internal static BarfObjectHeader ReadFrom(IPrimitiveReader reader)
{
var value = reader.ReadVarInt32();
if (value == -1)
{
return(NullBarfObjectHeader.Instance);
}
if (value < 0)
{
reader.RaiseInvalidDataException();
}
var result = new BarfObjectHeader {
Version = value
};
value = reader.ReadVarInt32();
if (value < 0)
{
reader.RaiseInvalidDataException();
}
result.MinVersion = value;
value = reader.ReadInt32();
if (value < 0)
{
reader.RaiseInvalidDataException();
}
result.Length = value;
result.StartPosition = reader.BaseStream.Position;
return(result);
}
public static BarfSerializationTypeInfo Create(BarfObjectHeader originalHeader, byte[] futureData)
{
return(new BarfSerializationTypeInfo
{
OriginalHeader = originalHeader,
FutureData = futureData
});
}
public void EndObject(long headerPosition)
{
--_recursionCount;
BarfObjectHeader.EndWrite(Writer, headerPosition);
EnsureCloseStreamHeader();
}
private long BeginObject(int version, int minVersion)
{
EnsureOpenStreamHeader();
var headerPosition = BarfObjectHeader.BeginWrite(Writer, version, minVersion);
++_recursionCount;
return(headerPosition);
}
/// <summary>
/// Ends a region of code that deserializes a barf type.
/// </summary>
public void EndObject <T>(BarfObjectHeader header)
{
--_objectDepth;
if (!header.IsNull && Reader.BaseStream.Position < header.EndPosition)
{
RaiseInvalidData <T>(header, "There is data remaining but there shouldn't be.");
}
if (_objectDepth == 0)
{
StreamHeader = null;
TypeTable = null;
if (_streamEnd > 0L)
{
Reader.BaseStream.Seek(_streamEnd, SeekOrigin.Begin);
_streamEnd = 0L;
}
}
}
/// <summary>
/// Captures the future data.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="header">The header.</param>
/// <param name="instance">The instance.</param>
public void CaptureFutureData <T>(BarfObjectHeader header, ref T instance)
where T : ISerializationInfo
{
if (header.EndPosition < Reader.BaseStream.Position)
{
RaiseInvalidData <T>(header, "Can't capture future data when the current position is past the current position.");
}
var remainingLength = header.EndPosition - Reader.BaseStream.Position;
var futureData = new byte[remainingLength];
Reader.BaseStream.Read(futureData, 0, futureData.Length);
var typeInfo = BarfSerializationTypeInfo.Create(header, futureData);
var info = (BarfSerializationInfo)instance.SerializationInfo ?? new BarfSerializationInfo();
info.Add(typeof(T), typeInfo);
instance.SerializationInfo = info;
}
public void WriteNullObject()
{
EnsureOpenStreamHeader();
BarfObjectHeader.WriteNull(Writer);
EnsureCloseStreamHeader();
}
/// <summary>
/// Begins a region of code that deserializes a barf type.
/// </summary>
public BarfObjectHeader BeginObject <T>()
{
var def = BarfTypeDefinition.Get <T>(true);
bool deserializeTypeTable = false;
if (StreamHeader == null)
{
StreamHeader = BarfStreamHeader.ReadFrom(Reader);
if (StreamHeader.FrameworkVersion > BarfFormatter.MaxFrameworkVersion)
{
string message = string.Format(
"Encountered a BARF formatted stream with FrameworkVersion=\"{0}\" but MaxFrameworkVersion=\"{1}\".",
StreamHeader.FrameworkVersion,
BarfFormatter.MaxFrameworkVersion);
throw new UnhandledVersionException(message);
}
deserializeTypeTable = StreamHeader.Flags.IsSet(HeaderFlags.HasNameTable);
}
var objectHeader = BarfObjectHeader.ReadFrom(Reader);
if (!objectHeader.IsNull)
{
if (objectHeader.Version < def.MinVersion)
{
var message = string.Format(
"Binary data was encoded with Version=\"{0}\" but the current MinVersion=\"{1}\".",
objectHeader.Version,
def.MinVersion);
throw new UnhandledVersionException(message);
}
if (def.CurrentVersion < objectHeader.MinVersion)
{
var message = string.Format(
"Binary data was encoded with a MinVersion=\"{0}\" but CurrentVersion=\"{1}\" is less than that.",
objectHeader.MinVersion,
def.CurrentVersion);
throw new UnhandledVersionException(message);
}
if (objectHeader.Version < def.MinDeserializeVersion)
{
var message = string.Format(
"Binary data is Version=\"{0}\" but MinDeserializeVersion=\"{1}\".",
objectHeader.Version,
def.MinDeserializeVersion);
throw new UnhandledVersionException(message);
}
}
if (deserializeTypeTable)
{
var currentPosition = Reader.BaseStream.Position;
Reader.BaseStream.Seek(objectHeader.Length, SeekOrigin.Current);
TypeTable = BarfTypeTable.ReadFrom(Reader);
_streamEnd = Reader.BaseStream.Position;
Reader.BaseStream.Seek(currentPosition, SeekOrigin.Begin);
}
++_objectDepth;
return(objectHeader);
}
public void RaiseInvalidData <T>(BarfObjectHeader header)
{
RaiseInvalidData <T>(header, null);
}
public void RaiseInvalidData <T>(BarfObjectHeader header, string message)
{
var builder = new StringBuilder();
var w = XmlWriter.Create(builder, new XmlWriterSettings
{
Indent = true,
IndentChars = "\t",
OmitXmlDeclaration = true,
ConformanceLevel = ConformanceLevel.Fragment,
NewLineChars = Environment.NewLine,
NewLineHandling = NewLineHandling.Entitize,
NewLineOnAttributes = false
});
w.WriteStartElement("Details");
{
if (!string.IsNullOrEmpty(message))
{
w.WriteElementString("Message", message);
}
w.WriteElementString("Type", typeof(T).ToString());
w.WriteElementString("Position", Reader.BaseStream.Position.ToString());
w.WriteElementString("ObjectDepth", _objectDepth.ToString());
if (header != null)
{
w.WriteStartElement("ObjectHeader");
{
w.WriteElementString("IsNull", header.IsNull.ToString());
if (!header.IsNull)
{
w.WriteElementString("Version", header.Version.ToString());
w.WriteElementString("MinVersion", header.MinVersion.ToString());
w.WriteElementString("Length", header.Length.ToString());
w.WriteElementString("StartPosition", header.StartPosition.ToString());
w.WriteElementString("EndPosition", header.EndPosition.ToString());
}
}
w.WriteEndElement();
}
w.WriteStartElement("CurrentDefinition");
{
var def = BarfTypeDefinition.Get <T>(false);
if (def == null || !def.IsValid)
{
w.WriteElementString("Error", "Couldn't load definition for type - " + typeof(T));
}
else
{
w.WriteElementString("CurrentVersion", def.CurrentVersion.ToString());
w.WriteElementString("MinVersion", def.MinVersion.ToString());
w.WriteElementString("MinDeserializeVersion", def.MinDeserializeVersion.ToString());
}
}
w.WriteEndElement();
w.WriteStartElement("StreamHeader");
{
w.WriteElementString("FrameworkVersion", StreamHeader.FrameworkVersion.ToString());
w.WriteElementString("Flags", StreamHeader.Flags.ToString());
w.WriteElementString("Length", StreamHeader.Length.ToString());
}
w.WriteEndElement();
}
w.WriteEndElement();
w.Flush();
throw new InvalidDataException(builder.ToString());
}
