Don't do this: evading polymorphism
I've got two classes,Base and Sub. I can freely make changes to Base. But Sub is written by a third party and I don't have privileges to make changes to it. Here's what they look like:public class Base {
public void prepareForMission() {
loadUpInfantry();
loadUpWeapons();
}
}
public class Sub extends Base {
public void prepareForMission() {
super.prepareForMission();
loadUpOxygen();
}
}Base without changing the behaviour of Sub or other subclasses. The horrible, ugly hack I came up with for this is to evade polymorphism like so:
public class Base {
public void prepareForMission() {
loadUpInfantry();
loadUpWeapons();
if (getClass() == Base.class) {
loadUpSecretPlans();
}
}
}Doesn't it make ya cringe? I'm quite ashamed of it.
