listing users with certain roles in jsp

In my web application, I have a list of users with different roles (set up in weblogic admin console). I need to display all the application users except those who have role, say, "admin". How do I do that? Methods like request.getUserPrincipal() & request.isCallerInRole() are just for the current logged-in user. Is there any other methods that I could use? Kindly help.

[383 byte] By [jetAirwaysa] at [2007-10-2 19:53:43]