[jira] [Commented] (MYFACES-4101) Implement f:importConstants

["Leonardo Uribe (JIRA)" <de...@myfaces.apache.org>]

    [ https://issues.apache.org/jira/browse/MYFACES-4101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15904143#comment-15904143 ] 

Leonardo Uribe commented on MYFACES-4101:
-----------------------------------------

After thinking about this problem and tried some possible solutions, including the one found in Omnifaces (code is ASL 2.0 licensed, so it is compatible with our codebase), I found the solution using a custom ELResolver and a transient map to view scope is the best one.

There was a possible alternative using a custom VariableMapper, but that solution does not work well when EL expressions are created from beans, so it will not work well with the new @ManagedProperty for example. The idea is constants imported with f:importConstants has view scope, so UIImportConstants should be added inside f:metadata, so in that sense it should work as view scope. Please note there is no alternative way to add constants in faces-config.xml or through annotations.

> Implement f:importConstants
> ---------------------------
>
>                 Key: MYFACES-4101
>                 URL: https://issues.apache.org/jira/browse/MYFACES-4101
>             Project: MyFaces Core
>          Issue Type: New Feature
>          Components: JSR-372
>            Reporter: Leonardo Uribe
>            Assignee: Leonardo Uribe
>             Fix For: 2.3.0
>
>
> Implement f:importConstants (See UIImportConstants for details)



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