CODEWITHSUNDEEP
c#propertiesoverriding
Kiwi
Kiwi

Reputation: 2773

Overriding property setter

I'm making a program where there are some balls bouncing around, but now I want to inherit that class and make that new one impossible to set it's velocity

i've tried this but that doesn't do anyting

public class Ball {
    public Ball(double posX, double posY, double rad, Vector vel) {
        Pos = new Point(posX, posY);
        Rad = rad;
        Vel = vel;
    }
    public double Rad { get; set; }

    public Point Pos { get; set; }
    public Vector Vel { get; set; }
}

public class StaticBall : Ball {
    public StaticBall(double posX, double posY, double rad) 
        : base(posX, posY, rad, new Vector(0, 0)) { 
    }
    public Vector Vel {
        get { return Vel; }
        set { Vel = Vel; }
    }
}

how should I do this?

Upvotes: 2

Views: 1371

Answers (1)

Heinzi
Heinzi

Reputation: 172200

I'm making a program where there are some balls bouncing around, but now I want to inherit that class and make that new one impossible to set it's velocity

Your requirement violates the Substitution Principle. If the velocity of a Ball can be changed, the velocity of any class inheriting from Ball must also be changeable.

Solution: Instead of inheriting ConstantSpeedBall from Ball, create a new base class BallBase and inherit both ConstantSpeedBall and ChangingVelocityBall from it.

Upvotes: 2

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