/**
* 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 = $this->service->getHost()->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_EXPAND);
if (!is_null($expand)) {
$this->_checkExpandOrSelectApplicable(ODataConstants::HTTPQUERY_STRING_EXPAND);
}
$select = $this->service->getHost()->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_SELECT);
if (!is_null($select)) {
if (!$this->service->getConfiguration()->getAcceptProjectionRequests()) {
throw ODataException::createBadRequestError(Messages::configurationProjectionsNotAccepted());
}
$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->request->isLinkUri()) {
$rootProjectionNode = ExpandProjectionParser::parseExpandAndSelectClause($this->request->getTargetResourceSetWrapper(), $this->request->getTargetResourceType(), $this->request->getInternalOrderByInfo(), $this->request->getSkipCount(), $this->request->getTopCount(), $expand, $select, $this->service->getProvidersWrapper());
if ($rootProjectionNode->isSelectionSpecified()) {
$this->request->raiseMinVersionRequirement(2, 0);
}
if ($rootProjectionNode->hasPagedExpandedResult()) {
$this->request->raiseResponseVersion(2, 0);
}
$this->request->setRootProjectionNode($rootProjectionNode);
}
}
