/*
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 19, 2008
*/
package com.bigdata.relation.rule.eval;
import java.util.Arrays;
import junit.framework.TestCase2;
import com.bigdata.bop.Constant;
import com.bigdata.bop.IConstant;
import com.bigdata.bop.IPredicate;
import com.bigdata.bop.IVariable;
import com.bigdata.bop.Var;
import com.bigdata.rdf.spo.SPOPredicate;
import com.bigdata.relation.rule.IRule;
import com.bigdata.relation.rule.QueryOptions;
import com.bigdata.relation.rule.Rule;
/**
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Mike Personick</a>
* @version $Id$
*/
public class TestRuleState extends TestCase2 {
/**
*
*/
public TestRuleState() {
}
/**
* @param name
*/
public TestRuleState(String name) {
super(name);
}
public void test_requiredVars() {
// select ?a where { ?a x ?b . ?b x ?c . ?c x ?d . ?d x ?e . }
final IConstant x = new Constant<Integer>(1);
final IPredicate[] tails = new IPredicate[] {
new SPOPredicate("", Var.var("d"), x, Var.var("e")),
new SPOPredicate("", Var.var("a"), x, Var.var("b")),
new SPOPredicate("", Var.var("b"), x, Var.var("c")),
new SPOPredicate("", Var.var("c"), x, Var.var("d")),
};
final IVariable[] requiredVars = new IVariable[] {
Var.var("a")
};
final Rule rule =
new Rule("", null, tails, QueryOptions.NONE, null, null, null, requiredVars);
final int[] order = new int[] {
1,2,3,0
};
final RuleState2 ruleState = new RuleState2(rule, order);
for (int i = 0; i < 4; i++) {
System.err.println(Arrays.toString(ruleState.requiredVars[i]));
}
}
protected class RuleState2 extends RuleState {
protected final IVariable[][] requiredVars;
public RuleState2(final IRule rule, final int[] order) {
super(rule);
this.requiredVars = computeRequiredVarsForEachTail(rule, order);
}
}
}