RequestMapping with multiple values with pathvariable - Spring 3.0

@RequestMapping(value = {"/userDetails", "/userDetails/edit/{id}"}, method = RequestMethod.GET)
public String userDetails(Map Model,****) {
//what goes here? 
}

What will be my arguments to the userDetails method? And how do I differentiate /userDetails and /userDetails/edit/9 within the method?