/*
* Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved.
*
* Project and contact information: http://www.cascading.org/
*
* This file is part of the Cascading project.
*
* 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 cascading.tap.local.io;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import cascading.tap.Tap;
import cascading.tap.TapException;
/**
*
*/
public class TapFileOutputStream extends FileOutputStream
{
public TapFileOutputStream( String path, boolean append ) throws FileNotFoundException
{
super( prepare( null, path ), append );
}
public TapFileOutputStream( Tap parent, String path, boolean update ) throws FileNotFoundException
{
super( prepare( parent, path ), update );
}
private static String prepare( Tap parent, String path )
{
File file;
if( parent == null )
file = new File( path );
else
file = new File( parent.getIdentifier(), path );
// ignore the output. will catch the failure downstream if any.
// not ignoring the output causes race conditions with other systems writing to the same directory.
File parentFile = file.getAbsoluteFile().getParentFile();
if( parentFile != null && parentFile.exists() && parentFile.isFile() )
throw new TapException( "cannot create parent directory, it already exists as a file: " + parentFile.getAbsolutePath() );
// don't test for success, just fighting a race condition otherwise
// will get caught downstream
if( parentFile != null )
parentFile.mkdirs();
return file.getAbsolutePath();
}
}