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https://issues.apache.org/jira/browse/VELOCITY-892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16653111#comment-16653111
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Thomas Mortagne commented on VELOCITY-892:
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bq. because it's painful to have the API evolve

Yeah always a pain. One possibility I guess is having two kind of converters 
and call one after the other but yes never nice to have to support the one you 
don't want people to use anymore.

> Method arguments conversions should be based on Type instead of Class
> ---------------------------------------------------------------------
>
>                 Key: VELOCITY-892
>                 URL: https://issues.apache.org/jira/browse/VELOCITY-892
>             Project: Velocity
>          Issue Type: Improvement
>          Components: Engine
>    Affects Versions: 2.0
>            Reporter: Thomas Mortagne
>            Priority: Major
>             Fix For: 2.0
>
>
> I was happy to see that method arguments conversion has been added to 2.0 so 
> that I can remove the uberspector we have on XWiki side but unfortunately 
> ConversionHandler is limited to classes which is way too restrictive for us 
> (for example if the parameter type is List<String> it won't do the same thing 
> than if the type is List<Integer>).
> Our uberspector can be found on 
> https://github.com/xwiki/xwiki-commons/blob/master/xwiki-commons-core/xwiki-commons-velocity/src/main/java/org/xwiki/velocity/introspection/MethodArgumentsUberspector.java
>  to see what we do exactly.



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