/**
* @param Criteria $criteria
*
* @return string[]
*/
protected function getFields(Criteria $criteria)
{
$fields = [];
$whereExpr = $criteria->getWhereExpression();
if ($whereExpr) {
$visitor = new FieldVisitor();
$visitor->dispatch($whereExpr);
$fields = $visitor->getFields();
}
$orderBy = $criteria->getOrderings();
if (!empty($orderBy)) {
foreach ($orderBy as $field => $direction) {
if (!in_array($field, $fields, true)) {
$fields[] = $field;
}
}
}
return $fields;
}
