/////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/// <summary>Event chaining. We catch this by the baseFeedParsers, which
/// would not do anything with the gathered data. We pass the event up
/// to the user; if the user doesn't discard it, we add the entry to our
/// collection</summary>
/// <param name="sender"> the object which send the event</param>
/// <param name="e">FeedParserEventArguments, holds the feed entry</param>
/// <returns> </returns>
//////////////////////////////////////////////////////////////////////
protected void OnNewExtensionElement(object sender, ExtensionElementEventArgs e)
{
// by default, if our event chain is not hooked, the underlying parser will add it
Tracing.TraceCall("received new extension element notification");
Tracing.Assert(e != null, "e should not be null");
if (e == null)
{
throw new ArgumentNullException("e");
}
if (this.NewExtensionElement != null)
{
Tracing.TraceMsg("\t calling event dispatcher");
this.NewExtensionElement(sender, e);
}
}
/// <summary>eventfiring helper for new extensions</summary>
/// <param name="node"> the new node that was found</param>
/// <param name="baseObject"> the object this node should be added to</param>
protected void OnNewExtensionElement(XmlNode node, AtomBase baseObject)
{
ExtensionElementEventArgs args = new ExtensionElementEventArgs();
args.ExtensionElement = node;
args.Base = baseObject;
if (this.NewExtensionElement != null)
{
this.NewExtensionElement(this, args);
}
if (!args.DiscardEntry)
{
baseObject.ExtensionElements.Add(new XmlExtension(node));
}
}
/// <summary>eventhandler - called for event extension element
/// </summary>
/// <param name="sender">the object which send the event</param>
/// <param name="e">FeedParserEventArguments, holds the feedEntry</param>
/// <returns> </returns>
protected void OnNewExtensionsElement(object sender, ExtensionElementEventArgs e)
{
if (e == null)
{
throw new ArgumentNullException("e");
}
AtomFeedParser parser = sender as AtomFeedParser;
if (e.Base.XmlName == AtomParserNameTable.XmlAtomEntryElement)
{
// the base is the Entry of the feed, let's call our parsing on the Entry
AtomEntry entry = e.Base as AtomEntry;
if (entry != null)
{
entry.Parse(e, parser);
}
}
else
{
HandleExtensionElements(e, parser);
}
}
/// <summary>
/// Parses the inner state of the element
/// </summary>
/// <param name="e">The extension element that should be added to this entry</param>
/// <param name="parser">The AtomFeedParser that called this</param>
public virtual void Parse(ExtensionElementEventArgs e, AtomFeedParser parser)
{
if (e == null)
{
throw new ArgumentNullException("e");
}
Tracing.TraceMsg("Entering Parse on AbstractEntry");
XmlNode node = e.ExtensionElement;
if (this.ExtensionFactories != null && this.ExtensionFactories.Count > 0)
{
Tracing.TraceMsg("Entring default Parsing for AbstractEntry");
IExtensionElementFactory f = FindExtensionFactory(node.LocalName,
node.NamespaceURI);
if (f != null)
{
this.ExtensionElements.Add(f.CreateInstance(node, parser));
e.DiscardEntry = true;
}
}
}
/// <summary>
/// event on the Feed to handle extension elements during parsing
/// </summary>
/// <param name="e">the event arguments</param>
/// <param name="parser">the parser that caused this</param>
protected virtual void HandleExtensionElements(ExtensionElementEventArgs e, AtomFeedParser parser)
{
Tracing.TraceMsg("Entering HandleExtensionElements on AbstractFeed");
XmlNode node = e.ExtensionElement;
if (this.ExtensionFactories != null && this.ExtensionFactories.Count > 0)
{
Tracing.TraceMsg("Entring default Parsing for AbstractFeed");
foreach (IExtensionElementFactory f in this.ExtensionFactories)
{
Tracing.TraceMsg("Found extension Factories");
if (String.Compare(node.NamespaceURI, f.XmlNameSpace, true, CultureInfo.InvariantCulture) == 0)
{
if (String.Compare(node.LocalName, f.XmlName, true, CultureInfo.InvariantCulture) == 0)
{
e.Base.ExtensionElements.Add(f.CreateInstance(node, parser));
e.DiscardEntry = true;
break;
}
}
}
}
return;
}