////////////////////////////////////////////////////////////////////////////////////////////////////////////////
internal static async Task <S101Message> ReadFromAsync(
ReadBuffer readBuffer, CancellationToken cancellationToken)
{
if (!await readBuffer.ReadAsync(cancellationToken))
{
return(null);
}
var slot = readBuffer[readBuffer.Index++];
byte messageType;
S101Command command;
try
{
await readBuffer.FillAsync(1, cancellationToken);
messageType = GetMessageType(readBuffer);
command = await S101Command.ReadFromAsync(readBuffer, cancellationToken);
}
catch (EndOfStreamException ex)
{
throw new S101Exception("Unexpected end of stream.", ex);
}
return(new S101Message(slot, messageType, command));
}
/// <summary>Initializes a new instance of the <see cref="S101Message"/> class.</summary>
/// <exception cref="ArgumentNullException"><paramref name="command"/> equals <c>null</c>.</exception>
public S101Message(byte slot, S101Command command)
: this(slot, MessageType.Ember, command)
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
}
private bool ReadCore()
{
while (this.logReader.IsStartElement(LogNames.Event))
{
switch (this.eventType = this.logReader.GetAttribute(LogNames.Type))
{
case LogNames.Message:
this.timeUtc = this.ReadTime();
this.direction = this.logReader.GetAttribute(LogNames.Direction);
this.number = int.Parse(
this.logReader.GetAttribute(LogNames.Number),
NumberStyles.None,
CultureInfo.InvariantCulture);
this.logReader.ReadStartElement(LogNames.Event);
this.logReader.ReadStartElement(LogNames.Slot);
var slot = ParseHex(this.logReader.ReadContentAsString());
this.logReader.ReadEndElement();
this.logReader.ReadStartElement(LogNames.Command);
var command = S101Command.Parse(this.logReader.ReadContentAsString());
this.logReader.ReadEndElement();
this.message = new S101Message(slot, command);
if (!this.logReader.IsStartElement(LogNames.Payload))
{
throw new XmlException("The Payload element is missing.");
}
this.payload = this.GetLogPayload();
return(true);
case LogNames.OutOfFrameByte:
this.timeUtc = this.ReadTime();
this.direction = this.logReader.GetAttribute(LogNames.Direction);
this.number = 0;
this.message = null;
this.logReader.ReadStartElement(LogNames.Event);
this.payload = new[] { ParseHex(this.logReader.ReadContentAsString()) };
this.logReader.ReadEndElement();
return(true);
default:
this.logReader.Skip();
break;
}
}
this.logReader.ReadEndElement();
this.Clear();
return(false);
}
private S101Message(byte slot, byte messageType, S101Command command)
{
this.Slot = slot;
this.messageType = messageType;
this.Command = command;
}