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https://issues.apache.org/jira/browse/SHIRO-423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633779#comment-13633779
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Les Hazlewood commented on SHIRO-423:
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Totally correct on this - thanks very much for the issue!
> INI ReflectionBuilder should not wrap reference values
> ------------------------------------------------------
>
> Key: SHIRO-423
> URL: https://issues.apache.org/jira/browse/SHIRO-423
> Project: Shiro
> Issue Type: Bug
> Components: Configuration
> Affects Versions: 1.2.1
> Reporter: Maison
>
> When injecting a property whose setter expects say a Set, special handling is
> performed (split string with comma and build a set before injection ; List,
> Map, byte[]... types are also handled with special code).
> But this is performed before references are resolved, thus this does not work
> if myUrlsSetRef is already a Set :
> obj.urlsSet = $myUrlsSetRef
> ReflectionBuilder.applyProperty() builds a Set containing a single element
> $myUrlsSetRef, then resolves $myUrlsSetRef : this wraps the referenced set
> into a new set with 1 element.
> Workaround : create a fake setter with Object argument type.
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