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https://issues.apache.org/jira/browse/MYFACES-2621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12850895#action_12850895
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Jakob Korherr commented on MYFACES-2621:
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Looking at all the different ValueExpression wrappers I figured out the 
following:

TagValueExpression - needed for bean validation: created TagValueExpressionUEL
LocationValueExpression - needed for bean validation: created 
LocationValueExpressionUEL
ValueBindingToValueExpression - not needed: only used in ApplicationImpl to 
create a component with a binding
MappedValueExpression, IndexedValueExpression, IteratedValueExpression - not 
needed: only used for c:forEach and bean validation does not work with 
properties of Map, List, array... because they can't be annotated
LiteralValueExpression - not needed: bean validation only works for "real" 
properties of a class

So I'll commit the solution with TagValueExpressionUEL and 
LocationValueExpressionUEL.

> BeanValidation does not work with Unified EL 2.2
> ------------------------------------------------
>
>                 Key: MYFACES-2621
>                 URL: https://issues.apache.org/jira/browse/MYFACES-2621
>             Project: MyFaces Core
>          Issue Type: Bug
>          Components: JSR-314
>    Affects Versions: 2.0.0-beta-3
>         Environment: bean validation 1.0.0.GA, unified el 2.2
>            Reporter: Jakob Korherr
>            Assignee: Jakob Korherr
>
> When using the new Unified EL 2.2, BeanValidation does not work, because 
> _BeanValidatorUELUtils.getUELValueReferenceWrapper() always returns null.
> See also the related thread on the mailing list: 
> http://www.mail-archive.com/us...@myfaces.apache.org/msg55250.html

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