Backend bean question

[support]

Is there a way, in the backend bean constructor to find out which 
commandlink was pressed by the user to make the call?

I am having difficulty with using the same page for both Insert and 
Update on information contained in the database.  The command link does 
not hit the action listener if the wrong mode is set, but not sure how 
to detect what mode I am in before all the setters get executed (spring 
injected).

Thanks

Roger