com.bigdata.bop.join.HTreeHashJoinAnnotations Maven / Gradle / Ivy

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/**

Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016.  All rights reserved.

Contact:
     SYSTAP, LLC DBA Blazegraph
     2501 Calvert ST NW #106
     Washington, DC 20008
     [email protected]

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 Nov 3, 2011
 */

package com.bigdata.bop.join;

import com.bigdata.bop.HTreeAnnotations;
import com.bigdata.bop.ap.Predicate;
import com.bigdata.htree.HTree;
import com.bigdata.rdf.internal.IV;
import com.bigdata.rdf.model.BigdataValue;

/**
 * Annotations in common for {@link HTree} based hash joins.
 * 
 * @author Bryan Thompson
 * @version $Id$
 */
public interface HTreeHashJoinAnnotations extends HTreeAnnotations,
        HashJoinAnnotations, JoinAnnotations {

    /**
     * The namespace of the lexicon relation.
     * 
     * Note: This is necessary for the ivCache index used to optimize the
     * serialized representation of the solution {@link IV}s. We need to know
     * how to serialize and deserialize {@link BigdataValue}s from the ivCache.
     * 
     * @see Predicate.Annotations#RELATION_NAME
     */
    String RELATION_NAME = Predicate.Annotations.RELATION_NAME;
    
}