/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001-2002 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 "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 java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.tools.ant.BuildException;
import org.apache.tools.bzip2.CBZip2InputStream;
/**
* Expands a file that has been compressed with the BZIP2
* algorithm. Normally used to compress non-compressed archives such
* as TAR files.
*
* @author Magesh Umasankar
*
* @since Ant 1.5
*
* @ant.task category="packaging"
*/
public class BUnzip2 extends Unpack {
private static final String DEFAULT_EXTENSION = ".bz2";
protected String getDefaultExtension() {
return DEFAULT_EXTENSION;
}
protected void extract() {
if (source.lastModified() > dest.lastModified()) {
log("Expanding " + source.getAbsolutePath() + " to "
+ dest.getAbsolutePath());
FileOutputStream out = null;
CBZip2InputStream zIn = null;
FileInputStream fis = null;
BufferedInputStream bis = null;
try {
out = new FileOutputStream(dest);
fis = new FileInputStream(source);
bis = new BufferedInputStream(fis);
int b = bis.read();
if (b != 'B') {
throw new BuildException("Invalid bz2 file.", location);
}
b = bis.read();
if (b != 'Z') {
throw new BuildException("Invalid bz2 file.", location);
}
zIn = new CBZip2InputStream(bis);
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 bzip2 " + ioe.getMessage();
throw new BuildException(msg, ioe, location);
} finally {
if (bis != null) {
try {
bis.close();
} catch (IOException ioex) {}
}
if (fis != null) {
try {
fis.close();
} catch (IOException ioex) {}
}
if (out != null) {
try {
out.close();
} catch (IOException ioex) {}
}
if (zIn != null) {
try {
zIn.close();
} catch (IOException ioex) {}
}
}
}
}
}