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https://issues.apache.org/jira/browse/WICKET-6656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16841109#comment-16841109
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Sven Meier commented on WICKET-6656:
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It's required already:
https://github.com/apache/wicket/blob/4aa4ba735ab2c012e646ac14d863274fcbc59223/wicket-bean-validation/src/main/java/org/apache/wicket/bean/validation/PropertyValidator.java#L195
> JSR 303 - @NotNull validation problems
> ---------------------------------------
>
> Key: WICKET-6656
> URL: https://issues.apache.org/jira/browse/WICKET-6656
> Project: Wicket
> Issue Type: Improvement
> Components: wicket-bean-validation
> Affects Versions: 9.0.0-M1, 8.4.0
> Reporter: Sebastian
> Assignee: Sven Meier
> Priority: Minor
> Fix For: 8.5.0, 9.0.0-M2
>
>
> Hi there,
> we are using JSR 303 validations. But regarding the NotNull validation, the
> behaviour differs from the other validations.
> On a validation-violation the given message key of NotNull isn't used.
> We recognized, that the method FormComponent.validate() contains a condition
> to check if the required flag of a FormComponent is set. If the flag is set
> to true NotNull JSR validations aren't validated.
> On the other hand there is a default validator
> org.apache.wicket.bean.validation.PropertyValidator (wicket-bean-validation)
> which sets the required field to true if there is a NotNull validation added
> to a field.
> If we want to get full JSR 303 support, we need to implement
> INullAcceptingValidator. But this requires that the required field of
> FormComponent will always be false.
> The problem is, that we use the required field beside validation for some
> other functionality in the rendering phase.
> It would be very helpful, if Wicket completly supports JSR 303 without having
> a restriction on the usage of the FormComponent.
> Do you have a suggestion regarding this issue?
>
> Thank you.
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