/// <summary>
/// Registers specified decoder (unmarshaller)
/// <para>Python.NET will pick suitable encoder/decoder registered first</para>
/// </summary>
public static void RegisterDecoder(IPyObjectDecoder decoder)
{
if (decoder == null)
{
throw new ArgumentNullException(nameof(decoder));
}
lock (decoders)
{
decoders.Add(decoder);
}
}
/// <summary>
/// Gets a concrete instance of <see cref="IPyObjectDecoder"/>
/// (potentially selecting one from a collection),
/// that can decode from <paramref name="objectType"/> to <paramref name="targetType"/>,
/// or <c>null</c> if a matching decoder can not be found.
/// </summary>
public static IPyObjectDecoder GetDecoder(
this IPyObjectDecoder decoder,
PyObject objectType, Type targetType)
{
if (decoder is null)
{
throw new ArgumentNullException(nameof(decoder));
}
if (decoder is IEnumerable <IPyObjectDecoder> composite)
{
return(composite
.Select(nestedDecoder => nestedDecoder.GetDecoder(objectType, targetType))
.FirstOrDefault(d => d != null));
}
return(decoder.CanDecode(objectType, targetType) ? decoder : null);
}
