/**
  * @param string $preparedUrl
  * @return null|string
  */
 private static function buildWhere($preparedUrl)
 {
     $criteria = new Criteria();
     $andList = explode('|', $preparedUrl);
     $andList = array_filter($andList);
     foreach ($andList as $condition) {
         $criteria->andWhere(self::buildOR($condition));
     }
     return $criteria->getWhere();
 }