/// <summary>
/// Gets the capablities from the <see cref="IEdmModel"/> for the given <see cref="IEdmVocabularyAnnotatable"/>.
/// </summary>
/// <param name="model">The Edm model.</param>
/// <param name="target">The target.</param>
/// <param name="kind">Thye Capabilites kind.</param>
/// <returns>The capabilities restrictions or null.</returns>
private static ICapablitiesRestrictions GetCapabilities(this IEdmModel model, IEdmVocabularyAnnotatable target, CapabilitesTermKind kind)
{
if (model == null || target == null)
{
return(null);
}
lock (_objectLock)
{
if (!ReferenceEquals(_savedModel, model))
{
if (_capabilitesRestrictions != null)
{
_capabilitesRestrictions.Clear();
}
_savedModel = model;
}
if (_capabilitesRestrictions == null)
{
_capabilitesRestrictions = new Dictionary <IEdmVocabularyAnnotatable, IDictionary <CapabilitesTermKind, ICapablitiesRestrictions> >();
}
ICapablitiesRestrictions restriction;
if (_capabilitesRestrictions.TryGetValue(target, out IDictionary <CapabilitesTermKind, ICapablitiesRestrictions> value))
{
// Here means we visited target before and we are sure that the value is not null.
if (value.TryGetValue(kind, out restriction))
{
return(restriction);
}
else
{
restriction = CreateCapabilitesRestrictions(model, target, kind);
value[kind] = restriction;
return(restriction);
}
}
// It's first time to query this target, create new dictionary and restriction.
value = new Dictionary <CapabilitesTermKind, ICapablitiesRestrictions>();
_capabilitesRestrictions[target] = value;
restriction = CreateCapabilitesRestrictions(model, target, kind);
value[kind] = restriction;
return(restriction);
}
}
/// <summary>
/// Create the capabiliites restriction
/// </summary>
/// <param name="model">The Edm model.</param>
/// <param name="target">The Target.</param>
/// <param name="kind">The Capabiliites kind.</param>
/// <returns>The <see cref="ICapablitiesRestrictions"/>.</returns>
public static ICapablitiesRestrictions CreateCapabilitesRestrictions(this IEdmModel model, IEdmVocabularyAnnotatable target, CapabilitesTermKind kind)
{
Debug.Assert(model != null);
Debug.Assert(target != null);
ICapablitiesRestrictions capabilitiesRestrictions = null;
switch (kind)
{
case CapabilitesTermKind.DeleteRestrictions: // DeleteRestrictions
capabilitiesRestrictions = new DeleteRestrictions();
break;
case CapabilitesTermKind.UpdateRestrictions: // UpdateRestrictions
capabilitiesRestrictions = new UpdateRestrictions();
break;
case CapabilitesTermKind.InsertRestrictions: // InsertRestrictions
capabilitiesRestrictions = new InsertRestrictions();
break;
case CapabilitesTermKind.SearchRestrictions: // SearchRestrictions
capabilitiesRestrictions = new SearchRestrictions();
break;
case CapabilitesTermKind.ExpandRestrictions: // ExpandRestrictions
capabilitiesRestrictions = new ExpandRestrictions();
break;
case CapabilitesTermKind.SortRestrictions: // SortRestrictions
capabilitiesRestrictions = new SortRestrictions();
break;
case CapabilitesTermKind.FilterRestrictions: // FilterRestrictions
capabilitiesRestrictions = new FilterRestrictions();
break;
case CapabilitesTermKind.NavigationRestrictions: // NavigationRestrictions
capabilitiesRestrictions = new NavigationRestrictions();
break;
case CapabilitesTermKind.CountRestrictions: // CountRestrictions
capabilitiesRestrictions = new CountRestrictions();
break;
case CapabilitesTermKind.BatchSupported: // BatchSupported
capabilitiesRestrictions = new BatchSupported();
break;
case CapabilitesTermKind.SkipSupported: // SkipSupported
capabilitiesRestrictions = new SkipSupported();
break;
case CapabilitesTermKind.TopSupported: // TopSupported
capabilitiesRestrictions = new TopSupported();
break;
case CapabilitesTermKind.KeyAsSegmentSupported: // KeyAsSegmentSupported
capabilitiesRestrictions = new KeyAsSegmentSupported();
break;
case CapabilitesTermKind.IndexableByKey: // IndexableByKey
capabilitiesRestrictions = new IndexableByKey();
break;
case CapabilitesTermKind.ChangeTracking: // ChangeTracking
case CapabilitesTermKind.CrossJoinSupported: // CrossJoinSupported
case CapabilitesTermKind.CallbackSupported: // CallbackSupported
case CapabilitesTermKind.FilterFunctions: // FilterFunctions
case CapabilitesTermKind.BatchContinueOnErrorSupported: // BatchContinueOnErrorSupported
case CapabilitesTermKind.AsynchronousRequestsSupported: // AsynchronousRequestsSupported
case CapabilitesTermKind.Isolation: // Isolation
case CapabilitesTermKind.AcceptableEncodings: // AcceptableEncodings
case CapabilitesTermKind.SupportedFormats: // SupportedFormats
default:
throw Error.NotSupported(String.Format(SRResource.CapabilitiesKindNotSupported, kind));
}
// load the annotation value
if (!capabilitiesRestrictions.Load(model, target))
{
return(null);
}
return(capabilitiesRestrictions);
}
