[hibernate-issues] [Hibernate-JIRA] Created: (ANN-814) OneToOne Unidirectional Support

[Rachit (JIRA)]

OneToOne Unidirectional Support
-------------------------------

                 Key: ANN-814
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-814
             Project: Hibernate Annotations
          Issue Type: Bug
    Affects Versions: 3.4.0.GA
         Environment: Oracle 10g, Java 1.5
            Reporter: Rachit
            Priority: Blocker


I tried hard for unidirectional OneToOne mapping as below:

@Entity
@Table(name = "PARTY")
public class Party{
   private Person person;
   private String key;
   @OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL,)
    @PrimaryKeyJoinColumn(name = "PARTY_ID", referencedColumnName = "PERSON_PARTY_ID")
    public Person getPerson() {
        return person;
    }
   
    public void setPerson(Person person) {
        this.person = person;
    }

    @Id
    @GeneratedValue(generator = "system-uuid")
    @GenericGenerator(name = "system-uuid", strategy = "uuid")
    @Column(name = "PARTY_ID", nullable = false)
    public String getKey() {
        return key;
    }
   
    private void setKey(String key) {
        this.key = key;
    }
}


and it is one-to-one mapped to Person as:

@Entity(name = "Person")
@Table(name = "PERSON")
public class Person {

   private String key;
     @Id
     @Column(name = "PERSON_PARTY_ID")
    public String getKey() {
        return key;
    }
   
    public void setKey(String key) {
        this.key = key;
    }
   
}

Now in Person, I deliberately dont have sysUUID as generated as then it generates a unique value for person and the association gets lost. With this mapping hibernate throws the following exception :

Caused by: org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): Person.

I read and saw constrained="true" being used in mapping files, which I couldnt use as there is no attribute like it in OneToOne annotation.

Please help me out on this

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