What's the best alternative to an out of control switch statement?

Question

I have inherited a project that has some huge switch statement blocks, with some containing up to 20 cases. What is a good way to rewrite these?

Answer 1

if it's working without major bugs (by not major I mean they don't make you pull your hair out) why bother refactor it? Don't refactor everything.

If you want, you can change it to polymorphism, but this will be a shotgun surgery, you'll probably have to refactor a whole lot more than just this switch block.