DtVirtualBaseClassCreator.h

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/******************************************************************************
 * Copyright (c) 2020 MAK Technologies, Inc.
 * All rights reserved.
 ******************************************************************************/
 
#pragma once

#include <vrvCore/vrvCore.h>
#include <vrvCore/DtDe.h>

namespace makVrv
{
   template<class T>
   class DtVirtualBaseClassCreator : public DtVirtualBaseClass
   {
   public:
      virtual ~DtVirtualBaseClassCreator();

      static DtVirtualBaseClassCreator& instance(DtDe& de);

      virtual T* create();

   protected:
      DtVirtualBaseClassCreator(DtDe& de);

   protected:
      DtDe& myDe;
   };

   template <typename T>
   inline const char* creatorTypeName(void) { return "unknown"; }

   template<class T>
   DtVirtualBaseClassCreator<T>::DtVirtualBaseClassCreator(DtDe& de)
      : myDe(de)
   {

   }

   template<class T>
   DtVirtualBaseClassCreator<T>::~DtVirtualBaseClassCreator()
   {

   }

   template<class T>
   DtVirtualBaseClassCreator<T>& DtVirtualBaseClassCreator<T>::instance(DtDe& de)
   {
      std::string creatorType = creatorTypeName<T>();
      DtVirtualBaseClassCreator<T>* inst = dynamic_cast<DtVirtualBaseClassCreator<T>*>(
         de.findInstance(creatorType));
      if (!inst)
      {
         inst = new DtVirtualBaseClassCreator<T>(de);
         de.registerInstance(creatorType, inst);
      }
      return *inst;
   }

   template<class T>
   T* DtVirtualBaseClassCreator<T>::create()
   {
      return new T(myDe);
   }

}