/// <summary>
/// read the m2:count tag in the feed
/// </summary>
private void ReadCountValue()
{
Debug.Assert(this.countValue == CountStateInitial, "Count value is not in the initial state");
if (this.materializer.CurrentFeed != null &&
this.materializer.CurrentFeed.Count.HasValue)
{
this.countValue = this.materializer.CurrentFeed.Count.Value;
return;
}
// find the first element tag
while (this.reader.NodeType != XmlNodeType.Element && this.reader.Read())
{
}
if (this.reader.EOF)
{
throw new InvalidOperationException(Strings.MaterializeFromAtom_CountNotPresent);
}
// the tag Should only be <feed> or <links> tag:
Debug.Assert(
(Util.AreSame(XmlConstants.AtomNamespace, this.reader.NamespaceURI) &&
Util.AreSame(XmlConstants.AtomFeedElementName, this.reader.LocalName)) ||
(Util.AreSame(XmlConstants.DataWebNamespace, this.reader.NamespaceURI) &&
Util.AreSame(XmlConstants.LinkCollectionElementName, this.reader.LocalName)),
"<feed> or <links> tag expected");
// Create the XElement for look-ahead
// DEVNOTE([....]):
// This is not streaming friendly!
XElement element = XElement.Load(this.reader);
this.reader.Close();
// Read the count value from the xelement
XElement countNode = element.Descendants(XNamespace.Get(XmlConstants.DataWebMetadataNamespace) + XmlConstants.RowCountElement).FirstOrDefault();
if (countNode == null)
{
throw new InvalidOperationException(Strings.MaterializeFromAtom_CountNotPresent);
}
else
{
if (!long.TryParse(countNode.Value, System.Globalization.NumberStyles.Integer, System.Globalization.CultureInfo.InvariantCulture, out this.countValue))
{
throw new FormatException(Strings.MaterializeFromAtom_CountFormatError);
}
if (this.countValue < 0)
{
throw new FormatException(Strings.MaterializeFromAtom_CountFormatError);
}
}
this.reader = new System.Data.Services.Client.Xml.XmlAtomErrorReader(element.CreateReader());
this.parser.ReplaceReader(this.reader);
}
private static AtomDataKind ParseStateForReader(XmlReader reader)
{
Debug.Assert(reader != null, "reader != null");
Debug.Assert(
reader.NodeType == XmlNodeType.Element || reader.NodeType == XmlNodeType.EndElement,
"reader.NodeType == XmlNodeType.Element || EndElement -- otherwise can't determine");
AtomDataKind result = AtomDataKind.Custom;
string elementName = reader.LocalName;
string namespaceURI = reader.NamespaceURI;
if (Util.AreSame(XmlConstants.AtomNamespace, namespaceURI))
{
if (Util.AreSame(XmlConstants.AtomEntryElementName, elementName))
{
result = AtomDataKind.Entry;
}
else if (Util.AreSame(XmlConstants.AtomFeedElementName, elementName))
{
result = AtomDataKind.Feed;
}
else if (Util.AreSame(XmlConstants.AtomLinkElementName, elementName) &&
Util.AreSame(XmlConstants.AtomLinkNextAttributeString, reader.GetAttribute(XmlConstants.AtomLinkRelationAttributeName)))
{
result = AtomDataKind.PagingLinks;
}
}
else if (Util.AreSame(XmlConstants.DataWebMetadataNamespace, namespaceURI))
{
if (Util.AreSame(XmlConstants.RowCountElement, elementName))
{
result = AtomDataKind.FeedCount;
}
}
return(result);
}
