[keycloak-dev] extend keycloak principal

I'm working on SSO using jboss keycloak. I m developing a user federation provider working with my custom user database and ldap authentication. i m able to do the authentication process but now i need to retrieve to my webapplications a Principal extending the keycloak one. I mean that my rest service could have to access a principal object holding other information besides those covered by keycloakPrincipal (i.e. company group, company and others). i was planning to write my own MyProjectPrincipal extending keycloakPrincipal but then...  is it the right way? how can i retrieve this principal to my custom webapplication? (i.e. REST service)? Best regards and thanks a lot for your attention. AlessioInviato da Yahoo Mail su Android