Re: Discussion: The Form Widget use-when attribute

Posted by Scott Gray-2 on
URL: http://ofbiz.116.s1.nabble.com/Discussion-The-Form-Widget-use-when-attribute-tp201454p201455.html

I don't mind either way, only one question, how does UEL handle  
undefined values e.g. (partyIdFrom == void) would we just do  
(partyIdFrom == null)?

It's also worth mentioning that we never needed to use XML escaping  
for beanshell it was the one that supported the method I suggested for  
UEL.

Regards
Scott

On 5/05/2009, at 4:33 PM, Adrian Crum wrote:

>
> Now that the UEL supports logical operator substitution (http://docs.ofbiz.org/display/OFBTECH/Unified+Expression+Language+(JSR-245)+in+OFBiz#UnifiedExpressionLanguage%28JSR-245%29inOFBiz-OperatorSubstitutions 
> ) we have the ability to eliminate the clumsy XML escaping in the  
> form widget use-when attribute. The problem is, the form widget  
> evaluates the use-when attribute with BeanShell, not UEL.
>
> I would like to change the form widget to use UEL in use-when  
> expression evaluations. The use-when attribute must evaluate to a  
> boolean, and UEL is perfect for that. Plus, expression evaluation  
> using UEL should execute faster than BeanShell.
>
> The potential downside is the chance there is a peculiar use-when  
> expression that BeanShell can evaluate, but UEL can't. Those should  
> be easy to find though.
>
> What do you think?
>
> -Adrian
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