| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 1999 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Ant", and "Apache Software |
| * Foundation" must not be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| package org.apache.tools.ant.taskdefs; |
| |
| import org.apache.tools.ant.*; |
| |
| import java.io.*; |
| import java.util.zip.*; |
| |
| /** |
| * Expands a file that has been compressed with the GZIP |
| * algorightm. Normally used to compress non-compressed archives such |
| * as TAR files. |
| * |
| * @author <a href="mailto:stefan.bodewig@epost.de">Stefan Bodewig</a> |
| */ |
| |
| public class GUnzip extends Task { |
| |
| private File source; |
| private File dest; |
| |
| public void setSrc(String src) { |
| source = project.resolveFile(src); |
| } |
| |
| public void setDest(String dest) { |
| this.dest = project.resolveFile(dest); |
| } |
| |
| public void execute() throws BuildException { |
| if (source == null) { |
| throw new BuildException("No source for gunzip specified", location); |
| } |
| |
| if (!source.exists()) { |
| throw new BuildException("source doesn't exist", location); |
| } |
| |
| if (source.isDirectory()) { |
| throw new BuildException("Cannot expand a directory", location); |
| } |
| |
| if (dest == null) { |
| dest = new File(source.getParent()); |
| } |
| |
| if (dest.isDirectory()) { |
| String sourceName = source.getName(); |
| int len = sourceName.length(); |
| if (len > 3 |
| && ".gz".equalsIgnoreCase(sourceName.substring(len-3))) { |
| dest = new File(dest, sourceName.substring(0, len-3)); |
| } else { |
| dest = new File(dest, sourceName); |
| } |
| } |
| |
| if (source.lastModified() > dest.lastModified()) { |
| log("Expanding "+ source.getAbsolutePath() + " to " |
| + dest.getAbsolutePath()); |
| |
| FileOutputStream out = null; |
| GZIPInputStream zIn = null; |
| try { |
| out = new FileOutputStream(dest); |
| zIn = new GZIPInputStream(new FileInputStream(source)); |
| byte[] buffer = new byte[8 * 1024]; |
| int count = 0; |
| do { |
| out.write(buffer, 0, count); |
| count = zIn.read(buffer, 0, buffer.length); |
| } while (count != -1); |
| } catch (IOException ioe) { |
| String msg = "Problem expanding gzip " + ioe.getMessage(); |
| throw new BuildException(msg, ioe, location); |
| } finally { |
| if (out != null) { |
| try { |
| out.close(); |
| } catch (IOException ioex) {} |
| } |
| if (zIn != null) { |
| try { |
| zIn.close(); |
| } catch (IOException ioex) {} |
| } |
| } |
| } |
| } |
| } |