How to desing an action class with GUI?

I have an Action class, where an Action can do a some things like performing a list of differen actions, performing an action where a condition is true and enabling the user to choose among several other actions.

The last situation mentioned is the problematic one.  I need some way to tell the User Interface "offer the user a choice". There are two different thing aI thought about:

1. To have the action() function to set variables in the UI and return it.

2. To Have the Action class where a getNextActions() function returns a List of possible actions. If the list is one element, it will perform only that one, otherwise it should give user number of different choices.