private bool TryGetArguments(JsonRpcRequest request, MethodSignature method, Span <object?> arguments)
{
Requires.NotNull(request, nameof(request));
Requires.NotNull(method, nameof(method));
Requires.Argument(arguments.Length == method.Parameters.Length, nameof(arguments), "Length must equal number of parameters in method signature.");
// ref and out parameters aren't supported.
if (method.HasOutOrRefParameters)
{
this.AddErrorMessage(string.Format(CultureInfo.CurrentCulture, Resources.MethodHasRefOrOutParameters, method));
return(false);
}
// When there is a CancellationToken parameter, we require that it always be the last parameter.
Span <ParameterInfo> methodParametersExcludingCancellationToken = Utilities.IsRunningOnMono
? method.Parameters.Take(method.TotalParamCountExcludingCancellationToken).ToArray()
: method.Parameters.AsSpan(0, method.TotalParamCountExcludingCancellationToken);
Span <object?> argumentsExcludingCancellationToken = arguments.Slice(0, method.TotalParamCountExcludingCancellationToken);
if (method.HasCancellationTokenParameter)
{
arguments[arguments.Length - 1] = CancellationToken.None;
}
switch (request.TryGetTypedArguments(methodParametersExcludingCancellationToken, argumentsExcludingCancellationToken))
{
case JsonRpcRequest.ArgumentMatchResult.Success:
return(true);
case JsonRpcRequest.ArgumentMatchResult.ParameterArgumentCountMismatch:
string methodParameterCount;
methodParameterCount = string.Format(CultureInfo.CurrentCulture, "{0} - {1}", method.RequiredParamCount, method.TotalParamCountExcludingCancellationToken);
this.AddErrorMessage(string.Format(
CultureInfo.CurrentCulture,
Resources.MethodParameterCountDoesNotMatch,
method,
methodParameterCount,
request.ArgumentCount));
return(false);
case JsonRpcRequest.ArgumentMatchResult.ParameterArgumentTypeMismatch:
this.AddErrorMessage(string.Format(CultureInfo.CurrentCulture, Resources.MethodParametersNotCompatible, method));
return(false);
case JsonRpcRequest.ArgumentMatchResult.MissingArgument:
this.AddErrorMessage(Resources.RequiredArgumentMissing);
return(false);
default:
return(false);
}
}