetadata.isAnnotated(annotationName)) {
return true;
}
}
return false;
}
@Override
public Set getAnnotatedMethods(String annotationName) {
Set annotatedMethods = new LinkedHashSet<>(4);
for (MethodMetadata methodMetadata : this.methodMetadataSet) {
if (methodMetadata.isAnnotated(annotationName)) {
annotatedMethods.add(methodMetadata);
}
}
return annotatedMethods;
}
}
