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From "Henri Yandell (JIRA)" <j...@apache.org>
Subject [jira] Updated: (EL-11) [el] VariableResolverImpl is ignorant of the implicit variables 'request' and 'response'
Date Mon, 20 Aug 2007 13:53:31 GMT

     [ https://issues.apache.org/jira/browse/EL-11?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Henri Yandell updated EL-11:
----------------------------

    Fix Version/s: 1.1

> [el] VariableResolverImpl is ignorant of the implicit variables 'request' and 'response'
> ----------------------------------------------------------------------------------------
>
>                 Key: EL-11
>                 URL: https://issues.apache.org/jira/browse/EL-11
>             Project: Commons EL
>          Issue Type: Bug
>    Affects Versions: Nightly Builds
>         Environment: Operating System: other
> Platform: Other
>            Reporter: David Bullock
>             Fix For: 1.1
>
>         Attachments: EL-11.patch
>
>
> I refer you to JSP.8.8 of the JSP 2.0 FR spec (and also of the JSP 2.1 draft),
> where INSTEAD OF the implicit 'pageContext' object, there are meant to be
> 'request' and 'response' implicit objects.
> This isn't working for me with tag files produced by some version of Jasper/EL
> embedded in Sun Java System Application Server 8 (specifically, when I invoke a
> function like '${f:myFunction(request)}' from a tag file, a null pointer is
> passed to the function).  From a fairly quick read of the current source, it
> would appear that the call-stack initiated by
> org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(...) ultimately
> defers to org.apache.commons.el.VariableResolverImpl to discover implicit
> objects used in an expression.
> And VariableResolverImpl simply doesn't know about 'request' and 'response'. 
> Notice also that -- when invoked in the context of a Tag file -- it  *shouldn't*
> know about 'pageContext' either.
> http://cvs.apache.org/viewcvs.cgi/jakarta-commons/el/src/java/org/apache/commons/el/VariableResolverImpl.java?rev=1.3&view=markup
> As to whether the Jasper crowd are using Commons EL correctly or not, I'm not to
> judge, but it does seem to me that the EL layer should get the heads up first.
> have fun,
> David.
> My own keywords:  Jasper EL tag file tagfile implicit variable variables request
> response pageContext NullPointerException JSP expression evaluate null

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