Hi all,

I'm attempting to put some base functionality in a base class for all persistent entities. To that end I must be able to call get/setId on all entities so I put an abstract definition of such in the base class:

The type is Serializable because some classes have compound keys.

Then in a subclass:

what this gets me is an error stating that I have to set the id manually, as if it doesn't recognize the generation strategy. I've previously defined all annotations on the subclass, and gotten errors indicating that hibernate is trying to do an insert with the ID field listed twice (duplicate column).

Has anyone gotten something similar to this to succeed?

Hibernate: 3.5.5 Final in JPA 'mode'
Database: Oracle 10g
Java: 6

in the code i see missed sequence name and @Id should be moved in subclass


i'd better refactor with generics:

public interface Entity<ID extends Serializable> {
ID getId();
void setId(ID id);
}

public class User implements Entity<Long> {

@Id
public Long id;

}


compound keys should be moved to separate class that is Serializable.

public class UserLogRecord implements Entity<UserLogRecord.Id>, Serializable {

public Id getId() {
return id;
}

public void setId(Id id) {
this.id = id;
}

public class Id implements Serializable {
}
......
}