public void concUpdateSameObject(ExtObjectContainer oc, int seq) throws Exception {
   Query query = oc.query();
   query.descend("_s").constrain(testString + COUNT / 2);
   ObjectSet result = query.execute();
   Assert.areEqual(1, result.size());
   SimpleObject o = (SimpleObject) result.next();
   o.setI(COUNT + seq);
   oc.store(o);
 }
 public void concUpdateDifferentObject(ExtObjectContainer oc, int seq) throws Exception {
   Query query = oc.query();
   query
       .descend("_s")
       .constrain(testString + seq)
       .and(query.descend("_i").constrain(new Integer(seq)));
   ObjectSet result = query.execute();
   Assert.areEqual(1, result.size());
   SimpleObject o = (SimpleObject) result.next();
   o.setI(seq + COUNT);
   oc.store(o);
 }