net.bytebuddy.build.DispatcherAnnotationPlugin Maven / Gradle / Ivy
/*
* Copyright 2014 - Present Rafael Winterhalter
*
* 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
*
* http://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 net.bytebuddy.build;
import net.bytebuddy.asm.MemberAttributeExtension;
import net.bytebuddy.description.method.MethodDescription;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.dynamic.ClassFileLocator;
import net.bytebuddy.dynamic.DynamicType;
import net.bytebuddy.implementation.attribute.AnnotationValueFilter;
import net.bytebuddy.implementation.attribute.MethodAttributeAppender;
import net.bytebuddy.utility.dispatcher.JavaDispatcher;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Type;
import static net.bytebuddy.matcher.ElementMatchers.*;
/**
* A plugin that adds a {@link net.bytebuddy.utility.dispatcher.JavaDispatcher.Proxied} annotation to any method of an
* enhanced type where the annotation is not set. This aids in supporting obfuscators that rename methods which
* makes reflection-based lookup by the proxy interface's name impossible.
*/
@HashCodeAndEqualsPlugin.Enhance
public class DispatcherAnnotationPlugin extends Plugin.ForElementMatcher implements MethodAttributeAppender.Factory, MethodAttributeAppender {
/**
* Creates a new dispatcher annotation plugin.
*/
public DispatcherAnnotationPlugin() {
super(isAnnotatedWith(JavaDispatcher.Proxied.class));
}
/**
* {@inheritDoc}
*/
public DynamicType.Builder apply(DynamicType.Builder builder, TypeDescription typeDescription, ClassFileLocator classFileLocator) {
return builder.visit(new MemberAttributeExtension.ForMethod()
.attribute(this)
.on(not(isAnnotatedWith(JavaDispatcher.Proxied.class)).and(isAbstract())));
}
/**
* {@inheritDoc}
*/
public void close() {
/* do nothing */
}
/**
* {@inheritDoc}
*/
public MethodAttributeAppender make(TypeDescription typeDescription) {
return this;
}
/**
* {@inheritDoc}
*/
public void apply(MethodVisitor methodVisitor, MethodDescription methodDescription, AnnotationValueFilter annotationValueFilter) {
AnnotationVisitor visitor = methodVisitor.visitAnnotation(Type.getDescriptor(JavaDispatcher.Proxied.class), true);
if (visitor != null) {
visitor.visit("value", methodDescription.getName());
visitor.visitEnd();
}
}
}