org.apache.tools.ant.taskdefs.BZip2 Maven / Gradle / Ivy
/*
* 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.tools.ant.taskdefs;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.util.FileUtils;
import org.apache.tools.bzip2.CBZip2OutputStream;
/**
* Compresses a file with the BZIP2 algorithm. Normally used to compress
* non-compressed archives such as TAR files.
*
* @since Ant 1.5
*
* @ant.task category="packaging"
*/
public class BZip2 extends Pack {
/**
* Compress the zipFile.
*/
protected void pack() {
CBZip2OutputStream zOut = null;
try {
BufferedOutputStream bos =
new BufferedOutputStream(new FileOutputStream(zipFile));
bos.write('B');
bos.write('Z');
zOut = new CBZip2OutputStream(bos);
zipResource(getSrcResource(), zOut);
} catch (IOException ioe) {
String msg = "Problem creating bzip2 " + ioe.getMessage();
throw new BuildException(msg, ioe, getLocation());
} finally {
FileUtils.close(zOut);
}
}
/**
* Whether this task can deal with non-file resources.
*
* This implementation returns true only if this task is
* <bzip2>. Any subclass of this class that also wants to
* support non-file resources needs to override this method. We
* need to do so for backwards compatibility reasons since we
* can't expect subclasses to support resources.
* @return true if this task support non file resources.
* @since Ant 1.7
*/
protected boolean supportsNonFileResources() {
return getClass().equals(BZip2.class);
}
}