I use it for my login actions when I'm not using container managed security.
My typical worse case action is:
TheForm theForm = (TheForm) form;
ActionErrors errors = form.validate();
if( errors.isEmpty()) {
errors = weirdValidations( form);
if( errors.isEmpty()) {
TheVo vo = new TheVo();
BeanUtils.copyProperties( vo, theForm);
getTheBusinessObject.doSomething( vo);
} else {
forward = forwardToError( errors);
}
} else {
forward = forwardToError( errors);
}
Now, I don't know about you, but this is much nicer, cleaner and easier to
debug and maintain then having a whole bunch of validation code and copy
code in the action.
I'm not saying that is not nice, but I wouldn't say that it's necessarily
cleaner and easier. A shared utility function written in Javascript for form
validations on the client side would do, without having to create form (Dyna
or not) objects each time. What about the objects when a form is posted?
Does this mean that the form values will be written and in the request
object and it the ActionForm object? Or, when the request is send, it gets
intercepted by Struts which populates a form object? In both case, what you
save with another layer of indirection, you lose in performance, don't you
think?
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