---

lknullvalue.h

/* liblookdb: lknullvalue.h - NULL Value representation for parameters 
    Copyright (C) 1998-2001 LOOK Systems

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
#ifndef LIBLOOKDB_LKNULLVALUE_H
#define LIBLOOKDB_LKNULLVALUE_H

// $Id: lknullvalue.h,v 1.4 2001/07/04 15:53:19 clive Exp $

#include "looktypes.h"
#include "lktypebase.h"

namespace look {

// *****************************************************
// LookNULLValue class
// note nulls as parameters still need to know their type (grr..)
// *****************************************************


class LOOKTYPES_DLL LookNULLValue : public LookTypeBase
{
public:
// Constructor.
        LookNULLValue( long theColumnType = LookNULLValueID );

// Destructor.
        ~LookNULLValue( void );

// Copy constructor.
        LookNULLValue( const LookNULLValue &theOther );

// Assignment operators
        LookNULLValue& operator=( const LookNULLValue &theOther );

// get a copy
        LookTypeBase* GetNewCopy( void ) const;

// get my id
        long GetTypeID( void ) const;

        long GetColumnType( void ) const
        {
                return itsColumnType;
        }

        void SetColumnType( long theType )
        {
                itsColumnType = theType;
        }

protected:


        long itsColumnType;

};


} // end of "look" namespace
#endif

---