| /** |
| * 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.camel.component.lucene; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| import org.apache.camel.processor.lucene.support.Hit; |
| import org.apache.camel.processor.lucene.support.Hits; |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.queryParser.ParseException; |
| import org.apache.lucene.queryParser.QueryParser; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.ScoreDoc; |
| import org.apache.lucene.search.TopScoreDocCollector; |
| import org.apache.lucene.store.NIOFSDirectory; |
| import org.apache.lucene.util.Version; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class LuceneSearcher { |
| private static final transient Logger LOG = LoggerFactory.getLogger(LuceneSearcher.class); |
| private Analyzer analyzer; |
| private IndexSearcher indexSearcher; |
| private ScoreDoc[] hits; |
| |
| public void open(File indexDirectory, Analyzer analyzer) throws IOException { |
| if (indexDirectory != null) { |
| indexSearcher = new IndexSearcher(new NIOFSDirectory(indexDirectory), true); |
| } else { |
| indexSearcher = new IndexSearcher(new NIOFSDirectory(new File("./indexDirectory")), true); |
| } |
| this.analyzer = analyzer; |
| } |
| |
| public void close() throws IOException { |
| indexSearcher.close(); |
| } |
| |
| public Hits search(String searchPhrase, int maxNumberOfHits) throws Exception { |
| return search(searchPhrase, maxNumberOfHits, Version.LUCENE_30); |
| } |
| |
| public Hits search(String searchPhrase, int maxNumberOfHits, Version luenceVersion) throws Exception { |
| Hits searchHits = new Hits(); |
| |
| int numberOfHits = doSearch(searchPhrase, maxNumberOfHits, luenceVersion); |
| searchHits.setNumberOfHits(numberOfHits); |
| |
| for (ScoreDoc hit : hits) { |
| Document selectedDocument = indexSearcher.doc(hit.doc); |
| Hit aHit = new Hit(); |
| aHit.setHitLocation(hit.doc); |
| aHit.setScore(hit.score); |
| aHit.setData(selectedDocument.get("contents")); |
| searchHits.getHit().add(aHit); |
| } |
| |
| return searchHits; |
| } |
| |
| private int doSearch(String searchPhrase, int maxNumberOfHits, Version luenceVersion) throws NullPointerException, ParseException, IOException { |
| if (LOG.isTraceEnabled()) { |
| LOG.trace("*** Search Phrase: " + searchPhrase + " ***"); |
| } |
| |
| QueryParser parser = new QueryParser(luenceVersion, "contents", analyzer); |
| Query query = parser.parse(searchPhrase); |
| TopScoreDocCollector collector = TopScoreDocCollector.create(maxNumberOfHits, true); |
| indexSearcher.search(query, collector); |
| hits = collector.topDocs().scoreDocs; |
| |
| if (LOG.isTraceEnabled()) { |
| LOG.trace("*** Search generated " + hits.length + " hits ***"); |
| } |
| return hits.length; |
| } |
| } |