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Date: Fri, 2 Dec 2016 23:30:58 +0000 (UTC)
From: "David Greene (JIRA)" <jira@apache.org>
To: notifications@freemarker.incubator.apache.org
Message-ID: <JIRA.13025143.1480698482000.428533.1480721458593@Atlassian.JIRA>
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References: <JIRA.13025143.1480698482000@Atlassian.JIRA> <JIRA.13025143.1480698482322@arcas>
Subject: [jira] [Commented] (FREEMARKER-42) ?first sequence operator does
 not work for SortedSets
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archived-at: Fri, 02 Dec 2016 23:31:07 -0000


    [ https://issues.apache.org/jira/browse/FREEMARKER-42?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15716854#comment-15716854 ] 

David Greene commented on FREEMARKER-42:
----------------------------------------

That makes sense.  I figured it was something along those lines and the fix might be something like sequence.iterator().next() regardless of underlying type.  I would suspect that it would be just fine (and expected) that a HashSet would have an unpredictable order instead of throwing an exception.

> ?first sequence operator does not work for SortedSets
> -----------------------------------------------------
>
>                 Key: FREEMARKER-42
>                 URL: https://issues.apache.org/jira/browse/FREEMARKER-42
>             Project: Apache Freemarker
>          Issue Type: Bug
>    Affects Versions: 2.3.23
>         Environment: JBoss, Linux, JDK8
>            Reporter: David Greene
>            Priority: Minor
>
> ?first should work for SortedSets given that there's an actual .first() method on the object.
> Offending line of code:
> {code}
> <a href="<@s.url action="index" report=(reportsMenu[key]?first).name />"><@s.text name=key /></a>
> {code}
> Working alternative:
> {code}
> <a href="<@s.url action="index" report=(reportsMenu[key].first()).name />"><@s.text name=key /></a>
> {code}
> Stacktrace:
> {code}
> 10:45:00,549 ERROR [freemarker.runtime] (http-0.0.0.0:8443-1) Error executing FreeMarker template: freemarker.template.TemplateModelException: Underlying collection is not a list, it's java.util.TreeSet
> ----
> FTL stack trace ("~" means nesting-related):
>        	- Failed at: @s.url action="index" report=(reports...  [in template "mx/widgets/modules/reports/menu/headeradminnavmenu.ftl" at line 12, column 18]
>        	- Reached through: @mx inc="menu/headeradminnavmenu"  [in template "mx/macros/widgets.ftl" in macro "moduleHeaderWide" at line 667, column 13]
>        	- Reached through: @_widgets.moduleHeaderWide module="re...  [in template "mx/widgets/modules/reports/header.ftl" at line 1, column 1]
>        	- Reached through: @mx inc="header"  [in template "mx/decorators/default.ftl" at line 14, column 9]
> {code}


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