accessing Javabeans properties on a List-implementing object from the EL

[J P <jp...@hotmail.com>]

Hello,
Is it possible using the current JSTL default expression language to access 
Javabeans properties on an object deriving from List?

For example

public class MyObject implements List {

   ... definition of list methods ...

   public String getName();

}

if I had an instance of this class myObject normally I would reference its 
name value in an EL expression as "${myObject.name}"
However it appears that since the Class is a list, the EL is trying to 
coerce 'name' into an integer to do a lookup with get() which is failing.  
Is there a way to indicate to the EL evaluator that it should be explicitly 
going after the JavaBean property rather than trying to look it up in the 
List?  (Unfortunately, I cannot change the design of the MyObject class.)

Thanks
Jason Purcell
jpurcell001@hotmail.com






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Re: accessing Javabeans properties on a List-implementing object from the EL

[Shawn Bayern <ba...@essentially.net>]

On Tue, 28 May 2002, J P wrote:

> Is it possible using the current JSTL default expression language

Just to make sure it's clear, there is only one JSTL Expression
Language.  In the past, we provided a few for experimentation, with one
being the default.  In JSTL 1.0, there is a single expression language and
no option of pluggability.  Books and other materials that suggest this
are incorrect or out of date.

> to access Javabeans properties on an object deriving from List?
> 
> For example
> 
> public class MyObject implements List {
> 
>    ... definition of list methods ...
> 
>    public String getName();
> 
> }

No, the object's nature as a List occludes its JavaBean properties.  You
can wrap the object in another object that has a getList() method along
with other accessors that retrieve the object's properties directly.

-- 
Shawn Bayern
"JSP Standard Tag Library"   http://www.jstlbook.com
(coming in July 2002 from Manning Publications)


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