I have an entity A
and B extends A
and try to have a soft-delete with joined inheritance strategy.
@Entity
@Inheritance(strategy = InheritanceType.JOINED)
@SQLDelete("UPDATE A SET deleted = 1 WHERE id = ?")
A {
@Id long id;
boolean deleted;
}
@Entity
B extends A {}
It seems that Hibernate properly sets the table A
to deleted = 1
, but also deletes the whole entry from table B
. I would, of course, like to preserve this entry.
Any ideas 开发者_开发知识库on that?
I'm using Hibernate 3.5.5 and annotation-based entity definition. Tried Hibernate 3.6.2 as well.
You'd want to create a DeleteEventListener as such:
public class SoftDeleteEventListener extends DefaultDeleteEventListener {
private static final long serialVersionUID = 1L;
@Override
public void onDelete(DeleteEvent event, Set arg1) throws HibernateException {
Object o = event.getObject();
if (o instanceof SoftDeletable) {
((SoftDeletable)o).setStatusId(1);
EntityPersister persister = event.getSession().getEntityPersister( event.getEntityName(), o);
EntityEntry entityEntry = event.getSession().getPersistenceContext().getEntry(o);
cascadeBeforeDelete(event.getSession(), persister, o, entityEntry, arg1);
cascadeAfterDelete(event.getSession(), persister, o, arg1);
} else {
super.onDelete(event, arg1);
}
}
}
hook it into your persistence.xml like this
<property name = "hibernate.ejb.event.delete" value = "org.something.SoftDeleteEventListener"/>
Also, don't forget to update your cascades in your annotations.
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