/// <summary>nifty loop to check for base attributes for an object</summary>
/// <param name="reader">correctly positioned xmlreader</param>
/// <param name="baseObject">the base object to set the property on</param>
protected void ParseBasicAttributes(XmlReader reader, AtomBase baseObject)
{
Tracing.TraceCall();
Tracing.Assert(reader != null, "reader should not be null");
if (reader == null)
{
throw new ArgumentNullException("reader");
}
Tracing.Assert(baseObject != null, "baseObject should not be null");
if (baseObject == null)
{
throw new ArgumentNullException("baseObject");
}
if (reader.NodeType == XmlNodeType.Element && reader.HasAttributes)
{
while (reader.MoveToNextAttribute())
{
ParseBaseAttributes(reader, baseObject);
}
// position back to the element
reader.MoveToElement();
}
}
/// <summary>parses extension elements, needs to happen when known attributes are done</summary>
/// <param name="reader">correctly positioned xmlreader</param>
/// <param name="baseObject">the base object to set the property on</param>
protected void ParseExtensionElements(XmlReader reader, AtomBase baseObject)
{
Tracing.TraceCall();
if (reader == null)
{
throw new System.ArgumentNullException("reader", "No XmlReader supplied");
}
if (baseObject == null)
{
throw new System.ArgumentNullException("baseObject", "No baseObject supplied");
}
if (IsCurrentNameSpace(reader, BaseNameTable.NSAtom))
{
Tracing.TraceInfo("Found an unknown ATOM element = this might be a bug, either in the code or the document");
Tracing.TraceInfo("element: " + reader.LocalName + " position: " + reader.NodeType.ToString());
// maybe we should throw here, but I rather not - makes parsing more flexible
}
else
{
// everything NOT in Atom, call it
Tracing.TraceInfo("Found an unknown element");
this.OnNewExtensionElement(reader, baseObject);
// position back to the element
reader.MoveToElement();
}
}
/// <summary>Walker action. Just gets a property.</summary>
/// <param name="atom">object to set the property on</param>
/// <returns>the value of the dirty flag</returns>
public bool Go(AtomBase atom)
{
Tracing.Assert(atom != null, "atom should not be null");
if (atom == null)
{
throw new ArgumentNullException("atom");
}
return(atom.Dirty);
}
/// <summary>Walker action. Just sets a property.</summary>
/// <param name="atom">object to set the property on </param>
/// <returns> always false, indicating to walk the whole tree</returns>
public bool Go(AtomBase atom)
{
Tracing.Assert(atom != null, "atom should not be null");
if (atom == null)
{
throw new ArgumentNullException("atom");
}
atom.SetVersionInfo(v);
return(false);
}
/// <summary>parses an xml stream to create an AtomCategory object</summary>
/// <param name="reader">correctly positioned xmlreader</param>
/// <param name="owner">the object containing the person</param>
/// <returns> the created AtomCategory object</returns>
protected AtomCategory ParseCategory(XmlReader reader, AtomBase owner)
{
Tracing.TraceCall();
Tracing.Assert(reader != null, "reader should not be null");
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (owner == null)
{
throw new ArgumentNullException("owner");
}
AtomCategory category = owner.CreateAtomSubElement(reader, this) as AtomCategory;
if (category != null)
{
bool noChildren = reader.IsEmptyElement;
if (reader.HasAttributes)
{
while (reader.MoveToNextAttribute())
{
object localname = reader.LocalName;
if (localname.Equals(this.nameTable.Term))
{
category.Term = Utilities.DecodedValue(reader.Value);
}
else if (localname.Equals(this.nameTable.Scheme))
{
category.Scheme = new AtomUri(reader.Value);
}
else if (localname.Equals(this.nameTable.Label))
{
category.Label = Utilities.DecodedValue(reader.Value);
}
else
{
ParseBaseAttributes(reader, category);
}
}
}
if (!noChildren)
{
reader.MoveToElement();
int lvl = -1;
while (NextChildElement(reader, ref lvl))
{
ParseExtensionElements(reader, category);
}
}
}
return(category);
}
/// <summary>Walker action. Just gets a property.</summary>
/// <param name="atom">object to set the property on </param>
/// <returns>returns the value of the ShouldBePersisted() of the object</returns>
public bool Go(AtomBase atom)
{
Tracing.Assert(atom != null, "atom should not be null");
if (atom == null)
{
throw new ArgumentNullException("atom");
}
bool f = atom.ShouldBePersisted();
return(f);
}
/// <summary>Parses the base attributes and puts the rest in extensions.
