private void WriteFeed(object graph, ODataWriter writer, ODataSerializerContext writeContext)
{
ODataSerializer entrySerializer = SerializerProvider.GetEdmTypeSerializer(_edmCollectionType.ElementType());
if (entrySerializer == null)
{
throw Error.NotSupported(SRResources.TypeCannotBeSerialized, _edmCollectionType.ElementType(), typeof(ODataMediaTypeFormatter).Name);
}
Contract.Assert(entrySerializer.ODataPayloadKind == ODataPayloadKind.Entry);
IEnumerable enumerable = graph as IEnumerable; // Data to serialize
if (enumerable != null)
{
ODataFeed feed = new ODataFeed();
if (writeContext.EntitySet != null)
{
IEntitySetLinkBuilder linkBuilder = SerializerProvider.EdmModel.GetEntitySetLinkBuilder(writeContext.EntitySet);
Uri feedSelfLink = linkBuilder.BuildFeedSelfLink(new FeedContext(writeContext.EntitySet, writeContext.UrlHelper, graph));
if (feedSelfLink != null)
{
feed.SetAnnotation(new AtomFeedMetadata()
{
SelfLink = new AtomLinkMetadata()
{
Relation = SelfLinkRelation, Href = feedSelfLink
}
});
}
}
// TODO: Bug 467590: remove the hardcoded feed id. Get support for it from the model builder ?
feed.Id = FeedNamespace + _edmCollectionType.FullName();
// If we have more OData format specific information apply it now.
ODataResult odataFeedAnnotations = graph as ODataResult;
if (odataFeedAnnotations != null)
{
feed.Count = odataFeedAnnotations.Count;
feed.NextPageLink = odataFeedAnnotations.NextPageLink;
}
writer.WriteStart(feed);
foreach (object entry in enumerable)
{
entrySerializer.WriteObjectInline(entry, writer, writeContext);
}
writer.WriteEnd();
}
}
private void WriteNavigationLinks(EntityInstanceContext context, ODataWriter writer, ODataSerializerWriteContext writeContext)
{
foreach (IEdmNavigationProperty navProperty in _edmEntityTypeReference.NavigationProperties())
{
IEdmTypeReference propertyType = navProperty.Type;
object propertyValue = context.EntityInstance.GetType().GetProperty(navProperty.Name).GetValue(context.EntityInstance, index: null);
if (writeContext.EntitySet != null)
{
IEdmEntitySet currentEntitySet = writeContext.EntitySet.FindNavigationTarget(navProperty);
IEntitySetLinkBuilder linkBuilder = SerializerProvider.EdmModel.GetEntitySetLinkBuilder(writeContext.EntitySet);
ODataNavigationLink navigationLink = new ODataNavigationLink
{
IsCollection = propertyType.IsCollection(),
Name = navProperty.Name,
Url = linkBuilder.BuildNavigationLink(context, navProperty)
};
ODataQueryProjectionNode expandNode = null;
if (writeContext.CurrentProjectionNode != null)
{
expandNode = writeContext.CurrentProjectionNode.Expands.FirstOrDefault(p => p.Name == navProperty.Name);
}
if (expandNode != null && propertyValue != null)
{
writer.WriteStart(navigationLink);
ODataSerializer serializer = SerializerProvider.GetEdmTypeSerializer(propertyType);
if (serializer == null)
{
throw Error.NotSupported(SRResources.TypeCannotBeSerialized, navProperty.Type.FullName(), typeof(ODataMediaTypeFormatter).Name);
}
ODataSerializerWriteContext childWriteContext = new ODataSerializerWriteContext(writeContext.ResponseContext);
childWriteContext.UrlHelper = writeContext.UrlHelper;
childWriteContext.EntitySet = currentEntitySet;
childWriteContext.RootProjectionNode = writeContext.RootProjectionNode;
childWriteContext.CurrentProjectionNode = expandNode;
serializer.WriteObjectInline(propertyValue, writer, childWriteContext);
writer.WriteEnd();
}
else if (!writeContext.IsRequest)
{
// delayed links cannot be written on requests
writer.WriteStart(navigationLink);
writer.WriteEnd();
}
}
}
}
private void WriteFeed(object graph, ODataWriter writer, ODataSerializerContext writeContext)
{
IEnumerable enumerable = graph as IEnumerable; // Data to serialize
if (enumerable != null)
{
ODataFeed feed = new ODataFeed();
if (writeContext.EntitySet != null)
{
IEntitySetLinkBuilder linkBuilder = SerializerProvider.EdmModel.GetEntitySetLinkBuilder(writeContext.EntitySet);
FeedContext feedContext = new FeedContext
{
EntitySet = writeContext.EntitySet,
UrlHelper = writeContext.UrlHelper,
PathHandler = writeContext.PathHandler,
FeedInstance = graph
};
Uri feedSelfLink = linkBuilder.BuildFeedSelfLink(feedContext);
if (feedSelfLink != null)
{
feed.SetAnnotation(new AtomFeedMetadata()
{
SelfLink = new AtomLinkMetadata()
{
Relation = SelfLinkRelation, Href = feedSelfLink
}
});
}
}
// TODO: Bug 467590: remove the hardcoded feed id. Get support for it from the model builder ?
feed.Id = FeedNamespace + _edmCollectionType.FullName();
// If we have more OData format specific information apply it now.
ODataResult odataFeedAnnotations = graph as ODataResult;
if (odataFeedAnnotations != null)
{
feed.Count = odataFeedAnnotations.Count;
feed.NextPageLink = odataFeedAnnotations.NextPageLink;
}
else
{
object nextPageLinkPropertyValue;
HttpRequestMessage request = writeContext.Request;
if (request != null && request.Properties.TryGetValue(ODataQueryOptions.NextPageLinkPropertyKey, out nextPageLinkPropertyValue))
{
Uri nextPageLink = nextPageLinkPropertyValue as Uri;
if (nextPageLink != null)
{
feed.NextPageLink = nextPageLink;
}
}
}
writer.WriteStart(feed);
foreach (object entry in enumerable)
{
if (entry == null)
{
throw Error.NotSupported(SRResources.NullElementInCollection);
}
ODataSerializer entrySerializer = SerializerProvider.GetODataPayloadSerializer(entry.GetType());
if (entrySerializer == null)
{
throw Error.NotSupported(SRResources.TypeCannotBeSerialized, entry.GetType(), typeof(ODataMediaTypeFormatter).Name);
}
Contract.Assert(entrySerializer.ODataPayloadKind == ODataPayloadKind.Entry);
entrySerializer.WriteObjectInline(entry, writer, writeContext);
}
writer.WriteEnd();
}
}
