Switch Statements

Switch Statements widersprechen dem Open-Closed Prinzip von Clean Code.

public class Bird 
{
    public BirdType Type { get; private set; }
    
    ..
    
    public double getSpeed()
    {
        switch (type)
        {
            case EUROPEAN:
                return getBaseSpeed();
            case AFRICAN:
                return getBaseSpeed() - getLoadFactor() * numberOfCoconuts;
            case NORWEGIAN_BLUE:
                return (isNailed) ? 0 : getBaseSpeed(voltage);
        }
        
        throw new BirdTypeException();
    }
}

In diesem Beispiel kann kein Vogel hinzugefügt werden, ohne den bestehenden Code zu verändern.

---

public abstract class Bird 
{
    public abstract double getSpeed();
}

public class European : Bird
{
    public override double getSpeed()
    {
        return getBaseSpeed();
    }
}

..