DerivedNodeFactory.hpp

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/*
---------------------------------------------------------------------------
 
    This file is part of uHAL.
 
    uHAL is a hardware access library and programming framework
    originally developed for upgrades of the Level-1 trigger of the CMS
    experiment at CERN.
 
    uHAL is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    uHAL is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with uHAL.  If not, see <http://www.gnu.org/licenses/>.
 
 
      Andrew Rose, Imperial College, London
      email: awr01 <AT> imperial.ac.uk
 
      Marc Magrans de Abril, CERN
      email: marc.magrans.de.abril <AT> cern.ch
 
---------------------------------------------------------------------------
*/
 
#ifndef _uhal_DerivedNodeFactory_hpp_
#define _uhal_DerivedNodeFactory_hpp_
 
 
#include <memory>
#include <string>
#include <unordered_map>
 
 
namespace uhal
{
  class Node;
  class NodeTreeBuilder;   // IWYU pragma: keep
 
  template< typename T > struct RegistrationHelper;   // IWYU pragma: keep
 
 
  class DerivedNodeFactory
  {
    friend class NodeTreeBuilder;
 
    public:
 
      template< typename T > friend struct RegistrationHelper;
 
    private:
      DerivedNodeFactory ();
 
    public:
 
      DerivedNodeFactory(const DerivedNodeFactory&) = delete;
      DerivedNodeFactory& operator=(const DerivedNodeFactory&) = delete;
 
      virtual ~DerivedNodeFactory ();
 
      static DerivedNodeFactory& getInstance();
 
 
    private:
 
      Node* convertToClassType( Node* aNode );
 
      template <class T>
      void add ( const std::string& aNodeClassName );
 
 
      class CreatorInterface
      {
        public:
          CreatorInterface()
          {
          }
 
          virtual ~CreatorInterface()
          {
          }
 
          virtual Node* create ( const Node& aNode ) = 0;
      };
 
 
      template <class T>
      class Creator: public CreatorInterface
      {
        public:
 
          Creator()
          {
          }
 
          virtual ~Creator()
          {
          }
 
          Node* create ( const Node& aNode );
      };
 
 
    private:
      static std::shared_ptr<DerivedNodeFactory> mInstance;
 
      std::unordered_map< std::string , std::shared_ptr< CreatorInterface > > mCreators;
  };
}
 
#include "uhal/TemplateDefinitions/DerivedNodeFactory.hxx"
 
#endif