static void Main(string[] args)
{
FieldPlayer fieldPlayer = new FieldPlayer();
Forward forward = new Forward();
MidFielder midfielder = new MidFielder();
// Link decorators
forward.AssignPlayer(fieldPlayer);
midfielder.AssignPlayer(forward);
midfielder.passBall();
}
static void Decorator()
{
//'-- Step 1:
//'Create few players (concrete components)
//'Create few field Players
var owen = new FieldPlayer("Owen");
var beck = new FieldPlayer("Beckham");
//'Create a goal keeper
var khan = new GoalKeeper("Khan");
//'-- Step 2:
//'Just make them pass the ball
//'(during a warm up session ;))
System.Console.WriteLine();
System.Console.WriteLine(" > Warm up Session... ");
owen.PassBall();
beck.PassBall();
khan.PassBall();
//'-- Step 3: Create and assign the responsibilities
//'(when the match starts)
System.Console.WriteLine();
System.Console.WriteLine(" > Match is starting.. ");
//'Set owen as our first forward
var forward1 = new Forward();
forward1.AssignPlayer(owen);
//'Set Beckham as our midfielder
var midfielder1 = new MidFielder();
midfielder1.AssignPlayer(beck);
//'Now, use these players to do actions
//'specific to their roles
//'Owen can pass the ball
forward1.PassBall();
//'And owen can shoot as well
forward1.ShootGoal();
//'Beckham can pass ball
midfielder1.PassBall();
//'Beckham can dribble too
midfielder1.Dribble();
//' [ Arrange the above operations to some meaningfull sequence, like
//' "Beckham dribbled and passed the ball to owen and owen shooted the
//' goal ;) - just for some fun ]"
//'-- Step 4: Now, changing responsibilities
//'(during a substitution)
//'Assume that owen got injured, and we need a new player
//'to play as our forward1
System.Console.WriteLine();
System.Console.WriteLine(" > OOps, Owen " + "got injured. " + "Jerrard replaced Owen.. ");
//'Create a new player
var jerrard = new FieldPlayer("Jerrard");
//'Ask Jerrard to play in position of owen
forward1.AssignPlayer(jerrard);
forward1.ShootGoal();
//'-- Step 5: Adding multiple responsibilities
//'(When a player need to handle multiple roles)
//'We already have Beckham as our midfielder.
//'Let us ask him to play as an additional forward
var onemoreForward = new Forward();
onemoreForward.AssignPlayer(beck);
System.Console.WriteLine();
System.Console.WriteLine(" > Beckham has " + "multiple responsibilities.. ");
//'Now Beckham can shoot
onemoreForward.ShootGoal();
//'And use his earlier responsibility to dribble too
midfielder1.Dribble();
//'According to our design, you can attach the responsibility of
//'a forward to a goal keeper too, but when you actually
//'play football, remember that it is dangerous ;)
//'Wait for key press
}