/*
* 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.solr.search;
import java.io.IOException;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.Explanation;
import org.apache.lucene.search.FilterWeight;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.Rescorer;
import org.apache.lucene.search.Weight;
/**
* A {@code Weight} used by reranking queries.
*/
public class ReRankWeight extends FilterWeight {
final private IndexSearcher searcher;
final private Rescorer reRankQueryRescorer;
public ReRankWeight(Query mainQuery, Rescorer reRankQueryRescorer, IndexSearcher searcher, Weight mainWeight) throws IOException {
super(mainQuery, mainWeight);
this.searcher = searcher;
this.reRankQueryRescorer = reRankQueryRescorer;
}
public Explanation explain(LeafReaderContext context, int doc) throws IOException {
final Explanation mainExplain = in.explain(context, doc);
return reRankQueryRescorer.explain(searcher, mainExplain, context.docBase+doc);
}
}