Action/Form Design Q

[Michael Thompson]

I've hit a stumbling block and I'm not quite sure how to work around 
it.  I've written struts apps in the past and I've taken the approach of 
putting everything in the ActionForm so that the jsp has a one stop shop 
for all it's display needs.  So where I've hit an issue is when say I 
have jsp A that is rendered with form A.  When user submits data to 
action A, the ActionForm pushed to execute is form A.  What happens when 
I need to forward from action A to jsp B which is rendered with form B?  
I need to populate an ActionForm B to send to jsp B, but I don't have 
one.  Is it "normal" to create a form of a different type in your 
Action?  So essentially the code would look something like:

public void execute(ActionMapping mapping, ActionForm form, 
HttpServletRequest request, HttpServletResponse response)
 throws Exception
{
   FormA inputForm = (FormA)form;
   Result result = doSomeCrunchingOnDataSubmittedViaFormA(inputForm);
  
   FormB outputForm = getInstanceOfFormB(mapping, request);  //this 
would stash in request/session also
   populateFormBWithResults(outputForm, result);

   return mapping.findForward("success");
}
getInstanceOfFormB is a little hazy, but I did notice a method in 
RequestUtils that might help.  Seems like this might be breaking some 
struts abstractions by knowing what form to create etc.

Is this the correct way to approach this or should I think about a 
redesign of my forms and actions?  Thanks in advance!
 --m



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