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From "Rahul Akolkar" <rahul.akol...@gmail.com>
Subject Re: [DISCUSS] New Expressions Sandbox Project...
Date Fri, 11 Apr 2008 21:01:29 GMT
On Thu, Apr 10, 2008 at 9:38 PM, James Carman
<james@carmanconsulting.com> wrote:
> On Thu, Apr 10, 2008 at 8:28 PM, Rahul Akolkar <rahul.akolkar@gmail.com> wrote:
> >  > The first-class Expression object encapsulates the specifics of the
> >  > implementation (whether it be a String or some Serializable object or
> >  > whatever).  This way, you just code to the commons-expression API
> >  > (getValue/setValue) rather than carrying around some string.  Also,
> >  > the implementations are free to "compile" their expressions so that
> >  > they perform better (the MVEL implementation does this and it smokes
> >  > all of the others in my simple benchmarking, because I can't get OGNL
> >  > to compile its expression without a "root object" from the beginning).
> >  >
> >  <snip/>
> >
> >  Makes sense, its worthwhile to have an opportunity to store compiled forms.
> >
> >  I was just looking at the OGNL API, I'm not sure about the root object either.
> >
>
> I really think being able to encapsulate these ideas is beneficial
> (and makes this stuff more reusable).  Of course, allowing these
> things to be serialized is important too (for web components that need
> to be stored in the HTTP session such as in Wicket for example).
>
<snip/>

Understood :-)


> I pinged Jesse Kuhnert today to ask him about it (the current API).
> He confirmed that it's not currently supported, but I asked if it
> could be.
>
<snap/>

Cool, let us know if you get an update. I think on most occassions the
EL can deduce the root given an expression and the context, so not
having to specify it would be nice.

-Rahul

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