virtualConstructor.h

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/******************************************************************************
** Copyright (c) 2007 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/
/******************************************************************************
** $RCSfile: virtualConstructor.h,v $ $Revision: 1.6 $ $State: Exp $
******************************************************************************/



#ifndef virtualConstructor_H__
#define virtualConstructor_H__

#include <vlutil/vlExceptions.h>

#define DT_VIRTUAL_CTR( CLASS_NAME , ARG_TYPES_LIST ) \
   typedef CLASS_NAME* (*creatorFunction)ARG_TYPES_LIST;\
   static CLASS_NAME* create ARG_TYPES_LIST;\
   static creatorFunction theCreator;\
   static void setCreator(creatorFunction);\
   /*lint -e{1736}*/\
protected:\
   explicit CLASS_NAME ARG_TYPES_LIST;\
public:

#define DT_VIRTUAL_COPY_ASSIGN( CLASS_NAME ) \
   typedef CLASS_NAME* (*copierFunction)(const CLASS_NAME &);\
   typedef CLASS_NAME& (*assignerFunction)(CLASS_NAME&,const CLASS_NAME &);\
   static CLASS_NAME* copy (const CLASS_NAME &);\
   static CLASS_NAME& assign(CLASS_NAME&,const CLASS_NAME &);\
   static copierFunction theCopier;\
   static assignerFunction theAssigner;\
   static void setCopier (copierFunction);\
   static void setAssigner(assignerFunction);\
protected:\
   explicit CLASS_NAME (const CLASS_NAME &);\
   CLASS_NAME& operator=(const CLASS_NAME &);\
public:

#define DT_VIRTUAL_BASE_CTR( BASE_NAME , ARG_TYPES_LIST ) \
   static BASE_NAME* createBase ARG_TYPES_LIST;\
   static void overrideCreator();


#define DT_PURE_VIRTUAL_CTR( CLASS_NAME , ARG_TYPES_LIST )\
   static CLASS_NAME* create ARG_TYPES_LIST;\
   /*lint -e{1736}*/\
public:\
   typedef CLASS_NAME* (*creatorFunction)ARG_TYPES_LIST;\
   static creatorFunction theCreator;\
   static void setCreator(creatorFunction);\
protected:\
   explicit CLASS_NAME ARG_TYPES_LIST;\
public:

#define DT_VIRTUAL_CTR_DEFINE(CLASS_NAME,ARG_TYPES_AND_NAMES_LIST,ARG_NAMES_LIST)\
   CLASS_NAME::creatorFunction CLASS_NAME::theCreator = 0;\
   void CLASS_NAME::setCreator(CLASS_NAME::creatorFunction aCreatorFunc)\
   {\
   theCreator = aCreatorFunc;\
   }\
   CLASS_NAME* CLASS_NAME::create ARG_TYPES_AND_NAMES_LIST \
   {\
      if(theCreator)\
         return theCreator ARG_NAMES_LIST;\
      else\
         return new CLASS_NAME ARG_NAMES_LIST;\
   }


#define DT_VIRTUAL_COPY_ASSIGN_DEFINE(CLASS_NAME)\
   CLASS_NAME::copierFunction CLASS_NAME::theCopier = 0;\
   CLASS_NAME::assignerFunction CLASS_NAME::theAssigner = 0;\
   void CLASS_NAME::setCopier(CLASS_NAME::copierFunction aCopierFunc)\
   {\
   theCopier = aCopierFunc;\
   }\
   void CLASS_NAME::setAssigner(CLASS_NAME::assignerFunction anAssignerFunc)\
   {\
   theAssigner = anAssignerFunc;\
   }\
   CLASS_NAME* CLASS_NAME::copy ( const CLASS_NAME & orig ) \
   {\
   if(theCopier)\
      return theCopier (orig);\
   else\
      return new CLASS_NAME (orig);\
   }\
   CLASS_NAME& CLASS_NAME::assign(CLASS_NAME& toAssign,const CLASS_NAME& orig)\
   {\
   if(theAssigner)\
      return theAssigner(toAssign,orig);\
   else\
      return toAssign = orig;\
   }



#define DT_VIRTUAL_BASE_CTR_DEFINE(CLASS_NAME,BASE_NAME,ARG_TYPES_AND_NAMES_LIST,ARG_NAMES_LIST)\
   BASE_NAME* CLASS_NAME::createBase ARG_TYPES_AND_NAMES_LIST \
   {\
      if(CLASS_NAME::theCreator && (void*)&CLASS_NAME::theCreator != (void*)&BASE_NAME::theCreator)\
         return CLASS_NAME::theCreator ARG_NAMES_LIST;\
      else\
         return new CLASS_NAME ARG_NAMES_LIST;\
   }\
   void CLASS_NAME::overrideCreator() \
   {\
      BASE_NAME::setCreator(&CLASS_NAME::createBase);\
   }

#define DT_PURE_VIRTUAL_CTR_DEFINE(CLASS_NAME,ARG_TYPES_AND_NAMES_LIST,ARG_NAMES_LIST)\
   CLASS_NAME::creatorFunction CLASS_NAME::theCreator = 0;\
   void CLASS_NAME::setCreator(CLASS_NAME::creatorFunction aCreatorFunc)\
   {\
      theCreator = aCreatorFunc;\
   }\
   CLASS_NAME* CLASS_NAME::create ARG_TYPES_AND_NAMES_LIST \
   {\
      if(theCreator && theCreator != CLASS_NAME::create)\
         return theCreator ARG_NAMES_LIST;\
      else\
         throw DtCorruptedState("Class " #CLASS_NAME " has not be defined\n");\
   }

#endif