Examples of org.apache.lucene.search.BooleanClause

org.apache.lucene.search.BooleanClause
A clause in a BooleanQuery.

        TokenStream tokenStream = similarAnalyzer.tokenStream(String.valueOf(IEntity.ALL_FIELDS), new StringReader(value));
        Token token = null;
        while ((token = tokenStream.next()) != null) {
          String termText = new String(token.termBuffer(), 0, token.termLength());
          Term term = new Term(fieldname, termText);
          similarityQuery.add(new BooleanClause(new FuzzyQuery(term), Occur.MUST));
        }


        return similarityQuery;
      }
    }

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  private BooleanClause createIsCopyTermQuery(boolean copy) {
    String field = String.valueOf(INews.PARENT_ID);
    TermQuery termQuery = new TermQuery(new Term(field, NumberTools.longToString(0)));
    Occur occur = copy ? Occur.MUST_NOT : Occur.MUST;
    return new BooleanClause(termQuery, occur);
  }

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            if (boost != null) {
              q.setBoost(boost.floatValue());
            }
          }
          applySlop(q,slop);
          clauses.add(new BooleanClause(q, BooleanClause.Occur.SHOULD));
        }
      }
      if (clauses.size() == 0)  // happens for stopwords
        return null;
      return getBooleanQuery(clauses, true);

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  protected Query getFuzzyQuery(String field, String termStr, float minSimilarity) throws ParseException
  {
    if (field == null) {
      List<BooleanClause> clauses = new ArrayList<BooleanClause>();
      for (int i = 0; i < fields.length; i++) {
        clauses.add(new BooleanClause(getFuzzyQuery(fields[i], termStr, minSimilarity),
            BooleanClause.Occur.SHOULD));
      }
      return getBooleanQuery(clauses, true);
    }
    return super.getFuzzyQuery(field, termStr, minSimilarity);

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  protected Query getPrefixQuery(String field, String termStr) throws ParseException
  {
    if (field == null) {
      List<BooleanClause> clauses = new ArrayList<BooleanClause>();
      for (int i = 0; i < fields.length; i++) {
        clauses.add(new BooleanClause(getPrefixQuery(fields[i], termStr),
            BooleanClause.Occur.SHOULD));
      }
      return getBooleanQuery(clauses, true);
    }
    return super.getPrefixQuery(field, termStr);

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  protected Query getWildcardQuery(String field, String termStr) throws ParseException {
    if (field == null) {
      List<BooleanClause> clauses = new ArrayList<BooleanClause>();
      for (int i = 0; i < fields.length; i++) {
        clauses.add(new BooleanClause(getWildcardQuery(fields[i], termStr),
            BooleanClause.Occur.SHOULD));
      }
      return getBooleanQuery(clauses, true);
    }
    return super.getWildcardQuery(field, termStr);

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  protected Query getRangeQuery(String field, String part1, String part2, boolean inclusive) throws ParseException {
    if (field == null) {
      List<BooleanClause> clauses = new ArrayList<BooleanClause>();
      for (int i = 0; i < fields.length; i++) {
        clauses.add(new BooleanClause(getRangeQuery(fields[i], part1, part2, inclusive),
            BooleanClause.Occur.SHOULD));
      }
      return getBooleanQuery(clauses, true);
    }
    return super.getRangeQuery(field, part1, part2, inclusive);

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  public void testNoPayload() throws Exception {
    PayloadTermQuery q1 = new PayloadTermQuery(new Term(PayloadHelper.NO_PAYLOAD_FIELD, "zero"),
            new MaxPayloadFunction());
    PayloadTermQuery q2 = new PayloadTermQuery(new Term(PayloadHelper.NO_PAYLOAD_FIELD, "foo"),
            new MaxPayloadFunction());
    BooleanClause c1 = new BooleanClause(q1, BooleanClause.Occur.MUST);
    BooleanClause c2 = new BooleanClause(q2, BooleanClause.Occur.MUST_NOT);
    BooleanQuery query = new BooleanQuery();
    query.add(c1);
    query.add(c2);
    TopDocs hits = searcher.search(query, null, 100);
    assertTrue("hits is null and it shouldn't be", hits != null);

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    boolean required, prohibited;


    // If this term is introduced by AND, make the preceding term required,
    // unless it's already prohibited
    if (clauses.size() > 0 && conj == CONJ_AND) {
      BooleanClause c = clauses.get(clauses.size()-1);
      if (!c.isProhibited())
        c.setOccur(BooleanClause.Occur.MUST);
    }


    if (clauses.size() > 0 && operator == AND_OPERATOR && conj == CONJ_OR) {
      // If this term is introduced by OR, make the preceding term optional,
      // unless it's prohibited (that means we leave -a OR b but +a OR b-->a OR b)
      // notice if the input is a OR b, first term is parsed as required; without
      // this modification a OR b would parsed as +a OR b
      BooleanClause c = clauses.get(clauses.size()-1);
      if (!c.isProhibited())
        c.setOccur(BooleanClause.Occur.SHOULD);
    }


    // We might have been passed a null query; the term might have been
    // filtered away by the analyzer.
    if (q == null)

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  * @param q sub query
  * @param occur how this clause should occur when matching documents
  * @return new BooleanClause instance
  */
  protected BooleanClause newBooleanClause(Query q, BooleanClause.Occur occur) {
    return new BooleanClause(q, occur);
  }

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