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tResult.h

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/******************************************************************************/
/*                                                                            */
/* POLiTe - Persistent Object Library Test                                    */
/*                                        Ph.D. Thesis by Mgr. Michal Kopecky */
/*                                                                            */
/* Charles University Prague                                                  */
/*                                                                            */
/******************************************************************************/
/*                                                                            */
/* File name: ...                                                             */
/* Module: ......                                                             */
/*                                                                            */
/******************************************************************************/

#ifndef __T_RESULT_H__
#define __T_RESULT_H__

template<class T> class Result;

// Parent Header(s)
#include <cResultBase.h>

// Other POLiTe Header(s)
#include <tRef.h>

template<class T> class Result: public ResultBase
{
#ifdef POLITE_TEST_FRIEND
        friend POLITE_TEST_FRIEND;
#endif // POLITE_TEST_FRIEND

public:
        Result() : ResultBase()
        {};

        T *operator ->()
        //Returns the pointer to the pointed object
        //which will be read from the database, if the object
        //is not present in memory yet.
        {
                if (*this == DBNULL)
                        throw ObjLibException_NotFound();
                return IsPersistent() ? (T *)ObjectCache.GetReferencedObject(*this) : (T *)_Object();
        };

        T &operator *()
        //Returns the pointed object
        //which will be read from the database, if the object
        //is not present in memory yet.
        {
                if (*this == DBNULL)
                        throw ObjLibException_NotFound();
                return IsPersistent() ? *(T *)ObjectCache.GetReferencedObject(*this) : *(T *)_Object();
        };

};

#endif //__T_RESULT_H__

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