this.hs.delete("from Stem as ns where ns.stem_name != '" + Stem.ROOT_INT + "'");
this.hs.delete("from Owner");
  private void _emptyTables()     throws  HibernateException  {    this.hs.delete("from TxQueue");        this.hs.delete("from Membership");    this.hs.delete("from GrouperSession");    this.hs.delete("from Group");    List l = this.hs.find("from Stem as ns where ns.stem_name like '" + Stem.ROOT_INT + "'");    if (l.size() == 1) {      Stem    root  = (Stem) l.get(0);      String  uuid  = root.getUuid();      root.setModifier_id(  null);      root.setModify_source(null);      root.setModify_time(  0   );      this.hs.saveOrUpdate(root);      this.hs.delete("from Stem as ns where ns.stem_id != '" + uuid + "'");    }    else {      this.hs.delete("from Stem as ns where ns.stem_name != '" + Stem.ROOT_INT + "'");    }    this.hs.delete("from Factor");    this.hs.delete("from Member as m where m.subject_id != 'GrouperSystem'");    this.hs.delete(      "from GroupType as t where (t.name != 'base' and t.name != 'naming')"    );    this.hs.delete("from HibernateSubject");  } // private void _emptyTables()