I have a situation where I have a method 'x' in a class 'A'. And I have couple of main classes I mean the classes which have main method, where we call this method 'x' in class 'A'. So I have to determine at runtime in the method 'x', from which main class the call came from and then do some operations. I cannot write another method passing some arguments or keep any identifiers because everything is already defined and implemented.
I mean I am not supposed to make any changes in the existing code. Any ideas.