public SerializationContext(Stream stream, SerializationContext parent)
{
this.stream = stream;
if (parent == null)
{
workspace = new byte[InitialBufferLength];
ioBuffer = new byte[IO_BUFFER_SIZE];
}
else
{
ReadFrom(parent);
}
}
public int Serialize(IExtension extension)
{
if (extension == null) return 0;
Stream stream = extension.BeginAppend();
try
{
SerializationContext ctx = new SerializationContext(stream, null);
int len = Serialize(ctx);
ctx.Flush();
extension.EndAppend(stream, true);
return len;
}
catch
{
extension.EndAppend(stream, false);
throw;
}
}
private void TraceChangeOrigin(SerializationContext context)
{
long newPos = stream.Position, oldPos = context.stream.Position;
if(oldPos != newPos)
{
Debug.WriteLine(new string('!', stackDepth) +
string.Format(" re-based: {0} now {1}", oldPos, newPos),
SerializationContext.DebugCategory);
}
}
public void ReadFrom(SerializationContext context)
{
if (context == null) throw new ArgumentNullException("context");
this.workspace = context.workspace;
this.objectStack = context.objectStack;
this.stackDepth = context.stackDepth;
this.streamState = context.streamState;
this.peekedValue = context.peekedValue;
this.ioBuffer = context.ioBuffer;
this.ioBufferIndex = context.ioBufferIndex;
this.inputStreamAvailable = context.inputStreamAvailable;
this.ioBufferEffectiveSize = context.ioBufferEffectiveSize;
TraceChangeOrigin(context); // note ConditionalAttribute
// IMPORTANT: don't copy the group stack; we want to
// validate that the group-stack is empty when finding the end of a stream
}
public override int Serialize(SerializationContext context)
{
return WritePrefix(context) + context.EncodeInt32(wireValue);
}
protected int WritePrefix(SerializationContext context)
{
return prefix == 0 ? 0 : context.EncodeUInt32(prefix);
}
public abstract int Serialize(SerializationContext context);