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https://issues.apache.org/jira/browse/TAPESTRY-2476?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Howard M. Lewis Ship closed TAPESTRY-2476.
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Resolution: Fixed
Fix Version/s: 5.0.14
> Unhelpful exception messages when a null value is bound to a required
> parameter
> -------------------------------------------------------------------------------
>
> Key: TAPESTRY-2476
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2476
> Project: Tapestry
> Issue Type: Bug
> Components: Core Components
> Affects Versions: 5.0.11
> Environment: Windows XP Service Pack 2, FireFox 2.0.0.14, Eclipse
> 3.3.2, Maven 2.0.9, Run-Jetty-Run, Java 1.6.0_3
> Reporter: Daniel
> Assignee: Howard M. Lewis Ship
> Priority: Minor
> Fix For: 5.0.14
>
>
> Example exception:
> Render queue error in SetupRender[MainPage:tilesetsearch.palette]:
> org.apache.tapestry.ioc.internal.util.TapestryException
> Example tml line:
> <t:palette t:model="keywordModel" t:selected="selectedKeywordIds"
> t:encoder="longEncoder" t:size="5"/>
> Example stack trace: java.lang.NullPointerException
> * org.apache.tapestry.corelib.components...
> Palette.setupRender(Palette.java:379)
> * Palette.setupRender(Palette.java)
> * org.apache.tapestry.internal.structure...
> ComponentPageElementImpl$13$1.run(ComponentPageElementImpl.java:478)
> * ComponentPageElementImpl.invoke(ComponentPageElementImpl.java:880)
> * ComponentPageElementImpl.access$100(ComponentPageElementImpl.java:54)
> * ComponentPageElementImpl$13.render(ComponentPageElementImpl.java:482)
> * org.apache.tapestry.internal.services...
> RenderQueueImpl.run(RenderQueueImpl.java:63)
> * PageRenderQueueImpl.render(PageRenderQueueImpl.java:84)
> This constitutes one example where the t:selected parameter was null. Later I
> got the same exception message with a different stack trace when the same
> parameter was null, but for a different reason.
> Perhaps required parameters should not only be bound, but also null checked.
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