/// <summary>
/// Checks that the previous segment can be composed upon.
/// </summary>
/// <param name="previous">previous segment info.</param>
private static void CheckSegmentIsComposable(SegmentInfo previous)
{
if (!IsSegmentComposable(previous))
{
// Enumerable and DirectValue results cannot be composed at all, and we don't allow we can't access properties in a single queryable complex either
throw DataServiceException.ResourceNotFoundError(
Strings.RequestUriProcessor_IEnumerableServiceOperationsCannotBeFurtherComposed(previous.Identifier));
}
}
/// <summary>
/// Throws if the given segment must be a leaf, as a later segment is being created.
/// </summary>
/// <param name="previous">The previous segment which may need to be a leaf.</param>
private static void ThrowIfMustBeLeafSegment(SegmentInfo previous)
{
if (previous.IsServiceActionSegment)
{
throw DataServiceException.CreateBadRequestError(Strings.RequestUriProcessor_MustBeLeafSegment(previous.Identifier));
}
if (previous.TargetKind == RequestTargetKind.Batch || previous.TargetKind == RequestTargetKind.Metadata || previous.TargetKind == RequestTargetKind.PrimitiveValue || previous.TargetKind == RequestTargetKind.VoidOperation || previous.TargetKind == RequestTargetKind.OpenPropertyValue || previous.TargetKind == RequestTargetKind.MediaResource || previous.TargetKind == RequestTargetKind.Collection)
{
// Nothing can come after a $metadata, $value or $batch segment.
// Nothing can come after a service operation with void return type.
// Nothing can come after a collection property.
throw DataServiceException.ResourceNotFoundError(Strings.RequestUriProcessor_MustBeLeafSegment(previous.Identifier));
}
}
