0 Replies Latest reply on Jan 16, 2011 7:59 AM by Hubert Lyczek

    @PrimaryKeyJoinColumn - exception

    Hubert Lyczek Newbie

      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 createCustomerCore(Customer customer){
                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