using forEach with ArrayList? - bug??

[Liam <st...@hotmail.com>]

Hi

We have been trying unsuccessfully to iterate over an ArrayList object using the JSTL tag forEach.

We think it could be a bug, but then we may be  using it wrong :-). Although we have successfully managed to use forEach for iterating over Collections (which are in a bean).

this is out code snippet

               <%
                  ArrayList classifiers = Classifier.DA.getAll();
                %>
                    <c:forEach var="classifier" items="$classifiers" varStatus="status" >
                        <option>
                          <c:out value="${classifier.name()}"/>
                        </option>
                    </c:forEach>

Any help/advice on this is much appreciated!!!

Thanks

Liam.
com21.com 
Temp. contractor.

Re: using forEach with ArrayList? - bug??

[Paul DuBois <pa...@snake.net>]

At 16:21 +0100 5/14/02, Liam wrote:
>Hi
>
>We have been trying unsuccessfully to iterate over an ArrayList 
>object using the JSTL tag forEach.
>
>We think it could be a bug, but then we may be  using it wrong :-). 
>Although we have successfully managed to use forEach for iterating 
>over Collections (which are in a bean).
>
>this is out code snippet
>
>                <%
>                   ArrayList classifiers = Classifier.DA.getAll();

request.setAttribute ("classifiers", classifiers);

I dunno if that's really the "right" way to do it, but it works for me.
I'd be glad to know if there's an approved way, if this isn't it.

>                 %>
>                     <c:forEach var="classifier" items="$classifiers" 
>varStatus="status" >
>                         <option>
>                           <c:out value="${classifier.name()}"/>
>                         </option>
>                     </c:forEach>
>
>Any help/advice on this is much appreciated!!!
>
>Thanks
>
>Liam.
>com21.com
>Temp. contractor.


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Re: using forEach with ArrayList? - bug??

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

On Tue, 14 May 2002, Liam wrote:

> this is out code snippet
> 
> <%
>   ArrayList classifiers = Classifier.DA.getAll();
>  %>
> <c:forEach var="classifier" items="$classifiers" varStatus="status" >

Two problems:

 - The syntax for expressions is now ${expr}, not $expr.  You need to
   write ${classifiers}.
 - Simply declaring a scripting variable (through your "ArrayList
   classifiers" declaration) isn't enough to make the data accessible
   to a JSP tag.  If you create it manually in a scriptlet, you'll need
   to add it to a scope using pageContext.setAttribute().

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


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