[jboss-user] [EJB 3.0] - Is Disciminator used in @OneToMany?

[edvedafi]

I have a Entity (A) that has a List of Bservices and one Baccount record.  Bservice and Baccount both inherit from an abstract class B and are both stored in table B.  The code below is how I thought it should work, but it does not.  When I try to deploy it says there is a "broken column mapping a.id of B".  If I change A to have a OneToMany relationship with Baccount it will deploy but then I get this exception in the client when I call a.getBs().

  | javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.WrongClassException: Object with id: ... was not of the specified subclass: bAccount
  | 

In an attempt to figure out what is going on I commented out all the relationship information for Baccount so that A had a set of Bservices, but knew nothing of Baccounts.  In this case I got all the B records (both BService and Baccount) when I called a.getBs().  Does a Join ignore the DiscriminatorValues?  Shouldn't the inheratence take care of not populating Bservice with records that have a different discriminator value?  If so is there any way around this to only load Bservices into bs and Baccounts into bAccount, without writing a query for each and having to execute both queries to load the objects?


  | @Entity
  | @DiscriminatorValue(value="C")
  | public class Bservice extends B implements java.io.Serializable {
  | 
  |     private A a;
  |     
  |     @ManyToOne(cascade=CascadeType.ALL, fetch=FetchType.EAGER)
  |     @JoinColumns( { @JoinColumn(name="LOC", insertable=false, updatable=false),
  |                     @JoinColumn(name="CUST_NO", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC_YEAR", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC_END_DAY", insertable=false, updatable=false) } )
  |     public A getA() {
  |         return a;
  |     }
  | 
  |     public void setA(Aa) {
  |         this.a= a;
  |     }



  | @Entity
  | @DiscriminatorValue(value="A")
  | public class Baccount extends B implements java.io.Serializable {
  | 
  |     private A a;
  |     
  |     @OneToOne(cascade=CascadeType.ALL, fetch=FetchType.EAGER)
  |     @JoinColumns( { @JoinColumn(name="LOC", insertable=false, updatable=false),
  |                     @JoinColumn(name="CUST_NO", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC_YEAR", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC_END_DAY", insertable=false, updatable=false) } )
  |     public Isumcust getIsumcust() {
  |         return isumcust;
  |     }
  |                     
  |     public void setA(A a) {
  |         this.a= a;
  |     }
  | }


  | @Entity
  | @Table(name="A")
  | public class A implements java.io.Serializable {
  | 
  |     @OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER)
  |     @JoinColumns( { @JoinColumn(name="LOC", insertable=false, updatable=false),
  |                     @JoinColumn(name="CUST_NO", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC_YEAR", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC_END_DAY", insertable=false, updatable=false) } )    
  |     public Set<Bservice> getBs()
  |     {
  |        return this.bs;
  |     }
  | 
  |     public void setIsummains( Set<Bservice> bs)
  |     {
  |        this.bs=  bs;
  |     }
  | 
  |     @OneToOne(cascade=CascadeType.ALL, fetch=FetchType.EAGER)
  |     @JoinColumns( { @JoinColumn(name="CUST_NO", referencedColumnName="CUST_NO", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC_END_DAY", referencedColumnName="CYC_END_DAY", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC", referencedColumnName="CYC", insertable=false, updatable=false),
  |                     @JoinColumn(name="CYC_YEAR", referencedColumnName="CYC_YEAR", insertable=false, updatable=false),
  |                     @JoinColumn(name="LOC", referencedColumnName="LOC", insertable=false, updatable=false) } )
  |     public Baccount getBaccount() {
  |         return this.bAccount;
  |     }
  | 
  |     public void setIsummainAccount(Baccount bAccount) {
  |         this.bAccount = bAccount;
  |     }
  | 
  | }
  | 



View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3962597#3962597

Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3962597