Michael Jouravlev wrote:
I suggest to look at your issue from another perspective. Do you
really need the functionality you are asking for? First, a small
clarification. There is no input page for an action, "input" attribute
is poorly named, it should be called "error" or "errorTarget", because
Struts forwards to that location if input data does not validate. Your
request is always sent to action/actionform.
That might be it then... it might just be a matter of having to separate
things out a little more. So let's say I had a page that edits an
entity. I might call this edit_entity.jsp, with an EntityForm, and a
SaveEntityAction. I found things got a little cumbersome in the .jsp,
so I separated it out into a create_entity.jsp and edit_entity.jsp.
These two forms submit to the same action. Obviously, they have a lot
of code in common, but I thought of factoring that out into tags.
Perhaps I should do the same thing to the action class
(CreateEntityAction and UpdateEntityAction rather than all-encompassing
SaveEntityAction; any code duplication can go into base classes or
utility classes).
The other side of this is that I also have a ShowEntityForm and
ShowEntityAction. The action is mapped to /showEntity, and there are
three forward mappings from there. Two are "success"-like forwards
called "create" and "edit", which forward to create_entity.jsp and
edit_entity.jsp. The 3rd one, the "failure" forward's destination would
depend on who called /showEntity in the first place. The ShowEntityForm
has validation, to ensure the given entityId is a number, and the
"failure" forward gets hit when the entityId can't be found in the
database table. While I can break the "failure" out into multiple
forwards, I can't do the same with input.
So the question is, then, do I break up my ShowEntityXxxxx classes into
things like NewEntityAction->create_entity.jsp->CreateEntityAction and
EditEntityAction->edit_entity.jsp->UpdateEntityAction? It's starting to
sound like a lot more classes, but if I'm on the right track, and if
that's how Struts is designed, then perhaps that's the point.
Or I could be completely off my rocker.
:)
- Scott
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