public static Car GetACarFromFactory(CarEngine engine, CarWheel wheel)
{
CarGas gas = GetSomeCarGas();
Car runningCar = CarFactory.BuildARunningCar(engine, wheel, gas); // VendingMachine has the knowledge of Engine & Wheel at this point
MustDoCarTesting(runningCar);
return(runningCar);
}
public static Car BuyACar()
{
CarEngine selectedEngine = new CarEngine(); //Select an Engine you like
CarWheel selectedWheel = new CarWheel(); //Select a Wheel you like
// Only Caller has the knowledge of Engine & Wheel
Func <CarGas, Car> getARunningCarWithGas = gas => CarFactory.BuildARunningCar(selectedEngine, selectedWheel, gas);
Car car = CarVendingMachine.GetACarFromFactory(getARunningCarWithGas);
return(car);
}