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RangeFilter.h

/*------------------------------------------------------------------------------
* Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team
* 
* Distributable under the terms of either the Apache License (Version 2.0) or 
* the GNU Lesser General Public License, as specified in the COPYING file.
------------------------------------------------------------------------------*/

#ifndef _lucene_search_RangeFilter_
#define _lucene_search_RangeFilter_

#include "CLucene/document/DateField.h"
#include "CLucene/index/Term.h"
#include "CLucene/index/Terms.h"
#include "CLucene/index/IndexReader.h"
#include "CLucene/util/BitSet.h"
#include "CLucene/search/Filter.h"

CL_NS_DEF(search)

class RangeFilter: public Filter 
{
private:
      const TCHAR* field;
      TCHAR* lowerValue;
      TCHAR* upperValue;
      bool   includeLower;
      bool   includeUpper;
      
protected:
      RangeFilter( const RangeFilter& copy );
      
public:
      RangeFilter( const TCHAR* fieldName, const TCHAR* lowerValue, const TCHAR* upperValue, bool includeLower, bool includeUpper );
      
      static RangeFilter* Less( TCHAR* fieldName, TCHAR* upperTerm );
      
      static RangeFilter* More( TCHAR* fieldName, TCHAR* lowerTerm );
      
      ~RangeFilter();
      
      /** Returns a BitSet with true for documents which should be permitted in
      search results, and false for those that should not. */
      CL_NS(util)::BitSet* bits( CL_NS(index)::IndexReader* reader );
      
      Filter* clone() const;
      
      TCHAR* toString();
};

CL_NS_END
#endif

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