How to deal with monstrous Struts Actions?

Original Hierarchy:      New Hierarchy:

     Action                   Action
       |                        |
       |                      BaseA
  (old)ClassA                   |
                       +--------+----------+
                       |        |          |
                   ClassB (new)ClassA   ClassC

enum Operation {
  ADD, DELETE;
}

...

Operation operation = determineOperation(form);
if (operation == Operation.DELETE) {
  doDelete(form);
} else if (operation == Operation.ADD) {
  doAdd(form);
}