Choosing ActionForm at run time?

[andrew low]

I want to use an action to accept the details for a CandidateBean - this bean wants to be abstract, and I want to have some sort of control that allows me to receive a bean of a child type of the candidate bean instead.

What are my first couple of steps - I'm confused as to how I might do this - should I point the form off to different actions depending on the bean type to be supplied (thus triplicating the effort) or is there an nice way to do this.

Sorry if this is a vaguely phrased problem.

Cheers

Andrew