public IActionResult Get()
{
IEdmCollectionType collectionType;
ODataPath oDataPath = Request.ODataFeature().Path;
IEdmType edmType = oDataPath.Segments.First().EdmType;
IEdmEntityType entityType;
if (edmType is IEdmCollectionType ct)
{
collectionType = ct;
entityType = collectionType.ElementType.Definition as IEdmEntityType;
}
else
{
throw new Exception($"Unexpected EDM type '{edmType?.GetType()}'.");
}
IEnumerable <IEdmEntityObject> entityObjects = this.GetData(entityType);
IEdmCollectionTypeReference collectionTypeReference = new EdmCollectionTypeReference(collectionType);
StreamingEdmEntityObjectCollection collection = new StreamingEdmEntityObjectCollection
(collectionTypeReference
, entityObjects
);
//
// Return a collection type.
//
return(Ok(collection));
}
/// <summary>
/// Method to determine whether the current type is containing a Delta Feed
/// </summary>
/// <param name="type">IEdmType to be compared</param>
/// <returns>True or False if type is same as <see cref="EdmDeltaCollectionType"/></returns>
public static bool IsDeltaFeed(this IEdmType type)
{
if (type == null)
{
throw Error.ArgumentNull("type");
}
return(type.GetType() == typeof(EdmDeltaCollectionType));
}
/// <summary>
/// Method to determine whether the current type is a Delta resource set.
/// </summary>
/// <param name="type">IEdmType to be compared</param>
/// <returns>True or False if type is same as <see cref="EdmDeltaCollectionType"/></returns>
public static bool IsDeltaResourceSet(this IEdmType type)
{
if (type == null)
{
throw Error.ArgumentNull(nameof(type));
}
return(type.GetType() == typeof(EdmDeltaCollectionType));
}
//-----------------------------------------------------------------------------------------------------------------------------------------------------
private Type TranslateEdmTypeToClrType(IEdmModel model, IEdmType edmType)
{
var annotation = model.GetAnnotationValue<ClrTypeAnnotation>(edmType);
if ( annotation != null )
{
return annotation.ClrType;
}
var entityType = (edmType as IEdmEntityType);
if ( entityType != null )
{
return base.Context.Factory.FindDynamicType(new EdmEntityTypeKey(model, entityType));
}
var collectionType = (edmType as IEdmCollectionType);
if ( collectionType != null )
{
var elementClrType = TranslateEdmTypeToClrType(model, collectionType.ElementType.Definition);
return typeof (DataServiceCollection<>).MakeGenericType(elementClrType);
}
var primitiveType = (edmType as IEdmPrimitiveType);
if ( primitiveType != null )
{
return s_BuiltInTypesMapping[primitiveType];
}
throw new Exception("Could not determine CLR type for EDM type: " + edmType.FullTypeName() + " {" + edmType.GetType().Name + "}");
}