private object Invoke(string method, Dictionary <string, string> arguments, out Type modelType, out RenderMethod renderMethod)
{
var notFoundException = new MiddlewareException("No such method.");
var methodInfo = _Instance.GetType().GetMethod(method, BindingFlags.Instance | BindingFlags.Public);
if (methodInfo == null)
{
throw notFoundException;
}
var attribute = methodInfo.GetCustomAttribute <ControllerAttribute>();
if (attribute == null)
{
throw notFoundException;
}
renderMethod = attribute.RenderMethod;
var parameters = methodInfo.GetParameters();
var invokeParameters = new List <object>();
foreach (var parameter in parameters)
{
string argument;
object convertedParameter;
var type = parameter.ParameterType;
bool isNullable = type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable <>);
if (arguments.TryGetValue(parameter.Name, out argument))
{
if (isNullable)
{
type = type.GenericTypeArguments.First();
}
convertedParameter = Convert.ChangeType(argument, type);
}
else
{
if (type == typeof(string) || isNullable)
{
convertedParameter = null;
}
else
{
string message = string.Format("Parameter \"{0}\" has not been specified.", parameter.Name);
throw new MiddlewareException(message);
}
}
invokeParameters.Add(convertedParameter);
}
var output = methodInfo.Invoke(_Instance, invokeParameters.ToArray());
modelType = methodInfo.ReturnType;
return(output);
}
