Package org.apache.lucene.search

Examples of org.apache.lucene.search.FuzzyQuery

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    assertTrue(getQuery("term*", null) instanceof PrefixQuery);
    assertTrue(getQuery("term*^2", null) instanceof PrefixQuery);
    assertTrue(getQuery("term~", null) instanceof FuzzyQuery);
    assertTrue(getQuery("term~0.7", null) instanceof FuzzyQuery);
    FuzzyQuery fq = (FuzzyQuery) getQuery("term~0.7", null);
    assertEquals(1, fq.getMaxEdits());
    assertEquals(FuzzyQuery.defaultPrefixLength, fq.getPrefixLength());
    fq = (FuzzyQuery) getQuery("term~", null);
    assertEquals(2, fq.getMaxEdits());
    assertEquals(FuzzyQuery.defaultPrefixLength, fq.getPrefixLength());

    assertQueryNodeException("term~1.1"); // value > 1, throws exception

    assertTrue(getQuery("term*germ", null) instanceof WildcardQuery);

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      @Override
      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    Query query = new FuzzyQuery(new Term("body", "tets"), 1);
    TopDocs topDocs = searcher.search(query, null, 10, Sort.INDEXORDER);
    assertEquals(2, topDocs.totalHits);
    String snippets[] = highlighter.highlight("body", query, searcher, topDocs);
    assertEquals(2, snippets.length);
    assertEquals("This is a <b>test</b>.", snippets[0]);
    assertEquals("<b>Test</b> a one sentence document.", snippets[1]);
   
    // with prefix
    query = new FuzzyQuery(new Term("body", "tets"), 1, 2);
    topDocs = searcher.search(query, null, 10, Sort.INDEXORDER);
    assertEquals(2, topDocs.totalHits);
    snippets = highlighter.highlight("body", query, searcher, topDocs);
    assertEquals(2, snippets.length);
    assertEquals("This is a <b>test</b>.", snippets[0]);
    assertEquals("<b>Test</b> a one sentence document.", snippets[1]);
   
    // wrong field
    BooleanQuery bq = new BooleanQuery();
    bq.add(new MatchAllDocsQuery(), BooleanClause.Occur.SHOULD);
    bq.add(new FuzzyQuery(new Term("bogus", "tets"), 1), BooleanClause.Occur.SHOULD);
    topDocs = searcher.search(bq, null, 10, Sort.INDEXORDER);
    assertEquals(2, topDocs.totalHits);
    snippets = highlighter.highlight("body", bq, searcher, topDocs);
    assertEquals(2, snippets.length);
    assertEquals("This is a test.", snippets[0]);
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  {
    if (lowercaseExpandedTerms) {
      termStr = termStr.toLowerCase();
    }
    Term t = new Term(field, termStr);
    return new FuzzyQuery(t, minSimilarity, fuzzyPrefixLength);
  }
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    assertTrue(getQuery("term*", null) instanceof PrefixQuery);
    assertTrue(getQuery("term*^2", null) instanceof PrefixQuery);
    assertTrue(getQuery("term~", null) instanceof FuzzyQuery);
    assertTrue(getQuery("term~0.7", null) instanceof FuzzyQuery);
    FuzzyQuery fq = (FuzzyQuery)getQuery("term~0.7", null);
    assertEquals(0.7f, fq.getMinSimilarity(), 0.1f);
    assertEquals(FuzzyQuery.defaultPrefixLength, fq.getPrefixLength());
    fq = (FuzzyQuery)getQuery("term~", null);
    assertEquals(0.5f, fq.getMinSimilarity(), 0.1f);
    assertEquals(FuzzyQuery.defaultPrefixLength, fq.getPrefixLength());
    try {
      getQuery("term~1.1", null);   // value > 1, throws exception
      fail();
    } catch(ParseException pe) {
      // expected exception
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    assertTrue(getQuery("term*", null) instanceof PrefixQuery);
    assertTrue(getQuery("term*^2", null) instanceof PrefixQuery);
    assertTrue(getQuery("term~", null) instanceof FuzzyQuery);
    assertTrue(getQuery("term~0.7", null) instanceof FuzzyQuery);
    FuzzyQuery fq = (FuzzyQuery)getQuery("term~0.7", null);
    assertEquals(0.7f, fq.getMinSimilarity(), 0.1f);
    assertEquals(FuzzyQuery.defaultPrefixLength, fq.getPrefixLength());
    fq = (FuzzyQuery)getQuery("term~", null);
    assertEquals(0.5f, fq.getMinSimilarity(), 0.1f);
    assertEquals(FuzzyQuery.defaultPrefixLength, fq.getPrefixLength());
   
    assertParseException("term~1.1"); // value > 1, throws exception

    assertTrue(getQuery("term*germ", null) instanceof WildcardQuery);

