public static void Start()
{
Console.WriteLine("\nMultipleDispatchWithSwitchCase\n");
SpaceShip ship = new SpaceShip() { Name = "enterprise" } ;
IObjectInSpace a = new Planet() { Gravity = 1 };
IObjectInSpace b = new Planet() { Gravity = 5 };
IObjectInSpace c = new Asteroid() { Metal = 3 };
IObjectInSpace d = new Asteroid() { Metal = 2 };
Console.WriteLine(ship.DescribeInteraction(a));
Console.WriteLine(ship.DescribeInteraction(b));
Console.WriteLine(ship.DescribeInteraction(c));
Console.WriteLine(ship.DescribeInteraction(d));
// Downside: Whenever a new IObjectInSpace gets introduced a new case statement must be added to the SpaceShip
// class. This violates the open/close principle and it gets worse if we have differnt types of SpaceShips
}
public string DescribeInteraction(Asteroid other)
{
return "the " + Name + " mines " + other.Metal + " tons of metal from an asteroid";
}