Bolt\Storage\Repository::getClassMetadata PHP Method

    public function getClassMetadata()
    {
        return $this->_class;
    }

 /**
  * This block is added to deal with the possibility that a requested filter is not an allowable option on the
  * database table. If the requested field filter is not a valid field on this table then we completely skip
  * the query because no results will be expected if the field does not exist. The exception to this is if the field
  * is part of an OR query then we remove the missing field from the stack but still allow the other fields through.
  *
  * @param array      $queryParams
  * @param Repository $repo
  *
  * @return bool|array $cleanParams
  */
 public function whitelistParameters(array $queryParams, Repository $repo)
 {
     $metadata = $repo->getClassMetadata();
     $allowedParams = array_keys($metadata->getFieldMappings());
     $cleanParams = [];
     foreach ($queryParams as $fieldSelect => $valueSelect) {
         $stack = preg_split('/ *(\\|\\|\\|) */', $fieldSelect);
         $valueStack = preg_split('/ *(\\|\\|\\|) */', $valueSelect);
         if (count($stack) > 1) {
             $allowedKeys = [];
             $allowedVals = [];
             foreach ($stack as $i => $stackItem) {
                 if (in_array($stackItem, $allowedParams)) {
                     $allowedKeys[] = $stackItem;
                     $allowedVals[] = $valueStack[$i];
                 }
             }
             if (!count($allowedKeys)) {
                 return false;
             }
             $allowed = join(' ||| ', $allowedKeys);
             $cleanParams[$allowed] = join(' ||| ', $allowedVals);
         } else {
             if (!in_array($fieldSelect, $allowedParams)) {
                 return false;
             }
             $cleanParams[$fieldSelect] = $valueSelect;
         }
     }
     return $cleanParams;
 }