Override JoinTable

medeski · **Posted:** Thu Jun 22, 2006 6:15 am

Hi,

I'm wondering if there is a possibilty to override a JoinTable definition comming from a @MappedSuperclass in a way such that I can use different JoinTables for all classes extending the MappedSuperclass (similar to AttributeOverride).

Example:

Code:

@MappedSuperclass
public class SomeSuperClass {
    private List entries = new ArrayList();

   @OneToMany(targetEntity=Entry.class, fetch=FetchType.LAZY)
   @JoinTable(name="tblSuper2Entries", joinColumns={@JoinColumn(name="super_fk")}, inverseJoinColumns={@JoinColumn(name="entry_fk")})
   public List getEntries() {
      return this.entries;
   }
}

Then in some extending classes I would like to use the OneToMany association comming from "SomeSuperClass" with the only difference that I want to use different join tables for each sub-class. Therefore I'm looking for some annotation that allows me to rename the table "tblSuper2Entries" to a name unique for each sub-class.

Is there a way to realise this?

Thanks,

john

dillenbu · **Joined:** Thu Jun 22, 2006 5:19 pm **Posts:** 8

Does redefining the method in the subclass work? i.e.

Code:

@Entity
public class SomeSubclass extends SomeSuperClass {
   @OneToMany(targetEntity=Entry.class, fetch=FetchType.LAZY) 
   @JoinTable(name="tblSubEntries", joinColumns={@JoinColumn(name="super_fk")}, inverseJoinColumns={@JoinColumn(name="entry_fk")}) 
   public List getEntries() { 
      return super.getEntries();
   } 
}

medeski · **Posted:** Tue Jul 04, 2006 8:59 am

Not really, leads to the following error:

Code:

org.hibernate.DuplicateMappingException: Duplicate collection role mapping var.SomeSubClass.entries

Any other possibility?

thx,

john

emmanuel · **Posted:** Fri Jul 07, 2006 9:26 am

you have to mark the super method as @Transient.
Not sure it works though