/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */
#ifndef KEOS_RESOURCEMANAGER_H
#define KEOS_RESOURCEMANAGER_H

#include "KeosPrerequisites.h"
#include "KeosSingleton.h"

namespace Keos
{
    //-----------------------------------------------------------------------
    /** Resource manager.
     *  Using for loadable resource from a file. 
     */
    class KEOS_EXPORT CResourceManager : public CSingleton<CResourceManager>
    {
    friend CSingleton<CResourceManager>;

    public :

        /** Get a resource.
         *  @param strName Name of the resource.
         *  @return Pointer on the resource, or NULL if it was not loaded.
         */
        template <class T> T* Get(const String& strName) const;

        /** Add a resource.
         *  @param strName Name of the resource.
         *  @param pResource Resource to add.
         */
        void Add(const String& strName, IResource* pResource);

        /** Remove a resource.
         *  @param strName Name of the resource.
         */
        void Remove(const String& strName);

    private :

        /** Default constructor.
         */
        CResourceManager();

        /** Destructor.
         */
        ~CResourceManager();

        typedef std::map<String, IResource*> TResourcesMap;

        //! Map with the resource and its filename  
        TResourcesMap m_Resources; 
    };

    //=======================================================================
    // CResourceManager inline functions
    //=======================================================================
    
    //-----------------------------------------------------------------------
    template <class T>
    inline T* CResourceManager::Get(const String& strName) const
    {
        TResourcesMap::const_iterator It = m_Resources.find(strName);

        if (It != m_Resources.end())
        {
            It->second->AddRef();
            return static_cast<T*>(It->second);
        }
        else
        {
            return NULL;
        }
    }

} // namespace Keos

#endif // KEOS_RESOURCEMANAGER_H
