Do you want to go now
-----Original Message-----
From: Michael McGrady [mailto:[EMAIL PROTECTED]
Sent: Friday, August 06, 2004 2:26 PM
To: Struts Users Mailing List
Subject: Re: GOING GOING GONE DYNAMIC
I don't know what a "copy of a reference" (which should just be a number
indicating where to find the object) would be, Erik. I do know what a
copy
of an object would be. I am not thinking of changing the reference to a
different object but giving the reference itself a different object.
E.g.
ActionForm method(ActionForm actionForm) {
// set the same reference.
ActionForm af = actionForm;
// now reset the form with that reference
af = DynamicActionFormFactory.getBlankForm(name,type,fields);
return af;
}
This make sense to you?
Michael McGrady
At 02:15 PM 8/6/2004, you wrote:
>Java passes a *copy* of the reference (thus, Java always passes
parameters
>using call-by-value), not the actual reference. So, changing the
passed-in
>reference from within the method to refer to a different object will
not
>cause a change in the reference of the guy who called the method -- his
>reference will still refer to the old (unchanged) object. However,
since
>the passed-in reference refers to the same object as the caller's
>reference, you can modify the object itself via your reference and the
>caller will see the changes. So you could invoke setParameter, etc., on
>the ActionMapping provided . . .
>
>It's a matter of syntax really, you can still accomplish what you are
>talking about.
>
>Erik
>
>
>
>Michael McGrady wrote:
>
>>At 01:44 PM 8/6/2004, you wrote:
>>
>>>If I understand you correctly...
>>>Same issue.... it's passed into the execute method, and therefore you
>>>can't change it, only it's internals, so you would have to do the
same
>>>thing there.
>>>
>>>I'm talking specifically in the execute method, which is where I
think
>>>you're trying to create the form.
>>
>>
>>I'm perhaps confused, then, Jim. My understanding is that Java never
>>passes more than the reference, so why could we not change the mapping
>>and the form in execute? Why cannot we, in other words, take the
>>reference and reinitialize it to a different ActionForm,
ActionMapping,
>>or whatever?
>>
>>Michael McGrady
>>
>>
>>
>>
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