/*
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 Jun 24, 2008
*/
package com.bigdata.rdf.rules;
import java.util.Iterator;
import com.bigdata.relation.rule.AbstractRuleTestCase;
import com.bigdata.relation.rule.IRule;
import com.bigdata.relation.rule.IStep;
import com.bigdata.relation.rule.Program;
import com.bigdata.relation.rule.Rule;
/**
* Test suite for rule re-writes supporting truth maintenance for the RDF DB.
* This does NOT test the execution of those rules or their role in truth
* maintenance.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class TestTMUtility extends AbstractRuleTestCase {
/**
*
*/
public TestTMUtility() {
}
/**
* @param name
*/
public TestTMUtility(String name) {
super(name);
}
final private String database = "database";
final private String focusStore = "focusStore";
/**
* Test mapping of a rule with a single predicate in the tail across two
* relations for truth maintenance. This will produce a single new rule.
* That rule will read from the focusStore rather than the database.
*/
public void test_rewrite1() {
final Rule r = new TestRuleRdfs04a(database);
if (log.isInfoEnabled())
log.info(r.toString());
final Program program = TMUtility.INSTANCE.mapRuleForTruthMaintenance(
r, focusStore);
assertEquals(1, program.stepCount());
{
final IRule r0 = (IRule) program.steps().next();
if (log.isInfoEnabled())
log.info(r0.toString());
// reads from the focus store.
assertEquals(focusStore, r0.getTail(0).getOnlyRelationName());
// writes on the focus store.
assertEquals(focusStore, r0.getHead().getOnlyRelationName());
}
}
/**
* Test mapping of a rule with a two predicates in the tail across two
* relations for truth maintenance. This will produce 2 new rules.
* <p>
* In the first rule, the first tail will read from the focusStore while the
* second tail reads from the fused view of the focusStore and the database.
* <p>
* In the second rule, the first tail will read from the fused view while
* the second tail will read from the focusStore.
*/
public void test_rewrite2() {
final Rule r = new TestRuleRdfs9(database);
if (log.isInfoEnabled())
log.info(r.toString());
final Program program = TMUtility.INSTANCE.mapRuleForTruthMaintenance(
r, focusStore);
assertEquals(2, program.stepCount());
final Iterator<? extends IStep> itr = program.steps();
{
final IRule r0 = (IRule) itr.next();
if (log.isInfoEnabled())
log.info(r0.toString());
// 1st tail.
assertEquals(focusStore, r0.getTail(0).getOnlyRelationName());
// 2nd tail
assertEquals(database, r0.getTail(1).getRelationName(0));
assertEquals(focusStore, r0.getTail(1).getRelationName(1));
assertEquals(2, r0.getTail(1).getRelationCount());
// writes on the focus store.
assertEquals(focusStore, r0.getHead().getOnlyRelationName());
}
{
final IRule r1 = (IRule) itr.next();
if (log.isInfoEnabled())
log.info(r1.toString());
// 1st tail.
assertEquals(database, r1.getTail(0).getRelationName(0));
assertEquals(focusStore, r1.getTail(0).getRelationName(1));
assertEquals(2, r1.getTail(0).getRelationCount());
// 2nd tail
assertEquals(focusStore, r1.getTail(1).getOnlyRelationName());
// writes on the focus store.
assertEquals(focusStore, r1.getHead().getOnlyRelationName());
}
assertFalse(itr.hasNext());
}
}