public Group getGroup(User user) {

        Authorization auth = m_useradmin.getAuthorization(user);

        String[] roles = auth.getRoles();

        if (roles != null) {

            for (String role : roles) {

                Role result = m_useradmin.getRole(role);

                if (result.getType() == Role.GROUP) {

                    Group group = (Group) result;

                    Role[] members = group.getMembers();

                    if (members != null) {

                        for (Role r : members) {

                            if (r.getType() == Role.USER && r.getName().equals(user.getName())) {

                                return group;

                            }

                        }

                    }

                }

            }

        }

        return null;

    }