finishLoad() is invoked from finishLoad(...) [lots of
parameters]. The doc could be improved about when,
exactly, finishLoad() is invoked ... which is strange, I
wonder where that doc is.
finishLoad() is invoked after a component has been
instantiated, and all of its bindings and sub-components
have been created.
Using CUSTOM, you'll be responsible for accessing the
binding as needed, either
a) Invoke getBinding("parameterName") as needed, or
b) Implement getParameterNameBinding() and
setParameterNameBinding()
Once you have the bidning, you can invoke getObject() to
read the value for the parameter, or setObject(...) to
update the parameter to a new value.
I know that easy things should be easy; your case, a
comopnent that stores persistent state or gets state
from a parameter, is not completely easy.
--
[EMAIL PROTECTED]
http://tapestry.sf.net
> 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
> >
> > Protect yourself against identity theft with Equifax Credit Watch. Visit
> > http://www.creditalert.equifax.com.
> >
> > This message contains information from Equifax Inc. which may be
> > confidential and privileged. If you are not an intended recipient,
> please
> > refrain from any disclosure, copying, distribution or use of this
> > information and note that such actions are prohibited. If you have
> > received this transmission in error, please notify by e-mail
> > [EMAIL PROTECTED]
> >
> >
> >
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