ParameterFactory.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2009 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
 
//----------------------------------------------------------------------
// Includes
//----------------------------------------------------------------------
#include "MantidGeometry/DllConfig.h"
#include "MantidKernel/Instantiator.h"
#include "MantidKernel/Logger.h"
#include "MantidKernel/SingletonHolder.h"
 
#include <map>
#include <vector>
 
namespace Mantid {
 
namespace Kernel {
class Logger;
}
 
namespace Geometry {
 
//----------------------------------------------------------------------
// Forward declaration
//----------------------------------------------------------------------
class Parameter;
 
class MANTID_GEOMETRY_DLL ParameterFactory {
public:
  template <class C> static void subscribe(const std::string &className);
 
  static std::shared_ptr<Parameter> create(const std::string &className, const std::string &name,
                                           const std::string &visible = "true");
 
private:
  ParameterFactory();
  ParameterFactory(const ParameterFactory &);
  ParameterFactory &operator=(const ParameterFactory &);
 
  using AbstractFactory = Kernel::AbstractInstantiator<Parameter>;
  using FactoryMap = std::map<std::string, std::unique_ptr<AbstractFactory>>;
  static FactoryMap s_map;
};
 
template <class C> void ParameterFactory::subscribe(const std::string &className) {
  auto it = s_map.find(className);
  if (!className.empty() && it == s_map.cend()) {
    s_map[className] = std::make_unique<Kernel::Instantiator<C, Parameter>>();
  } else {
    throw std::runtime_error("Parameter type" + className + " is already registered.\n");
  }
}
 
} // namespace Geometry
} // namespace Mantid