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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Syndication
{
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Text;
using System.Xml;
using System.Xml.Serialization;
using System.Diagnostics.CodeAnalysis;
using System.Xml.Schema;
using System.Runtime.CompilerServices;
[TypeForwardedFrom("System.ServiceModel.Web, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35")]
[XmlRoot(ElementName = Rss20Constants.ItemTag, Namespace = Rss20Constants.Rss20Namespace)]
public class Rss20ItemFormatter : SyndicationItemFormatter, IXmlSerializable
{
Rss20FeedFormatter feedSerializer;
Type itemType;
bool preserveAttributeExtensions;
bool preserveElementExtensions;
bool serializeExtensionsAsAtom;
public Rss20ItemFormatter()
: this(typeof(SyndicationItem))
{
}
public Rss20ItemFormatter(Type itemTypeToCreate)
: base()
{
if (itemTypeToCreate == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("itemTypeToCreate");
}
if (!typeof(SyndicationItem).IsAssignableFrom(itemTypeToCreate))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("itemTypeToCreate",
SR.GetString(SR.InvalidObjectTypePassed, "itemTypeToCreate", "SyndicationItem"));
}
this.feedSerializer = new Rss20FeedFormatter();
this.feedSerializer.PreserveAttributeExtensions = this.preserveAttributeExtensions = true;
this.feedSerializer.PreserveElementExtensions = this.preserveElementExtensions = true;
this.feedSerializer.SerializeExtensionsAsAtom = this.serializeExtensionsAsAtom = true;
this.itemType = itemTypeToCreate;
}
public Rss20ItemFormatter(SyndicationItem itemToWrite)
: this(itemToWrite, true)
{
}
public Rss20ItemFormatter(SyndicationItem itemToWrite, bool serializeExtensionsAsAtom)
: base(itemToWrite)
{
// No need to check that the parameter passed is valid - it is checked by the c'tor of the base class
this.feedSerializer = new Rss20FeedFormatter();
this.feedSerializer.PreserveAttributeExtensions = this.preserveAttributeExtensions = true;
this.feedSerializer.PreserveElementExtensions = this.preserveElementExtensions = true;
this.feedSerializer.SerializeExtensionsAsAtom = this.serializeExtensionsAsAtom = serializeExtensionsAsAtom;
this.itemType = itemToWrite.GetType();
}
public bool PreserveAttributeExtensions
{
get { return this.preserveAttributeExtensions; }
set
{
this.preserveAttributeExtensions = value;
this.feedSerializer.PreserveAttributeExtensions = value;
}
}
public bool PreserveElementExtensions
{
get { return this.preserveElementExtensions; }
set
{
this.preserveElementExtensions = value;
this.feedSerializer.PreserveElementExtensions = value;
}
}
public bool SerializeExtensionsAsAtom
{
get { return this.serializeExtensionsAsAtom; }
set
{
this.serializeExtensionsAsAtom = value;
this.feedSerializer.SerializeExtensionsAsAtom = value;
}
}
public override string Version
{
get { return SyndicationVersions.Rss20; }
}
protected Type ItemType
{
get
{
return this.itemType;
}
}
public override bool CanRead(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
return reader.IsStartElement(Rss20Constants.ItemTag, Rss20Constants.Rss20Namespace);
}
[SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes", Justification = "The IXmlSerializable implementation is only for exposing under WCF DataContractSerializer. The funcionality is exposed to derived class through the ReadFrom\\WriteTo methods")]
XmlSchema IXmlSerializable.GetSchema()
{
return null;
}
[SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes", Justification = "The IXmlSerializable implementation is only for exposing under WCF DataContractSerializer. The funcionality is exposed to derived class through the ReadFrom\\WriteTo methods")]
void IXmlSerializable.ReadXml(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
SyndicationFeedFormatter.TraceItemReadBegin();
ReadItem(reader);
SyndicationFeedFormatter.TraceItemReadEnd();
}
[SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes", Justification = "The IXmlSerializable implementation is only for exposing under WCF DataContractSerializer. The funcionality is exposed to derived class through the ReadFrom\\WriteTo methods")]
void IXmlSerializable.WriteXml(XmlWriter writer)
{
if (writer == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writer");
}
SyndicationFeedFormatter.TraceItemWriteBegin();
WriteItem(writer);
SyndicationFeedFormatter.TraceItemWriteEnd();
}
public override void ReadFrom(XmlReader reader)
{
SyndicationFeedFormatter.TraceItemReadBegin();
if (!CanRead(reader))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException(SR.GetString(SR.UnknownItemXml, reader.LocalName, reader.NamespaceURI)));
}
ReadItem(reader);
SyndicationFeedFormatter.TraceItemReadEnd();
}
public override void WriteTo(XmlWriter writer)
{
if (writer == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writer");
}
SyndicationFeedFormatter.TraceItemWriteBegin();
writer.WriteStartElement(Rss20Constants.ItemTag, Rss20Constants.Rss20Namespace);
WriteItem(writer);
writer.WriteEndElement();
SyndicationFeedFormatter.TraceItemWriteEnd();
}
protected override SyndicationItem CreateItemInstance()
{
return SyndicationItemFormatter.CreateItemInstance(this.itemType);
}
void ReadItem(XmlReader reader)
{
SetItem(CreateItemInstance());
feedSerializer.ReadItemFrom(XmlDictionaryReader.CreateDictionaryReader(reader), this.Item);
}
void WriteItem(XmlWriter writer)
{
if (this.Item == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ItemFormatterDoesNotHaveItem)));
}
XmlDictionaryWriter w = XmlDictionaryWriter.CreateDictionaryWriter(writer);
feedSerializer.WriteItemContents(w, this.Item);
}
}
[TypeForwardedFrom("System.ServiceModel.Web, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35")]
[XmlRoot(ElementName = Rss20Constants.ItemTag, Namespace = Rss20Constants.Rss20Namespace)]
public class Rss20ItemFormatter<TSyndicationItem> : Rss20ItemFormatter, IXmlSerializable
where TSyndicationItem : SyndicationItem, new ()
{
public Rss20ItemFormatter()
: base(typeof(TSyndicationItem))
{
}
public Rss20ItemFormatter(TSyndicationItem itemToWrite)
: base(itemToWrite)
{
}
public Rss20ItemFormatter(TSyndicationItem itemToWrite, bool serializeExtensionsAsAtom)
: base(itemToWrite, serializeExtensionsAsAtom)
{
}
protected override SyndicationItem CreateItemInstance()
{
return new TSyndicationItem();
}
}
}
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