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https://issues.apache.org/jira/browse/JEXL-58?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12731474#action_12731474
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Henri Biestro edited comment on JEXL-58 at 7/15/09 9:04 AM:
------------------------------------------------------------
Implements the lenient/strict mode where null is considered an error in all
arithmetic operators and when variables are not defined (fixes JEXL-10/JEXL-11).
The "silent" mode means that no JexlException will be thrown but error cases
are logged as warn.
The setSilent/setLenient methods of a JexlEngine allow to tune it according to
error control needs.
When "silent" & "lenient" (not-strict), 0 & null should be indicators of
"default" values so that even in an case of error, something meaningfull can
still be inferred; may be convenient for configurations.
When "silent" & "strict", one should probably consider using null as an error
case - ie, every object manipulated by JEXL should be valued; the ternary
operator, especially the '?:' form can be used to workaround exceptional cases.
Use case could be configuration with no implicit values or defaults.
When "not-silent" & "not-strict", the error control grain is roughly on par
with JEXL 1.0
When "not-silent" & "strict', we obtain the finest error control grain; it is
the closest to Java code - still augmented by "script" capabilities regarding
automated conversions & type matching.
Totally aside, this patch integrates the JEXL-40 fix "public abstract methods
in non public concrete derived class" (recopied newer version of Velocity
method from trunk).
was (Author: henrib):
Implements the lenient/strict mode where null is considered an error in all
arithmetic operators and when variables are not defined (fixes JEXL-10/JEXL-11).
Also integrates JEXL-40 fix.
After the fact, it seems one should always use setSilent() & setLenient() in
conjunction so I'm tempted to merge the 2 concepts in one. Opinions ?
> UnifiedJEXL
> -----------
>
> Key: JEXL-58
> URL: https://issues.apache.org/jira/browse/JEXL-58
> Project: Commons JEXL
> Issue Type: New Feature
> Reporter: Henri Biestro
> Assignee: Rahul Akolkar
> Fix For: 2.0
>
> Attachments: JEXL-58.patch, JEXL-58.patch, JEXL-58.patch,
> JEXL-58.patch
>
>
> An evaluator similar to the unified EL evaluator used in JSP/JSF based on
> JEXL.
> It is intended to be used in configuration modules, XML based frameworks or
> JSP taglibs.
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