/**
* Process the $filter option in the request and update request decription.
*
* @return void
*
* @throws ODataException Throws error in the following cases:
* (1) If $filter cannot be applied to the
* resource targetted by the request uri
* (2) If any error occured while parsing and
* translating the odata $filter expression
* to expression tree
* (3) If any error occured while generating
* php expression from expression tree
*/
private function _processFilter()
{
$filter = $this->_dataService->getHost()->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_FILTER);
if (!is_null($filter)) {
$requestTargetKind = $this->_requestDescription->getTargetKind();
if (!($requestTargetKind == RequestTargetKind::RESOURCE || $requestTargetKind == RequestTargetKind::COMPLEX_OBJECT || $this->_requestDescription->getRequestCountOption() == RequestCountOption::VALUE_ONLY)) {
ODataException::createBadRequestError(Messages::queryProcessorQueryFilterOptionNotApplicable());
}
$resourceType = $this->_requestDescription->getTargetResourceType();
try {
$expressionProvider = $this->_dataService->getMetadataQueryProviderWrapper()->getExpressionProvider();
$internalFilterInfo = ExpressionParser2::parseExpression2($filter, $resourceType, $expressionProvider);
$this->_requestDescription->setInternalFilterInfo($internalFilterInfo);
} catch (ODataException $odataException) {
throw $odataException;
}
}
}