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/*
* Copyright (C) 2008-2017 TrinityCore <http://www.trinitycore.org/>
* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TRINITY_OBJECTREGISTRY_H
#define TRINITY_OBJECTREGISTRY_H
#include "Define.h"
#include <string>
#include <map>
#include <vector>
#include <memory>
/** ObjectRegistry holds all registry item of the same type
*/
template<class T, class Key = std::string>
class ObjectRegistry final
{
public:
typedef std::map<Key, std::unique_ptr<T>> RegistryMapType;
static ObjectRegistry<T, Key>* instance()
{
static ObjectRegistry<T, Key> instance;
return &instance;
}
/// Returns a registry item
T const* GetRegistryItem(Key const& key) const
{
auto itr = _registeredObjects.find(key);
if (itr == _registeredObjects.end())
return nullptr;
return itr->second.get();
}
/// Inserts a registry item
bool InsertItem(T* obj, Key const& key, bool force = false)
{
auto itr = _registeredObjects.find(key);
if (itr != _registeredObjects.end())
{
if (!force)
return false;
_registeredObjects.erase(itr);
}
_registeredObjects.emplace(std::piecewise_construct, std::forward_as_tuple(key), std::forward_as_tuple(obj));
return true;
}
/// Returns true if registry contains an item
bool HasItem(Key const& key) const
{
return (_registeredObjects.count(key) > 0);
}
/// Return the map of registered items
RegistryMapType const& GetRegisteredItems() const
{
return _registeredObjects;
}
private:
RegistryMapType _registeredObjects;
// non instanceable, only static
ObjectRegistry() { }
~ObjectRegistry() { }
};
#endif
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