private void StartNavigationLink(ODataAtomReaderNavigationLinkDescriptor navigationLinkDescriptor)
{
IEdmEntityType expectedEntityType = null;
if (navigationLinkDescriptor.NavigationProperty != null)
{
IEdmTypeReference type = navigationLinkDescriptor.NavigationProperty.Type;
if (!type.IsCollection())
{
if (navigationLinkDescriptor.NavigationLink.IsCollection == true)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataAtomReader_FeedNavigationLinkForResourceReferenceProperty(navigationLinkDescriptor.NavigationLink.Name));
}
navigationLinkDescriptor.NavigationLink.IsCollection = false;
expectedEntityType = type.AsEntity().EntityDefinition();
}
else
{
if (!navigationLinkDescriptor.NavigationLink.IsCollection.HasValue)
{
navigationLinkDescriptor.NavigationLink.IsCollection = true;
}
expectedEntityType = type.AsCollection().ElementType().AsEntity().EntityDefinition();
}
}
this.EnterScope(ODataReaderState.NavigationLinkStart, navigationLinkDescriptor.NavigationLink, expectedEntityType);
((AtomScope)base.CurrentScope).NavigationProperty = navigationLinkDescriptor.NavigationProperty;
}
protected override bool ReadAtEntryStartImplementation()
{
if (base.CurrentEntry == null)
{
this.EndEntry();
}
else if ((this.atomEntryAndFeedDeserializer.XmlReader.NodeType == XmlNodeType.EndElement) || this.CurrentEntryState.EntryElementEmpty)
{
this.EndEntry();
}
else if (this.atomInputContext.UseServerApiBehavior)
{
ODataAtomReaderNavigationLinkDescriptor navigationLinkDescriptor = this.atomEntryAndFeedDeserializer.ReadEntryContent(this.CurrentEntryState);
if (navigationLinkDescriptor == null)
{
this.EndEntry();
}
else
{
this.StartNavigationLink(navigationLinkDescriptor);
}
}
else
{
this.StartNavigationLink(this.CurrentEntryState.FirstNavigationLinkDescriptor);
}
return(true);
}
protected override bool ReadAtNavigationLinkEndImplementation()
{
this.atomEntryAndFeedDeserializer.ReadNavigationLinkEnd();
base.PopScope(ODataReaderState.NavigationLinkEnd);
ODataAtomReaderNavigationLinkDescriptor navigationLinkDescriptor = this.atomEntryAndFeedDeserializer.ReadEntryContent(this.CurrentEntryState);
if (navigationLinkDescriptor == null)
{
this.EndEntry();
}
else
{
this.StartNavigationLink(navigationLinkDescriptor);
}
return(true);
}
private void StartNavigationLink(ODataAtomReaderNavigationLinkDescriptor navigationLinkDescriptor)
{
IEdmEntityType expectedEntityType = null;
if (navigationLinkDescriptor.NavigationProperty != null)
{
IEdmTypeReference type = navigationLinkDescriptor.NavigationProperty.Type;
if (!type.IsCollection())
{
if (navigationLinkDescriptor.NavigationLink.IsCollection == true)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataAtomReader_FeedNavigationLinkForResourceReferenceProperty(navigationLinkDescriptor.NavigationLink.Name));
}
navigationLinkDescriptor.NavigationLink.IsCollection = false;
expectedEntityType = type.AsEntity().EntityDefinition();
}
else
{
if (!navigationLinkDescriptor.NavigationLink.IsCollection.HasValue)
{
navigationLinkDescriptor.NavigationLink.IsCollection = true;
}
expectedEntityType = type.AsCollection().ElementType().AsEntity().EntityDefinition();
}
}
this.EnterScope(ODataReaderState.NavigationLinkStart, navigationLinkDescriptor.NavigationLink, expectedEntityType);
((AtomScope) base.CurrentScope).NavigationProperty = navigationLinkDescriptor.NavigationProperty;
}
/// <summary>
/// Starts the navigation link.
/// Does metadata validation of the navigation link and sets up the reader to report it.
/// </summary>
/// <param name="navigationLinkDescriptor">The navigation link descriptor for the navigation link to start.</param>
private void StartNavigationLink(ODataAtomReaderNavigationLinkDescriptor navigationLinkDescriptor)
{
Debug.Assert(navigationLinkDescriptor != null, "navigationLink != null");
Debug.Assert(!string.IsNullOrEmpty(navigationLinkDescriptor.NavigationLink.Name), "Found navigation link without a name, or with empty name.");
Debug.Assert(
navigationLinkDescriptor.NavigationProperty == null || navigationLinkDescriptor.NavigationLink.Name == navigationLinkDescriptor.NavigationProperty.Name,
"The navigation link doesn't match the navigation property.");
Debug.Assert(
navigationLinkDescriptor.NavigationProperty != null || !this.atomInputContext.Model.IsUserModel() ||
this.atomInputContext.MessageReaderSettings.UndeclaredPropertyBehaviorKinds.HasFlag(ODataUndeclaredPropertyBehaviorKinds.ReportUndeclaredLinkProperty),
"We don't support open navigation links yet, so either we must not have a model or the reading of undeclared nav. props needs to be allowed.");
this.atomEntryAndFeedDeserializer.AssertXmlCondition(XmlNodeType.Element);
Debug.Assert(
this.atomEntryAndFeedDeserializer.XmlReader.LocalName == AtomConstants.AtomLinkElementName &&
this.atomEntryAndFeedDeserializer.XmlReader.NamespaceURI == AtomConstants.AtomNamespace,
"The reader must be on atom:link element.");
IEdmEntityType targetEntityType = null;
if (navigationLinkDescriptor.NavigationProperty != null)
{
IEdmTypeReference navigationPropertyType = navigationLinkDescriptor.NavigationProperty.Type;
if (!navigationPropertyType.IsCollection())
{
if (navigationLinkDescriptor.NavigationLink.IsCollection == true)
{
throw new ODataException(o.Strings.ODataAtomReader_FeedNavigationLinkForResourceReferenceProperty(navigationLinkDescriptor.NavigationLink.Name));
}
// Set it to false, it's either already set, or it's null.
navigationLinkDescriptor.NavigationLink.IsCollection = false;
targetEntityType = navigationPropertyType.AsEntity().EntityDefinition();
}
else
{
if (!navigationLinkDescriptor.NavigationLink.IsCollection.HasValue)
{
// Only set collection to true if it was not set already. We need the payload to win so that we can later validate
// that if the link is expanded, the expansion is a feed.
navigationLinkDescriptor.NavigationLink.IsCollection = true;
}
targetEntityType = navigationPropertyType.AsCollection().ElementType().AsEntity().EntityDefinition();
}
}
this.EnterScope(ODataReaderState.NavigationLinkStart, navigationLinkDescriptor.NavigationLink, targetEntityType);
// Store a reference to the navigation property in the scope, so that we could validate cardinality of the link when reading it.
((AtomScope)this.CurrentScope).NavigationProperty = navigationLinkDescriptor.NavigationProperty;
}
