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https://issues.apache.org/jira/browse/NIFI-431?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Payne updated NIFI-431:
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Attachment: 0002-NIFI-431-Updated-validators-to-use-new-isExpressionL.patch
> Update standard validators not to validate if Expression Language is present
> ----------------------------------------------------------------------------
>
> Key: NIFI-431
> URL: https://issues.apache.org/jira/browse/NIFI-431
> Project: Apache NiFi
> Issue Type: Sub-task
> Components: Extensions, Tools and Build
> Reporter: Mark Payne
> Fix For: 0.1.0
>
> Attachments:
> 0002-NIFI-431-Updated-validators-to-use-new-isExpressionL.patch
>
>
> We should not validate input in validators if expression language is used.
> This way, we can avoid having to set property validators to NonEmptyValidator
> and instead use more legit validators like PositiveIntegerValidator. This
> way, if an Expression is used, the validator should indicate that the
> property is valid. Otherwise, it should perform the validation.
> This provides two very big benefits to users:
> * If the user enters an invalid expression such as "${myVar" (without the
> closing brace) this is valid according to the NonEmptyValidator. Assigning a
> more legitimate validator such as a PositiveIntegerValidator will detect that
> this is not an expression and will mark it as invalid.
> * If no expression is used, we can still get the benefits of validation.
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