private static bool TryGetCommandName(
IDictionary <string, object> valueSet,
out ServiceCommandName commandName,
out IServiceCommandResponse errorResponse)
{
if (!valueSet.TryGetValue(ParamName.CommandName.ToString(), out object rawValue))
{
errorResponse = ServiceCommandResponse.CreateError(
ServiceCommandName.Unknown,
ServiceErrorInfo.MissingRequiredMessageValue(ParamName.CommandName));
commandName = ServiceCommandName.Unknown;
return(false);
}
if (!Enum.TryParse(rawValue.ToString(), out commandName))
{
errorResponse = ServiceCommandResponse.CreateError(
ServiceCommandName.Unknown,
ServiceErrorInfo.WrongMessageValueType(
ParamName.CommandName,
rawValue.GetType(),
typeof(ServiceCommandName)));
commandName = ServiceCommandName.Unknown;
return(false);
}
errorResponse = null;
return(true);
}
private bool TryConvertEnumValue <T>(ParamName paramName, object rawValue, out T value) where T : struct
{
try
{
value = (T)Enum.Parse(typeof(T), rawValue.ToString());
return(true);
}
catch (Exception e) when(e is ArgumentException || e is OverflowException)
{
LastError = ServiceCommandResponse.CreateError(
CommandName,
ServiceErrorInfo.WrongMessageValueType(paramName, rawValue.GetType(), typeof(T)));
value = default(T);
return(false);
}
}
public string GetStringValue(ParamName paramName)
{
if (!GetRequiredValue(paramName, out object rawValue))
{
return(null);
}
if (rawValue is string value)
{
return(value);
}
LastError = ServiceCommandResponse.CreateError(
CommandName,
ServiceErrorInfo.WrongMessageValueType(paramName, rawValue.GetType(), typeof(string)));
return(null);
}
public int GetIntValue(ParamName paramName)
{
if (!GetRequiredValue(paramName, out object rawValue))
{
return(0);
}
if (rawValue is int value)
{
return(value);
}
LastError = ServiceCommandResponse.CreateError(
CommandName,
ServiceErrorInfo.WrongMessageValueType(paramName, rawValue.GetType(), typeof(int)));
return(0);
}