private static EntityReferenceCollection GetEntityReferences(
ODataNavigationLinkWithItems navigationLinkWrapper,
ODataDeserializerContext readContext)
{
var referenceCollection = new EntityReferenceCollection();
foreach (var childItem in navigationLinkWrapper.NestedItems.OfType <ODataEntityReferenceLinkBase>())
{
var uriParser = readContext.Request.GetODataUriParser(childItem.EntityReferenceLink.Url);
referenceCollection.Add(uriParser.ParsePath());
}
return(referenceCollection);
}
public override void ApplyNavigationProperty(
object entityResource,
ODataNavigationLinkWithItems navigationLinkWrapper,
IEdmEntityTypeReference entityType,
ODataDeserializerContext readContext)
{
base.ApplyNavigationProperty(entityResource, navigationLinkWrapper, entityType, readContext);
var referenceCollection = GetEntityReferences(navigationLinkWrapper, readContext);
if (referenceCollection.Any())
{
if (!entityResource.As <EdmStructuredObject>().TrySetPropertyValue(navigationLinkWrapper.NavigationLink.Name, referenceCollection))
{
throw new InvalidOperationException("Unable to set entity reference links as navigation property value.");
}
}
}
/// <summary>
/// Десериализует navigation property.
/// Также выполняет необходимые действия, чтобы обработка @odata.bind выполнялась по стандарту OData.
/// </summary>
/// <param name="entityResource">Объект, в который navigation property будет прочитано.</param>
/// <param name="navigationLinkWrapper">navigation линк.</param>
/// <param name="entityType">Тип сущности.</param>
/// <param name="readContext">Состояние и установки, используемые при чтении.</param>
public override void ApplyNavigationProperty(
object entityResource,
ODataNavigationLinkWithItems navigationLinkWrapper,
IEdmEntityTypeReference entityType,
ODataDeserializerContext readContext)
{
base.ApplyNavigationProperty(entityResource, navigationLinkWrapper, entityType, readContext);
EdmEntityObject edmEntity = (EdmEntityObject)entityResource;
DataObjectEdmModel model = readContext.Model as DataObjectEdmModel;
foreach (var childItem in navigationLinkWrapper.NestedItems)
{
if (!readContext.Request.Properties.ContainsKey(Dictionary))
{
readContext.Request.Properties.Add(Dictionary, new Dictionary <string, object>());
}
var dictionary = (Dictionary <string, object>)readContext.Request.Properties[Dictionary];
var navigationPropertyName = navigationLinkWrapper.NavigationLink.Name;
var entityReferenceLink = childItem as ODataEntityReferenceLinkBase;
if (entityReferenceLink != null)
{
Uri referencedEntityUrl = entityReferenceLink.EntityReferenceLink.Url;
if (referencedEntityUrl.IsAbsoluteUri)
{
referencedEntityUrl = referencedEntityUrl.MakeRelativeUri(readContext.Request.RequestUri);
}
var segments = referencedEntityUrl.OriginalString.Split(new[] { '(', ')' }, StringSplitOptions.RemoveEmptyEntries);
if (segments.Length != 2)
{
throw new ApplicationException($"Invalid @odata.bind: {referencedEntityUrl.OriginalString}");
}
var type = model.GetDataObjectType(segments[0]);
if (type == null)
{
throw new ApplicationException($"Invalid entity set: {segments[0]}");
}
Guid guid;
try
{
guid = new Guid(segments[1]);
}
catch (Exception)
{
throw new ApplicationException($"Invalid guid: {segments[1]}");
}
var linkedEdmEntity = new EdmEntityObject(model.GetEdmEntityType(type));
linkedEdmEntity.TrySetPropertyValue("__PrimaryKey", guid);
edmEntity.TrySetPropertyValue(navigationPropertyName, linkedEdmEntity);
if (!dictionary.ContainsKey(navigationPropertyName))
{
dictionary.Add(navigationPropertyName, navigationPropertyName);
}
}
var feed = childItem as ODataFeedWithEntries;
if (childItem == null || (feed != null && feed.Entries.Count == 0))
{
edmEntity.TrySetPropertyValue(navigationPropertyName, null);
if (!dictionary.ContainsKey(navigationPropertyName))
{
dictionary.Add(navigationPropertyName, null);
}
}
}
}