/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program 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; version 2 of the License.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Sep 28, 2010
*/
package com.bigdata.bop.rdf.filter;
import java.util.Map;
import com.bigdata.bop.BOp;
import com.bigdata.bop.IPredicate;
import com.bigdata.bop.ap.filter.BOpResolver;
import com.bigdata.rdf.spo.ISPO;
import com.bigdata.rdf.spo.SPO;
/**
* Strips the context information from an {@link SPO}. This is used in default
* graph access paths. It operators on {@link ISPO}s so it must be applied using
* {@link IPredicate.Annotations#ACCESS_PATH_FILTER}.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class StripContextFilter extends BOpResolver {
/**
*
*/
private static final long serialVersionUID = 1L;
/**
* A default instance.
*/
public static StripContextFilter newInstance() {
return new StripContextFilter(BOp.NOARGS, BOp.NOANNS);
}
/**
* @param op
*/
public StripContextFilter(StripContextFilter op) {
super(op);
}
/**
* @param args
* @param annotations
*/
public StripContextFilter(BOp[] args, Map<String, Object> annotations) {
super(args, annotations);
}
/**
* Strips the context position off of a visited {@link ISPO}.
*/
@Override
protected Object resolve(final Object obj) {
final ISPO tmp = (ISPO) obj;
return new SPO(tmp.s(), tmp.p(), tmp.o());
}
}