public override Task <string> ReadElementContentAsStringAsync()
{
CheckAsync();
var task = _coreReader.ReadElementContentAsStringAsync();
_lastTask = task;
return(task);
}
public async Task ReadXmlAsync(XmlReader reader)
{
Contract.Requires<ArgumentNullException>(reader != null, "reader");
if (reader.ReadState == ReadState.Initial)
{
await reader.ReadAsync();
if (reader.NodeType == XmlNodeType.XmlDeclaration)
{
await reader.ReadAsync();
}
}
else
{
reader.MoveToElement();
}
if (!(reader.NodeType == XmlNodeType.Element && (reader.Name == "feed" || reader.Name == "entry")))
{
throw new InvalidDataException(); // TODO: Diagnostics
}
string rootElementName = reader.Name;
var entries = new List<AtomEntry>();
this.Entries = entries;
var links = new Dictionary<string, Uri>();
this.Links = links;
var messages = new List<Message>();
this.Messages = messages;
await reader.ReadAsync();
while (reader.NodeType == XmlNodeType.Element)
{
string name = reader.Name;
switch (name)
{
case "title":
this.Title = await reader.ReadElementContentAsync(StringConverter.Instance);
break;
case "id":
this.Id = await reader.ReadElementContentAsync(UriConverter.Instance);
break;
case "author":
await reader.ReadAsync();
if (!(reader.NodeType == XmlNodeType.Element && reader.Name == "name"))
{
throw new InvalidDataException(); // TODO: Diagnostics
}
this.Author = await reader.ReadElementContentAsync(StringConverter.Instance);
if (!(reader.NodeType == XmlNodeType.EndElement && reader.Name == "author"))
{
throw new InvalidDataException(); // TODO: Diagnostics
}
await reader.ReadAsync();
break;
case "generator":
string build = reader.GetAttribute("build");
if (build == null)
{
throw new InvalidDataException(); // TODO: Diagnostics
}
string version = reader.GetAttribute("version");
if (version == null)
{
throw new InvalidDataException(); // TODO: Diagnostics
}
this.GeneratorVersion = VersionConverter.Instance.Convert(string.Join(".", version, build));
await reader.ReadAsync();
break;
case "updated":
this.Updated = await reader.ReadElementContentAsync(DateTimeConverter.Instance);
break;
case "entry":
var entry = new AtomEntry();
await entry.ReadXmlAsync(reader);
entries.Add(entry);
break;
case "link":
string href = reader.GetAttribute("href");
if (string.IsNullOrWhiteSpace(href))
{
throw new InvalidDataException(); // TODO: Diagnostics
}
string rel = reader.GetAttribute("rel");
if (string.IsNullOrWhiteSpace(rel))
{
throw new InvalidDataException(); // TODO: Diagnostics
}
links[rel] = UriConverter.Instance.Convert(href);
await reader.ReadAsync();
break;
case "s:messages":
bool isEmptyElement = reader.IsEmptyElement;
await reader.ReadAsync();
if (isEmptyElement)
{
continue;
}
while (reader.NodeType == XmlNodeType.Element && reader.Name == "s:msg")
{
string value = reader.GetAttribute("type");
if (value == null)
{
throw new InvalidDataException(); // TODO: Diagnostics
}
MessageType type = EnumConverter<MessageType>.Instance.Convert(value);
string text = await reader.ReadElementContentAsStringAsync();
messages.Add(new Message(type, text));
}
if (reader.NodeType == XmlNodeType.EndElement)
{
if (reader.Name != "s:messages")
{
throw new InvalidDataException(); // TODO: Diagnostics
}
await reader.ReadAsync();
}
break;
case "opensearch:itemsPerPage":
int itemsPerPage = await reader.ReadElementContentAsync(Int32Converter.Instance);
this.Pagination = new Pagination(itemsPerPage, this.Pagination.StartIndex, this.Pagination.TotalResults);
break;
case "opensearch:startIndex":
int startIndex = await reader.ReadElementContentAsync(Int32Converter.Instance);
this.Pagination = new Pagination(this.Pagination.ItemsPerPage, startIndex, this.Pagination.TotalResults);
break;
case "opensearch:totalResults":
int totalResults = await reader.ReadElementContentAsync(Int32Converter.Instance);
this.Pagination = new Pagination(this.Pagination.ItemsPerPage, this.Pagination.StartIndex, totalResults);
break;
default: throw new InvalidDataException(string.Format("Found invalid data while decoding: {0}", reader));
}
}
if (!(reader.NodeType == XmlNodeType.EndElement && reader.Name == rootElementName))
{
throw new InvalidDataException(); // TODO: Diagnostics
}
await reader.ReadAsync();
}
/// <summary>
/// Asynchronously reads XML data into the current <see cref="AtomFeed"/>.
