/*
* 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.join;
import java.io.IOException;
import org.apache.jackrabbit.core.query.lucene.ScoreNode;
import org.apache.jackrabbit.spi.Name;
/**
* <code>Condition</code> defines an interface for a join condition.
*/
public interface Condition {
/**
* Returns the matching inner score nodes for the given outer score node
* <code>sn</code>.
*
* @param outer the current score nodes of the outer source.
* @return the matching score nodes in the inner source.
* @throws IOException if an error occurs while evaluating the condition.
*/
public ScoreNode[][] getMatchingScoreNodes(ScoreNode outer)
throws IOException;
/**
* @return the selector name of the inner hits.
*/
public Name[] getInnerSelectorNames();
/**
* Closes this condition and frees resources.
*
* @throws IOException if an error occurs while closing this condition.
*/
public void close() throws IOException;
}