/**
* Process the $expand and $select option and update the request description.
*
* @return void
*
* @throws ODataException Throws bad request error in the following cases
* (1) If $expand or select cannot be applied to the
* requested resource.
* (2) If projection is disabled by the developer
* (3) If some error occurs while parsing the options
*/
private function _processExpandAndSelect()
{
$expand = $this->_dataService->getHost()->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_EXPAND);
if (!is_null($expand)) {
$this->_checkExpandOrSelectApplicable(ODataConstants::HTTPQUERY_STRING_EXPAND);
}
$select = $this->_dataService->getHost()->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_SELECT);
if (!is_null($select)) {
if (!$this->_dataService->getServiceConfiguration()->getAcceptProjectionRequests()) {
ODataException::createBadRequestError(Messages::dataServiceConfigurationProjectionsNotAccepted());
}
$this->_checkExpandOrSelectApplicable(ODataConstants::HTTPQUERY_STRING_SELECT);
}
// We will generate RootProjectionNode in case of $link request also, but
// expand and select in this case must be null (we are ensuring this above)
// 'RootProjectionNode' is required while generating next page Link
if ($this->_expandSelectApplicable || $this->_requestDescription->isLinkUri()) {
try {
$rootProjectionNode = ExpandProjectionParser::parseExpandAndSelectClause($this->_requestDescription->getTargetResourceSetWrapper(), $this->_requestDescription->getTargetResourceType(), $this->_requestDescription->getInternalOrderByInfo(), $this->_requestDescription->getSkipCount(), $this->_requestDescription->getTopCount(), $expand, $select, $this->_dataService->getMetadataQueryProviderWrapper());
if ($rootProjectionNode->isSelectionSpecified()) {
$this->_requestDescription->raiseMinimumVersionRequirement(2, 0, $this->_dataService);
}
if ($rootProjectionNode->hasPagedExpandedResult()) {
$this->_requestDescription->raiseResponseVersion(2, 0, $this->_dataService);
}
$this->_requestDescription->setRootProjectionNode($rootProjectionNode);
} catch (ODataException $odataException) {
throw $odataException;
}
}
}