//============================================================
// ICOMPARABLE IMPLEMENTATION
//============================================================
#region CompareTo(object obj)
/// <summary>
/// Compares the current instance with another object of the same type.
/// </summary>
/// <param name="obj">An object to compare with this instance.</param>
/// <returns>A 32-bit signed integer that indicates the relative order of the objects being compared.</returns>
/// <exception cref="ArgumentException">The <paramref name="obj"/> is not the expected <see cref="Type"/>.</exception>
public int CompareTo(object obj)
{
//------------------------------------------------------------
// If target is a null reference, instance is greater
//------------------------------------------------------------
if (obj == null)
{
return(1);
}
//------------------------------------------------------------
// Determine comparison result using property state of objects
//------------------------------------------------------------
RssSource value = obj as RssSource;
if (value != null)
{
int result = String.Compare(this.Title, value.Title, StringComparison.OrdinalIgnoreCase);
result = result | Uri.Compare(this.Url, value.Url, UriComponents.AbsoluteUri, UriFormat.SafeUnescaped, StringComparison.OrdinalIgnoreCase);
return(result);
}
else
{
throw new ArgumentException(String.Format(null, "obj is not of type {0}, type was found to be '{1}'.", this.GetType().FullName, obj.GetType().FullName), "obj");
}
}
/// <summary>
/// Compares the current instance with another object of the same type.
/// </summary>
/// <param name="obj">An object to compare with this instance.</param>
/// <returns>A 32-bit signed integer that indicates the relative order of the objects being compared.</returns>
/// <exception cref="ArgumentException">The <paramref name="obj"/> is not the expected <see cref="Type"/>.</exception>
public int CompareTo(object obj)
{
if (obj == null)
{
return(1);
}
RssSource value = obj as RssSource;
if (value != null)
{
int result = String.Compare(this.Title, value.Title, StringComparison.OrdinalIgnoreCase);
result = result | Uri.Compare(this.Url, value.Url, UriComponents.AbsoluteUri, UriFormat.SafeUnescaped, StringComparison.OrdinalIgnoreCase);
return(result);
}
else
{
throw new ArgumentException(String.Format(null, "obj is not of type {0}, type was found to be '{1}'.", this.GetType().FullName, obj.GetType().FullName), "obj");
}
}
/// <summary>
/// Loads this <see cref="RssItem"/> using the supplied <see cref="XPathNavigator"/> and <see cref="SyndicationResourceLoadSettings"/>.
/// </summary>
/// <param name="source">The <see cref="XPathNavigator"/> to extract information from.</param>
/// <param name="settings">The <see cref="SyndicationResourceLoadSettings"/> used to configure the load operation.</param>
/// <returns><b>true</b> if the <see cref="RssItem"/> was initialized using the supplied <paramref name="source"/>, otherwise <b>false</b>.</returns>
/// <remarks>
/// This method expects the supplied <paramref name="source"/> to be positioned on the XML element that represents a <see cref="RssItem"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">The <paramref name="source"/> 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>
public bool Load(XPathNavigator source, SyndicationResourceLoadSettings settings)
{
//------------------------------------------------------------
// Local members
//------------------------------------------------------------
bool wasLoaded = false;
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(source, "source");
Guard.ArgumentNotNull(settings, "settings");
//------------------------------------------------------------
// Create namespace resolver
//------------------------------------------------------------
XmlNamespaceManager manager = new XmlNamespaceManager(source.NameTable);
//------------------------------------------------------------
// Attempt to extract syndication information
//------------------------------------------------------------
XPathNavigator authorNavigator = source.SelectSingleNode("author", manager);
XPathNavigator commentsNavigator = source.SelectSingleNode("comments", manager);
XPathNavigator descriptionNavigator = source.SelectSingleNode("description", manager);
XPathNavigator guidNavigator = source.SelectSingleNode("guid", manager);
XPathNavigator linkNavigator = source.SelectSingleNode("link", manager);
XPathNavigator publicationNavigator = source.SelectSingleNode("pubDate", manager);
XPathNavigator sourceNavigator = source.SelectSingleNode("source", manager);
XPathNavigator titleNavigator = source.SelectSingleNode("title", manager);
XPathNodeIterator categoryIterator = source.Select("category", manager);
XPathNodeIterator enclosureIterator = source.Select("enclosure", manager);
//------------------------------------------------------------
// Load required/common item elements
//------------------------------------------------------------
if (titleNavigator != null)
{
this.Title = titleNavigator.Value;
wasLoaded = true;
}
if (descriptionNavigator != null)
{
this.Description = descriptionNavigator.Value;
wasLoaded = true;
}
if (linkNavigator != null)
{
Uri link;
if (Uri.TryCreate(linkNavigator.Value, UriKind.RelativeOrAbsolute, out link))
{
this.Link = link;
