AbstractFactory.hpp

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#ifndef TPGLIBS_ABSTRACTFACTORY_HPP_
#define TPGLIBS_ABSTRACTFACTORY_HPP_
 
#include <cstdint>
#include <exception>
#include <functional>
#include <iostream>
#include <memory>
#include <string>
#include <unordered_map>
 
namespace tpglibs {

template<typename T>
class AbstractFactory
{
  using create_processor_func = std::function<std::shared_ptr<T>()>;
  using name_creator_map = std::unordered_map<std::string, create_processor_func>;
 
public:
  AbstractFactory() {}
  AbstractFactory(const AbstractFactory&) = delete;
  AbstractFactory& operator=(const AbstractFactory&) = delete;
  virtual ~AbstractFactory() = default;

  std::shared_ptr<T> create_processor(const std::string& processor_name);

  static void register_creator(const std::string& processor_name, create_processor_func creator);

  static std::shared_ptr<AbstractFactory<T>> get_instance();
 
protected:
  static std::shared_ptr<AbstractFactory<T>> s_single_factory;
 
private:
  static name_creator_map& get_creators();
};
 
} // namespace tpglibs
 
#include "tpglibs/AbstractFactory.hxx"
 
#endif // TPGLIBS_ABSTRACTFACTORY_HPP_