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https://issues.apache.org/jira/browse/SLING-5653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15232186#comment-15232186
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Julian Sedding commented on SLING-5653:
---------------------------------------
Thanks for your inputs! I'll take over and will make sure to test for the
pitfall Justin has mentioned. Maybe we need to return an empty array of
{{VariableInfo}} from {{AdaptToTEI.getVariableInfo()}} to signal that we don't
know.
Forbidding expressions would be backwards incompatible, so hopefully we can
avoid it.
> adaptTo tag fails when adaptTo parameter is an expression
> ---------------------------------------------------------
>
> Key: SLING-5653
> URL: https://issues.apache.org/jira/browse/SLING-5653
> Project: Sling
> Issue Type: Bug
> Components: Scripting
> Affects Versions: Scripting JSP-Taglib 2.2.4
> Reporter: Robert Munteanu
> Assignee: Julian Sedding
> Fix For: Scripting JSP-Taglib 2.2.6
>
> Attachments: SLING-5653-tentative.patch,
> SLING-5653-unexpected-object.png
>
>
> The following code sample fails:
> {code:java}
> <c:set var="dest" value="org.apache.sling.api.resource.ValueMap"/>
> <sling:adaptTo adaptable="${resource}" adaptTo="${dest}" var="props5"/>
> {code}
> Root cause seems to be
> {noformat}Caused by: java.lang.ClassCastException: java.lang.Object cannot be
> cast to java.lang.String
> at javax.servlet.jsp.tagext.TagData.getAttributeString(TagData.java:138)
> at
> org.apache.sling.scripting.jsp.taglib.tei.AdaptToTEI.getClassName(AdaptToTEI.java:26){noformat}
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