C# Client.AtomFeedParser类代码示例

       //////////////////////////////////////////////////////////////////////
        /// <summary>parses the inner state of the element</summary>
        /// <param name="e">the Event arguments</param>
        /// <param name="parser">the atomFeedParser that called this</param>
        //////////////////////////////////////////////////////////////////////
        public override void Parse(ExtensionElementEventArgs e, AtomFeedParser parser)
        {
            XmlNode eventNode = e.ExtensionElement;

            Tracing.TraceMsg(eventNode.LocalName);
            // Ensure that the namespace is correct.
            if (String.Compare(eventNode.NamespaceURI,
                GCodeSearchParserNameTable.CSNamespace, true) == 0)
            {
                // Parse a File Element
                if (eventNode.LocalName == GCodeSearchParserNameTable.EVENT_FILE)
                {
                    file = File.ParseFile(eventNode, parser);
                    e.DiscardEntry = true;
                }
                    // Parse a Package Element
                else if ((eventNode.LocalName == GCodeSearchParserNameTable.EVENT_PACKAGE))
                {
                    package = Package.ParsePackage(eventNode, parser);
                    e.DiscardEntry = true;
                }
                    // Parse Match Elements 
                else if (eventNode.LocalName == GCodeSearchParserNameTable.EVENT_MATCH)
                {
                    matches.Add(Match.ParseMatch(eventNode, parser));
                    e.DiscardEntry = true;
                } 
            }
        }

        //////////////////////////////////////////////////////////////////////
        /// <summary>Parses an xml node to create a GsaExtension object.</summary> 
        /// <param name="node">the node to parse node</param>
        /// <param name="parser">the xml parser to use if we need to dive deeper</param>
        /// <returns>the created GsaExtension object</returns>
        //////////////////////////////////////////////////////////////////////
        public IExtensionElementFactory CreateInstance(XmlNode node, AtomFeedParser parser)
        {
            Tracing.TraceCall();
            GsaExtension gsa = null;

            if (node != null)
            {
                object localname = node.LocalName;
                if (localname.Equals(this.XmlName) == false ||
                  node.NamespaceURI.Equals(this.XmlNameSpace) == false)
                {
                    return null;
                }
            }

            gsa = new GsaExtension();
            
            if (node != null)
            {
                if (node.Attributes == null || node.Attributes[PropertyName] == null)
                {
                    throw new ArgumentException("GsaContent name can not found in this name space");
                }
                gsa.ContentName = node.Attributes[PropertyName].Value;
                gsa.ContentValue = node.InnerText == null ? "" : node.InnerText;
            }
            return gsa;
        }

        //////////////////////////////////////////////////////////////////////
        /// <summary>Parses an xml node to create a File object.</summary> 
        /// <param name="node">File node</param>
        /// <param name="parser">AtomFeedParser to use</param>
        /// <returns>the created File object</returns>
        //////////////////////////////////////////////////////////////////////
        public static File ParseFile(XmlNode node, AtomFeedParser parser)
        {
            Tracing.TraceCall();
            File file = null;
            Tracing.Assert(node != null, "node should not be null");
            if (node == null)
            {
                throw new ArgumentNullException("node");
            }

            // Ensure that the namespace is correct.
            if (String.Compare(node.NamespaceURI,
                GCodeSearchParserNameTable.CSNamespace, true) == 0)
            {
                file = new File();
                if (node.Attributes != null)
                {
                    file.filename =
                        node.Attributes[
                        GCodeSearchParserNameTable.ATTRIBUTE_NAME].Value;
                }
                else 
                {
                    throw new ArgumentNullException(
                        BaseNameTable.gBatchNamespace +
                        ":" + GCodeSearchParserNameTable.EVENT_FILE + " must contain exactly one "
                        + GCodeSearchParserNameTable.ATTRIBUTE_NAME + " attribute");
                }
            }
            return file;
        }

