+++ /dev/null
-package org.apache.lucene.analysis.shingle;
-
-/**
- * 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.Reader;
-import java.io.StringReader;
-
-import org.apache.lucene.analysis.Analyzer;
-import org.apache.lucene.analysis.BaseTokenStreamTestCase;
-import org.apache.lucene.analysis.MockAnalyzer;
-import org.apache.lucene.analysis.MockTokenizer;
-import org.apache.lucene.analysis.TokenStream;
-import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
-import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute;
-import org.apache.lucene.document.Document;
-import org.apache.lucene.document.Field;
-import org.apache.lucene.index.IndexWriter;
-import org.apache.lucene.index.IndexWriterConfig;
-import org.apache.lucene.index.Term;
-import org.apache.lucene.queryParser.QueryParser;
-import org.apache.lucene.search.BooleanClause;
-import org.apache.lucene.search.BooleanQuery;
-import org.apache.lucene.search.IndexSearcher;
-import org.apache.lucene.search.PhraseQuery;
-import org.apache.lucene.search.Query;
-import org.apache.lucene.search.ScoreDoc;
-import org.apache.lucene.search.TermQuery;
-import org.apache.lucene.store.Directory;
-import org.apache.lucene.store.RAMDirectory;
-
-/**
- * A test class for ShingleAnalyzerWrapper as regards queries and scoring.
- */
-public class ShingleAnalyzerWrapperTest extends BaseTokenStreamTestCase {
-
- public IndexSearcher searcher;
-
- /**
- * Set up a new index in RAM with three test phrases and the supplied Analyzer.
- *
- * @param analyzer the analyzer to use
- * @return an indexSearcher on the test index.
- * @throws Exception if an error occurs with index writer or searcher
- */
- public IndexSearcher setUpSearcher(Analyzer analyzer) throws Exception {
- Directory dir = new RAMDirectory();
- IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(TEST_VERSION_CURRENT, analyzer));
-
- Document doc;
- doc = new Document();
- doc.add(new Field("content", "please divide this sentence into shingles",
- Field.Store.YES,Field.Index.ANALYZED));
- writer.addDocument(doc);
-
- doc = new Document();
- doc.add(new Field("content", "just another test sentence",
- Field.Store.YES,Field.Index.ANALYZED));
- writer.addDocument(doc);
-
- doc = new Document();
- doc.add(new Field("content", "a sentence which contains no test",
- Field.Store.YES,Field.Index.ANALYZED));
- writer.addDocument(doc);
-
- writer.close();
-
- return new IndexSearcher(dir, true);
- }
-
- protected ScoreDoc[] queryParsingTest(Analyzer analyzer, String qs) throws Exception {
- searcher = setUpSearcher(analyzer);
-
- QueryParser qp = new QueryParser(TEST_VERSION_CURRENT, "content", analyzer);
-
- Query q = qp.parse(qs);
-
- return searcher.search(q, null, 1000).scoreDocs;
- }
-
- protected void compareRanks(ScoreDoc[] hits, int[] ranks) throws Exception {
- assertEquals(ranks.length, hits.length);
- for (int i = 0; i < ranks.length; i++) {
- assertEquals(ranks[i], hits[i].doc);
- }
- }
-
- /*
- * Will not work on an index without unigrams, since QueryParser automatically
- * tokenizes on whitespace.
- */
- public void testShingleAnalyzerWrapperQueryParsing() throws Exception {
- ScoreDoc[] hits = queryParsingTest(new ShingleAnalyzerWrapper
- (new MockAnalyzer(random, MockTokenizer.WHITESPACE, false), 2),
- "test sentence");
- int[] ranks = new int[] { 1, 2, 0 };
- compareRanks(hits, ranks);
- }
-
- /*
- * This one fails with an exception.
- */
- public void testShingleAnalyzerWrapperPhraseQueryParsingFails() throws Exception {
- ScoreDoc[] hits = queryParsingTest(new ShingleAnalyzerWrapper
- (new MockAnalyzer(random, MockTokenizer.WHITESPACE, false), 2),
- "\"this sentence\"");
- int[] ranks = new int[] { 0 };
- compareRanks(hits, ranks);
- }
-
- /*
- * This one works, actually.
