JSON taglib not interpreting variables

[tkmilbaugh]

No matter if I have page or request scope variables, the taglib will
not print out their values properly. I am using WebSphere 6.1.
If I have these lines:

<json:object>
<json:property name="context" value="${context0}"/>
</json:object>

My output is:

{"context":"${context0}"}

instead of what I expect (context0 holds "foo"):

{"context":"foo"}

[James Wiltshire]

Sounds like EL evaluation isn't being performed by container.
Checkout this similar thread...
http://groups.google.com/group/json-taglib/browse_thread/thread/9b6d169f664ed14e/9c18c0d607078cce?hl=en&lnk=gst&q=el#9c18c0d607078cce

Regards
James Wiltshire

[tkmilbaugh]

On May 28, 1:40 pm, James Wiltshire <jameswiltshir...@gmail.com>
wrote:

> Sounds like EL evaluation isn't being performed by container.

> Checkout this similar thread...http://groups.google.com/group/json-taglib/browse_thread/thread/9b6d1...
>
> Regards
> James Wiltshire
>

But EL evaluation is working for other taglibs, like <c:out value="$
{context0}" />, it works fine in the same page (tested before posting).

[Jeremy Sears]

What version of the servlet spec are you using?  When EL first came out, the tags were responsible for evaluating the EL expressions.  Subsequent implementations of the servlet spec (1.2 I believe) were required to have the container evaluate the EL expressions.
--
Jeremy Sears

[tkmilbaugh]

On May 28, 1:59 pm, Jeremy Sears <json.taglib.Jeremy.Se...@gmail.com>
wrote:

> What version of the servlet spec are you using?  When EL first came out, the
> tags were responsible for evaluating the EL expressions.  Subsequent
> implementations of the servlet spec (1.2 I believe) were required to have
> the container evaluate the EL expressions.
> --
> Jeremy Sears

I am specifying 2.4 in my web.xml:

<web-app id="WebApp_ID" version="2.4">

My server console log shows this:

SRVE0161I: IBM WebSphere Application Server - Web Container.
Copyright IBM Corp. 1998-2006
SRVE0162I: Servlet Specification Level: 2.4
SRVE0163I: Supported JSP Specification Level: 2.0

But my output still doesn't work:

{"context":"${context0}"} <-- printed with

<json:object><json:property name="context" value="${context0}"/></
json:object>

foo <-- printed with <c:out
value="${context0}" />

[James Wiltshire]

What happens when you just use ${context0} within your JSP? (i.e.
without using the <c:out> tag). If EL is enabled and working in the
page, then this should output the value 'foo'.
So...

<c:out value="${context0}/>

${context0}

should output

foo
foo

As Jeremy noted EL evaluation should be carried out by the container
for any web-app using servlet 2.4+ api. The container evaluates any EL
expressions prior to passing the values to any tags for processing -
that clearly isn't happening here.

Try using the full web-app tag declaration using the web-app2.4
schema...

<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

</web-app>

Regards
James Wiltshire

[tkmilbaugh]

On May 28, 3:46 pm, James Wiltshire <jameswiltshir...@gmail.com>
wrote:

> What happens when you just use ${context0} within your JSP? (i.e.
> without using the <c:out> tag). If EL is enabled and working in the
> page, then this should output the value 'foo'.
> So...
>
> <c:out value="${context0}/>
> ${context0}
>
> should output
>
> foo
> foo
>
> As Jeremy noted EL evaluation should be carried out by the container
> for any web-app using servlet 2.4+ api. The container evaluates any EL
> expressions prior to passing the values to any tags for processing -
> that clearly isn't happening here.
>
> Try using the full web-app tag declaration using the web-app2.4
> schema...
>
> <web-app version="2.4"
>       xmlns="http://java.sun.com/xml/ns/j2ee"
>       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

>       xsi:schemaLocation="http://java.sun.com/xml/ns/j2eehttp://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
>
> </web-app>
>
> Regards
> James Wiltshire

My server fails to start when I include those attributes, throwing
dozens of exceptions.