1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 package proguard.io; 22 23 import java.io.IOException; 24 import java.util.zip.*; 25 26 /** 27 * This DataEntryReader lets a given DataEntryReader read all data entries of 28 * the read jar/war/zip data entries. 29 * 30 * @author Eric Lafortune 31 */ 32 public class JarReader implements DataEntryReader 33 { 34 private final DataEntryReader dataEntryReader; 35 36 37 /** 38 * Creates a new JarReader. 39 */ JarReader(DataEntryReader dataEntryReader)40 public JarReader(DataEntryReader dataEntryReader) 41 { 42 this.dataEntryReader = dataEntryReader; 43 } 44 45 46 // Implementation for DataEntryReader. 47 read(DataEntry dataEntry)48 public void read(DataEntry dataEntry) throws IOException 49 { 50 ZipInputStream zipInputStream = new ZipInputStream(dataEntry.getInputStream()); 51 52 try 53 { 54 // Get all entries from the input jar. 55 while (true) 56 { 57 // Can we get another entry? 58 ZipEntry zipEntry = zipInputStream.getNextEntry(); 59 if (zipEntry == null) 60 { 61 break; 62 } 63 64 // Delegate the actual reading to the data entry reader. 65 dataEntryReader.read(new ZipDataEntry(dataEntry, 66 zipEntry, 67 zipInputStream)); 68 } 69 } 70 finally 71 { 72 dataEntry.closeInputStream(); 73 } 74 } 75 } 76