ObjectRegistry.h

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/*
 * Copyright (C) 2008-2016 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>

template<class T, class Key = std::string>
class ObjectRegistry
{
 public:
 typedef std::map<Key, T*> RegistryMapType;

 static ObjectRegistry<T, Key>* instance()
 {
 static ObjectRegistry<T, Key> instance;
 return &instance;
 }

 const T* GetRegistryItem(Key key) const
 {
 typename RegistryMapType::const_iterator iter = i_registeredObjects.find(key);
 return( iter == i_registeredObjects.end() ? NULL : iter->second );
 }

 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;
 }

 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);
 }
 }

 bool HasItem(Key key) const
 {
 return (i_registeredObjects.find(key) != i_registeredObjects.end());
 }

 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();
 }

 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