| /* |
| * 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.lucene.search; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.concurrent.Executor; |
| |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.util.Bits; |
| |
| /** |
| * An {@link IndexSearcher} that always uses the {@link Scorer} API, never {@link BulkScorer}. |
| */ |
| public class ScorerIndexSearcher extends IndexSearcher { |
| |
| /** Creates a searcher searching the provided index. Search on individual |
| * segments will be run in the provided {@link Executor}. |
| * @see IndexSearcher#IndexSearcher(IndexReader, Executor) */ |
| public ScorerIndexSearcher(IndexReader r, Executor executor) { |
| super(r, executor); |
| } |
| |
| /** Creates a searcher searching the provided index. |
| * @see IndexSearcher#IndexSearcher(IndexReader) */ |
| public ScorerIndexSearcher(IndexReader r) { |
| super(r); |
| } |
| |
| @Override |
| protected void search(List<LeafReaderContext> leaves, Weight weight, Collector collector) throws IOException { |
| for (LeafReaderContext ctx : leaves) { // search each subreader |
| // we force the use of Scorer (not BulkScorer) to make sure |
| // that the scorer passed to LeafCollector.setScorer supports |
| // Scorer.getChildren |
| Scorer scorer = weight.scorer(ctx); |
| if (scorer != null) { |
| final DocIdSetIterator iterator = scorer.iterator(); |
| final LeafCollector leafCollector = collector.getLeafCollector(ctx); |
| leafCollector.setScorer(scorer); |
| final Bits liveDocs = ctx.reader().getLiveDocs(); |
| for (int doc = iterator.nextDoc(); doc != DocIdSetIterator.NO_MORE_DOCS; doc = iterator.nextDoc()) { |
| if (liveDocs == null || liveDocs.get(doc)) { |
| leafCollector.collect(doc); |
| } |
| } |
| } |
| } |
| } |
| |
| } |