[jboss-user] [EJB3] - @PrimaryKeyJoinColumn - exception

[Hubert Lyczek]

Hubert Lyczek [http://community.jboss.org/people/lysy78] created the discussion

"@PrimaryKeyJoinColumn - exception"

To view the discussion, visit: http://community.jboss.org/message/581026#581026

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Hello,

I've dicided to try one-to-one relation using @PrimaryKeyJoinColumn. But i cannot force it to work.

Environment:
- AS: jboss-6.0.0.Final
- java version "1.6.0_23"

Problem description:
I have two entities: Customer, Address. Relation between Customer and address is bidirectional one-to-one. The relation  uses primary keys.
You can see created entity beans below:


@Entity
@Table(name="CUSTOMER")
public class Customer implements Serializable{
  
     @Id
     @Column(name="CUSTOMER_ID", nullable=false)
     @GeneratedValue(strategy=GenerationType.AUTO)
     private Integer customerId;
  
     ...
  
     //bidirectional
     @OneToOne(fetch=FetchType.EAGER, cascade=CascadeType.ALL, optional=true)
     @PrimaryKeyJoinColumn
      private Address address;  
 
     ...
}
 




@Entity
@Table(name="ADDRESS")
public class 
Address implements Serializable{      
     @Id
     @Column(name="ADDRESS_ID", nullable=false)
     @GeneratedValue(generator="foreignGenerator")     @GenericGenerator(
          name="foreignGenerator", strategy="foreign", 
          parameters={@Parameter(name="property", value="customer"
     )})     private Integer addressId;
     
     ...
  
     
     @OneToOne(mappedBy="address", fetch=FetchType.LAZY, optional=false) 
 
      private Customer customer; 
 

     ...
}
 


 
 
  



As you see i'm using @GeneratedValue and @GenericGenerator to be sure that address_id will be the same as customer_id.
Unfortunately that doesn't work.

I tried to run code (from remote client):


Customer customer = new Customer();
...          //set customer fields
 Address address = new Address();
 ...          //set addres fields
customer.setAddress(address);address.setCustomer(customer);

 
 
 
 
databaseManager.createCustomer(customer);     //persist


This is implementation of method createCustomer.


public void 
         entityManager.persist(customer);
} 
 


Unfortunately when i try to persist customer with address i get this exception:


Exception in thread "main" javax.ejb.EJBTransactionRolledbackException: 
org.hibernate.id.IdentifierGenerationException: null id generated for:class hl.test.relations.entity.Address
 CMTTxInterceptor.java:148)
     at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.handleInCallerTx(
     ...
 
 
 
 




I thought that i would get the same id for Address as for Customer. But i got exeption and i don't know why.
Could you guys help me find out where is the reason of the exception and how to fix my code?

Thank you in advance

Hubert
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