Allright!
Actually, my first languages "are" c++ and pascal.
Why did you ask anyway!?
Thanks again,
ltcmelo
> ATTACHMENT part 9 message/rfc822
> Data: Wed, 11 Aug 2004 14:17:11 -0700
> Para: "Struts Users Mailing List"
> <[EMAIL PROTECTED]>
> De: Michael McGrady <[EMAIL PROTECTED]>
> Assunto: Re: Multiple image tags
>
> You got it, Leandro.
>
> You end up doing with this solution what the
> LookupDispatchAction does with
> less overhead, less of a footprint, and without all
> the coupling to the
> framework. I put the solution on the Struts wiki,
> and a pretty good
> programmer actually suggested using this solution
> and adding it to
> LookupDispatchAction. That really confounded me.
>
> What's your first language? Don't say Java! LOL
>
> Michael
>
> At 01:46 PM 8/11/2004, you wrote:
> >Michael,
> >i think i understand your point now!
> >If my english let get the point correctly, i
> realized
> >that if i have an ordinary Action, and have such
> >method that finds out what was the value of the
> image
> >tag (using your getCommand function) and delegate
> >(probably with an "if") the processing of the
> request
> >to the responsible method, i'll end up doing just
> what
> >DispatchAction and LookupDispatchAction does. This
> way
> >your solution certainly works perfectly.
> >Is that it?
> >
> >Thank you again,
> >ltcmelo
> >
> >
> > > Let me try again on this, Leandro, as much for
> > > myself as for you. The
> > > LookupDIspatchAction, which I don't care for,
> only
> > > gives you one thing: a
> > > promise that the page author will have to use a
> > > particular name for the
> > > parameter name to be used in the Action for
> deciding
> > > which method to
> > > use. That is it. So, somehow the page author
> has
> > > to provide a value for
> > > the parameter name you specify in your
> > > LookupDispatchAction action mapping
> > > xml parameter attribute. Thus, if you use
> > > parameter='method' in your
> > > action mapping xml, then you can know that using
> > > 'method' in your "hidden"
> > > values in the form will work. You can also
> know, of
> > > course, that you then
> > > MUST use the request parameter 'method' in your
> > > form. You can do the same
> > > thing without giving the parameter attribute of
> your
> > > action mapping any
> > > value at all. You merely have to coordinate the
> > > page hidden parameter name
> > > and the parameter name mined in the Action. The
> use
> > > of the parameter
> > > attribute in the action mapping MERELY forces
> the
> > > page author to conform to
> > > your requirements in the Action class, which
> then
> > > becomes the
> > > DispatchAction class or LookupDispatchActino
> class.
> > >
> > > The whole point of using an image tag solution
> is to
> > > (1) get out of a
> > > Struts specific solution to this "age old"
> problem
> > > and to (2) provide a
> > > solution to the need to make a switch in the
> > > processing of an action. The
> > > ".x" and ".y" in the parameter names of an image
> tag
> > > operate just like the
> > > parameter attribute of the action mapping for
> the
> > > LookupDispatchAction and
> > > DispatchAction. The difference is that it is
> not
> > > Struts specific and is a
> > > "worldwide" standard. The code which follows,
> viz.
> > >
> > > public final class ButtonCommand {
> > > private ButtonCommand() {
> > > }
> > > public final static String
> > > getCommand(HttpServletRequest request) {
> > > Enumeration enum =
> request.getParameterNames();
> > > String parameterName = null;
> > > while(enum.hasMoreElements()) {
> > > parameterName =
> (String)enum.nextElement();
> > > if(parameterName.endsWith(".x")) {
> > > return
> > >
>
>parameterName.substring(0,parameterName.indexOf('.'));
> > > }
> > > }
> > > return parameterName;
> > > }
> > > }
> > >
> > > simply does this using image tags instead of
> hidden
> > > parameters in the
> > > form. You can, of course, just copy the method
> > > getCommand into your
> > > processing helper classes in the model.
> > >
> > > Does this ring any bells?
> > >
> > > Michael McGrady
> > >
> > > At 08:09 PM 8/10/2004, you wrote:
> > > >The problem is that both solutions in a higher
> > > level
> > > >focus on getting the parameter and checking it
> out
> > > to
> > > >see its value.
> > > >
> > > >In my case, i got a MyLookupDispatchAction that
> > > >receives all the requests and forwards it to
> the
> > > >specific method. So, there's no meanwhile to
> get
> > > the
> > > >request parameter, check it out and forward to
> some
> > > >method.
> > > >
> > > >UNLESS,
> > > >i use someking of hidden field in the form with
> a
> > > name
> > > >that MyLookupDispatchAction expects:
> > > >
> > > >protected Map getKeyMethodMap(){
> > > > Map map = new HashMap();
> > > > map.put("hidden.field",
> > > "verifyParameterMethod");
> > > >}
> > > >
> > > >And the in the "verifyParameterMethod()", i'd
> use
> > > call
> > > >
> > > >"getCommand(HttpServletRequest request)" to
> check
> > > what
> > > >was the value of the real parameter i want (the
> one
> > > >from the image tag). Finally, i would compare
> this
> > > >value and forward the data to the responsible
> > > method.
> > > >Am i correct?
> > > >
> > > >
> > > >It just seems a little confusing...
> >
> >
> >
> >
> >
> >
>
>_______________________________________________________
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> >
>
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=====
_________________________________
Leandro Terra C. Melo
Eng. de Controle e Automação - UFMG
_______________________________________________________
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