What I do here, not very clean but it works,
I have created an annotation called Sequence and then I place it on my bean as
follow
@Sequence(name="TABLE_SEQ") where table_seq is the name of my Oracle sequence.
In my persistent class, I create a new persistent bean when needed with empty
properties. But I set already its id by doing this (pb is my persistent bean):
| StringBuilder sb = new StringBuilder("select ");
| Sequence seqAnnotation =
persistentBeanClass.getAnnotation(Sequence.class);
| if (seqAnnotation != null)
| sb.append(seqAnnotation.name());
|
| sb.append(".nextVal from dual");
|
| Query query = entityManager.createNativeQuery(sb.toString());
| Long id = new Long(((Number)
query.getSingleResult()).longValue());
| pb.setId(id);
|
So your bean has the same id generated by the Oracle sequence, before comit.
Hope this helps
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