@primarykeyjoincolumn for OnetoMany and ManytoOne?

[Karnati Sudhakar]

Hi All,

I just want to know if we can implement OnetoMany and ManytoMany relation ships using @primarykeyJoinColumn.
In EJB in Action OnetoMany and ManytoMany are implemented using @JoinColumn annotation where as OnetoOne is implemented by using both @JoinColumn and @primarykeyJoinColumn annotations.

It would be great if anybody can post the implementation part.

Regards
Sudhakar

[Tomaszz Lewandowski]

As far as relationships are concerned, @PrimaryKeyJoinColumn can only be applied to @OneToOne relationship, as it "joins" two entities by their primary keys. That's why it wouldn't make sence for ManyToXXX relationships (because primary keys are "unique").