2 Replies Latest reply on Jul 29, 2007 4:43 AM by emailmsgbox

Inheritance of a pojo problem

emailmsgbox Jul 25, 2007 7:02 AM

Hi,

I have the following pojos and SLSB


public class UserBase implements Serializable{

 private String id;
 private String name;

}
public class User extends UserBase implements Serializable{

 private String password;

}

public class UserSLSB implements IUserSLFS {

 public UserBase getUser(String id){...}
 public void updateUser(UserBase userBase ){...}
 public void createUser(User user ){...}

}

The User table hold 3 fields ID,NAME,PASS
How can use UserBase and User as ejb3 entitys without adding an extra field used by at @DiscriminatorColumn

I have tried different annotation setting and can get it to work
I don't really need the UserBase as an entity just as a data oblect

Ideas ?

1. Re: Inheritance of a pojo problem

waynebaylor Jul 25, 2007 9:54 AM (in response to emailmsgbox)
you could try the "table per subclass" inheritance strategy:
@Entity @Inheritance(strategy=InheritanceType.JOINED) public class UserBase{ ... } @Entity public class User extends UserBase{ ... }

this way, there will be a table for UserBase objects and a table for User objects.

OR if you don't want UserBase to be an Entity you can use @MappedSuperclass on UserBase.
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2. Re: Inheritance of a pojo problem

emailmsgbox Jul 29, 2007 4:43 AM (in response to emailmsgbox)

Thanks , its works
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