/// <summary>
/// Constructor.
/// </summary>
/// <param name="attribute"><seealso cref="ECABaseModel.Attribute"/> that is to be represented by the RDF endpoint</param>
/// <param name="uri">Endpoint listener URI</param>
public AttributeDatapoint(ECABaseModel.Attribute attribute, string uri) : base(uri)
{
this.attribute = attribute;
// In case we store an Entity as attribute, the resulting Resource should rather point to the datapoint that is created for it.
bool isEntity = attribute.Type.Equals(typeof(ECABaseModel.Entity));
bool isEntityCollection = attribute.Type.Equals(typeof(ECABaseModel.EntityCollection));
// In case that the attribute contains another entity, we have to check whether there is already a Datapoint set up for it. If not,
// we take care of this here. This follows the idea of automatic recursive Datapoint generation.
if (isEntity && !((ECABaseModel.Entity)attribute.Value).HasDatapoint())
{
ECABaseModel.Entity child = (ECABaseModel.Entity)attribute.Value;
var childEntityDP = new EntityDatapoint(child, this.Route.TrimEnd('/') + "/" + child.Guid + "/");
var childGraph = childEntityDP.graph.RDFGraph;
childGraph.Assert(new VDS.RDF.Triple(
childGraph.CreateUriNode(new Uri(this.Route.TrimEnd('/') + "/" + child.Guid + "/")),
childGraph.CreateUriNode("dct:isPartOf"),
childGraph.CreateUriNode(new Uri(attribute.ParentComponent.ContainingEntity.GetDatapoint().Route))
));
}
if (isEntityCollection && !((ECABaseModel.EntityCollection)attribute.Value).HasDatapoint())
{
var child = (ECABaseModel.EntityCollection)attribute.Value;
var childExDP = new EntityCollectionDatapoint(child, this.Route.TrimEnd('/') + "/" + child.Guid + "/");
}
// The RDF Graph vor the Attribute Node needs to point to this entity resource accordingly, instead of assuming a separate
// attribute datapoint
if (!(isEntity || isEntityCollection))
{
graph = new AttributeLDPGraph(new Uri(uri), attribute);
}
else if (isEntity)
{
graph = new AttributeLDPGraph(new Uri(uri), attribute, ((ECABaseModel.Entity)attribute.Value).GetDatapoint().Route);
}
else
{
graph = new AttributeLDPGraph(new Uri(uri), attribute, ((ECABaseModel.EntityCollection)attribute.Value).GetDatapoint().Route);
}
// if we have any other type of attribute, we go on to generate a datapoint for the attribute value based on the type of the attribute by
// reflection
if (!isEntity && !isEntityCollection)
{
Type valueResourceType = typeof(ValueResource <>).MakeGenericType(attribute.Type);
Uri datapointUri = new Uri(uri);
Uri wsUri = new Uri("ws://" + datapointUri.Host + ":" + (datapointUri.Port + 1) + datapointUri.PathAndQuery + "/ws/");
WebsocketSubscription ws = new WebsocketSubscription(wsUri.ToString());
ConstructorInfo constructor = valueResourceType.GetConstructor(new Type[] { attribute.Type, typeof(string) });
valueResource = constructor.Invoke(new object[] { attribute.Value, (uri + "/value/") });
EventInfo eventInfo = valueResourceType.GetEvent("ValueChanged");
eventInfo.AddEventHandler(valueResource, new EventHandler <EventArgs>(HandleValueChanged));
MethodInfo subscribe = valueResourceType.GetMethod("Subscribe");
subscribe.Invoke(valueResource, new object[] { ws });
}
attribute.SetDatapoint(this);
}
public static void SetDatapoint(this EntityCollection entityCollection, EntityCollectionDatapoint datapoint)
{
datapoints.Add(entityCollection.Guid, datapoint);
}