public JsonRpcMessage Deserialize()

in src/StreamJsonRpc/JsonMessageFormatter.cs [402:439]
36 lines of code
11 McCabe index (conditional complexity)

        public JsonRpcMessage Deserialize(JToken json)
        {
            Requires.NotNull(json, nameof(json));

            try
            {
                switch (this.ProtocolVersion.Major)
                {
                    case 1:
                        this.VerifyProtocolCompliance(json["jsonrpc"] is null, json, "\"jsonrpc\" property not expected. Use protocol version 2.0.");
                        this.VerifyProtocolCompliance(json["id"] is not null, json, "\"id\" property missing.");
                        return
                            json["method"] is not null ? this.ReadRequest(json) :
                            json["error"]?.Type == JTokenType.Null ? this.ReadResult(json) :
                            json["error"] is { Type: not JTokenType.Null } ? this.ReadError(json) :
                            throw this.CreateProtocolNonComplianceException(json);
                    case 2:
                        this.VerifyProtocolCompliance(json.Value<string>("jsonrpc") == "2.0", json, $"\"jsonrpc\" property must be set to \"2.0\", or set {nameof(this.ProtocolVersion)} to 1.0 mode.");
                        return
                            json["method"] is not null ? this.ReadRequest(json) :
                            json["result"] is not null ? this.ReadResult(json) :
                            json["error"] is not null ? this.ReadError(json) :
                            throw this.CreateProtocolNonComplianceException(json);
                    default:
                        throw Assumes.NotReachable();
                }
            }
            catch (JsonException exception)
            {
                var serializationException = new JsonSerializationException($"Unable to deserialize {nameof(JsonRpcMessage)}.", exception);
                if (json.GetType().GetTypeInfo().IsSerializable)
                {
                    serializationException.Data[ExceptionDataKey] = json;
                }

                throw serializationException;
            }
        }