projectionRegister4MultiDim.h

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 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
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#ifndef GUM_PROJECTION_REGISTER_4_MULTI_DIM_H
#define GUM_PROJECTION_REGISTER_4_MULTI_DIM_H
 
#include <atomic>
#include <iostream>
#include <string>
#include <utility>
 
#include <agrum/base/variables/discreteVariable.h>
 
#include <string_view>
 
namespace gum {
 
  // the base object used by the projections
  template < typename GUM_ELEMENT >
  class MultiDimImplementation;
 
  // ===========================================================================
  // ===                  GUM_MULTI_DIM_PROJECTION_REGISTER                  ===
  // ===========================================================================
  // clang-format off
  // clang-format on
 
  template < typename GUM_ELEMENT >
  class ProjectionRegister4MultiDim {
    public:
    using ProjectionPtr
        = MultiDimImplementation< GUM_ELEMENT >* (*)(const MultiDimImplementation< GUM_ELEMENT >*,
                                                     const gum::VariableSet&);
 
    // ========================================================================
    // ========================================================================

    void insert(std::string_view projection_name,
                std::string_view type_multidim,
                ProjectionPtr    newFunction);

    void erase(std::string_view projection_name, std::string_view type_multidim);

    bool exists(std::string_view projection_name, std::string_view type_multidim) const;

    ProjectionPtr get(std::string_view projection_name, std::string_view type_multidim) const;

    // ========================================================================
    // ========================================================================

    static ProjectionRegister4MultiDim& Register();

 
    private:
    // ========================================================================
    // ========================================================================

    ProjectionRegister4MultiDim();

    ProjectionRegister4MultiDim(const ProjectionRegister4MultiDim&);

    ~ProjectionRegister4MultiDim();


    using ProjectionSet = HashTable< std::string, ProjectionPtr >;

    HashTable< std::string, ProjectionSet* > _set_;
  };

  template < typename GUM_ELEMENT >
  void registerProjection(
      std::string_view                                                   projection_name,
      std::string_view                                                   type_multidim,
      typename ProjectionRegister4MultiDim< GUM_ELEMENT >::ProjectionPtr function);
 
  // a display operator for ProjectionPtrs
 
} /* namespace gum */
 
// always include the implementations
#include <agrum/base/multidim/utils/operators/projectionRegister4MultiDim_tpl.h>
 
#endif /* GUM_PROJECTION_REGISTER_MULTI_DIM_H */