private void VisitStatements(ContentfulClass instance, INode subject)
{
var statements = instance
.GetType()
.GetProperties()
.Where(p => Attribute.IsDefined(p, typeof(PredicateAttribute)))
.Select(p => new
{
Predicate = this.Graph.CreateUriNode(new Uri(p.GetCustomAttribute <PredicateAttribute>().Uri)),
Object = p.GetValue(instance)
})
.Where(field => field.Object != null);
foreach (var statement in statements)
{
if (statement.Object is ContentfulClass contentful)
{
this.VisitObject(subject, statement.Predicate, contentful);
}
else if (statement.Object is IEnumerable <ContentfulClass> collection)
{
this.VisitObject(subject, statement.Predicate, collection);
}
else
{
this.VisitObject(subject, statement.Predicate, statement.Object.ToString());
}
}
}
private INode GetId(ContentfulClass instance)
{
var baseUriAttribute = instance.GetType().GetCustomAttribute <BaseUriAttribute>();
if (baseUriAttribute == null)
{
throw new Exception($"BaseUriAttribute missing on {instance.GetType()}");
}
var id = instance.Sys.Id;
if (instance is IUriEntry uriEntry)
{
id = uriEntry.Uri;
}
return(this.Graph.CreateUriNode(new Uri(new Uri(baseUriAttribute.Uri), id)));
}
private void VisitType(ContentfulClass instance, INode subject)
{
var classAttribute = instance.GetType().GetCustomAttribute <ClassAttribute>();
if (classAttribute != null)
{
this.Graph.Assert(
subject,
this.Graph.CreateUriNode(new Uri(RdfSpecsHelper.RdfType)),
this.Graph.CreateUriNode(new Uri(classAttribute.Uri))
);
}
}