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(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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    if (LIKE_MATCH.equals (mMatch)) {
      if (words.size () > 1) {
        query = new BooleanQuery ();
        for (int i = 0; i < words.size (); i++) {
          ((BooleanQuery)query).add (new FuzzyQuery (new Term (field, (String)words.elementAt(i))), false, false);
        }
      } else if (words.size () == 1) {
        query = new FuzzyQuery (new Term (field, (String)words.elementAt(0)));
      }
    }
   
    if (PHRASE_MATCH.equals (mMatch)) {
      if (words.size () > 1) {
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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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   * @param prefixLength prefix length
   * @return new FuzzyQuery Instance
   */
  protected Query newFuzzyQuery(Term term, float minimumSimilarity, int prefixLength) {
    // FuzzyQuery doesn't yet allow constant score rewrite
    return new FuzzyQuery(term,minimumSimilarity,prefixLength);
  }
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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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  }

  public FuzzyQuery build(QueryNode queryNode) throws QueryNodeException {
    FuzzyQueryNode fuzzyNode = (FuzzyQueryNode) queryNode;

    return new FuzzyQuery(new Term(fuzzyNode.getFieldAsString(), fuzzyNode
        .getTextAsString()), fuzzyNode.getSimilarity(), fuzzyNode
        .getPrefixLength());

  }
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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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  {
    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());

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

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

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    } else if(query instanceof PrefixQuery) {
      MultiTermQuery q = new PrefixQuery(query.getTerm());
      q.setBoost(q.getBoost());
      return q;
    } else if(query instanceof FuzzyQuery) {
      FuzzyQuery q = (FuzzyQuery)query;
      q.setBoost(q.getBoost());
      return new FuzzyQuery(q.getTerm(), q.getMinSimilarity(), q.getPrefixLength());
    }
   
    return query;
  }
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