- */
- public void testShingleAnalyzerWrapperPhraseQueryParsing() throws Exception {
- ScoreDoc[] hits = queryParsingTest(new ShingleAnalyzerWrapper
- (new MockAnalyzer(random, MockTokenizer.WHITESPACE, false), 2),
- "\"test sentence\"");
- int[] ranks = new int[] { 1 };
- compareRanks(hits, ranks);
- }
-
- /*
- * Same as above, is tokenized without using the analyzer.
- */
- public void testShingleAnalyzerWrapperRequiredQueryParsing() throws Exception {
- ScoreDoc[] hits = queryParsingTest(new ShingleAnalyzerWrapper
- (new MockAnalyzer(random, MockTokenizer.WHITESPACE, false), 2),
- "+test +sentence");
- int[] ranks = new int[] { 1, 2 };
- compareRanks(hits, ranks);
- }
-
- /*
- * This shows how to construct a phrase query containing shingles.
- */
- public void testShingleAnalyzerWrapperPhraseQuery() throws Exception {
- Analyzer analyzer = new ShingleAnalyzerWrapper(new MockAnalyzer(random, MockTokenizer.WHITESPACE, false), 2);
- searcher = setUpSearcher(analyzer);
-
- PhraseQuery q = new PhraseQuery();
-
- TokenStream ts = analyzer.tokenStream("content",
- new StringReader("this sentence"));
- int j = -1;
-
- PositionIncrementAttribute posIncrAtt = ts.addAttribute(PositionIncrementAttribute.class);
- CharTermAttribute termAtt = ts.addAttribute(CharTermAttribute.class);
-
- ts.reset();
- while (ts.incrementToken()) {
- j += posIncrAtt.getPositionIncrement();
- String termText = termAtt.toString();
- q.add(new Term("content", termText), j);
- }
-
- ScoreDoc[] hits = searcher.search(q, null, 1000).scoreDocs;
- int[] ranks = new int[] { 0 };
- compareRanks(hits, ranks);
- }
-
- /*
- * How to construct a boolean query with shingles. A query like this will
- * implicitly score those documents higher that contain the words in the query
- * in the right order and adjacent to each other.
- */
- public void testShingleAnalyzerWrapperBooleanQuery() throws Exception {
- Analyzer analyzer = new ShingleAnalyzerWrapper(new MockAnalyzer(random, MockTokenizer.WHITESPACE, false), 2);
- searcher = setUpSearcher(analyzer);
-
- BooleanQuery q = new BooleanQuery();
-
- TokenStream ts = analyzer.tokenStream("content",
- new StringReader("test sentence"));
-
- CharTermAttribute termAtt = ts.addAttribute(CharTermAttribute.class);
-
- ts.reset();
-
- while (ts.incrementToken()) {
- String termText = termAtt.toString();
- q.add(new TermQuery(new Term("content", termText)),
- BooleanClause.Occur.SHOULD);
- }
-
- ScoreDoc[] hits = searcher.search(q, null, 1000).scoreDocs;
- int[] ranks = new int[] { 1, 2, 0 };
- compareRanks(hits, ranks);
- }
-
- public void testReusableTokenStream() throws Exception {
- Analyzer a = new ShingleAnalyzerWrapper(new MockAnalyzer(random, MockTokenizer.WHITESPACE, false), 2);
- assertAnalyzesToReuse(a, "please divide into shingles",
- new String[] { "please", "please divide", "divide", "divide into", "into", "into shingles", "shingles" },
- new int[] { 0, 0, 7, 7, 14, 14, 19 },
- new int[] { 6, 13, 13, 18, 18, 27, 27 },
- new int[] { 1, 0, 1, 0, 1, 0, 1 });
- assertAnalyzesToReuse(a, "divide me up again",
- new String[] { "divide", "divide me", "me", "me up", "up", "up again", "again" },
- new int[] { 0, 0, 7, 7, 10, 10, 13 },
- new int[] { 6, 9, 9, 12, 12, 18, 18 },
- new int[] { 1, 0, 1, 0, 1, 0, 1 });
- }
-
- /*
- * analyzer that does not support reuse
- * it is LetterTokenizer on odd invocations, WhitespaceTokenizer on even.
