| /* ClassFileTransformer.java -- Implementation of this interface is used by an agent to |
| transform class files. |
| Copyright (C) 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package java.lang.instrument; |
| |
| import java.security.ProtectionDomain; |
| |
| /** |
| * This interface should be implemented by classes wishing to transform |
| * classes bytecode when defining or redefining classes. |
| * |
| * @author Nicolas Geoffray (nicolas.geoffray@menlina.com) |
| * @see Instrumentation |
| * @see Instrumentation#addTransformer(java.lang.instrument.ClassFileTransformer) |
| * @see Instrumentation#removeTransformer(java.lang.instrument.ClassFileTransformer) |
| * @since 1.5 |
| */ |
| public interface ClassFileTransformer |
| { |
| |
| /** |
| * Implementation of this method transforms a class by redefining its |
| * bytecodes. Once a ClassFileTransformer object registers itself to the |
| * Instrumentation object, this method will be called each time a class is |
| * defined (<code>ClassLoader.defineClass</code>) or redefined |
| * (<code>Instrumentation.redefineClasses</code>) |
| * @param loader the loader of the class |
| * @param className the name of the class with packages separated with "/" |
| * @param classBeingRedefined the class being redefined if it's the case, |
| * null otherwise |
| * @param protectionDomain the protection domain of the class being defined or |
| * redefined |
| * @param classfileBuffer the input byte buffer in class file format |
| * |
| * @return a class file buffer or null when no transformation has been performed |
| * |
| * @throws IllegalClassFormatException if the byte buffer does not represent |
| * a well-formed class file |
| * @see Instrumentation#redefineClasses(java.lang.instrument.ClassDefinition[]) |
| * |
| */ |
| /* FIXME[GENERICS]: Class should be Class<?> */ |
| byte[] transform(ClassLoader loader, |
| String className, |
| Class classBeingRedefined, |
| ProtectionDomain protectionDomain, |
| byte[] classfileBuffer) |
| throws IllegalClassFormatException; |
| } |
| |