/**
  * Retrieve object using using composite pkey values.
  * @param      int $cal_id
  * @param      int $cal_date
  * @param      PropelPDO $con
  * @return     CalendarEventRepeatNot
  */
 public static function retrieveByPK($cal_id, $cal_date, PropelPDO $con = null)
 {
     $_instancePoolKey = serialize(array((string) $cal_id, (string) $cal_date));
     if (null !== ($obj = CalendarEventRepeatNotPeer::getInstanceFromPool($_instancePoolKey))) {
         return $obj;
     }
     if ($con === null) {
         $con = Propel::getConnection(CalendarEventRepeatNotPeer::DATABASE_NAME, Propel::CONNECTION_READ);
     }
     $criteria = new Criteria(CalendarEventRepeatNotPeer::DATABASE_NAME);
     $criteria->add(CalendarEventRepeatNotPeer::CAL_ID, $cal_id);
     $criteria->add(CalendarEventRepeatNotPeer::CAL_DATE, $cal_date);
     $v = CalendarEventRepeatNotPeer::doSelect($criteria, $con);
     return !empty($v) ? $v[0] : null;
 }