public Pizza OrderPizza(string type)
{
Pizza pizza;
// - - - - - - THIS IS WHAT VARIES.
switch (type)
{
case "cheese":
pizza = new CheesePizza();
break;
case "pepperoni":
pizza = new PepperoniPizza();
break;
// Note: This code is not close for modification.
// If the pizza offering changes, we have to modify this code.
default:
Console.WriteLine("Invalid pizza type!");
return(null);
}
// - - - - - - - - - - - - - - - - - -
// THIS IS WHAT WE EXPECT TO STAY THE SAME.
pizza.Prepare();
pizza.Bake();
pizza.Cut();
pizza.Box();
return(pizza);
}
