How to justify why an unchecked cast is okay, regarding Copyable getObjectCopy()

Question

(This is a follow-up to my previous question.)

I have an interface called Copyable, which has a single function

Copyable getObjectCopy();
         


        

Answer 1

We are in Java 5+ world now! User Generics.

You can change the signature of Copyable to something like:

interface Copyable {
    T getObjectCopy();
}

Now your ValidateValue value would be something like:

puvlic class ValidateValue implements Copyable> {
    ...
}

and everyone (including the compiler) would be happy!