How do I put Role Membership rules into a report?

OIM 12c with Bi Publisher.

I'm trying to create a report where it outputs the "User membership Rule" for my user defined roles.

However, as the rule is encrypted in the Database, the only way to do this is with a REST API call. But I can't seem to find a way to do that in Bi Publisher. Not without making a customized function in SQL and enabling network linking.

Does anyone else have any ideas?