| /* |
| * 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 org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.Tokenizer; |
| import org.apache.lucene.analysis.tokenattributes.CharTermAttribute; |
| import org.apache.lucene.analysis.tokenattributes.OffsetAttribute; |
| import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute; |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.document.Field; |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.lucene.index.MultiTerms; |
| import org.apache.lucene.index.PostingsEnum; |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.tests.index.RandomIndexWriter; |
| import org.apache.lucene.tests.util.LuceneTestCase; |
| import org.apache.lucene.util.BytesRef; |
| |
| /** Term position unit test. */ |
| public class TestPositionIncrement extends LuceneTestCase { |
| |
| static final boolean VERBOSE = false; |
| |
| public void testSetPosition() throws Exception { |
| Analyzer analyzer = |
| new Analyzer() { |
| @Override |
| public TokenStreamComponents createComponents(String fieldName) { |
| return new TokenStreamComponents( |
| new Tokenizer() { |
| // TODO: use CannedTokenStream |
| private final String[] TOKENS = {"1", "2", "3", "4", "5"}; |
| private final int[] INCREMENTS = {1, 2, 1, 0, 1}; |
| private int i = 0; |
| |
| PositionIncrementAttribute posIncrAtt = |
| addAttribute(PositionIncrementAttribute.class); |
| CharTermAttribute termAtt = addAttribute(CharTermAttribute.class); |
| OffsetAttribute offsetAtt = addAttribute(OffsetAttribute.class); |
| |
| @Override |
| public boolean incrementToken() { |
| if (i == TOKENS.length) return false; |
| clearAttributes(); |
| termAtt.append(TOKENS[i]); |
| offsetAtt.setOffset(i, i); |
| posIncrAtt.setPositionIncrement(INCREMENTS[i]); |
| i++; |
| return true; |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| super.reset(); |
| this.i = 0; |
| } |
| }); |
| } |
| }; |
| Directory store = newDirectory(); |
| RandomIndexWriter writer = new RandomIndexWriter(random(), store, analyzer); |
| Document d = new Document(); |
| d.add(newTextField("field", "bogus", Field.Store.YES)); |
| writer.addDocument(d); |
| IndexReader reader = writer.getReader(); |
| writer.close(); |
| |
| IndexSearcher searcher = newSearcher(reader); |
| |
| PostingsEnum pos = |
| MultiTerms.getTermPostingsEnum(searcher.getIndexReader(), "field", new BytesRef("1")); |
| pos.nextDoc(); |
| // first token should be at position 0 |
| assertEquals(0, pos.nextPosition()); |
| |
| pos = MultiTerms.getTermPostingsEnum(searcher.getIndexReader(), "field", new BytesRef("2")); |
| pos.nextDoc(); |
| // second token should be at position 2 |
| assertEquals(2, pos.nextPosition()); |
| |
| PhraseQuery q; |
| ScoreDoc[] hits; |
| |
| q = new PhraseQuery("field", "1", "2"); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(0, hits.length); |
| |
| // same as previous, using the builder with implicit positions |
| PhraseQuery.Builder builder = new PhraseQuery.Builder(); |
| builder.add(new Term("field", "1")); |
| builder.add(new Term("field", "2")); |
| q = builder.build(); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(0, hits.length); |
| |
| // same as previous, just specify positions explicitely. |
| builder = new PhraseQuery.Builder(); |
| builder.add(new Term("field", "1"), 0); |
| builder.add(new Term("field", "2"), 1); |
| q = builder.build(); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(0, hits.length); |
| |
| // specifying correct positions should find the phrase. |
| builder = new PhraseQuery.Builder(); |
| builder.add(new Term("field", "1"), 0); |
| builder.add(new Term("field", "2"), 2); |
| q = builder.build(); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(1, hits.length); |
| |
| q = new PhraseQuery("field", "2", "3"); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(1, hits.length); |
| |
| q = new PhraseQuery("field", "3", "4"); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(0, hits.length); |
| |
| // phrase query would find it when correct positions are specified. |
| builder = new PhraseQuery.Builder(); |
| builder.add(new Term("field", "3"), 0); |
| builder.add(new Term("field", "4"), 0); |
| q = builder.build(); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(1, hits.length); |
| |
| // phrase query should fail for non existing searched term |
| // even if there exist another searched terms in the same searched position. |
| builder = new PhraseQuery.Builder(); |
| builder.add(new Term("field", "3"), 0); |
| builder.add(new Term("field", "9"), 0); |
| q = builder.build(); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(0, hits.length); |
| |
| // multi-phrase query should succed for non existing searched term |
| // because there exist another searched terms in the same searched position. |
| MultiPhraseQuery.Builder mqb = new MultiPhraseQuery.Builder(); |
| mqb.add(new Term[] {new Term("field", "3"), new Term("field", "9")}, 0); |
| hits = searcher.search(mqb.build(), 1000).scoreDocs; |
| assertEquals(1, hits.length); |
| |
| q = new PhraseQuery("field", "2", "4"); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(1, hits.length); |
| |
| q = new PhraseQuery("field", "3", "5"); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(1, hits.length); |
| |
| q = new PhraseQuery("field", "4", "5"); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(1, hits.length); |
| |
| q = new PhraseQuery("field", "2", "5"); |
| hits = searcher.search(q, 1000).scoreDocs; |
| assertEquals(0, hits.length); |
| |
| reader.close(); |
| store.close(); |
| } |
| } |