        //////////////////////////////////////////////////////////////////////
        /// <summary>Parses an xml node to create a Where  object.</summary> 
        /// <param name="node">the node to parse node</param>
        /// <param name="parser">the xml parser to use if we need to dive deeper</param>
        /// <returns>the created Where  object</returns>
        //////////////////////////////////////////////////////////////////////
        public IExtensionElementFactory CreateInstance(XmlNode node, AtomFeedParser parser)
        {
            Tracing.TraceCall();
            RecurrenceException exception  = null;

            if (node != null)
            {
                object localname = node.LocalName;
                if (localname.Equals(this.XmlName) == false ||
                  node.NamespaceURI.Equals(this.XmlNameSpace) == false)
                {
                    return null;
                }
            }

            exception = new RecurrenceException(); 

            if (node != null)
            {
                if (node.Attributes != null)
                {
                    if (node.Attributes[GDataParserNameTable.XmlAttributeSpecialized] != null)
                    {
                        exception.Specialized = bool.Parse(node.Attributes[GDataParserNameTable.XmlAttributeSpecialized].Value); 
                    }
                }

                if (node.HasChildNodes)
                {
                    XmlNode childNode = node.FirstChild;
                    while (childNode != null && childNode is XmlElement)
                    {
                        if (childNode.LocalName == GDataParserNameTable.XmlEntryLinkElement)
                        {
                            exception.EntryLink = EntryLink.ParseEntryLink(childNode, parser); 
                        }
                        childNode = childNode.NextSibling;
                    }
                }
                if (exception.EntryLink == null)
                {
                    throw new ArgumentException("g:recurringException/entryLink is required.");
                }
            }

            return exception; 
        }

        /// <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)
        {
            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;
                }
            }
            return;
        }

        /// <summary>
        /// this is the subclassing method for AtomBase derived 
        /// classes to overload what childelements should be created
        /// needed to create CustomLink type objects, like WebContentLink etc
        /// </summary>
        /// <param name="reader">The XmlReader that tells us what we are working with</param>
        /// <param name="parser">the parser is primarily used for nametable comparisons</param>
        /// <returns>AtomBase</returns>
        public override AtomBase CreateAtomSubElement(XmlReader reader, AtomFeedParser parser)
        {
            if (reader == null)
            {
                throw new ArgumentNullException("reader");
            }
            if (parser == null)
            {
                throw new ArgumentNullException("parser");
            }

            Object localname = reader.LocalName;
            if (localname.Equals(parser.Nametable.Category))
            {
                return new YouTubeCategory();
            }
            return base.CreateAtomSubElement(reader, parser);
        }

        //////////////////////////////////////////////////////////////////////
        /// <summary>parses an xml node to create a Recurrence object</summary> 
        /// <param name="node">Recurrence node</param>
        /// <param name="parser">AtomFeedParser to use</param>
        /// <returns> the created Recurrence object</returns>
        //////////////////////////////////////////////////////////////////////
        public static RecurrenceException ParseRecurrenceException(XmlNode node, AtomFeedParser parser)
        {
            Tracing.TraceCall();
            RecurrenceException exception  = null;

            Tracing.Assert(node != null, "node should not be null");

            if (node == null)
            {
                throw new ArgumentNullException("node");
            }

            object localname = node.LocalName;
            if (localname.Equals(GDataParserNameTable.XmlRecurrenceExceptionElement))
            {
                exception = new RecurrenceException(); 
                if (node.Attributes != null)
                {
                    if (node.Attributes[GDataParserNameTable.XmlAttributeSpecialized] != null)
                    {
                        exception.Specialized = bool.Parse(node.Attributes[GDataParserNameTable.XmlAttributeSpecialized].Value); 
                    }
                }

                if (node.HasChildNodes)
                {
                    XmlNode childNode = node.FirstChild;
                    while (childNode != null && childNode is XmlElement)
                    {
                        if (childNode.LocalName == GDataParserNameTable.XmlEntryLinkElement)
                        {
                            exception.EntryLink = EntryLink.ParseEntryLink(childNode, parser); 
                        }
                        childNode = childNode.NextSibling;
                    }
                }
            }

            if (exception.EntryLink == null)
            {
                throw new ArgumentException("g:recurringException/entryLink is required.");
            }
            return exception; 
        }

        //////////////////////////////////////////////////////////////////////
        /// <summary>Parses an xml node to create a Where  object.</summary> 
        /// <param name="node">the node to parse node</param>
        /// <param name="parser">the xml parser to use if we need to dive deeper</param>
        /// <returns>the created Where  object</returns>
        //////////////////////////////////////////////////////////////////////
        public IExtensionElementFactory CreateInstance(XmlNode node, AtomFeedParser parser)
        {
            Tracing.TraceCall();
            Comments comments = null;

            if (node != null)
            {
                object localname = node.LocalName;
                if (!localname.Equals(this.XmlName) ||
                    !node.NamespaceURI.Equals(this.XmlNameSpace))
                {
                    return null;
                }
            }

            comments = new Comments();

            if (node != null)
            {
                if (node.HasChildNodes)
                {
                    XmlNode commentsChild = node.FirstChild;
                    while (commentsChild != null && commentsChild is XmlElement)
                    {
                        if (commentsChild.LocalName == GDataParserNameTable.XmlFeedLinkElement &&
                            commentsChild.NamespaceURI == BaseNameTable.gNamespace)
                        {
                            if (comments.FeedLink == null)
                            {
                                comments.FeedLink = FeedLink.ParseFeedLink(commentsChild);
                            }
                            else
                            {
                                throw new ArgumentException("Only one feedLink is allowed inside the gd:comments");
                            }
                        }
                        commentsChild = commentsChild.NextSibling;
                    }
                }

