001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.commons.compress.archivers.jar; 020 021import java.io.IOException; 022import java.io.OutputStream; 023 024import org.apache.commons.compress.archivers.zip.JarMarker; 025import org.apache.commons.compress.archivers.zip.ZipArchiveEntry; 026import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream; 027 028/** 029 * Subclass that adds a special extra field to the very first entry 030 * which allows the created archive to be used as an executable jar on 031 * Solaris. 032 * 033 * @NotThreadSafe 034 */ 035public class JarArchiveOutputStream extends ZipArchiveOutputStream { 036 037 private boolean jarMarkerAdded; 038 039 public JarArchiveOutputStream(final OutputStream out) { 040 super(out); 041 } 042 043 /** 044 * Create and instance that wraps the output stream using the provided encoding. 045 * 046 * @param out the output stream to wrap 047 * @param encoding the encoding to use. Use null for the platform default. 048 * @since 1.10 049 */ 050 public JarArchiveOutputStream(final OutputStream out, final String encoding) { 051 super(out); 052 setEncoding(encoding); 053 } 054 055 // @throws ClassCastException if entry is not an instance of ZipArchiveEntry 056 @Override 057 public void putArchiveEntry(final ZipArchiveEntry entry) throws IOException { 058 if (!jarMarkerAdded) { 059 entry.addAsFirstExtraField(JarMarker.getInstance()); 060 jarMarkerAdded = true; 061 } 062 super.putArchiveEntry(entry); 063 } 064}