ObjectFactory.h

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/*
 * Copyright (C) 2022 The V-Gears Team
 *
 * This file is part of V-Gears
 *
 * V-Gears is free software: you can redistribute it and/or modify it under
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, version 3.0 (GPLv3) of the License.
 *
 * V-Gears 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.
 */
 
#pragma once
 
#include <map>
#include <string>
#include "common/scummsys.h"
 
template<typename BaseType, typename Type> BaseType *CreateObject(){return new Type();}
 
template<typename KeyType, typename BaseType> class ObjectFactory{
 
    public:
        template<typename Type> void AddEntry(const KeyType &key) {
            registry_[key] = &CreateObject<BaseType, Type>;
        }
 
        BaseType *Create(const KeyType &key) const{
            typename RegistryMap::const_iterator entry = registry_.find(key);
            if (entry == registry_.end()) return NULL;
            return (entry->second)();
        }
 
    private:
 
        typedef BaseType *(*CreateFunc)();
 
        typedef std::map<KeyType, CreateFunc> RegistryMap;
 
        RegistryMap registry_;
};