/// This needs to happen AFTER known attributes are parsed.</summary>
/// <param name="reader">correctly positioned xmlreader</param>
/// <param name="baseObject">the base object to set the property on</param>
/// <returns> true if an unknown attribute was found</returns>
protected bool ParseBaseAttributes(XmlReader reader, AtomBase baseObject)
{
Tracing.Assert(reader != null, "reader should not be null");
if (reader == null)
{
throw new ArgumentNullException("reader");
}
Tracing.Assert(baseObject != null, "baseObject should not be null");
if (baseObject == null)
{
throw new ArgumentNullException("baseObject");
}
bool fRet = false;
fRet = true;
object localName = reader.LocalName;
Tracing.TraceCall();
if (IsCurrentNameSpace(reader, BaseNameTable.NSXml))
{
if (localName.Equals(this.nameTable.Base))
{
baseObject.Base = new AtomUri(reader.Value);
fRet = false;
}
else if (localName.Equals(this.nameTable.Language))
{
baseObject.Language = Utilities.DecodedValue(reader.Value);
fRet = false;
}
}
else if (IsCurrentNameSpace(reader, BaseNameTable.gNamespace))
{
ISupportsEtag se = baseObject as ISupportsEtag;
if (se != null)
{
if (localName.Equals(this.nameTable.ETag))
{
se.Etag = reader.Value;
fRet = false;
}
}
}
if (fRet == true)
{
Tracing.TraceInfo("Found an unknown attribute");
this.OnNewExtensionElement(reader, baseObject);
}
return(fRet);
}
/// <summary>parses an AtomTextConstruct</summary>
/// <param name="reader">the xmlreader correctly positioned at the construct </param>
/// <param name="owner">the container element</param>
/// <returns>the new text construct </returns>
protected AtomTextConstruct ParseTextConstruct(XmlReader reader, AtomBase owner)
{
Tracing.Assert(reader != null, "reader should not be null");
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (owner == null)
{
throw new System.ArgumentNullException("owner");
}
Tracing.TraceCall("Parsing atomTextConstruct");
AtomTextConstruct construct = owner.CreateAtomSubElement(reader, this) as AtomTextConstruct;
if (reader.NodeType == XmlNodeType.Element)
{
if (reader.HasAttributes)
{
while (reader.MoveToNextAttribute())
{
object attributeName = reader.LocalName;
if (attributeName.Equals(this.nameTable.Type))
{
construct.Type = (AtomTextConstructType)Enum.Parse(
typeof(AtomTextConstructType), Utilities.DecodedValue(reader.Value), true);
}
else
{
ParseBaseAttributes(reader, construct);
}
}
}
reader.MoveToElement();
switch (construct.Type)
{
case AtomTextConstructType.html:
case AtomTextConstructType.text:
construct.Text = Utilities.DecodedValue(reader.ReadString());
break;
case AtomTextConstructType.xhtml:
default:
construct.Text = reader.ReadInnerXml();
break;
}
}
return(construct);
}
/// <summary>parses an author/person object</summary>
/// <param name="reader"> an XmlReader positioned at the start of the author</param>
/// <param name="owner">the object containing the person</param>
/// <returns> the created author object</returns>
protected AtomPerson ParsePerson(XmlReader reader, AtomBase owner)
{
Tracing.Assert(reader != null, "reader should not be null");
if (reader == null)
{
throw new ArgumentNullException("reader");
}
Tracing.Assert(owner != null, "owner should not be null");
if (owner == null)
{
throw new ArgumentNullException("owner");
}
Tracing.TraceCall();
object localname = null;
AtomPerson author = owner.CreateAtomSubElement(reader, this) as AtomPerson;
ParseBasicAttributes(reader, author);
int lvl = -1;
while (NextChildElement(reader, ref lvl))
{
localname = reader.LocalName;
if (localname.Equals(this.nameTable.Name))
{
// author.Name = Utilities.DecodeString(Utilities.DecodedValue(reader.ReadString()));
author.Name = Utilities.DecodedValue(reader.ReadString());
reader.Read();
}
else if (localname.Equals(this.nameTable.Uri))
{
author.Uri = new AtomUri(Utilities.DecodedValue(reader.ReadString()));
reader.Read();
}
else if (localname.Equals(this.nameTable.Email))
{
author.Email = Utilities.DecodedValue(reader.ReadString());
reader.Read();
}
else
{
// default extension parsing.