wasLoaded = true;
}
}
//------------------------------------------------------------
// Load optional item elements
//------------------------------------------------------------
if (authorNavigator != null)
{
this.Author = authorNavigator.Value;
wasLoaded = true;
}
if (commentsNavigator != null)
{
Uri comments;
if (Uri.TryCreate(commentsNavigator.Value, UriKind.RelativeOrAbsolute, out comments))
{
this.Comments = comments;
wasLoaded = true;
}
}
if (guidNavigator != null)
{
RssGuid guid = new RssGuid();
if (guid.Load(guidNavigator, settings))
{
this.Guid = guid;
wasLoaded = true;
}
}
if (publicationNavigator != null)
{
DateTime publicationDate;
if (SyndicationDateTimeUtility.TryParseRfc822DateTime(publicationNavigator.Value, out publicationDate))
{
this.PublicationDate = publicationDate;
wasLoaded = true;
}
}
if (sourceNavigator != null)
{
RssSource sourceFeed = new RssSource();
if (sourceFeed.Load(sourceNavigator, settings))
{
this.Source = sourceFeed;
wasLoaded = true;
}
}
//------------------------------------------------------------
// Load item collection elements
//------------------------------------------------------------
if (categoryIterator != null && categoryIterator.Count > 0)
{
while (categoryIterator.MoveNext())
{
RssCategory category = new RssCategory();
if (category.Load(categoryIterator.Current, settings))
{
this.Categories.Add(category);
}
}
}
if (enclosureIterator != null && enclosureIterator.Count > 0)
{
while (enclosureIterator.MoveNext())
{
RssEnclosure enclosure = new RssEnclosure();
if (enclosure.Load(enclosureIterator.Current, settings))
{
this.Enclosures.Add(enclosure);
}
}
}
//------------------------------------------------------------
// Attempt to extract syndication extension information
//------------------------------------------------------------
SyndicationExtensionAdapter adapter = new SyndicationExtensionAdapter(source, settings);
adapter.Fill(this);
return(wasLoaded);
}
/// <summary>
/// Loads this <see cref="RssItem"/> using the supplied <see cref="XPathNavigator"/>.
/// </summary>
/// <param name="source">The <see cref="XPathNavigator"/> to extract information from.</param>
/// <returns><b>true</b> if the <see cref="RssItem"/> was initialized using the supplied <paramref name="source"/>, otherwise <b>false</b>.</returns>
/// <remarks>
/// This method expects the supplied <paramref name="source"/> to be positioned on the XML element that represents a <see cref="RssItem"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">The <paramref name="source"/> is a null reference (Nothing in Visual Basic).</exception>
public bool Load(XPathNavigator source)
{
bool wasLoaded = false;
Guard.ArgumentNotNull(source, "source");
XmlNamespaceManager manager = new XmlNamespaceManager(source.NameTable);
XPathNavigator authorNavigator = source.SelectSingleNode("author", manager);
XPathNavigator commentsNavigator = source.SelectSingleNode("comments", manager);
XPathNavigator descriptionNavigator = source.SelectSingleNode("description", manager);
XPathNavigator guidNavigator = source.SelectSingleNode("guid", manager);
XPathNavigator linkNavigator = source.SelectSingleNode("link", manager);
XPathNavigator publicationNavigator = source.SelectSingleNode("pubDate", manager);
XPathNavigator sourceNavigator = source.SelectSingleNode("source", manager);
XPathNavigator titleNavigator = source.SelectSingleNode("title", manager);
XPathNodeIterator categoryIterator = source.Select("category", manager);
XPathNodeIterator enclosureIterator = source.Select("enclosure", manager);
if (titleNavigator != null)
{
this.Title = titleNavigator.Value;
wasLoaded = true;
}
if (descriptionNavigator != null)
{
this.Description = descriptionNavigator.Value;
wasLoaded = true;
}
if (linkNavigator != null)
{
Uri link;
if (Uri.TryCreate(linkNavigator.Value, UriKind.RelativeOrAbsolute, out link))
{
this.Link = link;
wasLoaded = true;
}
}
if (authorNavigator != null)
{
this.Author = authorNavigator.Value;
wasLoaded = true;
}
if (commentsNavigator != null)
{
Uri comments;
if (Uri.TryCreate(commentsNavigator.Value, UriKind.RelativeOrAbsolute, out comments))
{
this.Comments = comments;
wasLoaded = true;
}
}
if (guidNavigator != null)
{
RssGuid guid = new RssGuid();
if (guid.Load(guidNavigator))
{
this.Guid = guid;
wasLoaded = true;
}
}
if (publicationNavigator != null)
{
DateTime publicationDate;
if (SyndicationDateTimeUtility.TryParseRfc822DateTime(publicationNavigator.Value, out publicationDate))
{
this.PublicationDate = publicationDate;
wasLoaded = true;
}
}
if (sourceNavigator != null)
{
RssSource sourceFeed = new RssSource();
if (sourceFeed.Load(sourceNavigator))
{
this.Source = sourceFeed;
wasLoaded = true;
}
}
if (categoryIterator != null && categoryIterator.Count > 0)
{
while (categoryIterator.MoveNext())
{
RssCategory category = new RssCategory();
if (category.Load(categoryIterator.Current))
{
this.Categories.Add(category);
}
}
}
if (enclosureIterator != null && enclosureIterator.Count > 0)
{
while (enclosureIterator.MoveNext())
{
RssEnclosure enclosure = new RssEnclosure();
if (enclosure.Load(enclosureIterator.Current))
{
this.Enclosures.Add(enclosure);
}
}
}
return(wasLoaded);
}
/// <summary>
/// Loads this <see cref="RssItem"/> using the supplied <see cref="XPathNavigator"/> and <see cref="SyndicationResourceLoadSettings"/>.
