/**
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 22, 2011
*/
package com.bigdata.relation.accesspath;
import java.io.Serializable;
import com.bigdata.bop.ap.filter.SameVariableConstraint;
import com.bigdata.btree.ITuple;
import com.bigdata.btree.filter.TupleFilter;
/**
* {@link TupleFilter} class wrapping the {@link SameVariableConstraint}.
* <p>
* Note: This filter can execute local to the index shard in scale-out.
* Therefore it MUST NOT have a reference to the {@link AccessPath} in order to
* be {@link Serializable}. This used to be an "inline" class in
* {@link AccessPath}. It was promoted to a top-level class for this reason.
*/
public class SameVariableConstraintTupleFilter<E> extends TupleFilter<E> {
private static final long serialVersionUID = 1L;
private final SameVariableConstraint<E> sameVariableConstraint;
SameVariableConstraintTupleFilter(
final SameVariableConstraint<E> sameVariableConstraint) {
this.sameVariableConstraint = sameVariableConstraint;
}
@Override
protected boolean isValid(final ITuple tuple) {
return sameVariableConstraint.isValid(tuple.getObject());
}
}