private ProjectionMetadataFlags GetFlags(ProjectionMetadata metadata)
{
IdAttribute id = metadata.Relation.Annotations?.OfType <IdAttribute>().FirstOrDefault();
OutAttribute out0 = metadata.Relation.Annotations?.OfType <OutAttribute>().FirstOrDefault();
InAttribute in0 = metadata.Relation.Annotations?.OfType <InAttribute>().FirstOrDefault();
IReferenceMetadata reference = metadata.Identity.GetMetadata <IReferenceMetadata>();
ProjectionMetadataFlags flags = ProjectionMetadataFlags.None;
if (id != null)
{
flags |= ProjectionMetadataFlags.Identity;
}
if (in0 != null || out0 != null)
{
flags |= in0 != null ? ProjectionMetadataFlags.Input : ProjectionMetadataFlags.None;
flags |= out0 != null ? ProjectionMetadataFlags.Output : ProjectionMetadataFlags.None;
}
else if (id != null)
{
flags |= ProjectionMetadataFlags.Output;
}
else if (reference != null && reference.HasAnyFlag(ReferenceMetadataFlags.Key))
{
flags |= ProjectionMetadataFlags.Input | ProjectionMetadataFlags.Output;
}
else
{
flags |= ProjectionMetadataFlags.Input;
}
return(flags);
}
