/*
* 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.RepositoryException;
import org.apache.jackrabbit.core.query.lucene.ScoreNode;
/**
* <code>DynamicOperand</code> is a base class for dynamic operands.
*/
public abstract class DynamicOperand {
/**
* An empty {@link Value} array.
*/
protected static final Value[] EMPTY = new Value[0];
/**
* Returns the values for the given score node <code>sn</code> of this
* dynamic operand. If there are no values for the given score node, then
* an empty array is returned.
*
* @param sn the current score node.
* @param context the evaluation context.
* @return the values for the given score node.
* @throws RepositoryException if an error occurs while retrieving the value.
*/
public abstract Value[] getValues(ScoreNode sn, EvaluationContext context)
throws RepositoryException;
}