/// <summary>
/// Find the related instance.
/// </summary>
/// <param name="deltaItem"></param>
/// <param name="originalSet"></param>
/// <returns></returns>
protected virtual T GetOriginal(IDeltaItem deltaItem, IEnumerable <T> originalSet)
{
return(null);
}
/// <inheritdoc />
public sealed override object ReadInline(object item, IEdmTypeReference edmType, ODataDeserializerContext readContext)
{
if (item == null)
{
return(null);
}
if (edmType == null)
{
throw Error.ArgumentNull(nameof(edmType));
}
if (readContext == null)
{
throw Error.ArgumentNull(nameof(readContext));
}
if (!edmType.IsCollection() || !edmType.AsCollection().ElementType().IsStructured())
{
throw Error.Argument(nameof(edmType), SRResources.TypeMustBeResourceSet, edmType.ToTraceString());
}
ODataDeltaResourceSetWrapper resourceSet = item as ODataDeltaResourceSetWrapper;
if (resourceSet == null)
{
throw Error.Argument(nameof(item), SRResources.ArgumentMustBeOfType, typeof(ODataDeltaResourceSetWrapper).Name);
}
// Recursion guard to avoid stack overflows
RuntimeHelpers.EnsureSufficientExecutionStack();
IEdmStructuredTypeReference elementType = edmType.AsCollection().ElementType().AsStructured();
IEnumerable result = ReadDeltaResourceSet(resourceSet, elementType, readContext);
if (result != null)
{
if (readContext.IsNoClrType)
{
EdmChangedObjectCollection changedObjCollection = new EdmChangedObjectCollection(elementType.Definition as IEdmEntityType);
foreach (IEdmChangedObject changedObject in result)
{
changedObjCollection.Add(changedObject);
}
return(changedObjCollection);
}
else
{
Type elementClrType = readContext.Model.GetClrType(elementType);
Type changedObjCollType = typeof(DeltaSet <>).MakeGenericType(elementClrType);
DeltaSet deltaSet = Activator.CreateInstance(changedObjCollType) as DeltaSet;
foreach (var delta in result)
{
IDeltaItem deltaItem = delta as IDeltaItem;
if (deltaItem != null)
{
deltaSet.Add(deltaItem);
}
}
return(deltaSet);
}
}
else
{
return(result);
}
}
