Alessandro Vincelli wrote:
Ok, I'am trying in other ways,
but I have other problems.
Can you hel me in a correct
...
Identity oid = new Identity(e, broker);
...
b = (Utenti) persistenceManager.getObjectById(oid, false);
...
thanks in advance
To create Identity objects you should use
Identity oid = broker.serviceIdentity().buildIdentity(...)
this method allows to build Identity objects based on a object itself or
on the used PK.
If you want to use JDO-api in production environment I recommend to use
JPOX, because OJB-JDO is only a prototype based on jdori (JDO2.0 will be
supported in OJB2.0).
regards,
Armin
Armin Waibel ha scritto:
Hi Alessandro,
Alessandro Vincelli wrote:
I use this simple code to retrieve row,
but after this code the db sequence of Utenti table is autoincrement.
Why?
Thanks,Ale
//1. Get the PersistenceManager
PersistenceManager persistenceManager =
jdo.getPersistenceManager();
Utenti e = new Utenti();
e.setId_utente(bean.getId_utente());
PersistenceBroker broker =
PersistenceBrokerFactory.defaultPersistenceBroker();
Identity oid = new Identity(e, broker);
When you create an Identity object for a new (not persisted) object, OJB
try to lookup/set a valid PK for the object, thus the sequence will be
incremented (because the PK is null and OJB lookup a valid sequence for
the new object).
regards,
Armin
Utenti b = new Utenti();
// 2. start transaction
persistenceManager.currentTransaction().begin();
// 3. Get the Object based on the primary key
b = (Utenti) persistenceManager.getObjectById(oid, false);
// 4. Copy data to bean
copyData(b, bean);
// 5. End transaction
persistenceManager.currentTransaction().commit();
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