To "clone" a DynaValidatorForm perhaps something like this will work:
LazyDynaBean obj = new LazyDynaBean(); // create a lazy dyna bean
BeanUtils.copyProperties(obj, dyForm); // save your form properties
session.setAttribute("saved.obj", obj);
...
LazyDynaBean obj = session.getAttribute("saved.obj");
BeanUtils.copyProperties(dyForm, obj); // restore your form properties
-----Original Message-----
From: Christopher Schultz [mailto:[EMAIL PROTECTED]
Sent: Tuesday, 31 October 2006 11:33 AM
To: Struts Users Mailing List
Subject: Re: Rolling back form changes
All,
> Now I just need to figure out how to copy one of these things. It
> looks like "getMap" might be my best option. Any reason why this
> might be a bad idea? 'cause this class is not clonable, and it
> doesn't have a copy constructor, so this looks like the only
> possibility.
To answer my own question, cloning a DynaActionForm (of which
DynaValidatorForm is a subclass), the following unholy incantation is
necessary:
ModuleConfig mc = mapping.getModuleConfig();
FormBeanConfig fbc = mc.findFormBeanConfig(mapping.getName());
DynaActionForm clonedForm
= (DynaActionForm)fbc.createActionForm(super.getServlet());
for(Iterator i=form.getMap().entrySet().iterator(); i.hasNext();
)
{
Map.Entry entry = (Map.Entry)i.next();
clonedForm.set((String)entry.getKey(), entry.getValue());
}
I tried simply instantiating a new DynaValidatorForm object and then
running the loop shown above. Apparently, that doesn't initialize the
form bean properly, and you get a NPE when calling set(). Calling
"initialize" or "reset" on the bean also doesn't work: initialize()
actually bombs with the same NPE as set() does, and reset() just doesn't
do the trick.
I'd love to hear any other ideas, but for now, this technique works and
I couldn't make it work another way.
-chris
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