/// <summary>
/// Writes a controller to a stream.
/// </summary>
/// <param name="stream"></param>
/// <param name="controller"></param>
public void Write(Stream stream, object controller)
{
if (controller == null)
{
throw new ArgumentNullException(nameof(controller));
}
// For fallback support, allow byte arrays/streams to be passed.
// We simply write it as is.
if (controller is byte[] byteBuffer)
{
stream.Write(byteBuffer, 0, byteBuffer.Length);
return;
}
if (controller is Stream inputStream)
{
inputStream.CopyTo(stream);
return;
}
using (var writer = new BinaryWriter(stream, FileEncoding.Default, true))
{
Type controllerType = controller.GetType();
IControllerSerializer cs = _controllerSerializerResolver.GetSerializer(controllerType);
if (!controllerType.IsBehaviorController())
{
ControllerAttribute controllerAttribute = controllerType.GetCustomAttribute <ControllerAttribute>() ?? new ControllerAttribute();
if (controllerAttribute.SubType.HasValue)
{
writer.Write(controllerAttribute.SubType.Value);
}
if (controllerType.IsAnimationController() || !controllerAttribute.SubType.HasValue)
{
// Skip writing the count field, the serializer will take care of it.
}
else
{
writer.Write((ushort)0);
}
cs.Serialize(stream, (Controller)controller);
return;
}
// Test if the type is from our controller assembly.
if (!_controllerFactory.CanCreate(controllerType))
{
throw new NotSupportedException("Invalid controller.");
}
// We don't know the size yet, so just write 0 for now.
writer.Write(0);
long startPos = stream.Position;
cs.Serialize(stream, (Controller)controller);
// After the controller is written, determine and write the size.
long currentPos = stream.Position;
stream.Position = startPos - 4;
writer.Write((int)(currentPos - startPos));
// Restore position to the end of the controller.
stream.Position = currentPos;
}
}
