[hibernate-issues] [Hibernate-JIRA] Commented: (BVAL-237) Expose validated bean via ConstraintValidatorContext

[Emmanuel Bernard (JIRA)]

    [ https://hibernate.onjira.com/browse/BVAL-237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=45724#comment-45724 ] 

Emmanuel Bernard commented on BVAL-237:
---------------------------------------

{quote}bq. My main problem with that is leakage. Forget validateValue, forget reliable validate based on changesets.

I don't understand what you mean with that. Can you elaborate?{quote}

If a constraint validator is relying on the presence of the bean object, it will fail when validateValue is used as no bean instance is there. Assuming we add a changeset API to validate an object based on a set of potential changes. The object will not have the changeset applied to it and the logic using the bean instance my be tricked.

> Expose validated bean via ConstraintValidatorContext
> ----------------------------------------------------
>
>                 Key: BVAL-237
>                 URL: https://hibernate.onjira.com/browse/BVAL-237
>             Project: Bean Validation
>          Issue Type: New Feature
>          Components: spec-general
>    Affects Versions: 1.0 final
>            Reporter: Gunnar Morling
>             Fix For: 1.1
>
>
> In the feedback forum a user [suggested|https://forum.hibernate.org/viewtopic.php?f=26&t=1012111] to expose the currently validated bean via {{javax.validation.ConstraintValidatorContext}}. 
> IMO that's a good addition as it would people allow to create custom cross-field constraints more easily. I'm not sure whether access should be restricted to the current leaf bean or whether also the root bean should be accessible. In the latter case some methods from {{ConstraintViolation}} might just be offered on {{ConstraintValidatorContext}} as well:
> {code:java}
> getConstraintDescriptor()
> getLeafBean()
> getPropertyPath()
> getRootBean()
> getRootBeanClass() 
> {code}
> Another idea would be to have an {{unwrap()}} method on {{ConstraintValidatorContext}} which would allow for BV providers to expose additional functionality. WDYT?

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