ParseExtensionElements(reader, author);
}
}
return(author);
}
/// <summary>eventfiring helper for new extensions</summary>
/// <param name="node"> the new node that was found</param>
/// <param name="baseObject"> the object this node should be added to</param>
protected void OnNewExtensionElement(XmlNode node, AtomBase baseObject)
{
ExtensionElementEventArgs args = new ExtensionElementEventArgs();
args.ExtensionElement = node;
args.Base = baseObject;
if (this.NewExtensionElement != null)
{
this.NewExtensionElement(this, args);
}
if (!args.DiscardEntry)
{
baseObject.ExtensionElements.Add(new XmlExtension(node));
}
}
/// <summary>Inserts an AtomBase entry against a Uri</summary>
/// <param name="feedUri">the uri for the feed this object should be posted against</param>
/// <param name="baseEntry">the entry to be inserted</param>
/// <param name="type">the type of request to create</param>
/// <param name="data">the async data payload</param>
/// <returns> the response as a stream</returns>
internal virtual Stream EntrySend(Uri feedUri, AtomBase baseEntry, GDataRequestType type, AsyncSendData data)
{
Tracing.Assert(feedUri != null, "feedUri should not be null");
if (feedUri == null)
{
throw new ArgumentNullException("feedUri");
}
Tracing.Assert(baseEntry != null, "baseEntry should not be null");
if (baseEntry == null)
{
throw new ArgumentNullException("baseEntry");
}
this.versionInfo.ImprintVersion(baseEntry);
IGDataRequest request = this.RequestFactory.CreateRequest(type, feedUri);
request.Credentials = this.Credentials;
ISupportsEtag eTarget = request as ISupportsEtag;
ISupportsEtag eSource = baseEntry as ISupportsEtag;
if (eTarget != null && eSource != null)
{
eTarget.Etag = eSource.Etag;
}
request.ContentStore = baseEntry;
request.IsBatch = type == GDataRequestType.Batch;
if (data != null)
{
GDataGAuthRequest gr = request as GDataGAuthRequest;
if (gr != null)
{
gr.AsyncData = data;
}
}
Stream outputStream = request.GetRequestStream();
baseEntry.SaveToXml(outputStream);
request.Execute();
outputStream.Close();
return(request.GetResponseStream());
}
/// <summary>parses an AtomGenerator</summary>
/// <param name="reader">the xmlreader correctly positioned at the generator </param>
/// <param name="owner">the container element</param>
/// <returns> </returns>
protected AtomGenerator ParseGenerator(XmlReader reader, AtomBase owner)
{
Tracing.Assert(reader != null, "reader should not be null");
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (owner == null)
{
throw new ArgumentNullException("owner");
}
Tracing.TraceCall();
AtomGenerator generator = owner.CreateAtomSubElement(reader, this) as AtomGenerator;
if (generator != null)
{
generator.Text = Utilities.DecodedValue(reader.ReadString());
if (reader.HasAttributes)
{
while (reader.MoveToNextAttribute())
{
object attributeName = reader.LocalName;
if (attributeName.Equals(this.nameTable.Uri))
{
generator.Uri = new AtomUri(reader.Value);
}
else if (attributeName.Equals(this.nameTable.Version))
{
generator.Version = Utilities.DecodedValue(reader.Value);
}
else
{
ParseBaseAttributes(reader, generator);
}
}
}
}
return(generator);
}
/// <summary>tries to parse a category collection document</summary>
/// <param name="reader"> xmlReader positioned at the start element</param>
/// <param name="owner">the base object that the collection belongs to</param>
/// <returns></returns>
public AtomCategoryCollection ParseCategories(XmlReader reader, AtomBase owner)
{
Tracing.Assert(reader != null, "reader should not be null");
if (reader == null)
{
throw new ArgumentNullException("reader");
}
AtomCategoryCollection ret = new AtomCategoryCollection();
MoveToStartElement(reader);
Tracing.TraceCall("entering Categories Parser");
object localname = reader.LocalName;
Tracing.TraceInfo("localname is: " + reader.LocalName);
if (IsCurrentNameSpace(reader, BaseNameTable.AppPublishingNamespace(owner)) &&
localname.Equals(this.nameTable.Categories))
{
Tracing.TraceInfo("Found categories document");
int depth = -1;
while (NextChildElement(reader, ref depth))
{
localname = reader.LocalName;
if (IsCurrentNameSpace(reader, BaseNameTable.NSAtom))
{
if (localname.Equals(this.nameTable.Category))
{
AtomCategory category = ParseCategory(reader, owner);
ret.Add(category);
}
}
}
}
else
{
Tracing.TraceInfo("ParseCategories called and nothing was parsed" + localname);
throw new ClientFeedException("An invalid Atom Document was passed to the parser. This was not an app:categories document: " + localname);
