/*
* Copyright 2013 Google Inc. All Rights Reserved.
* 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 com.google.appengine.tck.transformers;
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.security.ProtectionDomain;
import java.util.Map;
/**
* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
*/
public class MultipleTransformer implements ClassFileTransformer {
private MatchingClassFileTransformer defaultFileTransformer;
private Map<String, ClassFileTransformer> transformers;
public MultipleTransformer(MatchingClassFileTransformer defaultFileTransformer, Map<String, ClassFileTransformer> transformers) {
this.defaultFileTransformer = defaultFileTransformer;
this.transformers = transformers;
}
public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
ClassFileTransformer transformer = transformers.get(className);
if (transformer != null) {
return transformer.transform(loader, className, classBeingRedefined, protectionDomain, classfileBuffer);
}
if (defaultFileTransformer != null && defaultFileTransformer.match(className)) {
return defaultFileTransformer.transform(loader, className, classBeingRedefined, protectionDomain, classfileBuffer);
}
return classfileBuffer;
}
}