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#ifndef OPENTISSUE_UTILITY_UTILITY_CLASS_ID_H
#define OPENTISSUE_UTILITY_UTILITY_CLASS_ID_H
//
// OpenTissue Template Library
// - A generic toolbox for physics-based modeling and simulation.
// Copyright (C) 2008 Department of Computer Science, University of Copenhagen.
//
// OTTL is licensed under zlib: http://opensource.org/licenses/zlib-license.php
//
#include <OpenTissue/configuration.h>

namespace OpenTissue
{
  namespace utility
  {

    class BaseIDGenerator
    {

      template < class T >
      friend class ClassID;

    private:

      BaseIDGenerator(); // Disable default constructor

      static size_t const generate_id()
      {
        static size_t id = 0;
        return id++;
      }

    };


    class ClassIDInterface
    {
    public:

      virtual ~ClassIDInterface(){}

      virtual size_t const class_id() const = 0;
    };



    template < class T >
    class ClassID
      : virtual public ClassIDInterface
    {
    public:

      static size_t const id()
      {
        static size_t my_id = BaseIDGenerator::generate_id();
        return my_id;
      }

      virtual size_t const class_id() const
      {
        return id();
      }
    };

    template <  class Base, class Self >
    class ClassIDCompositor
      : public Base
      , public ClassID<Self>
    {
    public:

      static size_t const id()
      {
        return ClassID<Self>::id();
      }

      virtual size_t const class_id() const
      {
        return ClassID<Self>::id();
      }
    };

  } // namespace utility
} // namespace OpenTissue
// OPENTISSUE_UTILITY_UTILITY_CLASS_ID_H
#endif