/**
  * Applies this filter to a IcingaDoctrine_Query or exports it (depending
  * if the $dqlOnly is set)
  *
  * @param IcingaDoctrine_Query   The query to apply this filter to
  * @param Boolean    True to only return the dql
  *
  *
  * @author Jannis Moßhammer <*****@*****.**>
  **/
 public function __toDQL(IcingaDoctrine_Query $q, $dqlOnly)
 {
     $connection = $q->getConnection();
     $v = $this->formatValues($connection);
     $dql = $connection->quoteIdentifier($this->field) . " " . $this->operator;
     if (is_array($v)) {
         $dql .= " (" . implode(",", $v) . ")";
     } else {
         $dql .= " " . $v;
     }
     if ($dqlOnly) {
         return $dql;
     } else {
         $q->where($dql);
     }
     return;
 }