Java 类org.apache.lucene.search.similarities.DFISimilarity 实例源码

public DFISimilarityProvider(String name, Settings settings, Settings indexSettings) {
    super(name);
    boolean discountOverlaps = settings.getAsBooleanLenientForPreEs6Indices(
        Version.indexCreated(indexSettings), "discount_overlaps", true, new DeprecationLogger(ESLoggerFactory.getLogger(getClass())));
    Independence measure = parseIndependence(settings);
    this.similarity = new DFISimilarity(measure);
    this.similarity.setDiscountOverlaps(discountOverlaps);
}

@Inject
public DFISimilarityProvider(@Assisted String name, @Assisted Settings settings) {
    super(name);
    boolean discountOverlaps = settings.getAsBoolean("discount_overlaps", true);
    Independence measure = parseIndependence(settings);
    this.similarity = new DFISimilarity(measure);
    this.similarity.setDiscountOverlaps(discountOverlaps);
}

@Before
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 BasicModelBE(), 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));
        indexWriterUnderTest.addDocument(doc);
    }
    indexWriterUnderTest.commit();
    indexWriterUnderTest.forceMerge(1);
    indexWriterUnderTest.flush();


    indexReaderUnderTest = indexWriterUnderTest.getReader();
    searcherUnderTest = newSearcher(indexReaderUnderTest);
    searcherUnderTest.setSimilarity(similarity);
}