X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/test/org/apache/lucene/analysis/query/QueryAutoStopWordAnalyzerTest.java diff --git a/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/test/org/apache/lucene/analysis/query/QueryAutoStopWordAnalyzerTest.java b/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/test/org/apache/lucene/analysis/query/QueryAutoStopWordAnalyzerTest.java new file mode 100644 index 0000000..0a802a2 --- /dev/null +++ b/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/test/org/apache/lucene/analysis/query/QueryAutoStopWordAnalyzerTest.java @@ -0,0 +1,172 @@ +package org.apache.lucene.analysis.query; +/** + * 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 java.io.Reader; +import java.io.StringReader; +import java.util.Arrays; +import java.util.Collections; + +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.document.Document; +import org.apache.lucene.document.Field; +import org.apache.lucene.index.IndexReader; +import org.apache.lucene.index.IndexWriter; +import org.apache.lucene.index.IndexWriterConfig; +import org.apache.lucene.index.Term; +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.store.RAMDirectory; + +public class QueryAutoStopWordAnalyzerTest extends BaseTokenStreamTestCase { + String variedFieldValues[] = {"the", "quick", "brown", "fox", "jumped", "over", "the", "lazy", "boring", "dog"}; + String repetitiveFieldValues[] = {"boring", "boring", "vaguelyboring"}; + RAMDirectory dir; + Analyzer appAnalyzer; + IndexReader reader; + QueryAutoStopWordAnalyzer protectedAnalyzer; + + @Override + public void setUp() throws Exception { + super.setUp(); + dir = new RAMDirectory(); + appAnalyzer = new MockAnalyzer(random, MockTokenizer.WHITESPACE, false); + IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(TEST_VERSION_CURRENT, appAnalyzer)); + int numDocs = 200; + for (int i = 0; i < numDocs; i++) { + Document doc = new Document(); + String variedFieldValue = variedFieldValues[i % variedFieldValues.length]; + String repetitiveFieldValue = repetitiveFieldValues[i % repetitiveFieldValues.length]; + doc.add(new Field("variedField", variedFieldValue, Field.Store.YES, Field.Index.ANALYZED)); + doc.add(new Field("repetitiveField", repetitiveFieldValue, Field.Store.YES, Field.Index.ANALYZED)); + writer.addDocument(doc); + } + writer.close(); + reader = IndexReader.open(dir, true); + } + + @Override + public void tearDown() throws Exception { + reader.close(); + super.tearDown(); + } + + //Helper method to query + private int search(Analyzer a, String queryString) throws IOException, ParseException { + QueryParser qp = new QueryParser(TEST_VERSION_CURRENT, "repetitiveField", a); + Query q = qp.parse(queryString); + IndexSearcher searcher = newSearcher(reader); + int hits = searcher.search(q, null, 1000).totalHits; + searcher.close(); + return hits; + } + + public void testNoStopwords() throws Exception { + // Note: an empty list of fields passed in + protectedAnalyzer = new QueryAutoStopWordAnalyzer(TEST_VERSION_CURRENT, appAnalyzer, reader, Collections.emptyList(), 1); + String query = "variedField:quick repetitiveField:boring"; + int numHits1 = search(protectedAnalyzer, query); + int numHits2 = search(appAnalyzer, query); + assertEquals("No filtering test", numHits1, numHits2); + } + + public void testDefaultStopwordsAllFields() throws Exception { + protectedAnalyzer = new QueryAutoStopWordAnalyzer(TEST_VERSION_CURRENT, appAnalyzer, reader); + int numHits = search(protectedAnalyzer, "repetitiveField:boring"); + assertEquals("Default filter should remove all docs", 0, numHits); + } + + public void testStopwordsAllFieldsMaxPercentDocs() throws Exception { + protectedAnalyzer = new QueryAutoStopWordAnalyzer(TEST_VERSION_CURRENT, appAnalyzer, reader, 1f / 2f); + int numHits = search(protectedAnalyzer, "repetitiveField:boring"); + assertEquals("A filter on terms in > one half of docs remove boring docs", 0, numHits); + + numHits = search(protectedAnalyzer, "repetitiveField:vaguelyboring"); + assertTrue("A filter on terms in > half of docs should not remove vaguelyBoring docs", numHits > 1); + + protectedAnalyzer = new QueryAutoStopWordAnalyzer(TEST_VERSION_CURRENT, appAnalyzer, reader, 1f / 4f); + numHits = search(protectedAnalyzer, "repetitiveField:vaguelyboring"); + assertEquals("A filter on terms in > quarter of docs should remove vaguelyBoring docs", 0, numHits); + } + + public void testStopwordsPerFieldMaxPercentDocs() throws Exception { + protectedAnalyzer = new QueryAutoStopWordAnalyzer(TEST_VERSION_CURRENT, appAnalyzer, reader, Arrays.asList("variedField"), 1f / 2f); + int numHits = search(protectedAnalyzer, "repetitiveField:boring"); + assertTrue("A filter on one Field should not affect queris on another", numHits > 0); + + protectedAnalyzer = new QueryAutoStopWordAnalyzer(TEST_VERSION_CURRENT, appAnalyzer, reader, Arrays.asList("variedField", "repetitiveField"), 1f / 2f); + numHits = search(protectedAnalyzer, "repetitiveField:boring"); + assertEquals("A filter on the right Field should affect queries on it", numHits, 0); + } + + public void testStopwordsPerFieldMaxDocFreq() throws Exception { + protectedAnalyzer = new QueryAutoStopWordAnalyzer(TEST_VERSION_CURRENT, appAnalyzer, reader, Arrays.asList("repetitiveField"), 10); + int numStopWords = protectedAnalyzer.getStopWords("repetitiveField").length; + assertTrue("Should have identified stop words", numStopWords > 0); + + protectedAnalyzer = new QueryAutoStopWordAnalyzer(TEST_VERSION_CURRENT, appAnalyzer, reader, Arrays.asList("repetitiveField", "variedField"), 10); + int numNewStopWords = protectedAnalyzer.getStopWords("repetitiveField").length + protectedAnalyzer.getStopWords("variedField").length; + assertTrue("Should have identified more stop words", numNewStopWords > numStopWords); + } + + public void testNoFieldNamePollution() throws Exception { + protectedAnalyzer = new QueryAutoStopWordAnalyzer(TEST_VERSION_CURRENT, appAnalyzer, reader, Arrays.asList("repetitiveField"), 10); + int numHits = search(protectedAnalyzer, "repetitiveField:boring"); + assertEquals("Check filter set up OK", 0, numHits); + + numHits = search(protectedAnalyzer, "variedField:boring"); + assertTrue("Filter should not prevent stopwords in one field being used in another ", numHits > 0); + } + + /* + * 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 testWrappingNonReusableAnalyzer() throws Exception { + QueryAutoStopWordAnalyzer a = new QueryAutoStopWordAnalyzer(TEST_VERSION_CURRENT, new NonreusableAnalyzer(), reader, 10); + int numHits = search(a, "repetitiveField:boring"); + assertTrue(numHits == 0); + numHits = search(a, "repetitiveField:vaguelyboring"); + assertTrue(numHits == 0); + } + + public void testTokenStream() throws Exception { + QueryAutoStopWordAnalyzer a = new QueryAutoStopWordAnalyzer( + TEST_VERSION_CURRENT, + new MockAnalyzer(random, MockTokenizer.WHITESPACE, false), reader, 10); + TokenStream ts = a.tokenStream("repetitiveField", new StringReader("this boring")); + assertTokenStreamContents(ts, new String[] { "this" }); + } +}