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/*
* Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
* Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
*/
#ifndef ACORE_OBJECTREGISTRY_H
#define ACORE_OBJECTREGISTRY_H
#include "Define.h"
#include <string>
#include <vector>
#include <map>
#include <unordered_map>
/** ObjectRegistry holds all registry item of the same type
*/
template<class T, class Key = std::string>
class ObjectRegistry
{
public:
typedef std::map<Key, T*> RegistryMapType;
/// Returns a registry item
const T* GetRegistryItem(Key key) const
{
typename RegistryMapType::const_iterator iter = i_registeredObjects.find(key);
return ( iter == i_registeredObjects.end() ? nullptr : iter->second );
}
static ObjectRegistry<T, Key>* instance()
{
static ObjectRegistry<T, Key>* instance = new ObjectRegistry<T, Key>();
return instance;
}
/// Inserts a registry item
bool InsertItem(T* obj, Key key, bool override = false)
{
typename RegistryMapType::iterator iter = i_registeredObjects.find(key);
if ( iter != i_registeredObjects.end() )
{
if ( !override )
return false;
delete iter->second;
i_registeredObjects.erase(iter);
}
i_registeredObjects[key] = obj;
return true;
}
/// Removes a registry item
void RemoveItem(Key key, bool delete_object = true)
{
typename RegistryMapType::iterator iter = i_registeredObjects.find(key);
if ( iter != i_registeredObjects.end() )
{
if ( delete_object )
delete iter->second;
i_registeredObjects.erase(iter);
}
}
/// Returns true if registry contains an item
bool HasItem(Key key) const
{
return (i_registeredObjects.find(key) != i_registeredObjects.end());
}
/// Inefficiently return a vector of registered items
unsigned int GetRegisteredItems(std::vector<Key>& l) const
{
unsigned int sz = l.size();
l.resize(sz + i_registeredObjects.size());
for (typename RegistryMapType::const_iterator iter = i_registeredObjects.begin(); iter != i_registeredObjects.end(); ++iter)
l[sz++] = iter->first;
return i_registeredObjects.size();
}
/// Return the map of registered items
RegistryMapType const& GetRegisteredItems() const
{
return i_registeredObjects;
}
ObjectRegistry() { }
~ObjectRegistry()
{
for (typename RegistryMapType::iterator iter = i_registeredObjects.begin(); iter != i_registeredObjects.end(); ++iter)
delete iter->second;
i_registeredObjects.clear();
}
private:
RegistryMapType i_registeredObjects;
};
#endif
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