/// <summary>
/// Sets a product in this order line
/// </summary>
/// <param name="product">The related product for this order line</param>
public void SetProduct(Product product)
{
if (product == null
||
product.IsTransient())
{
throw new ArgumentNullException(Messages.exception_CannotAssociateTransientOrNullProduct);
}
//fix identifiers
this.ProductId = product.Id;
this.Product = product;
}
/// <summary>
/// Create a new order line
/// </summary>
/// <param name="product">The associated product</param>
/// <param name="amount">the number of items</param>
/// <param name="discount">the selected discount for this line</param>
/// <returns>The new order line</returns>
public OrderLine CreateOrderLine(Product product, int amount, decimal unitPrice, decimal discount)
{
//check precondition
if (amount <= 0
||
product.IsTransient())
{
throw new ArgumentException(Messages.exception_InvalidDataForOrderLine);
}
//check discount values
if (discount < 0)
discount = 0;
if (discount > 100)
discount = 100;
//create and return order line
var line = new OrderLine()
{
OrderId = this.Id,
Amount = amount,
Discount = discount,
UnitPrice = unitPrice
};
line.SetProduct(product);
return line;
}