Java Code Examples for

The following examples show how to use These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: lucene-solr   Source File:    License: Apache License 2.0 5 votes vote down vote up
private Independence parseIndependenceMeasure(String expr) {
  if ("ChiSquared".equals(expr)) {
    return new IndependenceChiSquared();
  } else if ("Standardized".equals(expr)) {
    return new IndependenceStandardized();
  } else if ("Saturated".equals(expr)) {
    return new IndependenceSaturated();
  } else {
    throw new RuntimeException("Invalid independence measure: " + expr);
Example 2
Source Project: lucene-solr   Source File:    License: Apache License 2.0 5 votes vote down vote up
 * dfi with no parameters
public void test() throws Exception {
  Similarity sim = getSimilarity("text");
  assertEquals(DFISimilarity.class, sim.getClass());
  DFISimilarity dfi = (DFISimilarity) sim;
  assertTrue(dfi.getIndependence() instanceof IndependenceChiSquared);
Example 3
public void setupIndex() throws IOException {
    dirUnderTest = newDirectory();
    List<Similarity> sims = Arrays.asList(
            new ClassicSimilarity(),
            new SweetSpotSimilarity(), // extends Classic
            new BM25Similarity(),
            new LMDirichletSimilarity(),
            new BooleanSimilarity(),
            new LMJelinekMercerSimilarity(0.2F),
            new AxiomaticF3LOG(0.5F, 10),
            new DFISimilarity(new IndependenceChiSquared()),
            new DFRSimilarity(new BasicModelG(), new AfterEffectB(), new NormalizationH1()),
            new IBSimilarity(new DistributionLL(), new LambdaDF(), new NormalizationH3())
    similarity = sims.get(random().nextInt(sims.size()));

    indexWriterUnderTest = new RandomIndexWriter(random(), dirUnderTest, newIndexWriterConfig().setSimilarity(similarity));
    for (int i = 0; i < docs.length; i++) {
        Document doc = new Document();
        doc.add(newStringField("id", "" + i, Field.Store.YES));
        doc.add(newField("field", docs[i], Store.YES));

    indexReaderUnderTest = indexWriterUnderTest.getReader();
    searcherUnderTest = newSearcher(indexReaderUnderTest);