/*
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 Jul 9, 2008
*/
package com.bigdata.rdf.rules;
import java.util.Properties;
import org.apache.log4j.Logger;
import com.bigdata.bop.joinGraph.IEvaluationPlanFactory;
import com.bigdata.journal.IIndexManager;
import com.bigdata.rdf.axioms.Axioms;
import com.bigdata.rdf.spo.SPORelation;
import com.bigdata.relation.accesspath.IAccessPath;
import com.bigdata.relation.accesspath.IElementFilter;
import com.bigdata.relation.rule.eval.AbstractJoinNexusFactory;
import com.bigdata.relation.rule.eval.ActionEnum;
import com.bigdata.relation.rule.eval.IJoinNexus;
import com.bigdata.relation.rule.eval.IRuleTaskFactory;
/**
* Factory for {@link RDFJoinNexus} objects.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class RDFJoinNexusFactory extends AbstractJoinNexusFactory {
/**
*
*/
private static final long serialVersionUID = 1L;
protected static final transient Logger log = Logger.getLogger(RDFJoinNexusFactory.class);
final RuleContextEnum ruleContext;
final boolean justify;
final boolean backchain;
final boolean isOwlSameAsUsed;
@Override
protected void toString(final StringBuilder sb) {
sb.append("{ ruleContext=" + ruleContext);
sb.append(", justify=" + justify);
sb.append(", backchain=" + backchain);
sb.append(", isOwlSameAsUsed=" + isOwlSameAsUsed);
}
/**
* {@inheritDoc}
*
* @param justify
* if justifications are required.
* @param backchain
* Normally <code>true</code> for high level query and
* <code>false</code> for database-at-once-closure and Truth
* Maintenance. When <code>true</code>, query time inferences
* are included when reading on an {@link IAccessPath} for the
* {@link SPORelation} using the {@link InferenceEngine} to
* "backchain" any necessary entailments.
* @param isOwlSameAsUsed
* <code>true</code> iff {@link Axioms#isOwlSameAs()} AND
* <code>(x owl:sameAs y)</code> is not empty in the data.
*/
public RDFJoinNexusFactory(//
final ActionEnum action,//
final long writeTimestamp,//
final long readTimestamp,//
final Properties properties,//
final int solutionFlags, //
final IElementFilter<?> filter,//
final IEvaluationPlanFactory planFactory,//
final IRuleTaskFactory defaultRuleTaskFactory,//
// RDF specific parameters.
final RuleContextEnum ruleContext,//
final boolean justify, //
final boolean backchain, //
final boolean isOwlSameAsUsed//
) {
super(action, writeTimestamp, readTimestamp, properties, solutionFlags,
filter, planFactory, defaultRuleTaskFactory);
if (ruleContext == null)
throw new IllegalArgumentException();
this.ruleContext = ruleContext;
this.justify = justify;
this.backchain = backchain;
this.isOwlSameAsUsed = isOwlSameAsUsed;
}
@Override
protected IJoinNexus newJoinNexus(final IIndexManager indexManager) {
return new RDFJoinNexus(this, indexManager);
}
}