private void WriteDeltaFeedAnnotationsAndValidatePayload(Action <ODataWriter> action, IEdmEntitySet entitySet, string expectedPayload)
{
var writerSettings = new ODataMessageWriterSettings {
EnableMessageStreamDisposal = false
};
writerSettings.SetServiceDocumentUri(new Uri("http://www.example.com/"));
MemoryStream stream = new MemoryStream();
IODataResponseMessage responseMessageToWrite = new InMemoryMessage {
StatusCode = 200, Stream = stream
};
responseMessageToWrite.PreferenceAppliedHeader().AnnotationFilter = "*";
using (var messageWriter = new ODataMessageWriter(responseMessageToWrite, writerSettings, Model))
{
ODataWriter odataDeltaWriter = messageWriter.CreateODataDeltaResourceSetWriter(entitySet, EntityType);
action(odataDeltaWriter);
}
stream.Position = 0;
string payload = (new StreamReader(stream)).ReadToEnd();
Assert.Equal(expectedPayload, payload);
}
/// <inheritdoc />
public override void WriteObject(object graph, Type type, ODataMessageWriter messageWriter, ODataSerializerContext writeContext)
{
if (messageWriter == null)
{
throw Error.ArgumentNull("messageWriter");
}
if (writeContext == null)
{
throw Error.ArgumentNull("writeContext");
}
if (graph == null)
{
throw new SerializationException(Error.Format(SRResources.CannotSerializerNull, DeltaFeed));
}
IEdmEntitySetBase entitySet = writeContext.NavigationSource as IEdmEntitySetBase;
if (entitySet == null)
{
throw new SerializationException(SRResources.EntitySetMissingDuringSerialization);
}
IEdmTypeReference feedType = writeContext.GetEdmType(graph, type);
Contract.Assert(feedType != null);
IEdmEntityTypeReference entityType = GetResourceType(feedType).AsEntity();
ODataWriter writer = messageWriter.CreateODataDeltaResourceSetWriter(entitySet, entityType.EntityDefinition());
WriteDeltaFeedInline(graph, feedType, writer, writeContext);
}