/**
* Create SegmentDescriptor for the first segment
*
* @param string $segmentIdentifier The identifier part of the first segment
* @param string $keyPredicate The predicate part of the first segment if any else NULL
* @param boolean $checkRights Whether to check the rights on this segment
*
* @return SegmentDescriptor Descriptor for the first segment
*
* @throws ODataException Exception if any validation fails
*/
private function _createFirstSegmentDescriptor($segmentIdentifier, $keyPredicate, $checkRights)
{
$descriptor = new SegmentDescriptor();
$descriptor->setIdentifier($segmentIdentifier);
if ($segmentIdentifier === ODataConstants::URI_METADATA_SEGMENT) {
$this->_assertion(is_null($keyPredicate));
$descriptor->setTargetKind(TargetKind::METADATA());
return $descriptor;
}
if ($segmentIdentifier === ODataConstants::URI_BATCH_SEGMENT) {
$this->_assertion(is_null($keyPredicate));
$descriptor->setTargetKind(TargetKind::BATCH());
return $descriptor;
}
if ($segmentIdentifier === ODataConstants::URI_COUNT_SEGMENT) {
throw ODataException::createBadRequestError(Messages::segmentParserSegmentNotAllowedOnRoot(ODataConstants::URI_COUNT_SEGMENT));
}
if ($segmentIdentifier === ODataConstants::URI_LINK_SEGMENT) {
throw ODataException::createBadRequestError(Messages::segmentParserSegmentNotAllowedOnRoot(ODataConstants::URI_LINK_SEGMENT));
}
$resourceSetWrapper = $this->providerWrapper->resolveResourceSet($segmentIdentifier);
if ($resourceSetWrapper === null) {
throw ODataException::createResourceNotFoundError($segmentIdentifier);
}
$descriptor->setTargetResourceSetWrapper($resourceSetWrapper);
$descriptor->setTargetResourceType($resourceSetWrapper->getResourceType());
$descriptor->setTargetSource(TargetSource::ENTITY_SET);
$descriptor->setTargetKind(TargetKind::RESOURCE());
if ($keyPredicate !== null) {
$keyDescriptor = $this->_createKeyDescriptor($segmentIdentifier . '(' . $keyPredicate . ')', $resourceSetWrapper->getResourceType(), $keyPredicate);
$descriptor->setKeyDescriptor($keyDescriptor);
if (!$keyDescriptor->isEmpty()) {
$descriptor->setSingleResult(true);
}
}
if ($checkRights) {
$resourceSetWrapper->checkResourceSetRightsForRead($descriptor->isSingleResult());
}
return $descriptor;
}
