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https://issues.apache.org/jira/browse/VELOCITY-553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15376487#comment-15376487
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Claude Brisson commented on VELOCITY-553:
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I agree, the quiet references should never trigger an invalid reference event.
> Posibility to configure ReportInvalidReferences to don't report report
> variables,properties and method which exist, but only have null value
> --------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: VELOCITY-553
> URL: https://issues.apache.org/jira/browse/VELOCITY-553
> Project: Velocity
> Issue Type: Improvement
> Components: Engine
> Affects Versions: 1.5
> Environment: any
> Reporter: Tomáš Procházka
> Fix For: 2.x
>
> Attachments: InvalidEventHandlerTestCase.java.patch
>
>
> ReportInvalidReferences has very big imperfection, it report by default all
> variables, properties and method which has null value.
> This may cause many problems for developer.
> I for example need only validate template without any data, only check which
> contain right variables, properties or method (which exist), it's value is
> not important for me.
> I tried use my own ReferenceInsertionEventHandler for replace null value with
> "" (empty String) but Velocity call InvalidReference handler before
> ReferenceInsertionEventHandler.
> I suggest configuration options for this (repor or doesn't report null value)
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