/// <summary>
/// Attempts to read the current element as an annotation element.
/// </summary>
/// <param name="annotation">If this method returned true, this is the instance annotation information from the parsed element.</param>
/// <returns>true if the element was an annotation element, false if it wasn't.</returns>
/// <remarks>
/// Pre-Condition: XmlNodeType.Element - The element to read.
/// Post-Condition: XmlNodeType.EndElement - The end tag of the element (if the element was a non-empty annotation element).
/// XmlNodeType.Element - The same element as the pre-condition if this method returned false, or an empty annotation element.
/// </remarks>
internal bool TryReadAnnotation(out AtomInstanceAnnotation annotation)
{
DebugUtils.CheckNoExternalCallers();
BufferingXmlReader xmlReader = this.inputContext.XmlReader;
Debug.Assert(xmlReader != null, "xmlReader != null");
Debug.Assert(xmlReader.NodeType == XmlNodeType.Element, "xmlReader must be positioned on an Element");
annotation = null;
if (this.propertyAndValueDeserializer.MessageReaderSettings.ShouldIncludeAnnotation != null &&
xmlReader.NamespaceEquals(this.odataMetadataNamespace) &&
xmlReader.LocalNameEquals(this.attributeElementName))
{
annotation = AtomInstanceAnnotation.CreateFrom(this.inputContext, this.propertyAndValueDeserializer);
}
return(annotation != null);
}
/// <summary>
/// Writes the collection of <see cref="ODataInstanceAnnotation"/> to the ATOM payload.
/// </summary>
/// <param name="instanceAnnotations">The collection of <see cref="ODataInstanceAnnotation"/> to write.</param>
/// <param name="tracker">Helper class to track if an annotation has been writen.</param>
private void WriteInstanceAnnotations(IEnumerable <ODataInstanceAnnotation> instanceAnnotations, InstanceAnnotationWriteTracker tracker)
{
IEnumerable <AtomInstanceAnnotation> atomInstanceAnnotations = instanceAnnotations.Select(instanceAnnotation => AtomInstanceAnnotation.CreateFrom(instanceAnnotation, /*target*/ null));
this.atomEntryAndFeedSerializer.WriteInstanceAnnotations(atomInstanceAnnotations, tracker);
}
