FactoryRegistry.h

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//
//
/*
    Copyright (C) 2001- 2009, Hammersmith Imanet Ltd
    This file is part of STIR.

    SPDX-License-Identifier: Apache-2.0

    See STIR/LICENSE.txt for details
*/

#ifndef __stir_FactoryRegistry_H__
#define __stir_FactoryRegistry_H__

#include "stir/common.h"
#include <iostream>
#include <map>
#include <functional>

START_NAMESPACE_STIR

template <typename Key, typename Factory, typename Compare = std::less<Key>>
class FactoryRegistry
{

public:
  // sadly, all of these have to be inline to prevent problems
  // with instantiation

  inline FactoryRegistry();
  inline FactoryRegistry(const Key& default_key, const Factory& default_factory);

  inline ~FactoryRegistry();

  inline void add_to_registry(const Key& key, Factory const& factory);

  inline void remove_from_registry(const Key& key);

  inline void list_keys(std::ostream& s) const;


  inline Factory const& find_factory(const Key& key) const;

private:
  typedef std::map<Key, Factory, Compare> FactoryMap;
  FactoryMap m;
  const bool has_defaults;
  const Key default_key;
  const Factory default_factory;
};

END_NAMESPACE_STIR

#include "stir/FactoryRegistry.inl"

#endif