/// </summary>
/// <exception cref="InvalidDataException">
/// Thrown when an Invalid Data error condition occurs.
/// </exception>
/// <param name="reader">
/// The reader from which to read.
/// </param>
/// <returns>
/// A <see cref="Task"/> representing the operation.
/// </returns>
public async Task ReadXmlAsync(XmlReader reader)
{
Contract.Requires<ArgumentNullException>(reader != null, "reader");
this.Author = null;
this.Entries = null;
this.GeneratorVersion = null;
this.Id = null;
this.Links = null;
this.Messages = null;
this.Pagination = Pagination.None;
this.Title = null;
this.Updated = DateTime.MinValue;
reader.Requires(await reader.MoveToDocumentElementAsync("feed"));
var documentElementName = reader.Name;
List<AtomEntry> entries = null;
Dictionary<string, Uri> links = null;
List<Message> messages = null;
await reader.ReadAsync();
while (reader.NodeType == XmlNodeType.Element)
{
string name = reader.Name;
switch (name)
{
case "title":
this.Title = await reader.ReadElementContentAsync(StringConverter.Instance);
break;
case "id":
this.Id = await reader.ReadElementContentAsync(UriConverter.Instance);
break;
case "author":
await reader.ReadAsync();
reader.EnsureMarkup(XmlNodeType.Element, "name");
this.Author = await reader.ReadElementContentAsync(StringConverter.Instance);
reader.EnsureMarkup(XmlNodeType.EndElement, "author");
await reader.ReadAsync();
break;
case "generator":
// string build = reader.GetRequiredAttribute("build"); // TODO: Incorporate build number? Build number sometimes adds a fifth digit.
string version = reader.GetRequiredAttribute("version");
this.GeneratorVersion = VersionConverter.Instance.Convert(string.Join(".", version));
await reader.ReadAsync();
break;
case "updated":
this.Updated = await reader.ReadElementContentAsync(DateTimeConverter.Instance);
break;
case "entry":
var entry = new AtomEntry();
if (entries == null)
{
entries = new List<AtomEntry>();
}
entries.Add(entry);
await entry.ReadXmlAsync(reader);
break;
case "link":
var href = reader.GetRequiredAttribute("href");
var rel = reader.GetRequiredAttribute("rel");
if (links == null)
{
links = new Dictionary<string, Uri>();
}
links[rel] = UriConverter.Instance.Convert(href);
await reader.ReadAsync();
break;
case "s:messages":
bool isEmptyElement = reader.IsEmptyElement;
await reader.ReadAsync();
if (messages == null)
{
messages = new List<Message>();
}
if (isEmptyElement)
{
continue;
}
while (reader.NodeType == XmlNodeType.Element && reader.Name == "s:msg")
{
var value = reader.GetRequiredAttribute("type");
var type = EnumConverter<MessageType>.Instance.Convert(value);
var text = await reader.ReadElementContentAsStringAsync();
messages.Add(new Message(type, text));
}
if (reader.NodeType == XmlNodeType.EndElement)
{
reader.EnsureMarkup(XmlNodeType.EndElement, "s:messages");
await reader.ReadAsync();
}
break;
case "opensearch:itemsPerPage":
int itemsPerPage = await reader.ReadElementContentAsync(Int32Converter.Instance);
this.Pagination = new Pagination(itemsPerPage, this.Pagination.StartIndex, this.Pagination.TotalResults);
break;
case "opensearch:startIndex":
int startIndex = await reader.ReadElementContentAsync(Int32Converter.Instance);
this.Pagination = new Pagination(this.Pagination.ItemsPerPage, startIndex, this.Pagination.TotalResults);
break;
case "opensearch:totalResults":
int totalResults = await reader.ReadElementContentAsync(Int32Converter.Instance);
this.Pagination = new Pagination(this.Pagination.ItemsPerPage, this.Pagination.StartIndex, totalResults);
break;
default: throw new InvalidDataException(string.Format("Unexpected start tag: {0}", reader.Name)); // TODO: Improved diagnostics
}
}
reader.EnsureMarkup(XmlNodeType.EndElement, documentElementName);
await reader.ReadAsync();
if (entries != null)
{
this.Entries = new ReadOnlyCollection<AtomEntry>(entries);
}
if (links != null)
{
this.Links = new ReadOnlyDictionary<string, Uri>(links);
}
if (messages != null)
{
this.Messages = new ReadOnlyCollection<Message>(messages);
}
}