/**
  * Calculates total count of query records
  * Notes: this method do not make any modifications of the given query
  *
  * @param Query|SqlQuery $query
  *
  * @return integer
  */
 public function getCount($query)
 {
     if ($this->useWalker($query)) {
         if (!$query->contains('DISTINCT')) {
             $query->setHint(CountWalker::HINT_DISTINCT, false);
         }
         $paginator = new Paginator($query);
         $paginator->setUseOutputWalkers(false);
         $result = $paginator->count();
     } else {
         if ($query instanceof Query) {
             $parserResult = QueryUtils::parseQuery($query);
             $parameterMappings = $parserResult->getParameterMappings();
             list($params, $types) = QueryUtils::processParameterMappings($query, $parameterMappings);
             $statement = $query->getEntityManager()->getConnection()->executeQuery(sprintf('SELECT COUNT(*) FROM (%s) AS e', $query->getSQL()), $params, $types);
         } elseif ($query instanceof SqlQuery) {
             $countQuery = clone $query->getQueryBuilder();
             $statement = $countQuery->resetQueryParts()->select('COUNT(*)')->from('(' . $query->getSQL() . ')', 'e')->execute();
         } else {
             throw new \InvalidArgumentException(sprintf('Expected instance of Doctrine\\ORM\\Query' . ' or Oro\\Component\\DoctrineUtils\\ORM\\SqlQuery, "%s" given', is_object($query) ? get_class($query) : gettype($query)));
         }
         $result = $statement->fetchColumn();
     }
     return $result ? (int) $result : 0;
 }