If the parameter is an IN type anyway, won't the default always be
overridden as soon as the component is used?
Anyway, I looked at the javadocs for finishLoad a while back and don't
understand it...lots of talk of calling via a convenience, but not sure
what it does in the first place (includes a render!?)...maybe I am
interpreting the method name differently than it was intended.
One last question...if using a CUSTOM or OUT direction parameter, do I
still have to create the binding accessors/mutators, etc. or just manually
extract the value from a framework-created binding?
Thanks for all the great help. There is a lot of technology here...I hope
to be able to continue participating.
-C
----- Forwarded by Christian Hall/Technology/Equifax on 09/10/2002 11:23 AM
-----
hlship@attbi.
com To: [EMAIL PROTECTED]
cc:
[EMAIL PROTECTED] (Tapestry Developer)
09/10/2002 Subject: Re: [Tapestry-developer]
connected parameters question
11:02 AM
ParameterManager is the class.
What you are seeing is that the ParameterManager gets
the value of the property (once), so that it can reset
the property back to initial default value after
rendering the component.
Creating a persistent property during the render is a no-
go as well; you'll get an exception that the page
recorder is locked.
You may not be able to use a connected parameter since
you need the value of the binding at other times that
during renderComponnt().
You probably should implement finishLoad() and register
your component as a PageRenderListener and obtain the
parameter value (or null) from pageBeginRender().
--
[EMAIL PROTECTED]
http://tapestry.sf.net
> Where is the code that sets up the connected parameters?
>
> I have a component that has a persistent property for its data. The
> behavior I want is to have an optional parameter for an initial model of
> that data (List). If the parameter is not used, the component creates its
> own List, otherwise, it uses the one bound to it.
>
> The problem is that I do a null check in the property accessor and create
> the list (in the component) only if the property is null. For some
reason,
> getMyProperty in the component is being called before the expression
> (getMyProperty in the wrapping component) is called, so I am never using
> the bound list. I thought looking at the code would shed some light...I
was
> with the understanding that the very first thing that would happen before
> this component rendered was it getting its parameter value from the
> binding.
>
> -C
>
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