int ExecuteCommand(CommandDescription command, object optionInstance)
{
// get MethodInfo for the "Run" method
var runMethod = GetRunMethod(command);
// create command and execute it
var commandInstance = m_CommandFactory.CreateCommandInstance(command.ImplementationType);
var result = (int)runMethod.Invoke(commandInstance, new[] { optionInstance });
// call dispose if command implements IDisposable
(commandInstance as IDisposable)?.Dispose();
return result;
}
MethodInfo GetRunMethod(CommandDescription command)
{
var interfaceMapping = command.ImplementationType.GetInterfaceMap(typeof(ICommand<>).MakeGenericType(command.OptionType));
for (int i = 0; i < interfaceMapping.InterfaceMethods.Length; i++)
{
if (interfaceMapping.InterfaceMethods[i].Name == nameof(ICommand<object>.Run))
{
return interfaceMapping.TargetMethods[i];
}
}
throw new ArgumentException($"Could not find Run() method for CommandDescription [{command}]. Make sure the implementation class implements {typeof(ICommand<>).Name}");
}
