Hey folks,
Hope everyone's fine
Tonight I'd like to start a discussion around two issues ; Richfaces
calendar component and java EL in context.
To help flow of discussion let me first state the context that brought me to
my observations:
I've been around java based web DEV for 4 years now so its a fact that I
came through a lot :)
nowadays I do work with the Seam framework, a powerful persistence-domain
model tool developed by JBoss.
One of its strenght is the variety of contexts where objects of model can be
managed
One special thing is the extensive use of java expression language (EL). For
instance, to access a string resource in a bundle you can do:
#{messages['hello']}. Doing this way is a great approach regarding
internationalization.
Moreover you can use EL almost in every single context (by which I mean JSF,
JAVA, AND properties files)
EXCEPT and this is where I'd like to raise an issue, JAVASCRIPT
In my point of view this is a sad limitation of EL. You see, if we already
allow interpretation of EL through xhtml I seriously think that it should be
interpreted "on the fly" in a JS context (to ease client-side validation
for example)
let me state this by a shor example:
suppose we have :
public Class comp
{
...
public Date aDate=...;
}
and we want to validate client-side if "aDate" is within a given range
If EL was actually interpreted by in JS context I'd just have to do:
<somedateinput ondateChange="javascript:someValidationFCN(#{comp.aDate})"/>
Do you see the issue here or I am missing something?
Second and last issus I'd like to discuss with you folks
Suppose we want to use richFaces calendar component
I can use it I JSF by doing:
<rich:calendar ... ( along with required attributes)
So if I want to be able to restreint the dates within a range there is
; preloadDateRangeBegin
preloadDateRangeEnd attributes
acording to this post :
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4192417
I'M restrained in using a datamodel annotation in my Comp Class, this
forcing my to declare it as a Complete component.
But what if i don't want to ?
According to my view on this issue, I should be able to set the rang myself
by setting just single dates.
Am I right ?
So please fell free two discuss the two precding points as it is ,to my
opinion, worth talking
I wish to hear from you soon :)
Laurent
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