/// <summary>
/// Modifies the <see cref="BlogMLPost"/> collection entities to match the supplied <see cref="XPathNavigator"/> data source.
/// </summary>
/// <param name="post">The <see cref="BlogMLPost"/> to be filled.</param>
/// <param name="source">The <see cref="XPathNavigator"/> to extract information from.</param>
/// <param name="manager">The <see cref="XmlNamespaceManager"/> used to resolve XML namespace prefixes.</param>
/// <param name="settings">The <see cref="SyndicationResourceLoadSettings"/> used to configure the load operation.</param>
/// <remarks>
/// This method expects the supplied <paramref name="source"/> to be positioned on the XML element that represents a <see cref="BlogMLPost"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">The <paramref name="post"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="source"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="manager"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="settings"/> is a null reference (Nothing in Visual Basic).</exception>
private static bool FillPostCollections(BlogMLPost post, XPathNavigator source, XmlNamespaceManager manager, SyndicationResourceLoadSettings settings)
{
//------------------------------------------------------------
// Local members
//------------------------------------------------------------
bool wasLoaded = false;
//------------------------------------------------------------
// Validate parameters
//------------------------------------------------------------
Guard.ArgumentNotNull(post, "post");
Guard.ArgumentNotNull(source, "source");
Guard.ArgumentNotNull(manager, "manager");
Guard.ArgumentNotNull(settings, "settings");
//------------------------------------------------------------
// Attempt to extract syndication information
//------------------------------------------------------------
XPathNodeIterator categoriesIterator = source.Select("blog:categories/blog:category", manager);
XPathNodeIterator commentsIterator = source.Select("blog:comments/blog:comment", manager);
XPathNodeIterator trackbacksIterator = source.Select("blog:trackbacks/blog:trackback", manager);
XPathNodeIterator attachmentsIterator = source.Select("blog:attachments/blog:attachment", manager);
XPathNodeIterator authorsIterator = source.Select("blog:authors/blog:author", manager);
if (categoriesIterator != null && categoriesIterator.Count > 0)
{
while (categoriesIterator.MoveNext())
{
string referenceId = categoriesIterator.Current.GetAttribute("ref", String.Empty);
if (!String.IsNullOrEmpty(referenceId))
{
post.Categories.Add(referenceId);
wasLoaded = true;
}
}
}
if (commentsIterator != null && commentsIterator.Count > 0)
{
while (commentsIterator.MoveNext())
{
BlogMLComment comment = new BlogMLComment();
if (comment.Load(commentsIterator.Current, settings))
{
post.Comments.Add(comment);
wasLoaded = true;
}
}
}
if (trackbacksIterator != null && trackbacksIterator.Count > 0)
{
while (trackbacksIterator.MoveNext())
{
BlogMLTrackback trackback = new BlogMLTrackback();
if (trackback.Load(trackbacksIterator.Current, settings))
{
post.Trackbacks.Add(trackback);
wasLoaded = true;
}
}
}
if (attachmentsIterator != null && attachmentsIterator.Count > 0)
{
while (attachmentsIterator.MoveNext())
{
BlogMLAttachment attachment = new BlogMLAttachment();
if (attachment.Load(attachmentsIterator.Current, settings))
{
post.Attachments.Add(attachment);
wasLoaded = true;
}
}
}
if (authorsIterator != null && authorsIterator.Count > 0)
{
while (authorsIterator.MoveNext())
{
string referenceId = authorsIterator.Current.GetAttribute("ref", String.Empty);
if (!String.IsNullOrEmpty(referenceId))
{
post.Authors.Add(referenceId);
wasLoaded = true;
}
}
}
return wasLoaded;
}