org.codehaus.plexus.archiver.gzip.GZipUnArchiver Maven / Gradle / Ivy
/**
*
* 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.
*/
package org.codehaus.plexus.archiver.gzip;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;
import org.codehaus.plexus.archiver.AbstractUnArchiver;
import org.codehaus.plexus.archiver.ArchiverException;
import org.codehaus.plexus.archiver.util.Streams;
import static org.codehaus.plexus.archiver.util.Streams.copyFully;
import static org.codehaus.plexus.archiver.util.Streams.fileInputStream;
import static org.codehaus.plexus.archiver.util.Streams.fileOutputStream;
/**
* @author Emmanuel Venisse
*/
public class GZipUnArchiver
extends AbstractUnArchiver
{
private static final String OPERATION_GZIP = "gzip";
public GZipUnArchiver()
{
}
public GZipUnArchiver( File sourceFile )
{
super( sourceFile );
}
@Override
protected void execute()
throws ArchiverException
{
if ( getSourceFile().lastModified() > getDestFile().lastModified() )
{
getLogger().info( "Expanding " + getSourceFile().getAbsolutePath() + " to "
+ getDestFile().getAbsolutePath() );
copyFully( getGzipInputStream( fileInputStream( getSourceFile(), OPERATION_GZIP ) ),
fileOutputStream( getDestFile(), OPERATION_GZIP ), OPERATION_GZIP );
}
}
private InputStream getGzipInputStream( FileInputStream in )
throws ArchiverException
{
try
{
return Streams.bufferedInputStream( new GZIPInputStream( in ) );
}
catch ( IOException e )
{
throw new ArchiverException( "Problem creating GZIP input stream", e );
}
}
@Override
protected void execute( String path, File outputDirectory )
{
throw new UnsupportedOperationException( "Targeted extraction not supported in GZIP format." );
}
}