Package org.apache.lucene.search.similarities

Examples of org.apache.lucene.search.similarities.DefaultSimilarity

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        try {
          // a little hackish, QueryUtils.check is too costly to do on bigSearcher in this loop.
          searcher.setSimilarity(bigSearcher.getSimilarity()); // random sim
          QueryUtils.check(random(), q1, searcher);
        } finally {
          searcher.setSimilarity(new DefaultSimilarity()); // restore
        }

        TopFieldCollector collector = TopFieldCollector.create(sort, 1000,
            false, true, true, true);
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  public void testSlopScoring() throws IOException {
    Directory directory = newDirectory();
    RandomIndexWriter writer = new RandomIndexWriter(random(), directory,
        newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()))
          .setMergePolicy(newLogMergePolicy())
          .setSimilarity(new DefaultSimilarity()));

    Document doc = new Document();
    doc.add(newTextField("field", "foo firstname lastname foo", Field.Store.YES));
    writer.addDocument(doc);
   
    Document doc2 = new Document();
    doc2.add(newTextField("field", "foo firstname zzz lastname foo", Field.Store.YES));
    writer.addDocument(doc2);
   
    Document doc3 = new Document();
    doc3.add(newTextField("field", "foo firstname zzz yyy lastname foo", Field.Store.YES));
    writer.addDocument(doc3);
   
    IndexReader reader = writer.getReader();
    writer.close();

    IndexSearcher searcher = newSearcher(reader);
    searcher.setSimilarity(new DefaultSimilarity());
    PhraseQuery query = new PhraseQuery();
    query.add(new Term("field", "firstname"));
    query.add(new Term("field", "lastname"));
    query.setSlop(Integer.MAX_VALUE);
    ScoreDoc[] hits = searcher.search(query, null, 1000).scoreDocs;
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    add("This is a test", "object", writer);
    add("a note", "note", writer);
   
    IndexReader reader = writer.getReader();
    IndexSearcher searcher = newSearcher(reader);
    searcher.setSimilarity(new DefaultSimilarity() {
      @Override
      public Explanation idfExplain(CollectionStatistics collectionStats, TermStatistics termStats[]) {
        return new Explanation(10f, "just a test");
      }
    });
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  public void testReallyNoNormsForDrillDown() throws Exception {
    Directory dir = newDirectory();
    Directory taxoDir = newDirectory();
    IndexWriterConfig iwc = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()));
    iwc.setSimilarity(new PerFieldSimilarityWrapper() {
        final Similarity sim = new DefaultSimilarity();

        @Override
        public Similarity get(String name) {
          assertEquals("field", name);
          return sim;
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    restoreProperties.put("user.timezone", System.getProperty("user.timezone"));
    savedTimeZone = TimeZone.getDefault();
    TimeZone randomTimeZone = randomTimeZone(random());
    timeZone = testTimeZone.equals("random") ? randomTimeZone : TimeZone.getTimeZone(testTimeZone);
    TimeZone.setDefault(timeZone);
    similarity = random().nextBoolean() ? new DefaultSimilarity() : new RandomSimilarityProvider(random());

    // Check codec restrictions once at class level.
    try {
      checkCodecRestrictions(codec);
    } catch (AssumptionViolatedException e) {
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    IndexWriter writer = new IndexWriter(
        directory,
        newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())).
            setMaxBufferedDocs(2).
            setMergePolicy(newLogMergePolicy(1000)).
            setSimilarity(new DefaultSimilarity())
    );
    writer.addDocument(adoc(new String[] {"id", "a", "title", "ipod", "str_s", "a"}));
    writer.addDocument(adoc(new String[] {"id", "b", "title", "ipod ipod", "str_s", "b"}));
    writer.addDocument(adoc(new String[] {"id", "c", "title", "ipod ipod ipod", "str_s","c"}));
    writer.addDocument(adoc(new String[] {"id", "x", "title", "boosted", "str_s", "x"}));
    writer.addDocument(adoc(new String[] {"id", "y", "title", "boosted boosted", "str_s","y"}));
    writer.addDocument(adoc(new String[] {"id", "z", "title", "boosted boosted boosted","str_s", "z"}));

    IndexReader r = DirectoryReader.open(writer, true);
    writer.close();

    IndexSearcher searcher = newSearcher(r);
    searcher.setSimilarity(new DefaultSimilarity());

    runTest(searcher, true);
    runTest(searcher, false);

    r.close();
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    restoreProperties.put("user.timezone", System.getProperty("user.timezone"));
    savedTimeZone = TimeZone.getDefault();
    TimeZone randomTimeZone = randomTimeZone(random());
    timeZone = testTimeZone.equals("random") ? randomTimeZone : TimeZone.getTimeZone(testTimeZone);
    TimeZone.setDefault(timeZone);
    similarity = random().nextBoolean() ? new DefaultSimilarity() : new RandomSimilarityProvider(random());

    // Check codec restrictions once at class level.
    try {
      checkCodecRestrictions(codec);
    } catch (AssumptionViolatedException e) {
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    add("This is a test", "object", writer);
    add("a note", "note", writer);
   
    IndexReader reader = writer.getReader();
    IndexSearcher searcher = newSearcher(reader);
    searcher.setSimilarity(new DefaultSimilarity() {
      @Override
      public Explanation idfExplain(CollectionStatistics collectionStats, TermStatistics termStats[]) {
        return new Explanation(10f, "just a test");
      }
    });
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      reader = writer.getReader();
      writer.close();
      searcher = newSearcher(reader);
     
      // set a similarity that does not normalize our boost away
      searcher.setSimilarity(new DefaultSimilarity() {
        @Override
        public float queryNorm(float sumOfSquaredWeights) {
          return 1.0f;
        }
      });
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  public void testReallyNoNormsForDrillDown() throws Exception {
    Directory dir = newDirectory();
    Directory taxoDir = newDirectory();
    IndexWriterConfig iwc = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()));
    iwc.setSimilarity(new PerFieldSimilarityWrapper() {
        final Similarity sim = new DefaultSimilarity();

        @Override
        public Similarity get(String name) {
          assertEquals("field", name);
          return sim;
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