private void addFilterMembers(QNameFilter filter) {
   if (filter != null) {
     final String memberSql =
         "select text_qname.id, local_name, namespace from "
             + MEMBER_TABLE_NAME
             + " inner join text_qname on text_qname.id = qname_id"
             + " where filter_id=?";
     List<Name> names = this.jt.query(memberSql, new QnameMapper(), filter.getId());
     filter.setQNames(new HashSet<Name>(names));
   }
 }