296 lines
8.2 KiB
C#
296 lines
8.2 KiB
C#
//
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// SyndicationItem.cs
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//
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// Author:
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// Atsushi Enomoto <atsushi@ximian.com>
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//
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// Copyright (C) 2007 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.IO;
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using System.Runtime.Serialization;
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using System.Text;
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using System.Xml;
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namespace System.ServiceModel.Syndication
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{
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public class SyndicationItem : ISyndicationElement
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{
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public static SyndicationItem Load (XmlReader reader)
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{
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return Load<SyndicationItem> (reader);
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}
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public static TSyndicationItem Load<TSyndicationItem> (XmlReader reader) where TSyndicationItem : SyndicationItem, new()
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{
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return SyndicationVersions.LoadItem<TSyndicationItem> (reader);
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}
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SyndicationExtensions extensions = new SyndicationExtensions ();
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Collection<SyndicationCategory> categories;
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Collection<SyndicationPerson> authors, contributors;
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Collection<SyndicationLink> links;
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Uri base_uri;
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TextSyndicationContent copyright, summary, title;
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SyndicationContent content;
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string id;
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DateTimeOffset last_updated_time, published_date;
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SyndicationFeed source_feed;
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public SyndicationItem ()
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{
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}
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public SyndicationItem (string title, string content, Uri feedAlternateLink)
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: this (title, content, feedAlternateLink, null, default (DateTimeOffset))
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{
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}
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public SyndicationItem (string title, string content, Uri feedAlternateLink, string id,
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DateTimeOffset lastUpdatedTime)
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: this (title, content != null ? SyndicationContent.CreatePlaintextContent (content) : null, feedAlternateLink, id, lastUpdatedTime)
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{
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}
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public SyndicationItem (string title, SyndicationContent content, Uri feedAlternateLink, string id,
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DateTimeOffset lastUpdatedTime)
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{
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Title = title != null ? new TextSyndicationContent (title) : null;
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Content = content;
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if (feedAlternateLink != null)
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AddPermalink (feedAlternateLink);
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Id = id;
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LastUpdatedTime = lastUpdatedTime;
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}
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protected SyndicationItem (SyndicationItem source)
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{
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extensions = source.extensions.Clone ();
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categories = Copy<SyndicationCategory> (source.categories);
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authors = Copy<SyndicationPerson> (source.authors);
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contributors = Copy<SyndicationPerson> (source.contributors);
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links = Copy<SyndicationLink> (source.links);
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base_uri = source.base_uri; // copy by reference !!
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copyright = source.copyright == null ? null : source.copyright.Clone () as TextSyndicationContent;
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summary = source.summary == null ? null : source.summary.Clone () as TextSyndicationContent;
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title = source.title == null ? null : source.title.Clone () as TextSyndicationContent;
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content = source.content == null ? null : source.content.Clone ();
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id = source.id;
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last_updated_time = source.last_updated_time;
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published_date = source.published_date;
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source_feed = source.source_feed == null ? null : source.source_feed.Clone (false);
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}
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Collection<T> Copy<T> (Collection<T> source)
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{
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if (source == null)
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return source;
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Collection<T> ret = new Collection<T> ();
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foreach (object item in source)
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ret.Add ((T) CreateCopy (item));
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return ret;
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}
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object CreateCopy (object source)
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{
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if (source == null)
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return null;
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if (source is SyndicationPerson)
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return ((SyndicationPerson) source).Clone ();
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if (source is SyndicationLink)
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return ((SyndicationLink) source).Clone ();
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if (source is SyndicationCategory)
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return ((SyndicationCategory) source).Clone ();
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throw new InvalidOperationException ();
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}
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public Dictionary<XmlQualifiedName, string> AttributeExtensions {
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get { return extensions.Attributes; }
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}
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public SyndicationElementExtensionCollection ElementExtensions {
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get { return extensions.Elements; }
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}
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public Collection<SyndicationPerson> Authors {
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get {
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if (authors == null)
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authors = new Collection<SyndicationPerson> ();
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return authors;
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}
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}
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public Collection<SyndicationCategory> Categories {
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get {
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if (categories == null)
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categories = new Collection<SyndicationCategory> ();
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return categories;
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}
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}
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public Collection<SyndicationPerson> Contributors {
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get {
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if (contributors == null)
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contributors = new Collection<SyndicationPerson> ();
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return contributors;
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}
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}
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public Collection<SyndicationLink> Links {
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get {
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if (links == null)
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links = new Collection<SyndicationLink> ();
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return links;
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}
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}
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public Uri BaseUri {
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get { return base_uri; }
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set { base_uri = value; }
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}
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public TextSyndicationContent Copyright {
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get { return copyright; }
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set { copyright = value; }
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}
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public SyndicationContent Content {
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get { return content; }
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set { content = value; }
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}
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public string Id {
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get { return id; }
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set { id = value; }
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}
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public DateTimeOffset LastUpdatedTime {
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get { return last_updated_time; }
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set { last_updated_time = value; }
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}
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public DateTimeOffset PublishDate {
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get { return published_date; }
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set { published_date = value; }
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}
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public SyndicationFeed SourceFeed {
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get { return source_feed; }
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set { source_feed = value; }
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}
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public TextSyndicationContent Summary {
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get { return summary; }
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set { summary = value; }
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}
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public TextSyndicationContent Title {
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get { return title; }
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set { title = value; }
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}
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public void AddPermalink (Uri link)
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{
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if (link == null)
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throw new ArgumentNullException ("link");
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Links.Add (SyndicationLink.CreateAlternateLink (link));
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}
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public virtual SyndicationItem Clone ()
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{
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return new SyndicationItem (this);
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}
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protected internal virtual SyndicationCategory CreateCategory ()
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{
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return new SyndicationCategory ();
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}
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protected internal virtual SyndicationLink CreateLink ()
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{
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return new SyndicationLink ();
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}
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protected internal virtual SyndicationPerson CreatePerson ()
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{
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return new SyndicationPerson ();
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}
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public Atom10ItemFormatter GetAtom10Formatter ()
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{
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return new Atom10ItemFormatter (this);
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}
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public Rss20ItemFormatter GetRss20Formatter ()
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{
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return GetRss20Formatter (true);
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}
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public Rss20ItemFormatter GetRss20Formatter (bool serializeExtensionsAsAtom)
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{
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return new Rss20ItemFormatter (this, serializeExtensionsAsAtom);
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}
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public void SaveAsAtom10 (XmlWriter writer)
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{
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if (writer == null)
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throw new ArgumentNullException ("writer");
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GetAtom10Formatter ().WriteTo (writer);
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}
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public void SaveAsRss20 (XmlWriter writer)
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{
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if (writer == null)
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throw new ArgumentNullException ("writer");
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GetRss20Formatter ().WriteTo (writer);
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}
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protected internal virtual bool TryParseContent (XmlReader reader, string contentType, string version, out SyndicationContent content)
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{
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content = null;
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return false;
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}
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protected internal virtual bool TryParseAttribute (string name, string ns, string value, string version)
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{
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return false;
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}
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protected internal virtual bool TryParseElement (XmlReader reader, string version)
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{
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return false;
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}
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protected internal virtual void WriteAttributeExtensions (XmlWriter writer, string version)
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{
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extensions.WriteAttributeExtensions (writer, version);
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}
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protected internal virtual void WriteElementExtensions (XmlWriter writer, string version)
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{
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extensions.WriteElementExtensions (writer, version);
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}
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}
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}
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