[hibernate-issues] [Hibernate-JIRA] Commented: (HV-43) Hibernate Validator could load JPA annotations for validation

[Peter Runge (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HV-43?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=32082#action_32082 ] 

Peter Runge commented on HV-43:
-------------------------------

We are in the same situation - we are using Hibernate as the JPA provider but we also want to run validation sometimes even though we are not persisting to the database - e.g. business validation when user clicks on 'next' button.  Duplicating nullable and length constraints in both JPA and Hibernate validator annotations was not appealing - another developer not aware of the situation might come in later and change one but forget to change the other.

We got around this by writing our own implementation of AnnotationReader that translates JPA annotations to validator annotations (e.g. @Column with nullable=false -> @NotNull), subclass JavaReflectionManager to use our custom AnnotationReader implementation, and use this custom reflection manager in the constructor of ClassValidator.


> Hibernate Validator could load JPA annotations for validation
> -------------------------------------------------------------
>
>                 Key: HV-43
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HV-43
>             Project: Hibernate Validator
>          Issue Type: Improvement
>    Affects Versions: 3.0.0.ga, 3.0.1
>            Reporter: Leonardo Pinho
>            Priority: Critical
>
> Hibernate Validator could load JPA annotations fields for validation, like at @Column (javax.persistence.Column):
> public class Test  {
>     @Column(name="NAME", length=40, nullable=false)     
>     private String name;
> }
> Otherwise I have to change the code to:
> public class Test  {
>     @NotNull
>     @Length(max=40)
>     @Column(name="NAME", length=40, nullable=false)     
>     private String name;
> }
> And I got a redundant code... :(

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