Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.commons.compress.archivers.jar; import java.io.IOException; import java.io.OutputStream; import org.apache.commons.compress.archivers.ArchiveEntry; import org.apache.commons.compress.archivers.zip.JarMarker; import org.apache.commons.compress.archivers.zip.ZipArchiveEntry; import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream; /** * Subclass that adds a special extra field to the very first entry * which allows the created archive to be used as an executable jar on * Solaris. * * @NotThreadSafe */ public class JarArchiveOutputStream extends ZipArchiveOutputStream { private boolean jarMarkerAdded = false; public JarArchiveOutputStream(final OutputStream out) { super(out); } // @throws ClassCastException if entry is not an instance of ZipArchiveEntry public void putArchiveEntry(ArchiveEntry ze) throws IOException { if (!jarMarkerAdded) { ((ZipArchiveEntry) ze).addAsFirstExtraField(JarMarker.getInstance()); jarMarkerAdded = true; } super.putArchiveEntry(ze); } }