/*
* Copyright (c) 2007-2010 Concurrent, Inc. All Rights Reserved.
*
* Project and contact information: http://www.cascading.org/
*
* This file is part of the Cascading project.
*
* Cascading is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Cascading is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Cascading. If not, see <http://www.gnu.org/licenses/>.
*/
package cascading.flow;
import java.io.IOException;
/**
* Class FlowSkipIfSinkExists is a {@link cascading.flow.FlowSkipStrategy} implementation that returns
* {@code true} if the Flow sink exists, regardless if it is stale or not.
*/
public class FlowSkipIfSinkExists implements FlowSkipStrategy
{
public boolean skipFlow( Flow flow ) throws IOException
{
// if tap is in replace mode, will be treated as not existing
long sinkModified = flow.getSinkModified();
if( sinkModified <= 0 ) // do not skip, sinks don't exist
return false;
return true;
}
}