[hibernate-issues] [Hibernate-JIRA] Commented: (HV-438) Call to TraversableResolver.isReachable() threw an exception

[Hardy Ferentschik (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HV-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=40133#action_40133 ] 

Hardy Ferentschik commented on HV-438:
--------------------------------------

Where you able to narrow down or resolve this issue?

> Call to TraversableResolver.isReachable() threw an exception
> ------------------------------------------------------------
>
>                 Key: HV-438
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HV-438
>             Project: Hibernate Validator
>          Issue Type: Bug
>          Components: engine
>    Affects Versions: 4.1.0.Final, 4.2.0.Beta1
>         Environment: hibernate 3.6.1.Final and hibernate validator 4.1.0.Final, GlassFish Server Open Source Edition 3.0.1, Spring 3.0.5 
>            Reporter: Denis Chapligin
>         Attachments: build.xml, hvbug.properties
>
>
> I have a problem with custom class level constraint. When I try to validate a simple entity, like:
> {code}
> @Entity
> @Table(name="users")
> @Unique //My custom constraint
> public class User implements Serializable {
>     @Id
>     @GeneratedValue(strategy = GenerationType.IDENTITY)
>     @Column(name="id")
>     private Integer id;
> }
> {code}
> using a spring validation helper:
> {code}
> User u = new User();
> Errors result = new BindException(u, "User");
> validator.validate(u, result);
> {code}
> It throws a {{NullPointerException}}: 
> {noformat}
> Caused by: java.lang.NullPointerException
>         at java.lang.Class.searchFields(Class.java:2599)
>         at java.lang.Class.getDeclaredField(Class.java:1880)
>         at org.hibernate.ejb.util.PersistenceUtilHelper$MetadataCache.findMember(PersistenceUtilHelper.java:190)
>         at org.hibernate.ejb.util.PersistenceUtilHelper$MetadataCache.getMember(PersistenceUtilHelper.java:178)
>         at org.hibernate.ejb.util.PersistenceUtilHelper.get(PersistenceUtilHelper.java:91)
>         at org.hibernate.ejb.util.PersistenceUtilHelper.isLoadedWithReference(PersistenceUtilHelper.java:83)
>         at org.hibernate.ejb.HibernatePersistence$1.isLoadedWithReference(HibernatePersistence.java:93)
>         at javax.persistence.Persistence$PersistenceUtilImpl.isLoaded(Persistence.java:120)
>         at org.hibernate.validator.engine.resolver.JPATraversableResolver.isReachable(JPATraversableResolver.java:33)
>         at org.hibernate.validator.engine.resolver.DefaultTraversableResolver.isReachable(DefaultTraversableResolver.java:112)
>         at org.hibernate.validator.engine.resolver.SingleThreadCachedTraversableResolver.isReachable(SingleThreadCachedTraversableResolver.java:47)
>         at org.hibernate.validator.engine.ValidatorImpl.isValidationRequired(ValidatorImpl.java:764)
> {noformat}
> Some investigation revealed, that in PersistenceUtil calls the 'property' parameter value is null and in the validator.engine functions 'name' var in value of the first and single entry of propertyPath.nodeList is null too.
> Most interested thing is that when i try validation code, shown above, in JUnit environment, it works well. 
> I've attached a simple webapp, that reproduces the issue. It is too big, to be uploaded here, so i put it to the dropbox: http://dl.dropbox.com/u/17691684/hvbug.tar.gz Initial report was on hibernate forums: https://forum.hibernate.org/viewtopic.php?f=9&t=1009612&start=0

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