public ParkingTransaction CalculateParkingRate(Patron patron)
{
ParkingRateCode parkingRateCode = _parkingRateDecisionTree.Evaluate(patron);
var rate = _repository.GetParkingRate(parkingRateCode);
return(new ParkingTransaction(patron, rate));
}
private IParkingRate RetriveExistingParkingRate(ParkingRateCode parkingRateCode)
{
IParkingRate parkingRate;
_parkingRatesMap.TryGetValue(parkingRateCode, out parkingRate);
return(parkingRate);
}
public IParkingRate GetParkingRate(ParkingRateCode parkingRateCode)
{
if (Enum.IsDefined(typeof(ParkingRateCode), parkingRateCode) == false)
{
throw new Exception(String.Format("Unable to create a new parking rate with code: {0}", parkingRateCode));
}
return(_parkingRatesFactory.CreateParkingRate(parkingRateCode));
}
// created the function as virtual to have an extension point without overriding the
// entire class implementation, only the location creation method.
public virtual IParkingRate CreateParkingRate(ParkingRateCode parkingRateCode)
{
IParkingRate parkingRate = RetriveExistingParkingRate(parkingRateCode);
if (parkingRate != null)
{
return(parkingRate);
}
parkingRate = GenerateParkingRateObject(parkingRateCode);
AddCreatedParkingRate(parkingRateCode, parkingRate);
return(parkingRate);
}
protected virtual IParkingRate GenerateParkingRateObject(ParkingRateCode parkingRateCode)
{
IParkingRate parkingRate = null;
switch (parkingRateCode)
{
case ParkingRateCode.EarlyBird:
{
parkingRate = CreateEarlyBirdRateObject();
break;
}
case ParkingRateCode.NightRate:
{
parkingRate = CreateNightRateObject();
break;
}
case ParkingRateCode.WeekendRate:
{
parkingRate = CreateWeekendRateObject();
break;
}
case ParkingRateCode.StandardHourRate:
case ParkingRateCode.StandardCalendarDayRate:
{
parkingRate = CreateStandardRateObject();
break;
}
default:
{
parkingRate = CreateStandardRateObject();
break;
}
}
return(parkingRate);
}
public string RetriveDisplayAttribute(ParkingRateCode code)
{
return(typeof(ParkingRateCode).GetEnumDescription((int?)code));
}
private void AddCreatedParkingRate(ParkingRateCode parkingRateCode, IParkingRate parkingRateObject)
{
_parkingRatesMap.Add(parkingRateCode, parkingRateObject); // add for next time
}
public Type ReturnCorrectParkingObjectByCode(ParkingRateCode code)
{
var rate = _repo.GetParkingRate(code);
return(rate.GetType());
}