| 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.analysis.Analyzer; |
| import org.apache.lucene.analysis.MockAnalyzer; |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.document.StringField; |
| import org.apache.lucene.document.TextField; |
| import org.apache.lucene.document.Field.Store; |
| import org.apache.lucene.index.AtomicReaderContext; |
| import org.apache.lucene.index.FieldInvertState; |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.lucene.index.IndexWriterConfig; |
| import org.apache.lucene.index.RandomIndexWriter; |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.search.similarities.Similarity; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.LuceneTestCase; |
| |
| public class TestConjunctions extends LuceneTestCase { |
| Analyzer analyzer; |
| Directory dir; |
| IndexReader reader; |
| IndexSearcher searcher; |
| |
| static final String F1 = "title"; |
| static final String F2 = "body"; |
| |
| @Override |
| public void setUp() throws Exception { |
| super.setUp(); |
| analyzer = new MockAnalyzer(random()); |
| dir = newDirectory(); |
| IndexWriterConfig config = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer); |
| config.setMergePolicy(newLogMergePolicy()); // we will use docids to validate |
| RandomIndexWriter writer = new RandomIndexWriter(random(), dir, config); |
| writer.addDocument(doc("lucene", "lucene is a very popular search engine library")); |
| writer.addDocument(doc("solr", "solr is a very popular search server and is using lucene")); |
| writer.addDocument(doc("nutch", "nutch is an internet search engine with web crawler and is using lucene and hadoop")); |
| reader = writer.getReader(); |
| writer.close(); |
| searcher = newSearcher(reader); |
| searcher.setSimilarity(new TFSimilarity()); |
| } |
| |
| static Document doc(String v1, String v2) { |
| Document doc = new Document(); |
| doc.add(new StringField(F1, v1, Store.YES)); |
| doc.add(new TextField(F2, v2, Store.YES)); |
| return doc; |
| } |
| |
| public void testTermConjunctionsWithOmitTF() throws Exception { |
| BooleanQuery bq = new BooleanQuery(); |
| bq.add(new TermQuery(new Term(F1, "nutch")), BooleanClause.Occur.MUST); |
| bq.add(new TermQuery(new Term(F2, "is")), BooleanClause.Occur.MUST); |
| TopDocs td = searcher.search(bq, 3); |
| assertEquals(1, td.totalHits); |
| assertEquals(3F, td.scoreDocs[0].score, 0.001F); // f1:nutch + f2:is + f2:is |
| } |
| |
| @Override |
| public void tearDown() throws Exception { |
| reader.close(); |
| dir.close(); |
| super.tearDown(); |
| } |
| |
| // Similarity that returns the TF as score |
| private static class TFSimilarity extends Similarity { |
| |
| @Override |
| public long computeNorm(FieldInvertState state) { |
| return 1; // we dont care |
| } |
| |
| @Override |
| public SimWeight computeWeight(float queryBoost, |
| CollectionStatistics collectionStats, TermStatistics... termStats) { |
| return new SimWeight() { |
| @Override |
| public float getValueForNormalization() { |
| return 1; // we don't care |
| } |
| @Override |
| public void normalize(float queryNorm, float topLevelBoost) { |
| // we don't care |
| } |
| }; |
| } |
| |
| @Override |
| public SimScorer simScorer(SimWeight weight, AtomicReaderContext context) throws IOException { |
| return new SimScorer() { |
| @Override |
| public float score(int doc, float freq) { |
| return freq; |
| } |
| |
| @Override |
| public float computeSlopFactor(int distance) { |
| return 1F; |
| } |
| |
| @Override |
| public float computePayloadFactor(int doc, int start, int end, BytesRef payload) { |
| return 1F; |
| } |
| }; |
| } |
| } |
| } |