001 /* JarOutputStream.java - OutputStream for writing jar files 002 Copyright (C) 2000, 2004 Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 package java.util.jar; 039 040 import java.io.IOException; 041 import java.io.OutputStream; 042 import java.util.zip.ZipEntry; 043 import java.util.zip.ZipOutputStream; 044 045 /** 046 * OutputStream for writing jar files. 047 * A special ZipOutputStream that can take JarEntries and can have a optional 048 * Manifest as first entry. 049 * 050 * @author Mark Wielaard (mark@klomp.org) 051 */ 052 053 public class JarOutputStream extends ZipOutputStream 054 { 055 // Constructors 056 057 /** 058 * Creates a new JarOutputStream without a manifest entry. 059 * 060 * @param out the stream to create the new jar on 061 * @exception IOException if something unexpected happend 062 */ 063 public JarOutputStream(OutputStream out) throws IOException 064 { 065 this(out, null); 066 } 067 068 /** 069 * Creates a new JarOutputStream with a manifest entry. 070 * The manifest will be the first entry in the jar. 071 * 072 * @param out the stream to create the new jar on 073 * @param man the manifest that should be put in the jar file or null 074 * for no manifest entry 075 * @exception IOException if something unexpected happend 076 */ 077 public JarOutputStream(OutputStream out, Manifest man) throws IOException 078 { 079 super(out); 080 if (man != null) 081 writeManifest(man); 082 } 083 084 // Methods 085 086 /** 087 * Writes the manifest to a new JarEntry in this JarOutputStream with as 088 * name JarFile.MANIFEST_NAME. 089 * 090 * @param manifest the non null manifest to be written 091 * @exception IOException if something unexpected happend 092 */ 093 private void writeManifest(Manifest manifest) throws IOException 094 { 095 // Create a new Jar Entry for the Manifest 096 JarEntry entry = new JarEntry(JarFile.MANIFEST_NAME); 097 putNextEntry(entry); 098 manifest.write(this); 099 closeEntry(); 100 } 101 102 /** 103 * Prepares the JarOutputStream for writing the next entry. 104 * This implementation just calls <code>super.putNextEntry()</code>. 105 * 106 * @param entry The information for the next entry 107 * @exception IOException when some unexpected I/O exception occurred 108 */ 109 public void putNextEntry(ZipEntry entry) throws IOException 110 { 111 super.putNextEntry(entry); // XXX 112 } 113 }