169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal/* 269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Javassist, a Java-bytecode translator toolkit. 369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Copyright (C) 1999-2007 Shigeru Chiba. All Rights Reserved. 469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * The contents of this file are subject to the Mozilla Public License Version 669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 1.1 (the "License"); you may not use this file except in compliance with 769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * the License. Alternatively, the contents of this file may be used under 869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * the terms of the GNU Lesser General Public License Version 2.1 or later. 969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 1069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Software distributed under the License is distributed on an "AS IS" basis, 1169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 1269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * for the specific language governing rights and limitations under the 1369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * License. 1469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 1569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 1669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalpackage javassist; 1769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 1869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport java.io.*; 1969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport java.net.URL; 2069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport java.net.MalformedURLException; 2169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 2269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal/** 2369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * A <code>ByteArrayClassPath</code> contains bytes that is served as 2469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * a class file to a <code>ClassPool</code>. It is useful to convert 2569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * a byte array to a <code>CtClass</code> object. 2669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 2769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * <p>For example, if you want to convert a byte array <code>b</code> 2869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * into a <code>CtClass</code> object representing the class with a name 2969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * <code>classname</code>, then do as following: 3069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 3169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * <ul><pre> 3269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * ClassPool cp = ClassPool.getDefault(); 3369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * cp.insertClassPath(new ByteArrayClassPath(classname, b)); 3469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * CtClass cc = cp.get(classname); 3569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * </pre></ul> 3669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 3769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * <p>The <code>ClassPool</code> object <code>cp</code> uses the created 3869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * <code>ByteArrayClassPath</code> object as the source of the class file. 3969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 4069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * <p>A <code>ByteArrayClassPath</code> must be instantiated for every 4169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * class. It contains only a single class file. 4269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 4369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * @see javassist.ClassPath 4469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * @see ClassPool#insertClassPath(ClassPath) 4569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * @see ClassPool#appendClassPath(ClassPath) 4669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * @see ClassPool#makeClass(InputStream) 4769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 4869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalpublic class ByteArrayClassPath implements ClassPath { 4969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal protected String classname; 5069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal protected byte[] classfile; 5169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 5269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal /* 5369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Creates a <code>ByteArrayClassPath</code> containing the given 5469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * bytes. 5569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 5669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * @param name a fully qualified class name 5769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * @param classfile the contents of a class file. 5869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 5969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public ByteArrayClassPath(String name, byte[] classfile) { 6069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal this.classname = name; 6169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal this.classfile = classfile; 6269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 6369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 6469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal /** 6569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Closes this class path. 6669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 6769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public void close() {} 6869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 6969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public String toString() { 7069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return "byte[]:" + classname; 7169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 7269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 7369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal /** 7469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Opens the class file. 7569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 7669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public InputStream openClassfile(String classname) { 7769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal if(this.classname.equals(classname)) 7869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return new ByteArrayInputStream(classfile); 7969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal else 8069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return null; 8169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 8269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 8369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal /** 8469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Obtains the URL. 8569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 8669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public URL find(String classname) { 8769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal if(this.classname.equals(classname)) { 8869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal String cname = classname.replace('.', '/') + ".class"; 8969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal try { 9069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal // return new File(cname).toURL(); 9169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return new URL("file:/ByteArrayClassPath/" + cname); 9269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 9369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal catch (MalformedURLException e) {} 9469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 9569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 9669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return null; 9769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 9869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal} 99