include/vrvCore/DtAgentFactory.h

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/******************************************************************************* 
** Copyright (c) 2009 MAK Technologies, Inc. 
** All rights reserved. 
*******************************************************************************/ 
/******************************************************************************* 
** $RCSfile: DtAgentFactory.h,v $ $Revision: 1.13 $ $State: Exp $ 
*******************************************************************************/ 
 
 
#pragma once
 
#include <vrvCore/vrvCore.h>
#include <vrvUtil/DtVirtualBaseClass.h>
#include <vrvCore/DtUniqueID.h>

#include <boost/unordered_map.hpp>
#include <string>
#include <list>

namespace makVrv 
{ 

   class DtDe;
   class DtAgentManagerInterface;
   class DtAgentUpdateResolverInterface;
   class DtAgentCreator;
   class DtAgent;

   class DT_DLL_VRVCORE DtAgentFactory : public DtVirtualBaseClass
   {
   public:

      class DtAutoUnregistrar
      {
      public:
         DtAutoUnregistrar( const std::string& className )
            : myClassName( className )
         {
         };

         ~DtAutoUnregistrar()
         {
            DtAgentFactory::autoUnregister( myClassName );
         }
      private:
         std::string myClassName;
      };

      typedef DtAgentCreator* (*AutoRegisterFunction)();

      static DtAgentFactory& instance(DtDe& de);

      virtual ~DtAgentFactory();

      virtual void registerAgentCreator(const std::string& className,
         DtAgentCreator* creator);

      virtual DtAgent* createAgent(const std::string& className, 
         DtAgentManagerInterface& sceneInterface) const;

      virtual DtAgentUpdateResolverInterface* createResolver(const std::string& className, DtUniqueID id) const;

      virtual void processAutoUnregisters();

      static bool autoRegister(const std::string& className,AutoRegisterFunction function );
      static void autoUnregister( const std::string& className );

   protected:
      DtAgentFactory(DtDe& de);


   protected:
      typedef boost::unordered_map<std::string,DtAgentCreator*> RegistrationMap;
      typedef boost::unordered_map<std::string,AutoRegisterFunction> AutoRegistrationMap;
      typedef std::list<std::string> RemoveList;

      DtDe& myDe;
      RegistrationMap myTypes;

      static AutoRegistrationMap& autoTypes();
      static RemoveList& removeTypes();
      static bool& destructed();
   };
}