/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
//
// This source code implements specifications defined by the Java
// Community Process. In order to remain compliant with the specification
// DO NOT add/change/or delete method signatures!
//
package javax.persistence.spi;
import java.security.ProtectionDomain;
import java.lang.instrument.IllegalClassFormatException;
/**
* @version $Rev$ $Date$
*/
public interface ClassTransformer {
/**
* Invoked when a class is being loaded or redefined. The implementation of this
* method may transform the supplied class file and return a new replacement class
* file.
*
* @param loader The defining loader of the class to be transformed, may be null if
* the bootstrap loader
* @param className The name of the class in the internal form of fully qualified
* class and interface names
* @param classBeingRedefined If this is a redefine, the class being redefined,
* otherwise null
* @param protectionDomain The protection domain of the class being defined or
* redefined
* @param classfileBuffer The input byte buffer in class file format - must not be
* modified
* @return A well-formed class file buffer (the result of the transform), or null if
* no transform is performed
* @throws java.lang.instrument.IllegalClassFormatException
* If the input does not represent a well-formed
* class file
*/
byte[] transform(
ClassLoader loader,
String className,
Class<?> classBeingRedefined,
ProtectionDomain protectionDomain,
byte[] classfileBuffer) throws IllegalClassFormatException;
}