Re: GOING GOING GONE DYNAMIC

[Erik Weber]

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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