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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Syndication
{
using System.Runtime;
using System.Runtime.Serialization;
using System.Xml;
using System.Xml.Serialization;
using System.Runtime.CompilerServices;
// NOTE: This class implements Clone so if you add any members, please update the copy ctor
[TypeForwardedFrom("System.ServiceModel.Web, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35")]
public class XmlSyndicationContent : SyndicationContent
{
XmlBuffer contentBuffer;
SyndicationElementExtension extension;
string type;
// Saves the element in the reader to the buffer (attributes preserved)
// Type is populated from type attribute on reader
// Reader must be positioned at an element
public XmlSyndicationContent(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
SyndicationFeedFormatter.MoveToStartElement(reader);
if (reader.HasAttributes)
{
while (reader.MoveToNextAttribute())
{
string name = reader.LocalName;
string ns = reader.NamespaceURI;
string value = reader.Value;
if (name == Atom10Constants.TypeTag && ns == string.Empty)
{
this.type = value;
}
else if (!FeedUtils.IsXmlns(name, ns))
{
base.AttributeExtensions.Add(new XmlQualifiedName(name, ns), value);
}
}
reader.MoveToElement();
}
this.type = string.IsNullOrEmpty(this.type) ? Atom10Constants.XmlMediaType : this.type;
this.contentBuffer = new XmlBuffer(int.MaxValue);
using (XmlDictionaryWriter writer = this.contentBuffer.OpenSection(XmlDictionaryReaderQuotas.Max))
{
writer.WriteNode(reader, false);
}
contentBuffer.CloseSection();
contentBuffer.Close();
}
public XmlSyndicationContent(string type, object dataContractExtension, XmlObjectSerializer dataContractSerializer)
{
this.type = string.IsNullOrEmpty(type) ? Atom10Constants.XmlMediaType : type;
this.extension = new SyndicationElementExtension(dataContractExtension, dataContractSerializer);
}
public XmlSyndicationContent(string type, object xmlSerializerExtension, XmlSerializer serializer)
{
this.type = string.IsNullOrEmpty(type) ? Atom10Constants.XmlMediaType : type;
this.extension = new SyndicationElementExtension(xmlSerializerExtension, serializer);
}
public XmlSyndicationContent(string type, SyndicationElementExtension extension)
{
if (extension == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("extension");
}
this.type = string.IsNullOrEmpty(type) ? Atom10Constants.XmlMediaType : type;
this.extension = extension;
}
protected XmlSyndicationContent(XmlSyndicationContent source)
: base(source)
{
if (source == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("source");
}
this.contentBuffer = source.contentBuffer;
this.extension = source.extension;
this.type = source.type;
}
public SyndicationElementExtension Extension
{
get
{
return this.extension;
}
}
public override string Type
{
get { return this.type; }
}
public override SyndicationContent Clone()
{
return new XmlSyndicationContent(this);
}
public XmlDictionaryReader GetReaderAtContent()
{
EnsureContentBuffer();
return this.contentBuffer.GetReader(0);
}
public TContent ReadContent<TContent>()
{
return ReadContent<TContent>((DataContractSerializer) null);
}
public TContent ReadContent<TContent>(XmlObjectSerializer dataContractSerializer)
{
if (dataContractSerializer == null)
{
dataContractSerializer = new DataContractSerializer(typeof(TContent));
}
if (this.extension != null)
{
return this.extension.GetObject<TContent>(dataContractSerializer);
}
else
{
Fx.Assert(this.contentBuffer != null, "contentBuffer cannot be null");
using (XmlDictionaryReader reader = this.contentBuffer.GetReader(0))
{
// skip past the content element
reader.ReadStartElement();
return (TContent) dataContractSerializer.ReadObject(reader, false);
}
}
}
public TContent ReadContent<TContent>(XmlSerializer serializer)
{
if (serializer == null)
{
serializer = new XmlSerializer(typeof(TContent));
}
if (this.extension != null)
{
return this.extension.GetObject<TContent>(serializer);
}
else
{
Fx.Assert(this.contentBuffer != null, "contentBuffer cannot be null");
using (XmlDictionaryReader reader = this.contentBuffer.GetReader(0))
{
// skip past the content element
reader.ReadStartElement();
return (TContent) serializer.Deserialize(reader);
}
}
}
// does not write start element or type attribute, writes other attributes and rest of content
protected override void WriteContentsTo(XmlWriter writer)
{
if (writer == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writer");
}
if (this.extension != null)
{
this.extension.WriteTo(writer);
}
else if (this.contentBuffer != null)
{
using (XmlDictionaryReader reader = this.contentBuffer.GetReader(0))
{
reader.MoveToStartElement();
if (!reader.IsEmptyElement)
{
reader.ReadStartElement();
while (reader.Depth >= 1 && reader.ReadState == ReadState.Interactive)
{
writer.WriteNode(reader, false);
}
}
}
}
}
void EnsureContentBuffer()
{
if (this.contentBuffer == null)
{
XmlBuffer tmp = new XmlBuffer(int.MaxValue);
using (XmlDictionaryWriter writer = tmp.OpenSection(XmlDictionaryReaderQuotas.Max))
{
this.WriteTo(writer, Atom10Constants.ContentTag, Atom10Constants.Atom10Namespace);
}
tmp.CloseSection();
tmp.Close();
this.contentBuffer = tmp;
}
}
}
}
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