On Fri, 11 Oct 2002, James Cook wrote:
> What is the tie-in between JSP 2.0 and the Expression Language? It
> seems to have been introduced in a "low-power" version in the JSTL 1.0
> spec, but I am reading that it will support function-type calls when
> JSP 2.0 is released?
The JSP 2.0 Proposed Final Draft includes the following enhancements to
the expression language:
- It is now available in template text and the attributes of template XML
tags, as in
Hi there, ${user}.
and
<font color="${color}"> ... </font>
- It lets you define custom functions to be used.
> Is JSP 2.0 going to include a newer version of JSTL, and the JSTL
> upgrade will include a better EL? Or is the EL going to be used in
> broader areas than just the JSTL?
JSTL 1.1 will be a synchronization release of JSTL associated with JSP
2.0.
> Will this new, improved EL support reflection-like function calls, and
> will we be able to:
>
> ${mybean.customer(${page.range} * 2)}
Yes, though the syntax will work differently from what you have
assumed; it will instead look like
${mybean.customer(pageScope.range * 2)}
Note 'pageScope' instead of 'page' (this stays the same between JSTL 1.0
and JSTL 1.1 / JSP 2.0), and the fact that "${}" still refers to an entire
expression, not a single variable reference.
--
Shawn Bayern
"JSTL in Action" http://www.jstlbook.com
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