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https://issues.apache.org/jira/browse/SLING-5653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15232120#comment-15232120
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Julian Sedding commented on SLING-5653:
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[~rombert] can you check please if the Object you get in the debugger is the
same as
[TagData#REQUEST_TIME_VALUE|https://docs.oracle.com/javaee/7/api/javax/servlet/jsp/tagext/TagData.html#REQUEST_TIME_VALUE]?
I.e. {{val == TagData.REQUEST_TIME_VALUE}}.
The javadoc for {{TagData.REQUEST_TIME_VALUE}} says:
bq. Distinguished value for an attribute to indicate its value is a
request-time expression (which is not yet available because TagData instances
are used at translation-time).
> 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
> Fix For: Scripting JSP-Taglib 2.2.6
>
> Attachments: 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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