/// <summary>
/// Implementation of the Factory Method pattern for creation of a shipping cost object
/// </summary>
/// <returns></returns>
protected override IShippingCost CreateShippingCostCalculator(IOrderConfig orderConfig)
{
//switch(orderConfig.Data.ToString().ToUpper())
//{
// case "DHL":
// return new DhlShippingCost();
// case "FEDEX":
// return new FedExShippingCost();
// case "UPS":
// return new UpsShippingCost();
// case "USPS":
// return new UspsShippingCost();
// default:
// // TODO: return "unknown" shipping cost type
// return null;
//}
try
{
Assembly asm = Assembly.Load("OrderManagement.Lib");
Type shipType = asm.GetType(string.Format("{0}shippingcost", orderConfig.Data.ToString().ToLower()), true, true);
IShippingCost obj = Activator.CreateInstance(shipType) as IShippingCost;
return obj;
}
catch (Exception ex)
{
var msg = ex.Message;
}
return null;
}
public object Process(Order order, IOrderConfig orderConfig)
{
ShippingCost = CreateShippingCostCalculator(orderConfig); // Factory Method pattern
// Decorator pattern - set up the types cost components to be calculated, in the desired order.
CostComponent costComponent = new ShippingCostElement(this);
costComponent = new IncomeTaxCostElement(costComponent);
order.Cost.Total = costComponent.CalculateCostComponent(order);
return order;
}
public int CreateOrder(IOrderConfig orderConfig, Order order)
{
if (orderConfig.IsOrderBanned)
{
return(0);
}
bool stockStatus = true;
foreach (var product in order.Details)
{
if (!IsStockAvailable(product.ProductId, product.Quantity))
{
stockStatus = false;
}
}
if (!stockStatus)
{
return(0);
}
return(order.OrderId);
}
protected abstract IShippingCost CreateShippingCostCalculator(IOrderConfig orderConfig);
