Niklas Therning wrote:
> Trustin Lee wrote:
>> On 10/29/07, Niklas Therning <[EMAIL PROTECTED]> wrote:
>>
>>>> Any new idea on event types? :)
>>>>
>>>>
>>> I've been thinking about how one could use the IoEventType enum. One
>>> idea is to change the @Handler annotation into a meta annotation. Other
>>> annotations which have been annotated with @Handler can be used by the
>>> statemachine module to build the StateMachine. Maybe something like:
>>>
>>> @Handler(IoEnumType.class, useNullForWildcard = true)
>>> public interface @MinaHandler {
>>> IoEnumType on() default null
>>> String next()
>>> String in()
>>> }
>>>
>>> The @MinaHandler annotation must have the on, in, next parameters or
>>> StateMachineFactory will complain. StateMachineFactory will have to
>>> look
>>> at all annotations in the handler objects and see if they have been
>>> annotated with @Handler.
>>>
>>
>> Uh... It sounds too complex?
>>
> Yes, I agree, it sounds rather complex. :-)
>>
>>> Alternatively StateMachineFactory takes MinaHandler.class as a
>>> parameter. Maybe that's a better idea?
>>>
>>
>> Could you provide me some example code if StateMachineFactory takes
>> MinaHandler.class as a parameter? Isn't MinaHandler a method
>> annotation? How can I specify an annotation as a parameter?
>>
>>
> I'm not talking about generics, rather a constructor parameter. It
> should be possible to specify MinaHandler.class
> as a constructor argument. An annotation is compiled into a .class
> just like any other class or interface.
>
> It would be cool if one could use a custom @Handler annotation because
> that would make it possible to use enums not only for the events but
> possibly also for the states instead of strings. I'll see if I can
> come up with an example.
>
> /Niklas
>
I've added a new create() method in StateMachineFactory which one can
use to specify alternatives to the Handler and Handlers annotations. The
custom annotations must have the same parameters as the default except
that the on() parameter in the alternative to Handler can use an enum
instead of strings. I haven't yet had the time to make an example which
uses this feature. I'll see if I can find some time later this week.
--
Niklas Therning
www.spamdrain.net
