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https://issues.apache.org/jira/browse/OPENJPA-1787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13005251#comment-13005251
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Jeremy Bauer commented on OPENJPA-1787:
---------------------------------------
I tracked down the source of the problem. When merging a new entity, OpenJPA
persists a new "empty" entity, sets (or retrieves) an ID for the new entity,
and then merges in the object passed in. The problem is that the during the
persist of the empty entity, a PRE_PERSIST lifecycle event gets fired, causing
validation to occur. I've found that not only is validation occurring
prematurely, but OpenJPA violates the JPA specification for the PrePersist
callback as well.
<jpa 1.0 & 2.0 spec - section 3.5.2>
For entities to which the merge operation has been applied and causes the
creation of newly managed instances, the PrePersist callback methods will be
invoked for the managed instance after the entity state has been copied to it.
<jpa 1.0 & 2.0 spec - section 3.5.2/>
By adding this simple callback to the Person class, it showed that a PrePersist
callback occurred before the entity was fully populated.
class Person {
...
@PrePersist
public void prePersist() {
System.out.println("PrePersist getName()=" + this.getName());
}
}
Result: PrePersist getName()=null
I think the solution will be to disable this callback for the case where a new
entity is created specifically for the purposes of a merge. Working on a fix...
> Bean validation fails merging a new entity
> ------------------------------------------
>
> Key: OPENJPA-1787
> URL: https://issues.apache.org/jira/browse/OPENJPA-1787
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa, kernel
> Affects Versions: 2.0.1, 2.1.0, 2.2.0
> Reporter: Oliver Ringel
> Assignee: Jeremy Bauer
> Priority: Critical
> Attachments: com.example.TestEmployeeDAO.txt, openjpa-1787.tar,
> testcase-openjpa-1787.tar
>
>
> The bean validation is not working correctly
> If you try to merge a new entity.
> EntityManager em = entityManagerFactory.createEntityManager();
> Person person = new Person();
> person.setName("Oliver"); //
> Employee.name is annotated @NotNull
> person = em.merge(person);
> you get a ConstraintValidationException, although name is set.
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