newbee. Best way for role-based authentication

[Michael]

Hi,

Application: JDeveloper 10G
Level : Newbee

I am searching for a sensible way to create role-based authentication
for my website. For example, if x signs in then he sees a subset of
buttons or a subset of data, and if y signs in then she sees another
subset.

My idea is to create indepedent DataPages in the Struts Page Flow
Diagram. And then depending on which user is logged in, the Diagram
will forward to the relevant DataPages.

I will have max 5 roles but it sure complicates things having 5
"Customer Search" DataPages.

Could anyone guide me ??
Examples are also welcomed.

TIA
<Michal>