/*
* 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 javax.jcr.Value;
import javax.jcr.Property;
import javax.jcr.Node;
import javax.jcr.PathNotFoundException;
import javax.jcr.RepositoryException;
import org.apache.jackrabbit.spi.commons.query.qom.PropertyValueImpl;
import org.apache.jackrabbit.core.query.lucene.ScoreNode;
import org.apache.jackrabbit.core.state.ItemStateManager;
import org.apache.jackrabbit.core.state.PropertyState;
import org.apache.jackrabbit.core.state.ItemStateException;
import org.apache.jackrabbit.core.state.NoSuchItemStateException;
import org.apache.jackrabbit.core.id.PropertyId;
import org.apache.jackrabbit.core.SessionImpl;
/**
* <code>PropertyValueOperand</code> implements a property value operand.
*/
public class PropertyValueOperand extends DynamicOperand {
/**
* The QOM operand.
*/
private final PropertyValueImpl operand;
/**
* Creates a new property value operand.
*
* @param operand the QOM operand.
*/
public PropertyValueOperand(PropertyValueImpl operand) {
super();
this.operand = operand;
}
/**
* Returns the property state for the given score node or <code>null</code>
* if none exists.
*
* @param sn the current score node.
* @param context the evaluation context.
* @return the property state or <code>null</code>.
* @throws RepositoryException if an error occurs while reading.
*/
public final PropertyState getPropertyState(ScoreNode sn,
EvaluationContext context)
throws RepositoryException {
ItemStateManager ism = context.getItemStateManager();
PropertyId propId = new PropertyId(sn.getNodeId(), operand.getPropertyQName());
try {
return (PropertyState) ism.getItemState(propId);
} catch (NoSuchItemStateException e) {
return null;
} catch (ItemStateException e) {
throw new RepositoryException(e);
}
}
/**
* Returns the property for the given score node or <code>null</code> if
* none exists.
*
* @param sn the current score node.
* @param context the evaluation context.
* @return the property or <code>null</code>.
* @throws RepositoryException if an error occurs while reading.
*/
public final Property getProperty(ScoreNode sn,
EvaluationContext context)
throws RepositoryException {
SessionImpl session = context.getSession();
try {
Node n = session.getNodeById(sn.getNodeId());
return n.getProperty(operand.getPropertyName());
} catch (PathNotFoundException e) {
return null;
}
}
/**
* {@inheritDoc}
*/
public Value[] getValues(ScoreNode sn, EvaluationContext context)
throws RepositoryException {
Property prop = getProperty(sn, context);
if (prop == null) {
return EMPTY;
} else {
if (prop.isMultiple()) {
return prop.getValues();
} else {
return new Value[]{prop.getValue()};
}
}
}
}