code: public Object doSetHandle(Object bookmark, int iOpenMode, String strFields, int iHandleType) throws DBException, RemoteException
      {
          return this.seek(null, 0, null, strFields, bookmark);
      }
docs: Reposition to this record using this bookmark.
  <p />In the thin implementation, you can only read using the primary key as the bookmark.
  JiniTables can't access the datasource on the server, so they must use the bookmark.