Amazon.SimpleNotificationService.Util.Message.ParseMessage C# (CSharp) Method

        public static Message ParseMessage(string messageText)
        {
            var message = new Message();

            var jsonData = JsonMapper.ToObject(messageText);

            Func<string, string> extractField = ((fieldName) =>
                {
                    if (jsonData[fieldName] != null && jsonData[fieldName].IsString)
                        return (string)jsonData[fieldName];
                    return null;
                });

            message.MessageId = extractField("MessageId");
            message.MessageText = extractField("Message");
            message.Signature = extractField("Signature");
            message.SignatureVersion = extractField("SignatureVersion");
            message.SigningCertURL = ValidateCertUrl(extractField("SigningCertURL"));
            message.SubscribeURL = extractField("SubscribeURL");
            message.Subject = extractField("Subject");
            message.TimestampString = extractField("Timestamp");
            message.Token = extractField("Token");
            message.TopicArn = extractField("TopicArn");
            message.Type = extractField("Type");
            message.UnsubscribeURL = extractField("UnsubscribeURL");

            return message;
        }