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Posted to dev@tomcat.apache.org by bu...@apache.org on 2013/12/16 19:39:12 UTC

[Bug 55891] New: Tomcat 7 EL Parser does not correctly evaluates nested JSF 2.2 ui:repeat values

https://issues.apache.org/bugzilla/show_bug.cgi?id=55891

            Bug ID: 55891
           Summary: Tomcat 7 EL Parser does not correctly evaluates nested
                    JSF 2.2 ui:repeat values
           Product: Tomcat 7
           Version: 7.0.47
          Hardware: PC
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Jasper
          Assignee: dev@tomcat.apache.org
          Reporter: werdex86@gmail.com

Its seems there is an issue with EL parser in tomcat 7.0.47.
It was traced down by
https://java.net/jira/browse/JAVASERVERFACES-3096

I have attached maven project which works fine on tomcat8-RC5, but fails on
tomcat 7.0.47.

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[Bug 55891] Tomcat 7 EL Parser does not correctly evaluates nested JSF 2.2 ui:repeat values

Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55891

Mark Thomas <ma...@apache.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Mark Thomas <ma...@apache.org> ---
I've tracked this down. There is no Tomcat bug here. You have been bitten by a
difference between EL 2.2 and EL 3.0 (which is why it worked in Tomcat 7 when
you used the EL 3.0 implementation from Glassfish 4).

In EL 2.2 attempting to coerce a null to a Boolean results in Boolean.FALSE.
In EL 3.0 attempting to coerce a null to a Boolean results in null.

In Tomcat 7 the attempts to resolve #{b.checked} returns null which is coerced
to Boolean.FALSE which appears to prevent the 3rd resolution attempt (the one
that works in Tomcat 8).

The multiple resolution attempts still look odd but regardless of whether JSF
is doing the right thing there, Tomcat's EL implementation in Tomcat 7 is
behaving as per the EL 2.2 spec and in Tomcat 8 it is behaving as per the 3.0
spec. See section A.4 of the EL 3.0 spec for the details of this change.

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[Bug 55891] Tomcat 7 EL Parser does not correctly evaluates nested JSF 2.2 ui:repeat values

Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55891

--- Comment #4 from Paul Khodchenkov <we...@gmail.com> ---
Hi Mark,
Thanks for the explanation. Is it safe to use the latest el jar from tomcat 8
in tomcat 7 to solve this issue with JSF 2.2?

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[Bug 55891] Tomcat 7 EL Parser does not correctly evaluates nested JSF 2.2 ui:repeat values

Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55891

Mark Thomas <ma...@apache.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 OS|                            |All

--- Comment #2 from Mark Thomas <ma...@apache.org> ---
Any further pointers you can provide as to what Tomcat is doing wrong? I've
traced through the calls into the EL in Tomcat 7 and Tomcat 8 and the call
patterns are very different (there are more calls in 8 than 7).

There are multiple evaluations of #{b.checked} (which itself looks wrong) in
both 7 and 8. In Tomcat 8, it doesn't return a non-null value until the 3rd
call. In Tomcat 7 that third call is never made.

I'm currently comparing the Tomcat 7 and 8 calls but any pointers would be a
help here.

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[Bug 55891] Tomcat 7 EL Parser does not correctly evaluates nested JSF 2.2 ui:repeat values

Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55891

--- Comment #1 from Paul Khodchenkov <we...@gmail.com> ---
Created attachment 31118
  --> https://issues.apache.org/bugzilla/attachment.cgi?id=31118&action=edit
Maven project

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