RuleFastClosure3.java

/**

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 Oct 25, 2007
 */

package com.bigdata.rdf.rules;

import java.util.Set;

import org.openrdf.model.vocabulary.RDFS;

import com.bigdata.bop.IConstant;
import com.bigdata.rdf.internal.IV;
import com.bigdata.rdf.vocab.Vocabulary;
import com.bigdata.relation.accesspath.IBuffer;
import com.bigdata.relation.rule.IRule;
import com.bigdata.relation.rule.eval.IJoinNexus;
import com.bigdata.relation.rule.eval.IRuleTaskFactory;
import com.bigdata.relation.rule.eval.ISolution;
import com.bigdata.relation.rule.eval.IStepTask;

public class RuleFastClosure3 extends AbstractRuleFastClosure_3_5_6_7_9 {

    /**
     * 
     */
    private static final long serialVersionUID = 8276555097415122677L;

    /**
     * @param vocab
     * @param P
     */
    public RuleFastClosure3(
            final String database,
            final String focusStore,
            final Vocabulary vocab) {
        //, Set<Long> P) {
        
        super("fastClosure3",
                database,
                vocab.getConstant(RDFS.SUBPROPERTYOF),
                vocab.getConstant(RDFS.SUBPROPERTYOF),
                new FastClosure_3_RuleTaskFactory(database, focusStore, vocab));
        
    }

    /**
     * Custom rule executor factory.
     * 
     * @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
     * @version $Id$
     */
    private static class FastClosure_3_RuleTaskFactory implements IRuleTaskFactory {

        /**
         * 
         */
        private static final long serialVersionUID = -7577223026737453989L;

        final private String database;

        final private String focusStore;

        final private IConstant<IV> rdfsSubPropertyOf;

        public FastClosure_3_RuleTaskFactory(final String database,
                final String focusStore, final Vocabulary vocab) {

            this.database = database;

            this.focusStore = focusStore;

            rdfsSubPropertyOf = vocab.getConstant(RDFS.SUBPROPERTYOF);

        }

        public IStepTask newTask(IRule rule, IJoinNexus joinNexus,
                IBuffer<ISolution[]> buffer) {

            return new FastClosureRuleTask(database, focusStore, rule,
                    joinNexus, buffer, /* P, */
                    rdfsSubPropertyOf, //
                    rdfsSubPropertyOf) {

                /**
                 * Note: This is the set {P} in the fast closure
                 * program.
                 */
                public Set<IV> getSet() {

                    return getSubProperties();

                }

            };

        }

    }

}