/**
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 20, 2011
*/
package com.bigdata.rdf.sparql.ast;
import java.util.Collections;
import junit.framework.TestCase2;
import com.bigdata.bop.Constant;
import com.bigdata.rdf.internal.IV;
import com.bigdata.rdf.internal.VTE;
import com.bigdata.rdf.internal.impl.TermId;
/**
* @see StaticAnalysis#canJoin(IJoinNode, IJoinNode)
*/
public class TestStaticAnalysis_CanJoin extends TestCase2 {
/**
*
*/
public TestStaticAnalysis_CanJoin() {
}
/**
* @param name
*/
public TestStaticAnalysis_CanJoin(final String name) {
super(name);
}
/**
* Return a (Mock) IV.
*/
@SuppressWarnings("rawtypes")
protected IV mockIV() {
return TermId.mockIV(VTE.URI);
}
/**
* Correct rejection tests.
*
* @see StaticAnalysis#canJoin(IBindingProducerNode, IBindingProducerNode)
*/
public void test_canJoin_correctRejection() {
@SuppressWarnings("rawtypes")
final ConstantNode p = new ConstantNode(new Constant<IV>(mockIV()));
@SuppressWarnings("rawtypes")
final ConstantNode q = new ConstantNode(new Constant<IV>(mockIV()));
@SuppressWarnings("rawtypes")
final ConstantNode r = new ConstantNode(new Constant<IV>(mockIV()));
final VarNode x = new VarNode("x");
final VarNode y = new VarNode("y");
final VarNode z = new VarNode("z");
final StatementPatternNode p1 = new StatementPatternNode(p, y, z);
final StatementPatternNode p2 = new StatementPatternNode(x, q, r);
final StaticAnalysis sa = new StaticAnalysis(new QueryRoot(QueryType.SELECT));
// correct rejection w/ null arg.
try {
sa.canJoin(null, p2);
fail("Expecting: " + IllegalArgumentException.class);
} catch (IllegalArgumentException ex) {
if (log.isInfoEnabled())
log.info("Ignoring expected exception: " + ex);
}
// correct rejection w/ null arg.
try {
sa.canJoin(p1, null);
fail("Expecting: " + IllegalArgumentException.class);
} catch (IllegalArgumentException ex) {
if (log.isInfoEnabled())
log.info("Ignoring expected exception: " + ex);
}
}
/**
* Semantics tests focused on shared variables in the operands.
*
* @see StaticAnalysis#canJoin(IBindingProducerNode, IBindingProducerNode)
*/
public void test_canJoin() {
@SuppressWarnings("rawtypes")
final ConstantNode p = new ConstantNode(new Constant<IV>(mockIV()));
@SuppressWarnings("rawtypes")
final ConstantNode q = new ConstantNode(new Constant<IV>(mockIV()));
@SuppressWarnings("rawtypes")
final ConstantNode r = new ConstantNode(new Constant<IV>(mockIV()));
final VarNode u = new VarNode("u");
final VarNode x = new VarNode("x");
final VarNode y = new VarNode("y");
final VarNode z = new VarNode("z");
// p1 and p2 can join on y.
// p2 and p3 can join on z.
final StatementPatternNode p1 = new StatementPatternNode(x, y, p);
final StatementPatternNode p2 = new StatementPatternNode(y, z, q);
final StatementPatternNode p3 = new StatementPatternNode(u, z, r);
final StaticAnalysis sa = new StaticAnalysis(new QueryRoot(QueryType.SELECT));
// share y
assertTrue(sa.canJoin(p1, p2));
// share z
assertTrue(sa.canJoin(p2, p3));
// share z
assertFalse(sa.canJoin(p1, p3));
// shares (x,y) with self.
assertTrue(sa.canJoin(p1, p1));
}
// /**
// * TODO Write unit tests for canJoin of {@link IBindingProducerNode}s which
// * are not just {@link StatementPatternNode}s, including {@link ServiceNode}
// * , {@link SubqueryRoot}, etc.
// */
// public void test_canJoin_notJustStatementPatterns() {
// fail("write test");
// }
/**
* Verify that joins are not permitted when the variables are
* only shared via a FILTER.
*
* @see StaticAnalysis#canJoin(IBindingProducerNode, IBindingProducerNode)
*/
public void test_canJoin_filtersAreIngored() {
@SuppressWarnings("rawtypes")
final ConstantNode p = new ConstantNode(new Constant<IV>(mockIV()));
@SuppressWarnings("rawtypes")
final ConstantNode q = new ConstantNode(new Constant<IV>(mockIV()));
@SuppressWarnings("rawtypes")
final ConstantNode r = new ConstantNode(new Constant<IV>(mockIV()));
final VarNode x = new VarNode("x");
final VarNode y = new VarNode("y");
final VarNode z = new VarNode("z");
/*
* Note: p2 shares a variable via the FILTER.
*
* TODO Make sure that we test the simple optional case for
* canJoinWithFilters().
*/
final StatementPatternNode p1 = new StatementPatternNode(p, q, x);
final StatementPatternNode p2 = new StatementPatternNode(y, r, z);
p2.setOptional(true);
p2.setAttachedJoinFilters(Collections.singletonList(new FilterNode(x)));
final StaticAnalysis sa = new StaticAnalysis(new QueryRoot(QueryType.SELECT));
// verify that the variables in the annotations are ignored.
assertFalse(sa.canJoin(p1, p2));
}
}