            }
            return comments; 
        }

        //////////////////////////////////////////////////////////////////////
        /// <summary>Parses an xml node to create a Package object.</summary> 
        /// <param name="node">Package node</param>
        /// <param name="parser">AtomFeedParser to use</param>
        /// <returns>the created Package object</returns>
        //////////////////////////////////////////////////////////////////////
        public static Package ParsePackage(XmlNode node, AtomFeedParser parser)
        {
            Tracing.TraceCall();
            Package package = null;
            Tracing.Assert(node != null, "node should not be null");
            if (node == null)
            {
                throw new ArgumentNullException("node");
            }

            object localname = node.LocalName;
            // Ensure that the namespace is correct.
            if (String.Compare(node.NamespaceURI,
                GCodeSearchParserNameTable.CSNamespace, true) == 0)
            {
                if (localname.Equals(GCodeSearchParserNameTable.EVENT_PACKAGE))
                {
                    package = new Package();
                    if (node.Attributes != null)
                    {
                        package.name =
                            node.Attributes[
                            GCodeSearchParserNameTable.ATTRIBUTE_NAME].Value;
                        package.uri =
                            node.Attributes[
                            GCodeSearchParserNameTable.ATTRIBUTE_URI].Value;
                    }
                    else 
                    {
                        throw new ArgumentNullException(
                            BaseNameTable.gBatchNamespace +
                            ":" + GCodeSearchParserNameTable.EVENT_PACKAGE +
                            " must contain the attributes " +
                            GCodeSearchParserNameTable.ATTRIBUTE_NAME + " and " +
                            GCodeSearchParserNameTable.ATTRIBUTE_URI);
                    }
                }
            }
            return package;
        }

        //////////////////////////////////////////////////////////////////////
        /// <summary>Parses an xml node to create a Reminder object.</summary> 
        /// <param name="node">the node to parse node</param>
        /// <param name="parser">the xml parser to use if we need to dive deeper</param>
        /// <returns>the created Reminder object</returns>
        //////////////////////////////////////////////////////////////////////
        public IExtensionElementFactory CreateInstance(XmlNode node, AtomFeedParser parser)
        {
            Tracing.TraceCall();
            if (node != null)
            {
                object localname = node.LocalName;
                if (!localname.Equals(this.XmlName) ||
                    !node.NamespaceURI.Equals(this.XmlNameSpace))
                {
                    return null;
                }
            }

            Recurrence recurrence = new Recurrence();

            if (node != null)
            {
                recurrence.Value = node.InnerText.Trim();
            }

            return recurrence;
        }

        //////////////////////////////////////////////////////////////////////
        /// <summary>Parses an xml node to create a Reminder object.</summary> 
        /// <param name="node">the node to parse node</param>
        /// <param name="parser">the xml parser to use if we need to dive deeper</param>
        /// <returns>the created Reminder object</returns>
        //////////////////////////////////////////////////////////////////////
        public IExtensionElementFactory CreateInstance(XmlNode node, AtomFeedParser parser)
        {
            Tracing.TraceCall();
            Reminder reminder = null;
          
            if (node != null)
            {
                object localname = node.LocalName;
                if (localname.Equals(this.XmlName) == false ||
                    node.NamespaceURI.Equals(this.XmlNameSpace) == false)
                {
                    return null;
                }
            }

            reminder = new Reminder();
            if (node != null && node.Attributes != null)
            {
                if (node.Attributes[GDataParserNameTable.XmlAttributeAbsoluteTime] != null)
                {
                    try
                    {
                        reminder.AbsoluteTime =
                        DateTime.Parse(node.Attributes[GDataParserNameTable.XmlAttributeAbsoluteTime].Value);
                    }
                    catch (FormatException fe)
                    {
                        throw new ArgumentException("Invalid g:reminder/@absoluteTime.", fe);
                    }
                }

