/**
  * Method to select one object from the DB.
  *
  * @param      Criteria $criteria object used to create the SELECT statement.
  * @param      Connection $con
  * @return     AppAssignSelfServiceValue
  * @throws     PropelException Any exceptions caught during processing will be
  *       rethrown wrapped into a PropelException.
  */
 public static function doSelectOne(Criteria $criteria, $con = null)
 {
     $critcopy = clone $criteria;
     $critcopy->setLimit(1);
     $objects = AppAssignSelfServiceValuePeer::doSelect($critcopy, $con);
     if ($objects) {
         return $objects[0];
     }
     return null;
 }