How Can I turn off GeneratedValue programmatically?

[raphaufrj]

Hi Seam experts,

My application uses Seam and JPA with hibernate provider. I have the situation: I need persist my entitie jpa for two ways.

1. The first one, uses sequence strategy, like this:

@GeneratedValue(strategy=GenerationType.SEQUENCE, generator = "SEQ_OS_MATERIAL")

      
2. The seconde one, don't need strategy for id, because that id was filled in the past. So, i would have that remove GeneratedValue annotation.

So, my question is: Is there any way to turn off this annotation? How?

Best Regards,

[raphaufrj]

I solved my problem extending Sequence Gerenator from Hibernate. The workaround works this way.

       
1. In my entity
        @Id
        @GeneratedValue(generator="SEQ_PESQUISA")
        @GenericGenerator(name="SEQ_PESQUISA",                  strategy="br.com.activia.commons.persistence.id.CustomSequenceGenerator",parameters = {@Parameter(name="sequence", value="seq_act_pesquisa")})
        @Column(name="actpesquisaid")

2. custom class generator 

public class CustomSequenceGenerator extends SequenceGenerator {
     
     @Override
     public Serializable generate(SessionImplementor session, Object obj) 
     throws HibernateException {
          System.out.println("CustomSequenceGenerator");
          BaseBean<?> myEntity = (BaseBean<?>)obj;
         //se o id ja foi setado nao precisa gerar da sequence
          if (myEntity.getId()!=null && myEntity.getId() > 0) {
           return myEntity.getId();
         } 
         else {
           return super.generate(session, obj);
         }
     }

}

3. my test case

               Pesquisa p = new Pesquisa();
//               p.setPesquisaId(170200778L);
               
               if (p.getId() != null)
                    em.merge(p);
               else 
                    em.persist(p);
               
               em.flush();