| /* |
| * 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.monitor; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.Scorable; |
| import org.apache.lucene.search.ScoreMode; |
| import org.apache.lucene.search.SimpleCollector; |
| |
| abstract class CollectingMatcher<T extends QueryMatch> extends CandidateMatcher<T> { |
| |
| private final ScoreMode scoreMode; |
| |
| CollectingMatcher(IndexSearcher searcher, ScoreMode scoreMode) { |
| super(searcher); |
| this.scoreMode = scoreMode; |
| } |
| |
| @Override |
| protected void matchQuery(final String queryId, Query matchQuery, Map<String, String> metadata) throws IOException { |
| searcher.search(matchQuery, new MatchCollector(queryId, scoreMode)); |
| } |
| |
| /** |
| * Called when a query matches a Document |
| * |
| * @param queryId the query ID |
| * @param doc the index of the document in the DocumentBatch |
| * @param scorer the Scorer for this query |
| * @return a match object |
| * @throws IOException on IO error |
| */ |
| protected abstract T doMatch(String queryId, int doc, Scorable scorer) throws IOException; |
| |
| private class MatchCollector extends SimpleCollector { |
| |
| private final String queryId; |
| private final ScoreMode scoreMode; |
| private Scorable scorer; |
| |
| MatchCollector(String queryId, ScoreMode scoreMode) { |
| this.queryId = queryId; |
| this.scoreMode = scoreMode; |
| } |
| |
| @Override |
| public void collect(int doc) throws IOException { |
| T match = doMatch(queryId, doc, scorer); |
| if (match != null) { |
| addMatch(match, doc); |
| } |
| } |
| |
| @Override |
| public void setScorer(Scorable scorer) { |
| this.scorer = scorer; |
| } |
| |
| @Override |
| public ScoreMode scoreMode() { |
| return scoreMode; |
| } |
| } |
| |
| } |