[jsr-314-open] [Fwd: [NEW] <f:ajax> and <f:validateBean> - consistent wrapping solution needed?]

[Dan Allen]

On Fri, Apr 3, 2009 at 3:15 PM, Dan Allen <dan.j.allen at gmail.com> wrote:

>
>
>>> Dan -
>>>
>>> I think that you are most familiar with the current f:validateBean
>>> implementation.  Assuming that you are okay with the proposal, would you be
>>> willing to take a look at what we do for f:ajax and maybe sync up with Ryan
>>> to discuss what it would take to convert this over to the f:ajax strategy?
>>> The f:ajax approach is fairly simple:
>>>
>>> - When we encounter f:ajax, we create an AjaxBehavior and push it onto a
>>> stack.
>>> - When we encounter a ClientBehaviorHolder component that can accept the
>>> AjaxBehavior instance, we create/configure a new AjaxBehavior instance and
>>> attach it to the ClientBehaviorHolder
>>> - When we reach the end of the f:ajax tag, we pop the AjaxBehavior stack.
>>
>>
> Absolutely. I can tell you that implementation the <f:validateBean> as a
> nested tag was a pain to developer. It's much simpler to use the wrapping
> approach because you know what you have to apply going into the subtree. We
> spent the time on the nested tag approach because we were under the
> impression that it would be more straightforward for the developer. But
> clearly there are implications with that solution that cannot be ignored and
> you are right in wanting to align it with <f:ajax>.
>
> Ryan, let me know if you need a hand.


Btw, if we move forward with this change, then we should absolutely make it
generic so it works with any validator. Another candidate is
<f:validateRequired>...</f:validateRequired>.

-Dan

-- 
Dan Allen
Senior Software Engineer, Red Hat | Author of Seam in Action

http://mojavelinux.com
http://mojavelinux.com/seaminaction
http://in.relation.to/Bloggers/Dan

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