/*
* ModeShape (http://www.modeshape.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.modeshape.jcr.query.engine.process;
import static org.junit.Assert.assertTrue;
import java.util.HashSet;
import java.util.Set;
import org.junit.Before;
import org.junit.Test;
import org.modeshape.jcr.ExecutionContext;
import org.modeshape.jcr.cache.CachedNode;
import org.modeshape.jcr.cache.NodeKey;
import org.modeshape.jcr.query.AbstractNodeSequenceTest;
import org.modeshape.jcr.query.BufferManager;
import org.modeshape.jcr.query.NodeSequence;
import org.modeshape.jcr.query.NodeSequence.Batch;
import org.modeshape.jcr.query.model.TypeSystem;
import org.modeshape.jcr.value.ValueTypeSystem;
/**
* @author Randall Hauch (rhauch@redhat.com)
*/
public class DistinctSequenceTest extends AbstractNodeSequenceTest {
private ExecutionContext context;
private BufferManager bufferMgr;
private TypeSystem types;
@Override
@Before
public void beforeEach() {
super.beforeEach();
this.context = new ExecutionContext();
this.bufferMgr = new BufferManager(context);
this.types = new ValueTypeSystem(context.getValueFactories());
}
@Test
public void shouldNotIncludeDuplicateNodesUsingOnHeapBuffer() {
// print(true);
NodeSequence nonDistinct = NodeSequence.append(allNodes(), allNodes());
NodeSequence distinct = new DistinctSequence(nonDistinct, types, bufferMgr, true);
assertNoDuplicates(distinct);
}
@Test
public void shouldNotIncludeDuplicateNodesUsingOffHeapBuffer() {
// print(true);
NodeSequence nonDistinct = NodeSequence.append(allNodes(), allNodes());
NodeSequence distinct = new DistinctSequence(nonDistinct, types, bufferMgr, false);
assertNoDuplicates(distinct);
}
protected void assertNoDuplicates( NodeSequence sequence ) {
Set<NodeKey> keys = new HashSet<NodeKey>();
// Iterate over the batches ...
try {
Batch batch = null;
while ((batch = sequence.nextBatch()) != null) {
while (batch.hasNext()) {
batch.nextRow();
CachedNode node = batch.getNode();
NodeKey key = node != null ? node.getKey() : null;
boolean added = keys.add(key);
print("Adding " + key);
assertTrue("Failed to add " + key, added);
}
}
} finally {
sequence.close();
}
}
}