How to get the calling referring object from inside the method of a class

Hi all,

i am using one local class inside my program for handling different events called from two ALVs(one at TOP and another at BOTTOM) in my screen.

now I want to know which reference object is calling the class from inside my method so that i can handle the behavior of ALVs in a different way depending on which ALV(TOP or BOTTOM), i am working on.