Java Development Tools

ADF Security uses SecurityContext to retrieve username and display page using roles of a particular user...... and we add users and application roles in jazn-data.xml

Actually my website created in adf doesn't have any login page..... It will receive user information from another website....
Now i want to display pages and their content based on user and their role....

Can u please tell me how to set Username in securityContext such that my website will work on the username retrieved from another website via token....

Please answer this question.....