LogicFactory.h

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#ifndef LOGICFACTORY_H
#define LOGICFACTORY_H 1
 
// Include files
#include <cstdlib>
#include <string>
#include <map>
#include <memory>
template <class Ilogic, typename Identifier, typename LogicCreator = Ilogic* (*)()>
class LogicFactory {
public:
  bool Register(const Identifier& id, LogicCreator creator) {
    return m_associations.insert(typename std::map<Identifier, LogicCreator>::value_type(id, creator)).second;
  }
 
  bool Unregister(const Identifier& id) { return m_associations.erase(id) == 1; }
 
  std::unique_ptr<Ilogic> CreateObject(const Identifier& id) const {
    auto itr = m_associations.find(id);
 
    if (itr != m_associations.end()) {
      return std::unique_ptr<Ilogic>{(itr->second)()};
    } else
      return nullptr;  // handle error
  }
 
protected:
private:
  typename std::map<Identifier, LogicCreator> m_associations;
};
#endif  // LOGICFACTORY_H