                if (node.Attributes[GDataParserNameTable.XmlAttributeDays] != null)
                {
                    try
                    {
                        reminder.Days = Int32.Parse(node.Attributes[GDataParserNameTable.XmlAttributeDays].Value);
                    }
                    catch (FormatException fe)
                    {
                        throw new ArgumentException("Invalid g:reminder/@days.", fe);
                    }
                }

                if (node.Attributes[GDataParserNameTable.XmlAttributeHours] != null)
                {
                    try
                    {
                        reminder.Hours = Int32.Parse(node.Attributes[GDataParserNameTable.XmlAttributeHours].Value);
                    }
                    catch (FormatException fe)
                    {
                        throw new ArgumentException("Invalid g:reminder/@hours.", fe);
                    }
                }

                if (node.Attributes[GDataParserNameTable.XmlAttributeMinutes] != null)
                {
                    try
                    {
                        reminder.Minutes = Int32.Parse(node.Attributes[GDataParserNameTable.XmlAttributeMinutes].Value);
                    }
                    catch (FormatException fe)
                    {
                        throw new ArgumentException("Invalid g:reminder/@minutes.", fe);
                    }
                }

                if (node.Attributes[GDataParserNameTable.XmlAttributeMethod] != null)
                {
                    try
                    {
                        reminder.Method = (ReminderMethod)Enum.Parse(typeof(ReminderMethod), 
                                                                     node.Attributes[GDataParserNameTable.XmlAttributeMethod].Value,
                                                                     true);
                    }
                    catch (Exception e)
                    {
                        throw new ArgumentException("Invalid g:reminder/@method.", e);
                    }
                }
            }
            return reminder;
        }

 //////////////////////////////////////////////////////////////////////
 /// <summary>Parses an xml node to create a Where  object.</summary> 
 /// <param name="node">the node to parse node</param>
 /// <param name="parser">the xml parser to use if we need to dive deeper</param>
 /// <returns>the created Where  object</returns>
 //////////////////////////////////////////////////////////////////////
 public IExtensionElementFactory CreateInstance(XmlNode node, AtomFeedParser parser)
 {
     return FeedLink.ParseFeedLink(node);
 }

        // end of accessor public ArrayList Extensions


        //////////////////////////////////////////////////////////////////////
        /// <summary>Parses an xml node to create a Who object.</summary> 
        /// <param name="node">the node to work on, can be NULL</param>
        /// <param name="parser">the xml parser to use if we need to dive deeper</param>
        /// <returns>the created SimpleElement object</returns>
        //////////////////////////////////////////////////////////////////////
        public override IExtensionElement CreateInstance(XmlNode node, AtomFeedParser parser) 
        {
            Tracing.TraceCall("for: " + XmlName);

            if (node != null)
            {
                object localname = node.LocalName;
                if (localname.Equals(this.XmlName) == false ||
                    node.NamespaceURI.Equals(this.XmlNameSpace) == false)
                {
                    return null;
                }
            }

            SimpleContainer sc = null;            
            // create a new container
            sc = this.MemberwiseClone() as SimpleContainer;
      
            if (node != null && node.HasChildNodes)
            {
                XmlNode childNode = node.FirstChild;
                while (childNode != null && childNode is XmlElement)
                {
                    foreach (IExtensionElementFactory f in this.ExtensionFactories)
                    {
                        if (String.Compare(childNode.NamespaceURI, f.XmlNameSpace) == 0)
                        {
                            if (String.Compare(childNode.LocalName, f.XmlName) == 0)
                            {
                                Tracing.TraceMsg("Added extension to SimpleContainer for: " + f.XmlName);
                                sc.ExtensionElements.Add(f.CreateInstance(childNode, parser));
                                break;
                            }
                        }
                    }
                    childNode = childNode.NextSibling;
                }
                if (node.Attributes != null)
                {
                    sc.ProcessAttributes(node);
                }
            }
            return sc;
        }

 /// <summary>
 /// creates a new GDataBatchEntryData
 /// </summary>
 /// <param name="node"></param>
 /// <param name="parser"></param>
 /// <returns></returns>
 public IExtensionElementFactory CreateInstance(XmlNode node, AtomFeedParser parser) {
     //we really don't know how to create an instance of ourself.
     throw new Exception("The method or operation is not implemented.");
 }

 /// <summary>
 /// Is called after we already handled the custom entry, to handle all 
 /// other potential parsing tasks
 /// </summary>
 /// <param name="e"></param>
 /// <param name="parser">the atom feed parser used</param>
 protected override void HandleExtensionElements(ExtensionElementEventArgs e,
     AtomFeedParser parser) {
     base.HandleExtensionElements(e, parser);
 }