1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 20 // 21 // This source code implements specifications defined by the Java 22 // Community Process. In order to remain compliant with the specification 23 // DO NOT add/change/or delete method signatures! 24 // 25 26 package javax.persistence.spi; 27 28 import java.security.ProtectionDomain; 29 import java.lang.instrument.IllegalClassFormatException; 30 31 /** 32 * @version $Rev: 467742 $ $Date: 2006-10-25 12:30:38 -0700 (Wed, 25 Oct 2006) $ 33 */ 34 public interface ClassTransformer { 35 /** 36 * Invoked when a class is being loaded or redefined. The implementation of this 37 * method may transform the supplied class file and return a new replacement class 38 * file. 39 * 40 * @param loader The defining loader of the class to be transformed, may be null if 41 * the bootstrap loader 42 * @param className The name of the class in the internal form of fully qualified 43 * class and interface names 44 * @param classBeingRedefined If this is a redefine, the class being redefined, 45 * otherwise null 46 * @param protectionDomain The protection domain of the class being defined or 47 * redefined 48 * @param classfileBuffer The input byte buffer in class file format - must not be 49 * modified 50 * @return A well-formed class file buffer (the result of the transform), or null if 51 * no transform is performed 52 * @throws java.lang.instrument.IllegalClassFormatException 53 * If the input does not represent a well-formed 54 * class file 55 */ 56 byte[] transform( 57 ClassLoader loader, 58 String className, 59 Class<?> classBeingRedefined, 60 ProtectionDomain protectionDomain, 61 byte[] classfileBuffer) throws IllegalClassFormatException; 62 63 }