DtStreamedFeatureManager.h

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/****************************************************************************** 
** Copyright (c) 2020 VT-MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 


#pragma once

#include <vrvCore/vrvCore.h>

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

#include <vrvUtil/DtVirtualBaseClass.h>

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

namespace makVrv
{
   class DT_DLL_VRVCORE DtStreamedFeatureManager
   {
   public:
      friend class DtStreamedFeatureManagerCreator;

      virtual ~DtStreamedFeatureManager();

      virtual void addStreamedFeatureCreator( 
         const std::string& registrantName,
         const std::string& styleName,
         DtStreamedFeatureCreator* creator );

      virtual void checkAndProcessStrandedFeatures() = 0;


      boost::signalslib::signal<void ( const std::string& registrantName, DtUniqueID featurId )> 
         signal_featureAboutToBeDeleted;

   protected:
      DtStreamedFeatureManager( DtDe& de );

      DtStreamedFeatureManager();

   protected:
      DtDe& myDe;

      typedef std::pair<std::string, DtStreamedFeatureCreator*> CreatorElement;
      typedef boost::unordered_multimap<std::string, CreatorElement> FeatureClassCreatorMap;
      typedef std::pair<FeatureClassCreatorMap::iterator,FeatureClassCreatorMap::iterator> RangeIterFeatureClassToCreator;
      typedef std::pair<FeatureClassCreatorMap::const_iterator,FeatureClassCreatorMap::const_iterator> ConstRangeIterFeatureClassToCreator;

      FeatureClassCreatorMap myFeatureClassCreators;
   };

   class DT_DLL_VRVCORE DtStreamedFeatureManagerCreator : public DtVirtualBaseClass
   {

   public:
      DtStreamedFeatureManagerCreator()
      {
      }

      virtual ~DtStreamedFeatureManagerCreator()
      {
      }

      virtual DtStreamedFeatureManager* create( DtDe& de ) = 0;
   };

}