////////////////////////////////////////////////////////////////////////
/// \class RAT::PMTSelectors::PMTSelectorFactory
///
/// \brief  Factory for Just In Time creation of selectors
///
/// \author Phil G Jones <p.jones22@physics.ox.ac.uk>
/// \author Matt Mottram < m.mottram@qmul.ac.uk> -- contact person
///
/// REVISION HISTORY:\n
///     05/06/2011 : P G Jones - New file \n
///     2014-07-17 : P G Jones - Add register method.\n
///
/// \details Allows selectors to be newed by string name, when required.
///         This is a singleton class.
///
////////////////////////////////////////////////////////////////////////

#ifndef __RAT_PMTSelector_PMTSelectorFactory__
#define __RAT_PMTSelector_PMTSelectorFactory__

#include <RAT/Factory.hh>
#include <RAT/PMTSelector.hh>

#include <string>

namespace RAT
{

namespace DS
{
  class EV;
  class Run;
}

namespace PMTSelectors
{

class PMTSelectorFactory
{
public:
  /// Returns the only instance of the class
  inline static PMTSelectorFactory* Get();

  /// Register a selector in the factory
  ///
  /// An example call is Register( MyPMTSelector::GetName(), new Alloc<PMTSelector, MyPMTSelector>())
  ///
  /// @param[in] name of the selector
  /// @param[in] allocator instance of an Alloc with the correct selector type
  void Register( std::string name, AllocBase<PMTSelector>* allocator );

  /// Returns the method by name
  PMTSelector* GetPMTSelector( const std::string name ); ///< PMTSelector name or name-init, init will be passed to the method
private:
  /// Private constructor to prevent instantiation
  PMTSelectorFactory();

  Factory<PMTSelector> fFactory; ///< PMTSelector factory, contains allocators for PMTSelectors
};

inline PMTSelectorFactory*
PMTSelectorFactory::Get()
{
  static PMTSelectorFactory selectorFactory;
  return &selectorFactory;
}

} //::PMTSelector

} //::RAT

#endif