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RangeQuery.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_RangeQuery_
#define _lucene_search_RangeQuery_
#if defined(_LUCENE_PRAGMA_ONCE)
# pragma once
#endif

#include "SearchHeader.h"
#include "Scorer.h"
#include "TermQuery.h"

#include "CLucene/index/Term.h"
#include "CLucene/index/Terms.h"

#include "CLucene/util/StringBuffer.h"


CL_NS_DEF(search)
    /** Constructs a query selecting all terms greater than
     * <code>lowerTerm</code> but less than <code>upperTerm</code>.
     * There must be at least one term and either term may be null,
     * in which case there is no bound on that side, but if there are
     * two terms, both terms <b>must</b> be for the same field.
     */
00030       class RangeQuery: public Query
    {
    private: 
        CL_NS(index)::Term* lowerTerm;
        CL_NS(index)::Term* upperTerm;
        bool inclusive;
      protected:
            RangeQuery(const RangeQuery& clone);
            
      public:
        // Constructs a query selecting all terms greater than 
        // <code>lowerTerm</code> but less than <code>upperTerm</code>.
        // There must be at least one term and either term may be NULL--
        // in which case there is no bound on that side, but if there are 
        // two term, both terms <b>must</b> be for the same field.
            RangeQuery(CL_NS(index)::Term* LowerTerm, CL_NS(index)::Term* UpperTerm, const bool Inclusive);
            ~RangeQuery();

            const TCHAR* getQueryName() const;
            static const TCHAR* getClassName();

            Query* rewrite(CL_NS(index)::IndexReader* reader);

            Query* combine(Query** queries);
        
        // Prints a user-readable version of this query. 
        TCHAR* toString(const TCHAR* field) const;
        
            Query* clone() const;

            bool equals(Query * other) const;

            CL_NS(index)::Term* getLowerTerm(bool pointer=true) const;
            CL_NS(index)::Term* getUpperTerm(bool pointer=true) const;
            bool isInclusive() const;
        const TCHAR* getField() const;

            size_t hashCode() const;
    };

CL_NS_END
#endif

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