/// <summary>
/// Creates a stream.
/// </summary>
/// <typeparam name="TInput">Type of the data received by the subject.</typeparam>
/// <typeparam name="TOutput">Type of the data produced by the subject.</typeparam>
/// <param name="stream">Stream to create.</param>
/// <param name="state">Additional metadata to associate with the artifact. Implementations can interpret this value, or ignore it.</param>
/// <param name="token">Token to observe for cancellation of the request.</param>
/// <returns>Task to await the acknowledgement of the creation of the stream, or an exception.</returns>
protected override Task CreateStreamAsyncCore <TInput, TOutput>(IAsyncReactiveQubject <TInput, TOutput> stream, object state, CancellationToken token)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (!TryGetUriFromKnownResource(stream, out Uri uri))
{
throw new InvalidOperationException("Unknown stream object. Could not find a URI identity for the specified stream object. Did you obtain the stream object from CreateAsync or GetStream?");
}
return(_provider.CreateStreamAsync(uri, stream.Expression, state, token));
}
