/// <summary>Tries to retrieve subjects from the backing RDF source for a dynamically resolved property.</summary>
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
_entity.EnsureIsInitialized();
var propertySpec = new DynamicPropertyAggregate(binder.Name);
if (!propertySpec.IsValid)
{
result = null;
return(false);
}
var property = Ontology.Properties.SingleOrDefault(p => p.Name == propertySpec.Name);
if (property == null)
{
property = new Property(propertySpec.Name).InOntology(Ontology);
}
result = GetObjects(_entity.Id, property, propertySpec);
if (propertySpec.IsList)
{
var graphOverride = new UnionGraphSelector();
var head = (IRdfListNode <object>) typeof(EntityExtensions).GetTypeInfo()
.GetMethod("AsEntity")
.MakeGenericMethod(typeof(IRdfListNode <object>))
.Invoke(null, new[] { result });
((IEntityProxy)head.UnwrapProxy()).OverrideGraphSelection(graphOverride);
var rdfListAdapter = new RdfListAdapter <IRdfListOwner, IRdfListNode <object>, object>(_entity.Context, _entity, head, graphOverride);
result = new ReadOnlyCollection <dynamic>(rdfListAdapter);
}
return(true);
}
internal object GetObjects(EntityId entityId, IProperty property, DynamicPropertyAggregate aggregate)
{
var objectValues = _tripleStore.GetObjectsForPredicate(entityId, property.Uri, null);
var objects = objectValues.Select(ConvertObject);
var aggregator = _resultTransformers.GetAggregator(aggregate.Aggregation);
return(aggregator.Aggregate(objects));
}
internal IProperty GetProperty(string binderName)
{
var spec = new DynamicPropertyAggregate(binderName);
return((from prop in Ontology.Properties
where prop.Name == spec.Name
select prop).SingleOrDefault());
}