Hi there
I'm having problems using the classextractor annotation.. so I tried to reproduce the problem in a simple example.
In this example there are 2 entities. The entity Car and the entity vw which extends car. The classextractor class does always return a Car.class.
@Entity
@Inheritance(strategy=InheritanceType.JOINED)
@SequenceGenerator(name = "CarIdGenerator")
@ClassExtractor(TypeExtractor.class)
public class Car implements Serializable {
@Id
@GeneratedValue(generator = "CarIdGenerator")
private long carId;
private String name;
private String descr;
private static final long serialVersionUID = 1L;
public Car() {
super();
}
...
}
@Entity
public class VW extends Car implements Serializable {
private String color;
private static final long serialVersionUID = 1L;
public VW() {
super();
}
...
}
public class TypeExtractor extends ClassExtractor {
@Override
public Class extractClassFromRow(Record databaseRow, Session session) {
return Car.class;
}
}
Here's the code snippet where I create the car instance an persist it to the database.
em.getTransaction().begin();
Car car = new Car();
car.setName("Super Car");
car.setDescr("Fast and Super");
em.persist(car);
em.getTransaction().commit();
[EL Finer]: 2012-10-21 21:04:08.987--ClientSession(1547555875)--Connection(39892115)--Thread(Thread[main,5,main])--begin transaction
[EL Fine]: 2012-10-21 21:04:08.987--ClientSession(1547555875)--Connection(39892115)--Thread(Thread[main,5,main])--INSERT INTO CAR (CARID, DESCR, NAME) VALUES (?, ?, ?)
bind => [1, Fast and Super, Super Car]
[EL Finer]: 2012-10-21 21:04:08.996--ClientSession(1547555875)--Connection(39892115)--Thread(Thread[main,5,main])--commit transaction
[
.. but refreshing the newly created instance returns always an EntityNotFoundException
Exception in thread "main" javax.persistence.EntityNotFoundException: Entity no longer exists in the database: ch.tie.poc.jpa.Car@2b177c9.
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.refresh(EntityManagerImpl.java:963)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.refresh(EntityManagerImpl.java:849)
at ch.tie.poc.jpa.Main.main(Main.java:33)
[EL Finest]: 2012-10-21 22:19:49.994--UnitOfWork(1189942303)--Thread(Thread[main,5,main])--Execute query ReadObjectQuery(referenceClass=Car )
[EL Finest]: 2012-10-21 22:19:49.995--ServerSession(1313157506)--Connection(1456488724)--Thread(Thread[main,5,main])--Connection acquired from connection pool [default].
[EL Fine]: 2012-10-21 22:19:49.995--ServerSession(1313157506)--Connection(1456488724)--Thread(Thread[main,5,main])--SELECT t0.CARID, t0.DESCR, t0.NAME, t1.CARID, t1.COLOR FROM CAR t0, VW t1 WHERE ((t0.CARID = ?) AND (t1.CARID = t0.CARID))
bind => [1]
[EL Finest]: 2012-10-21 22:19:49.998--ServerSession(1313157506)--Connection(1456488724)--Thread(Thread[main,5,main])--Connection released to connection pool [default].
And looking at the log you can see its joining the two tables car an vw. What am I doing wrong? Shouldn't it only select the car table? Hope someone can give me a hint.
Could reproduce this with eclipselink 2.3.3 and 2.4.0.
thanks and regards
cyrill
] 
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