| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Ant", and "Apache Software |
| * Foundation" must not be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.tools.ant.taskdefs.optional.depend; |
| |
| import java.util.zip.*; |
| import java.io.*; |
| |
| /** |
| * A class file iterator which iterates through the contents of a Java jar file. |
| * |
| * @author Conor MacNeill |
| */ |
| public class JarFileIterator implements ClassFileIterator { |
| private ZipInputStream jarStream; |
| |
| public JarFileIterator(InputStream stream) throws IOException { |
| super(); |
| |
| jarStream = new ZipInputStream(stream); |
| } |
| |
| private byte[] getEntryBytes(InputStream stream) throws IOException { |
| byte[] buffer = new byte[8192]; |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(2048); |
| int n; |
| |
| while ((n = stream.read(buffer, 0, buffer.length)) != -1) { |
| baos.write(buffer, 0, n); |
| } |
| |
| return baos.toByteArray(); |
| } |
| |
| public ClassFile getNextClassFile() { |
| ZipEntry jarEntry; |
| ClassFile nextElement = null; |
| |
| try { |
| jarEntry = jarStream.getNextEntry(); |
| |
| |
| while (nextElement == null && jarEntry != null) { |
| String entryName = jarEntry.getName(); |
| |
| if (!jarEntry.isDirectory() && entryName.endsWith(".class")) { |
| |
| // create a data input stream from the jar input stream |
| ClassFile javaClass = new ClassFile(); |
| |
| javaClass.read(jarStream); |
| |
| nextElement = javaClass; |
| } else { |
| |
| jarEntry = jarStream.getNextEntry(); |
| } |
| } |
| } catch (IOException e) { |
| String message = e.getMessage(); |
| String text = e.getClass().getName(); |
| |
| if (message != null) { |
| text += ": " + message; |
| } |
| |
| throw new RuntimeException("Problem reading JAR file: " + text); |
| } |
| |
| return nextElement; |
| } |
| |
| } |
| |