/*
* 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;
import java.io.IOException;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.Weight;
import org.apache.lucene.search.Searcher;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.Explanation;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.IndexReader;
/**
* <code>JackrabbitTermQuery</code> implements a {@link TermQuery} where score
* values are retrieved on a per index segment basis using {@link MultiScorer}.
*/
public class JackrabbitTermQuery extends TermQuery {
private static final long serialVersionUID = 4244799812287335957L;
public JackrabbitTermQuery(Term t) {
super(t);
}
public Weight createWeight(Searcher searcher) throws IOException {
// use a FilterSearcher to prevent per segment searches
// done by lucene. we handle that on our own
// see instanceof check in lucene TermWeight constructor
return new JackrabbitTermWeight(searcher,
super.createWeight(new FilterSearcher(searcher)));
}
/**
* The weight implementation.
*/
protected class JackrabbitTermWeight extends AbstractWeight {
private static final long serialVersionUID = -2070964510010945854L;
/**
* The default lucene TermQuery weight.
*/
private final Weight weight;
public JackrabbitTermWeight(Searcher searcher, Weight weight) {
super(searcher);
this.weight = weight;
}
/**
* {@inheritDoc}
*/
protected Scorer createScorer(IndexReader reader, boolean scoreDocsInOrder,
boolean topScorer) throws IOException {
return weight.scorer(reader, scoreDocsInOrder, topScorer);
}
/**
* {@inheritDoc}
*/
public Query getQuery() {
return JackrabbitTermQuery.this;
}
/**
* {@inheritDoc}
*/
public float getValue() {
return weight.getValue();
}
/**
* {@inheritDoc}
*/
public float sumOfSquaredWeights() throws IOException {
return weight.sumOfSquaredWeights();
}
/**
* {@inheritDoc}
*/
public void normalize(float norm) {
weight.normalize(norm);
}
/**
* {@inheritDoc}
*/
public Explanation explain(IndexReader reader, int doc) throws
IOException {
return weight.explain(reader, doc);
}
}
}