Re: [Springframework-developer] am I missing something

[Colin S. <col...@ex...>]

Well here you're getting into view templating technology.

JSTL simply won't let you do arbitrary method invocations in 
expressions. This is a fundamental limitation you can't get around short 
of switching to another view technology (Velocity or FreeMarker for 
example will let you do method invocations in their expression language. 
In a JSP page you'll have to use a scriptlet instead (ughh!). The new 
JSP 2.1/JSTL also allow you to define accessor methods of some sort. 
It's still quite clunky and way to much work. I've had this argument 
(about how useless JSTL is) a number of times with people, most recently 
here:
http://www.theserverside.com/news/thread.tss?thread_id=33990#171263


Keith Donald wrote:

>Juergen,
>
>I should clarify: I meant from a view template like a .jsp, not a mvc View
>instance.  Basically I have some beans in a flow-scoped application context.
>Because the AC is in flow scope, I can access it like this from view
>resources participating in the flow.  Ideally I'd like to be able to invoke
>arbitrary methods on certain beans, like this:
>
>${transactionContext.transactionCoordinator.amountDeposited}, which would
>translate to: ac.getBean("transactionCoordinator").getAmountDeposited().
>
>Keith
>
>-----Original Message-----
>From: spr...@li...
>[mailto:spr...@li...] On Behalf Of
>Juergen Hoeller
>Sent: Wednesday, June 01, 2005 2:58 PM
>To: spr...@li...
>Subject: Re: [Springframework-developer] am I missing something
>
>Keith,
>
>If you define your View instances as beans (using XmlViewResolver or
>ResourceBundleViewResolver), you can wire them with anything you want, using
>standard Spring bean references.
>
>However, if you're using a UrlBasedViewResolver, this is not available
>because of the different View instantiation model there. You can do
>ApplicationContext lookups in an ApplicationContextAware view, though.
>
>What concretely do you want to pass to a View instance?
>
>Juergen
>
>
>-----Original Message-----
>From: spr...@li...
>[mailto:spr...@li...]On Behalf Of
>Keith Donald
>Sent: Wednesday, June 01, 2005 2:31 AM
>To: spr...@li...
>Subject: [Springframework-developer] am I missing something
>
>
>Is there an easy way to invoke methods on a bean exported in the Spring
>application context from a view?  It'd be quite useful for this app I'm
>building.  I reckon I could just stick the service I want to expose into the
>model but it'd be cool to have the whole context in there in this case..  I
>know we also want this capability in web flow definitions as well.
>
>Keith
>
>
>
>
>
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