/// <summary>
/// Creates an object of a Data Access Implementor
/// </summary>
/// <param name="type"></param>
/// <exception cref="InvalidBookingTypeDAOException</exception>
/// <returns>Returns an interface for one the booking types supplied</returns>
public IBookingDAOImpl Create(BookingTypes type)
{
IBookingDAOImpl bookings = null;
bookings = s_bookingDAOs[type];
return(bookings);
}
/// <summary>
/// Creates an object of a Data Access Implementor
/// </summary>
/// <param name="type"></param>
/// <exception cref="InvalidBookingTypeDAOException</exception>
/// <returns>Returns an interface for one the booking types supplied</returns>
public IBookingDAOImpl Create(BookingTypes type)
{
IBookingDAOImpl bookings = null;
if (type == BookingTypes.Flight)
{
bookings = new AirTravelBookingDAOImpl();
}
return(bookings);
}
/// <summary>
/// Gets the instance of Booking Data Access Object as this a singleton
/// </summary>
/// <exception cref="InvalidBookingTypeDAOException">Throws an exception if an invalid booking type</exception>
/// <returns>Instance of the Booking Data Access Object</returns>
public static BookingDAO GetInstance(BookingTypes type)
{
try
{
daoImpl = BookingDAOImplFactory.GetInstance().Create(type);
}
catch (InvalidBookingTypeDAOException)
{
throw;
}
return(instance);
}
static BookingDAOImplFactory()
{
AppSettingsReader asr = new AppSettingsReader();
string bookingConfig = asr.GetValue("bookingDAOTypes", typeof(string)).ToString();
string[] tokens = bookingConfig.Split(':');
for (int i = 0; i < tokens.Length;)
{
BookingTypes bt = (BookingTypes)Convert.ToInt32(tokens[i]);
string className = tokens[i + 1];
Assembly asm = Assembly.GetExecutingAssembly();
object objBookingDAO = asm.CreateInstance(className);
IBookingDAOImpl bookingDAOImpl = (IBookingDAOImpl)objBookingDAO;
s_bookingDAOs.Add(bt, bookingDAOImpl);
i += 2;
}
}
