| package org.apache.lucene.search; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.index.AtomicReaderContext; |
| |
| /** |
| * A {@link Collector} implementation which wraps another |
| * {@link Collector} and makes sure only documents with |
| * scores > 0 are collected. |
| */ |
| public class PositiveScoresOnlyCollector extends Collector { |
| |
| final private Collector c; |
| private Scorer scorer; |
| |
| public PositiveScoresOnlyCollector(Collector c) { |
| this.c = c; |
| } |
| |
| @Override |
| public void collect(int doc) throws IOException { |
| if (scorer.score() > 0) { |
| c.collect(doc); |
| } |
| } |
| |
| @Override |
| public void setNextReader(AtomicReaderContext context) throws IOException { |
| c.setNextReader(context); |
| } |
| |
| @Override |
| public void setScorer(Scorer scorer) throws IOException { |
| // Set a ScoreCachingWrappingScorer in case the wrapped Collector will call |
| // score() also. |
| this.scorer = new ScoreCachingWrappingScorer(scorer); |
| c.setScorer(this.scorer); |
| } |
| |
| @Override |
| public boolean acceptsDocsOutOfOrder() { |
| return c.acceptsDocsOutOfOrder(); |
| } |
| |
| } |