/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.jackrabbit.core.query.lucene.constraint;
import java.io.IOException;
import javax.jcr.RepositoryException;
import org.apache.jackrabbit.spi.commons.query.qom.DescendantNodeImpl;
import org.apache.jackrabbit.spi.commons.query.qom.SelectorImpl;
import org.apache.jackrabbit.spi.Name;
import org.apache.jackrabbit.core.query.lucene.ScoreNode;
import org.apache.jackrabbit.core.NodeImpl;
import org.apache.jackrabbit.core.SessionImpl;
import org.apache.jackrabbit.core.id.NodeId;
/**
* <code>DescendantNodeConstraint</code> implements a descendant node
* constraint.
*/
public class DescendantNodeConstraint extends HierarchyConstraint {
/**
* Creates a new descendant node constraint from the given QOM constraint.
*
* @param constraint the QOM descendant node constraint.
* @param selector the selector.
*/
public DescendantNodeConstraint(DescendantNodeImpl constraint,
SelectorImpl selector) {
super(constraint.getAncestorPath(), selector);
}
/**
* {@inheritDoc}
*/
public boolean evaluate(ScoreNode[] row,
Name[] selectorNames,
EvaluationContext context)
throws IOException {
NodeId baseId = getBaseNodeId(context);
if (baseId == null) {
return false;
}
ScoreNode sn = row[getSelectorIndex(selectorNames)];
if (sn == null) {
return false;
}
NodeId id = sn.getNodeId();
SessionImpl session = context.getSession();
try {
NodeImpl parent = session.getNodeById(id);
for (;;) {
// throws exception if there is no parent
parent = (NodeImpl) parent.getParent();
if (parent.getId().equals(baseId)) {
return true;
}
}
} catch (RepositoryException e) {
return false;
}
}
}