}
return(ret);
}
/// <summary>eventfiring helper for new extensions</summary>
/// <param name="reader"> the reader positioned on the extension</param>
/// <param name="baseObject"> the object this node should be added to</param>
protected void OnNewExtensionElement(XmlReader reader, AtomBase baseObject)
{
Tracing.Assert(reader != null, "reader should not be null");
if (reader == null)
{
throw new ArgumentNullException("reader");
}
Tracing.Assert(baseObject != null, "baseObject should not be null");
if (baseObject == null)
{
throw new ArgumentNullException("baseObject");
}
if (reader.NodeType == XmlNodeType.Element || reader.NodeType == XmlNodeType.Attribute)
{
XmlNode node = this.Document.ReadNode(reader);
if (node != null)
{
OnNewExtensionElement(node, baseObject);
}
}
}
/// <summary>creates an AtomContent object by parsing an xml stream</summary>
/// <param name="reader">a XMLReader positioned correctly </param>
/// <param name="owner">the container element</param>
/// <returns> null or an AtomContent object</returns>
protected AtomContent ParseContent(XmlReader reader, AtomBase owner)
{
Tracing.Assert(reader != null, "reader should not be null");
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (owner == null)
{
throw new ArgumentNullException("owner");
}
AtomContent content = owner.CreateAtomSubElement(reader, this) as AtomContent;
Tracing.TraceCall();
if (content != null)
{
if (reader.HasAttributes)
{
while (reader.MoveToNextAttribute())
{
object localname = reader.LocalName;
if (localname.Equals(this.nameTable.Type))
{
content.Type = Utilities.DecodedValue(reader.Value);
}
else if (localname.Equals(this.nameTable.Src))
{
content.Src = new AtomUri(reader.Value);
}
else
{
ParseBaseAttributes(reader, content);
}
}
}
if (MoveToStartElement(reader))
{
if (content.Type.Equals("text") ||
content.Type.Equals("html") ||
content.Type.StartsWith("text/"))
{
// if it's text it get's just the string treatment. No
// subelements are allowed here
content.Content = Utilities.DecodedValue(reader.ReadString());
}
else if (content.Type.Equals("xhtml") ||
content.Type.Contains("/xml") ||
content.Type.Contains("+xml"))
{
// do not get childlists if the element is empty. That would skip to the next element
if (!reader.IsEmptyElement)
{
// everything else will be nodes in the extension element list
// different media type. Create extension elements
int lvl = -1;
while (NextChildElement(reader, ref lvl))
{
ParseExtensionElements(reader, content);
}
}
}
else
{
// everything else SHOULD be base 64 encoded, so one big string
// i know the if statement could be combined with the text handling
// but i consider it clearer to make a 3 cases statement than combine them
content.Content = Utilities.DecodedValue(reader.ReadString());
}
}
}
return(content);
}
/// <summary>creates an atomlink object</summary>
/// <param name="reader">correctly positioned xmlreader</param>
/// <param name="owner">the object containing the person</param>
/// <returns> the created AtomLink object</returns>
protected AtomLink ParseLink(XmlReader reader, AtomBase owner)
{
Tracing.Assert(reader != null, "reader should not be null");
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (owner == null)
{
throw new ArgumentNullException("owner");
}
bool noChildren = reader.IsEmptyElement;
Tracing.TraceCall();
AtomLink link = owner.CreateAtomSubElement(reader, this) as AtomLink;
object localname = null;
if (reader.HasAttributes)
{
while (reader.MoveToNextAttribute())
{
localname = reader.LocalName;
if (localname.Equals(this.nameTable.HRef))
{
link.HRef = new AtomUri(reader.Value);
}
else if (localname.Equals(this.nameTable.Rel))
{
link.Rel = Utilities.DecodedValue(reader.Value);
}
else if (localname.Equals(this.nameTable.Type))
{
link.Type = Utilities.DecodedValue(reader.Value);
}
else if (localname.Equals(this.nameTable.HRefLang))
{
link.HRefLang = Utilities.DecodedValue(reader.Value);
}
else if (localname.Equals(this.nameTable.Title))
{
link.Title = Utilities.DecodedValue(reader.Value);
}
else if (localname.Equals(this.nameTable.Length))
{
link.Length = int.Parse(Utilities.DecodedValue(reader.Value), CultureInfo.InvariantCulture);
}
else
{
ParseBaseAttributes(reader, link);
}
}
}
if (!noChildren)
{
reader.MoveToElement();
int lvl = -1;
while (NextChildElement(reader, ref lvl))
{
ParseExtensionElements(reader, link);
}
}
return(link);
}