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   * @param minimumSimilarity minimum similarity
   * @param prefixLength prefix length
   * @return new FuzzyQuery Instance
   */
  protected Query newFuzzyQuery(Term term, float minimumSimilarity, int prefixLength) {
    return new FuzzyQuery(term,minimumSimilarity,prefixLength);
  }
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    if (LIKE_MATCH.equals(this.match)) {
      if (words.size() > 1) {
        query = new BooleanQuery();
        for (int i = 0; i < words.size(); i++) {
          ((BooleanQuery)query).add(new FuzzyQuery(new Term(f, (String)words.elementAt(i))), false, false);
        }
      } else if (words.size() == 1) {
        query = new FuzzyQuery(new Term(f, (String)words.elementAt(0)));
      }
    }
   
    if (PHRASE_MATCH.equals (this.match)) {
      if (words.size() > 1) {
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    assertTrue(getQuery("term*", null) instanceof PrefixQuery);
    assertTrue(getQuery("term*^2", null) instanceof PrefixQuery);
    assertTrue(getQuery("term~", null) instanceof FuzzyQuery);
    assertTrue(getQuery("term~0.7", null) instanceof FuzzyQuery);
    FuzzyQuery fq = (FuzzyQuery)getQuery("term~0.7", null);
    assertEquals(0.7f, fq.getMinSimilarity(), 0.1f);
    assertEquals(0, fq.getPrefixLength());
    fq = (FuzzyQuery)getQuery("term~", null);
    assertEquals(0.5f, fq.getMinSimilarity(), 0.1f);
    assertEquals(0, fq.getPrefixLength());
    try {
      getQuery("term~1.1", null);   // value > 1, throws exception
      fail();
    } catch(ParseException pe) {
      // expected exception
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    assertTrue(getQuery("term*", null) instanceof PrefixQuery);
    assertTrue(getQuery("term*^2", null) instanceof PrefixQuery);
    assertTrue(getQuery("term~", null) instanceof FuzzyQuery);
    assertTrue(getQuery("term~0.7", null) instanceof FuzzyQuery);
    FuzzyQuery fq = (FuzzyQuery) getQuery("term~0.7", null);
    assertEquals(0.7f, fq.getMinSimilarity(), 0.1f);
    assertEquals(FuzzyQuery.defaultPrefixLength, fq.getPrefixLength());
    fq = (FuzzyQuery) getQuery("term~", null);
    assertEquals(0.5f, fq.getMinSimilarity(), 0.1f);
    assertEquals(FuzzyQuery.defaultPrefixLength, fq.getPrefixLength());
    try {
      getQuery("term~1.1", null); // value > 1, throws exception
      fail();
    } catch (ParseException pe) {
      // expected exception
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    assertTrue(getQuery("term*", null) instanceof PrefixQuery);
    assertTrue(getQuery("term*^2", null) instanceof PrefixQuery);
    assertTrue(getQuery("term~", null) instanceof FuzzyQuery);
    assertTrue(getQuery("term~0.7", null) instanceof FuzzyQuery);
    FuzzyQuery fq = (FuzzyQuery) getQuery("term~0.7", null);
    assertEquals(0.7f, fq.getMinSimilarity(), 0.1f);
    assertEquals(FuzzyQuery.defaultPrefixLength, fq.getPrefixLength());
    fq = (FuzzyQuery) getQuery("term~", null);
    assertEquals(0.5f, fq.getMinSimilarity(), 0.1f);
    assertEquals(FuzzyQuery.defaultPrefixLength, fq.getPrefixLength());

    assertQueryNodeException("term~1.1"); // value > 1, throws exception

    assertTrue(getQuery("term*germ", null) instanceof WildcardQuery);

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