JPA and Generated Key

Hi guys! Is there a functionality in JPA that allows a user to get the generated key like what you could do in plain old JDBC? Thanks!

The @GeneratedValue annotation which supports four different strategies to generate ids. (e.g. using a sequence)

Thanks! It seems that the generated key cannot be used without commiting a transaction first? I'm trying to insert a record then get the generated key and then update the record. But the record it seems is not being saved. I could make two different transactions and commit each but that would only rollback 1 transaction.

EntityManager em = getEntityManager();

try 
      {
    em.getTransaction().begin();
    em.persist(fixedItem);
 
    //em.getTransaction().commit();
             
          fixedItem = em.merge(fixedItem);
 
          /*Generate the control ID*/
          String controlId = null;
      
          /*Control ID format: <DATE><INVENTORY_TYPE><T><FIXED_INVENTORY_TYPE_ID><S><SUPPLIER_ID><F><INVENTORY_ID>*/
          /*INVENTORY_TYPE: F = fixed, C = Consumable,*/
          int itemTypeId = fixedItem.getFixedItemTypeId().getFixedItemTypeId();
          int supplierId = fixedItem.getSupplierId().getSupplierId();
          int fixedItemId = fixedItem.getFixedItemId();
          
          controlId = DateParser.getCurrentDate("yyyyMMdd") + "T" + itemTypeId + "S" + supplierId + "F" + fixedItemId;      
      
          fixedItem.setControlId(controlId);          
          
          //em.joinTransaction();
          em.persist(fixedItem);
          
          em.getTransaction().commit();
          
          
          //System.out.println("SAVED: " + fixedItem.getFixedItemId() );          
          
    addSuccessMessage("FixedItem was successfully created.");
  } 
      catch (Exception ex)
      {
    try 
          {
      addErrorMessage(ex.getLocalizedMessage());
      em.getTransaction().rollback();
    }
          catch (Exception e)
          {
      addErrorMessage(e.getLocalizedMessage());
    }
  } 
      finally
      {
    em.close();
  }

[ May 23, 2007: Message edited by: Timothy Sam ]

Yes, the transaction must be committed before you can access the generated id.