/// </summary>
/// <param name="source">The <see cref="XPathNavigator"/> to extract information from.</param>
/// <param name="settings">The <see cref="SyndicationResourceLoadSettings"/> used to configure the load operation.</param>
/// <returns><b>true</b> if the <see cref="RssItem"/> was initialized using the supplied <paramref name="source"/>, otherwise <b>false</b>.</returns>
/// <remarks>
/// This method expects the supplied <paramref name="source"/> to be positioned on the XML element that represents a <see cref="RssItem"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">The <paramref name="source"/> 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>
public bool Load(XPathNavigator source, SyndicationResourceLoadSettings settings)
{
//------------------------------------------------------------
// Local members
//------------------------------------------------------------
bool wasLoaded = false;
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(source, "source");
Guard.ArgumentNotNull(settings, "settings");
//------------------------------------------------------------
// Create namespace resolver
//------------------------------------------------------------
XmlNamespaceManager manager = new XmlNamespaceManager(source.NameTable);
//------------------------------------------------------------
// Attempt to extract syndication information
//------------------------------------------------------------
XPathNavigator authorNavigator = source.SelectSingleNode("author", manager);
XPathNavigator commentsNavigator = source.SelectSingleNode("comments", manager);
XPathNavigator descriptionNavigator = source.SelectSingleNode("description", manager);
XPathNavigator guidNavigator = source.SelectSingleNode("guid", manager);
XPathNavigator linkNavigator = source.SelectSingleNode("link", manager);
XPathNavigator publicationNavigator = source.SelectSingleNode("pubDate", manager);
XPathNavigator sourceNavigator = source.SelectSingleNode("source", manager);
XPathNavigator titleNavigator = source.SelectSingleNode("title", manager);
XPathNodeIterator categoryIterator = source.Select("category", manager);
XPathNodeIterator enclosureIterator = source.Select("enclosure", manager);
//------------------------------------------------------------
// Load required/common item elements
//------------------------------------------------------------
if (titleNavigator != null)
{
this.Title = titleNavigator.Value;
wasLoaded = true;
}
if (descriptionNavigator != null)
{
this.Description = descriptionNavigator.Value;
wasLoaded = true;
}
if (linkNavigator != null)
{
Uri link;
if (Uri.TryCreate(linkNavigator.Value, UriKind.RelativeOrAbsolute, out link))
{
this.Link = link;
wasLoaded = true;
}
}
//------------------------------------------------------------
// Load optional item elements
//------------------------------------------------------------
if (authorNavigator != null)
{
this.Author = authorNavigator.Value;
wasLoaded = true;
}
if (commentsNavigator != null)
{
Uri comments;
if (Uri.TryCreate(commentsNavigator.Value, UriKind.RelativeOrAbsolute, out comments))
{
this.Comments = comments;
wasLoaded = true;
}
}
if (guidNavigator != null)
{
RssGuid guid = new RssGuid();
if (guid.Load(guidNavigator, settings))
{
this.Guid = guid;
wasLoaded = true;
}
}
if (publicationNavigator != null)
{
DateTime publicationDate;
if (SyndicationDateTimeUtility.TryParseRfc822DateTime(publicationNavigator.Value, out publicationDate))
{
this.PublicationDate = publicationDate;
wasLoaded = true;
}
}
if (sourceNavigator != null)
{
RssSource sourceFeed = new RssSource();
if (sourceFeed.Load(sourceNavigator, settings))
{
this.Source = sourceFeed;
wasLoaded = true;
}
}
//------------------------------------------------------------
// Load item collection elements
//------------------------------------------------------------
if (categoryIterator != null && categoryIterator.Count > 0)
{
while (categoryIterator.MoveNext())
{
RssCategory category = new RssCategory();
if (category.Load(categoryIterator.Current, settings))
{
this.Categories.Add(category);
}
}
}
if (enclosureIterator != null && enclosureIterator.Count > 0)
{
while (enclosureIterator.MoveNext())
{
RssEnclosure enclosure = new RssEnclosure();
if (enclosure.Load(enclosureIterator.Current, settings))
{
this.Enclosures.Add(enclosure);
}
}
}
//------------------------------------------------------------
// Attempt to extract syndication extension information
//------------------------------------------------------------
SyndicationExtensionAdapter adapter = new SyndicationExtensionAdapter(source, settings);
adapter.Fill(this);
return wasLoaded;
}