- */
- private class NonreusableAnalyzer extends Analyzer {
- int invocationCount = 0;
- @Override
- public TokenStream tokenStream(String fieldName, Reader reader) {
- if (++invocationCount % 2 == 0)
- return new MockTokenizer(reader, MockTokenizer.WHITESPACE, false);
- else
- return new MockTokenizer(reader, MockTokenizer.SIMPLE, false);
- }
- }
-
- public void testWrappedAnalyzerDoesNotReuse() throws Exception {
- Analyzer a = new ShingleAnalyzerWrapper(new NonreusableAnalyzer());
- assertAnalyzesToReuse(a, "please divide into shingles.",
- new String[] { "please", "please divide", "divide", "divide into", "into", "into shingles", "shingles" },
- new int[] { 0, 0, 7, 7, 14, 14, 19 },
- new int[] { 6, 13, 13, 18, 18, 27, 27 },
- new int[] { 1, 0, 1, 0, 1, 0, 1 });
- assertAnalyzesToReuse(a, "please divide into shingles.",
- new String[] { "please", "please divide", "divide", "divide into", "into", "into shingles.", "shingles." },
- new int[] { 0, 0, 7, 7, 14, 14, 19 },
- new int[] { 6, 13, 13, 18, 18, 28, 28 },
- new int[] { 1, 0, 1, 0, 1, 0, 1 });
- assertAnalyzesToReuse(a, "please divide into shingles.",
- new String[] { "please", "please divide", "divide", "divide into", "into", "into shingles", "shingles" },
- new int[] { 0, 0, 7, 7, 14, 14, 19 },
- new int[] { 6, 13, 13, 18, 18, 27, 27 },
- new int[] { 1, 0, 1, 0, 1, 0, 1 });
- }
-
- public void testNonDefaultMinShingleSize() throws Exception {
- ShingleAnalyzerWrapper analyzer
- = new ShingleAnalyzerWrapper(new MockAnalyzer(random, MockTokenizer.WHITESPACE, false), 3, 4);
- assertAnalyzesToReuse(analyzer, "please divide this sentence into shingles",
- new String[] { "please", "please divide this", "please divide this sentence",
- "divide", "divide this sentence", "divide this sentence into",
- "this", "this sentence into", "this sentence into shingles",
- "sentence", "sentence into shingles",
- "into",
- "shingles" },
- new int[] { 0, 0, 0, 7, 7, 7, 14, 14, 14, 19, 19, 28, 33 },
- new int[] { 6, 18, 27, 13, 27, 32, 18, 32, 41, 27, 41, 32, 41 },
- new int[] { 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1 });
- analyzer.setOutputUnigrams(false);
- assertAnalyzesToReuse(analyzer, "please divide this sentence into shingles",
- new String[] { "please divide this", "please divide this sentence",
- "divide this sentence", "divide this sentence into",
- "this sentence into", "this sentence into shingles",
- "sentence into shingles" },
- new int[] { 0, 0, 7, 7, 14, 14, 19 },
- new int[] { 18, 27, 27, 32, 32, 41, 41 },
- new int[] { 1, 0, 1, 0, 1, 0, 1 });
- }
-
- public void testNonDefaultMinAndSameMaxShingleSize() throws Exception {
- ShingleAnalyzerWrapper analyzer
- = new ShingleAnalyzerWrapper(new MockAnalyzer(random, MockTokenizer.WHITESPACE, false), 3, 3);
- assertAnalyzesToReuse(analyzer, "please divide this sentence into shingles",
- new String[] { "please", "please divide this",
- "divide", "divide this sentence",
- "this", "this sentence into",
- "sentence", "sentence into shingles",
- "into",
- "shingles" },
- new int[] { 0, 0, 7, 7, 14, 14, 19, 19, 28, 33 },
- new int[] { 6, 18, 13, 27, 18, 32, 27, 41, 32, 41 },
