code: public synchronized void setUserRoleLink(String name,String link)
      {
          if (_roleMap==null)
              _roleMap=new HashMap();
          _roleMap.put(name,link);
      }
docs: Link a user role.
  Translate the role name used by a servlet, to the link name
  used by the container.
  @param name The role name as used by the servlet
  @param link The role name as used by the container.