package org.codehaus.plexus.archiver.bzip2;
/**
*
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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.
*/
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
import org.codehaus.plexus.archiver.AbstractUnArchiver;
import org.codehaus.plexus.archiver.ArchiverException;
import org.codehaus.plexus.util.IOUtil;
/**
* @author <a href="mailto:evenisse@codehaus.org">Emmanuel Venisse</a>
* @version $Revision$ $Date$
*/
public class BZip2UnArchiver
extends AbstractUnArchiver
{
public BZip2UnArchiver()
{
}
public BZip2UnArchiver( File sourceFile )
{
super( sourceFile );
}
protected void execute()
throws ArchiverException
{
if ( getSourceFile().lastModified() > getDestFile().lastModified() )
{
getLogger().info( "Expanding " + getSourceFile().getAbsolutePath() + " to "
+ getDestFile().getAbsolutePath() );
FileOutputStream out = null;
BZip2CompressorInputStream zIn = null;
FileInputStream fis = null;
BufferedInputStream bis = null;
try
{
out = new FileOutputStream( getDestFile() );
fis = new FileInputStream( getSourceFile() );
bis = new BufferedInputStream( fis );
zIn = getBZip2InputStream( bis );
if ( zIn == null )
{
throw new ArchiverException( getSourceFile().getAbsolutePath() + " is an invalid bz2 file." );
}
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 ArchiverException( msg, ioe );
}
finally
{
IOUtil.close( bis );
IOUtil.close( fis );
IOUtil.close( out );
IOUtil.close( zIn );
}
}
}
public static BZip2CompressorInputStream getBZip2InputStream( InputStream bis )
throws IOException
{
return new BZip2CompressorInputStream( bis );
}
protected void execute( String path, File outputDirectory )
{
throw new UnsupportedOperationException( "Targeted extraction not supported in BZIP2 format." );
}
}