- new int[] { 1, 0, 1, 0, 1, 0, 1, 0, 1, 1 });
- analyzer.setOutputUnigrams(false);
- assertAnalyzesToReuse(analyzer, "please divide this sentence into shingles",
- new String[] { "please divide this",
- "divide this sentence",
- "this sentence into",
- "sentence into shingles" },
- new int[] { 0, 7, 14, 19 },
- new int[] { 18, 27, 32, 41 },
- new int[] { 1, 1, 1, 1 });
- }
-
- public void testNoTokenSeparator() throws Exception {
- ShingleAnalyzerWrapper analyzer
- = new ShingleAnalyzerWrapper(new MockAnalyzer(random, MockTokenizer.WHITESPACE, false));
- analyzer.setTokenSeparator("");
- assertAnalyzesToReuse(analyzer, "please divide into shingles",
- new String[] { "please", "pleasedivide",
- "divide", "divideinto",
- "into", "intoshingles",
- "shingles" },
- new int[] { 0, 0, 7, 7, 14, 14, 19 },
- new int[] { 6, 13, 13, 18, 18, 27, 27 },
- new int[] { 1, 0, 1, 0, 1, 0, 1 });
- analyzer.setOutputUnigrams(false);
- assertAnalyzesToReuse(analyzer, "please divide into shingles",
- new String[] { "pleasedivide",
- "divideinto",
- "intoshingles" },
- new int[] { 0, 7, 14 },
- new int[] { 13, 18, 27 },
- new int[] { 1, 1, 1 });
- }
-
- public void testNullTokenSeparator() throws Exception {
- ShingleAnalyzerWrapper analyzer
- = new ShingleAnalyzerWrapper(new MockAnalyzer(random, MockTokenizer.WHITESPACE, false));
- analyzer.setTokenSeparator(null);
- assertAnalyzesToReuse(analyzer, "please divide into shingles",
- new String[] { "please", "pleasedivide",
- "divide", "divideinto",
- "into", "intoshingles",
- "shingles" },
- new int[] { 0, 0, 7, 7, 14, 14, 19 },
- new int[] { 6, 13, 13, 18, 18, 27, 27 },
- new int[] { 1, 0, 1, 0, 1, 0, 1 });
- analyzer.setOutputUnigrams(false);
- assertAnalyzesToReuse(analyzer, "please divide into shingles",
- new String[] { "pleasedivide",
- "divideinto",
- "intoshingles" },
- new int[] { 0, 7, 14 },
- new int[] { 13, 18, 27 },
- new int[] { 1, 1, 1 });
- }
- public void testAltTokenSeparator() throws Exception {
- ShingleAnalyzerWrapper analyzer
- = new ShingleAnalyzerWrapper(new MockAnalyzer(random, MockTokenizer.WHITESPACE, false));
- analyzer.setTokenSeparator("<SEP>");
- assertAnalyzesToReuse(analyzer, "please divide into shingles",
- new String[] { "please", "please<SEP>divide",
- "divide", "divide<SEP>into",
- "into", "into<SEP>shingles",
- "shingles" },
- new int[] { 0, 0, 7, 7, 14, 14, 19 },
- new int[] { 6, 13, 13, 18, 18, 27, 27 },
- new int[] { 1, 0, 1, 0, 1, 0, 1 });
- analyzer.setOutputUnigrams(false);
- assertAnalyzesToReuse(analyzer, "please divide into shingles",
- new String[] { "please<SEP>divide",
- "divide<SEP>into",
- "into<SEP>shingles" },
- new int[] { 0, 7, 14 },
- new int[] { 13, 18, 27 },
- new int[] { 1, 1, 1 });
- }
-
- public void testOutputUnigramsIfNoShinglesSingleToken() throws Exception {
- ShingleAnalyzerWrapper analyzer
- = new ShingleAnalyzerWrapper(new MockAnalyzer(random, MockTokenizer.WHITESPACE, false));
- analyzer.setOutputUnigrams(false);
- analyzer.setOutputUnigramsIfNoShingles(true);
- assertAnalyzesToReuse(analyzer, "please",
- new String[] { "please" },
- new int[] { 0 },
- new int[] { 6 },
- new int[] { 1 });
- }
-}
fnp / pylucene.git / blobdiff