im researching the custom datasource code thats distributed with the server. if i use the hibernate example, how exactly could i pass the name of the role that the user is a member of to the HibernateDataSourceService class? it looks like if i accomplish that then i can simply define all my databases in the application context file of my datasource and have the roles in jasperserver match. if i can somehow pass the data source the role name, i should have it right?