[munksbeer]

Yeah sorry, I don't mean to cause offense but that doesn't make sense. If you've got abstract methods that require implementation in concrete classes, you've got polymorphism, and at some point you're going to be choosing which concrete class to instantiate.

If you always know which concrete class to instantiate and use at each point in the code, it doesn't sound like you need polymorphism in the first place.

Or I could just be missing something.

[recursivecaveat]

Usually when I have polymorphism I have some algorithm that operates on an array or graph of mixed instances of BaseClass. For any particular graph I know statically which concrete nodes I want and their arrangement. Factory really only made sense to me if you want to delay the actual creation of the array members, if the decision comes from something external, or if their creation is deeply entangled with their environment in a way you couldn't otherwise avoid repeating.

[munksbeer]

Fair, that makes sense.