public static DAOFactory getDAOFactory(Persistance bdd) {
            DAOFactory daoF = null;

            switch (bdd) {
            case MYSQL:
                    daoF = new MySQLDAOFactory();
                    break;
            case ORACLE:
                    daoF = null;
                    break;
            case XML:
                    daoF = null;
                    break;
            }

            return daoF;
	}