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 Post subject: bidirectional recursive many-to-many association
PostPosted: Sun Mar 20, 2011 7:00 pm 
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Joined: Sun Mar 20, 2011 6:43 pm
Posts: 1
Hi guys,

I need to realize a bidirectional recursive many-to-many association. Here is an excerpt of my model class:
Code:
@Entity
public class Cluster {
   @Id
   @GeneratedValue
   private Long id;
   @ManyToMany
   private Set<Cluster> consistsOf = new HashSet<Cluster>();
   @ManyToMany
   private Set<Cluster> partOf = new HashSet<Cluster>();
}


A cluster can consist of many other clusters and can also be contained in an arbitrary number of parent clusters. I learned that I have to use "mappedBy" in a many-to-many relationship to specify the owning side explicitly. I can't really imagine on which side a foreign key might be in this scenario. Can Hibernate/JPA handle this scenario?

Thanks in advance & kind regards
Matt


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