/// <summary>
/// Reads a known DescribedType object from the buffer given the already read descriptor.
/// </summary>
/// <param name="buffer"></param>
/// <param name="descriptor"></param>
public static object DecodeKnownDescribedType(ByteBuffer buffer, Descriptor descriptor)
{
Func <object> ctor;
if (DescribedTypeCodec.TryGetKnownDescribedConstructor(descriptor.Code, out ctor))
{
var instance = ctor() as DescribedType;
instance.Decode(buffer);
return(instance);
}
else
{
throw new AmqpException(ErrorCode.DecodeError, $"Missing Constructor For Known Described Type {descriptor.ToString()}");
}
}
/// <summary>
/// Reads a Descriptor and DescribedType object from the buffer.
/// </summary>
/// <param name="buffer"></param>
public static object DecodeDescribedType(ByteBuffer buffer, byte formatCode)
{
if (formatCode != FormatCode.Described)
{
throw new ArgumentException(nameof(formatCode), "Format code must be described (0x00)");
}
var descriptor = DecodeDescriptor(buffer);
if (DescribedTypeCodec.IsKnownDescribedType(descriptor))
{
return(DecodeKnownDescribedType(buffer, descriptor));
}
object value = DecodeBoxedObject(buffer); // TODO: performance. boxing
return(DescribedTypeCodec.GetDescribedTypeConstructor(value.GetType())(descriptor, value));
}
/// <summary>
/// Reads a described type descriptor from the buffer. It may return a known static Descriptor.
/// </summary>
/// <param name="buffer"></param>
public static Descriptor DecodeDescriptor(ByteBuffer buffer)
{
var descriptorFormatCode = DecodeFormatCode(buffer);
if (descriptorFormatCode == FormatCode.ULong ||
descriptorFormatCode == FormatCode.SmallULong)
{
ulong code = Encoder.ReadULong(buffer, descriptorFormatCode);
Descriptor descriptor = null;
if (DescribedTypeCodec.TryGetKnownDescribedType(code, out descriptor))
{
return(descriptor);
}
return(new Descriptor(code));
}
if (descriptorFormatCode == FormatCode.Symbol8 ||
descriptorFormatCode == FormatCode.Symbol32)
{
string symbol = Encoder.ReadSymbol(buffer, descriptorFormatCode);
return(new Descriptor(symbol));
}
throw new AmqpException(ErrorCode.FramingError, $"Invalid Descriptor Format Code{descriptorFormatCode.ToHex()}");
}
