1 /** 2 * Copyright 2007 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.tonicsystems.jarjar.util; 18 19 import java.util.jar.JarEntry; 20 import java.util.jar.JarFile; 21 import java.util.jar.JarOutputStream; 22 import java.util.Enumeration; 23 import java.io.*; 24 import java.util.*; 25 26 public class StandaloneJarProcessor 27 { run(File from, File to, JarProcessor proc)28 public static void run(File from, File to, JarProcessor proc) throws IOException { 29 byte[] buf = new byte[0x2000]; 30 31 JarFile in = new JarFile(from); 32 final File tmpTo = File.createTempFile("jarjar", ".jar"); 33 JarOutputStream out = new JarOutputStream(new FileOutputStream(tmpTo)); 34 Set<String> entries = new HashSet<String>(); 35 try { 36 EntryStruct struct = new EntryStruct(); 37 Enumeration<JarEntry> e = in.entries(); 38 while (e.hasMoreElements()) { 39 JarEntry entry = e.nextElement(); 40 struct.name = entry.getName(); 41 struct.time = entry.getTime(); 42 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 43 IoUtil.pipe(in.getInputStream(entry), baos, buf); 44 struct.data = baos.toByteArray(); 45 if (proc.process(struct)) { 46 if (entries.add(struct.name)) { 47 entry = new JarEntry(struct.name); 48 entry.setTime(struct.time); 49 entry.setCompressedSize(-1); 50 out.putNextEntry(entry); 51 out.write(struct.data); 52 } else if (struct.name.endsWith("/")) { 53 // TODO(chrisn): log 54 } else { 55 throw new IllegalArgumentException("Duplicate jar entries: " + struct.name); 56 } 57 } 58 } 59 60 } 61 finally { 62 in.close(); 63 out.close(); 64 } 65 66 // delete the empty directories 67 IoUtil.copyZipWithoutEmptyDirectories(tmpTo, to); 68 tmpTo.delete(); 69 70 } 71 } 72