C:/Users/Marc/Desktop/Phystank/trunk/src/util/FactoryTemplate.h

//This file is part of PhysTank.
//
//PhysTank 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 3 of the License, or
//(at your option) any later version.
//
//PhysTank 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 PhysTank.  If not, see <http://www.gnu.org/licenses/>.
//
// © Marc Johnson, 2009

#ifndef _FACTORYTEMPLATE_
#define _FACTORYTEMPLATE_

#include <map>

template<class IdType, class BaseClass, class IdHasher>
class FactoryTemplate
{
public:
        typedef BaseClass* (*CreateFunc)(); 
private:
        std::map<IdType, CreateFunc, IdHasher> m_creators;
public:
        FactoryTemplate()
        {
        }

        void RegisterType(const IdType& id, CreateFunc& creator)
        {
                if(!IsTypeRegistered(id))
                        m_creators[id] = creator;
        }

        void UnregisterType(const IdType& id)
        {
                if(IsTypeRegistered(id))
                        m_creators.erase(id);
        }
        
        template<class Class>
        Class* CreateObject(const IdType& id)
        {
                if(IsTypeRegistered(id))
                {
                        CreateFunc& creator = m_creators[id];
                        return (Class*)creator();
                }

                return 0;
        }

        bool IsTypeRegistered(const IdType& id)
        {
                return m_creators.find(id) != m_creators.end();
        }
};

#endif

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