Re: newbie - DynaActionForm, EJB and easystruts

["Colin Williams" <colin.williams@xxxxxxxxxxxx>]

Agree with those points entirely

----- Original Message ----- 
From: "Lim Hock-Chai" <Lim.Hock-Chai@xxxxxxxxxxxxxxx>
To: <java400-l@xxxxxxxxxxxx>
Sent: Monday, December 06, 2004 5:30 PM
Subject: FW: newbie - DynaActionForm, EJB and easystruts


> below is the main reason that he is against using it:
>
> <Clip from the lesson III>
> NOTE:I've decided now that I really hate DynaActionForms. So, although I
demonstrate their use here, I strongly discourage their use.
> The main reason I am not fond of them is because there are no compile-time
checks when using them. In other words, to manually set a DynaForm field you
do something like: yourDynaForm.set("myProperty", myValue );. Well this will
always compile, but what if "myProperty" really isn't the field name that
you have defined? You won't know until run time.(Creating a Constants class
for your form field names helps, but you could still run into the same
problem if the property in the actual form bean definition was changed, and
it wasn't changed in the corresponding Constants class). Bugs can easily
creep into code that are more difficult to track down using DynaForms. More
than likely you also usually end up having to build a regular form bean
which extends a DynaActionForm because you realize later on that you have to
over-ride the reset method or you may even need some custom validation in
the validate method. So now the only advantage you've gained with your
DynaForm is you didn!
>  't have to create set/get methods. But how difficult is that? Most IDEs
will do that for you anyway. So, save yourself the later headaches and just
use regular ActionForms.
> <Clip from the lesson III>
>
>
> >From you respond, seems like you did not find that to be a big problem.
> -----Original Message-----
> From: java400-l-bounces@xxxxxxxxxxxx
> [mailto:java400-l-bounces@xxxxxxxxxxxx]On Behalf Of Glenn Holmer
> Sent: Friday, December 03, 2004 10:43 AM
> To: Java Programming on and around the iSeries / AS400
> Subject: Re: newbie - DynaActionForm, EJB and easystruts
>
>
> Lim Hock-Chai wrote:
> > I went thru a lesson on this web site
http://www.reumann.net/struts/lesson3.do and the author is not recommending
using DynaActionForm.  Is anybody using this method?  If it does cause
problem as the author described, I will try to avoid this.
>
> I didn't do the lesson, why does he recommend against it? We use
> DynaActionForms all the time.  You only need to code your own
> ActionForm in unusual cases.
>
>
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