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From "Catalina Wei (JIRA)" <j...@apache.org>
Subject [jira] Created: (OPENJPA-925) Bidirectional OneToOne relation incorrectly set in loadEagerJoin
Date Wed, 18 Feb 2009 06:45:01 GMT
Bidirectional OneToOne relation incorrectly set in loadEagerJoin
----------------------------------------------------------------

                 Key: OPENJPA-925
                 URL: https://issues.apache.org/jira/browse/OPENJPA-925
             Project: OpenJPA
          Issue Type: Bug
    Affects Versions: 1.2.0, 1.2.1, 1.3.0, 2.0.0-M1, 2.0.0
            Reporter: Catalina Wei
            Assignee: Catalina Wei


A test scenario uncovers a bug in eager loading bidirectional OneToOne relation.

  OneOneParent  has a bidirectional OneToOne relation with OneOneChild as annotated as following:

@Entity
public class OneOneParent {
...
    @OneToOne(mappedBy="parent")
    private OneOneChild child;
}

@Entity
public class OneOneChild {
...
    @OneToOne
    private OneOneParent parent;
}

Testcase:

String query = "select c FROM OneOneChild c";
        Query q = em.createQuery(query);
        List list = q.getResultList();

        for (int i = 0; i < list.size(); i++) {
            OneOneChild c = (OneOneChild) list.get(i);
            assertEquals(c, c.getParent().getChild());
        }

We expect c equals c.getParent().getChild(), but instead got assertion failure.

It seems to be a bug introduced in performance improvement work (the related issues: OPENJPA-292
& OPENJPA-744).

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