Examples of org.apache.lucene.search.FilterClause

org.apache.lucene.search.FilterClause
A Filter that wrapped with an indication of how that filter is used when composed with another filter. (Follows the boolean logic in BooleanClause for composition of queries.) @author BPDThebault

  {
    for (int i = 0; i < 2; i++) {
      boolean old = (i==0);


      BooleanFilter booleanFilter = new BooleanFilter();
      booleanFilter.add(new FilterClause(getTermsFilter("accessRights", "admin", old),BooleanClause.Occur.MUST));
      tstFilterCard("MUST",3,booleanFilter);
    }
  }

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  {
    for (int i = 0; i < 2; i++) {
      boolean old = (i==0);


      BooleanFilter booleanFilter = new BooleanFilter();
      booleanFilter.add(new FilterClause(getTermsFilter("inStock","N", old),BooleanClause.Occur.MUST_NOT));
      tstFilterCard("MUST_NOT",4,booleanFilter);
    }
  }

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  {
    for (int i = 0; i < 2; i++) {
      boolean old = (i==0);


      BooleanFilter booleanFilter = new BooleanFilter();
      booleanFilter.add(new FilterClause(getTermsFilter("inStock","N", old),BooleanClause.Occur.MUST));
      booleanFilter.add(new FilterClause(getTermsFilter("price","030", old),BooleanClause.Occur.MUST_NOT));
      tstFilterCard("MUST_NOT wins over MUST for same docs",0,booleanFilter);
    }
  }

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      Filter lastFilter = null;
      int count = 0;
      for (Filter filter : filters) {
        if (filter != null) {
          booleanFilter.add(new FilterClause(
              filter, BooleanClause.Occur.SHOULD));
          count += 1;
          lastFilter = filter;
        }
      }

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    Filter lastFilter = null;
    int count = 0;
    for (Filter filter : filters) {
      if (filter != null) {
        booleanFilter.add(new FilterClause(filter, BooleanClause.Occur.MUST));
        count += 1;
        lastFilter = filter;
      }
    }

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   * @param filter the filter to return the opposite of
   * @return the negated filter
   */
  public static Filter not(final Filter filter) {
    final BooleanFilter booleanFilter = new BooleanFilter();
    booleanFilter.add(new FilterClause(filter, BooleanClause.Occur.MUST_NOT));
    return booleanFilter;
  }

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