Comment 1 Tom Ware 2011-06-21 14:30:28 EDT

The WDF testArguments test:

    @Test
    public void testSubclassParameter() {
        EntityManager em = getEnvironment().getEntityManager();
        try {
            Query q = em.createQuery("SELECT e FROM Employee e WHERE e.department=?1");
            q.setParameter(1, new KrassDep("foo"));
            q.getResultList();
        } finally {
            closeEntityManager(em);
        }
    }


Causes accidental instantiation of an inheritance policy for Department.

KrassDepartment is an unmapped subclass of Department, and when we are processing the parameter passed into the query, we look in the hierarchy for the descriptor.

We call session.checkHierarchyForDescriptor().  In the RepeatableWriteUnitOfWork implementation this method calls classDescriptor.getInheritancePolicy() without first checking for inheritance.  This causes the inheritancePolicy to be instantiated accidentally.

This issue results in a number of failures later in the tests.  Failures look like this:

java.lang.NullPointerException
at org.eclipse.persistence.internal.sessions.AbstractRecord.get(AbstractRecord.java:276)
at org.eclipse.persistence.descriptors.InheritancePolicy.classFromRow(InheritancePolicy.java:336)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:492)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:463)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:723)
at org.eclipse.persistence.queries.ReadObjectQuery.registerResultInUnitOfWork(ReadObjectQuery.java:766)
at org.eclipse.persistence.queries.ReadObjectQuery.executeObjectLevelReadQuery(ReadObjectQuery.java:451)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1080)
at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:810)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1040)
at org.eclipse.persistence.queries.ReadObjectQuery.execute(ReadObjectQuery.java:412)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1126)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2842)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1521)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1503)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1463)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.executeQuery(EntityManagerImpl.java:781)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.findInternal(EntityManagerImpl.java:725)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.find(EntityManagerImpl.java:619)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.find(EntityManagerImpl.java:498)
at org.eclipse.persistence.testing.tests.wdf.jpa1.query.TestDeleteQuery.testDeleteEmployeeWithGivenDepartment(TestDeleteQuery.java:168)
at org.eclipse.persistence.testing.framework.wdf.SkipBugzillaTestRunner.runChild(SkipBugzillaTestRunner.java:178)
at org.eclipse.persistence.testing.framework.wdf.SkipBugzillaTestRunner.runChild(SkipBugzillaTestRunner.java:38)
at org.eclipse.persistence.testing.framework.wdf.SkipBugzillaTestRunner.run(SkipBugzillaTestRunner.java:50)

Comment 2 Tom Ware 2011-06-21 14:32:35 EDT

The same issue exists in trunk, but the tests do not fail because the query occurs on an isolated client session.

Comment 3 Tom Ware 2011-06-21 14:53:09 EDT

Created attachment 198357 [details]
Proposed fix

Comment 4 Tom Ware 2011-06-21 15:31:47 EDT

Created attachment 198358 [details]
updated patch

Comment 5 Tom Ware 2011-06-29 13:29:10 EDT

Fixed in trunk, 2.3.1 and 2.2.1

Trunk change has an additional change to DatabaseCall not required in other streams.

Reviewed By Guy Pelletier

Comment 6 Eclipse Webmaster 2022-06-09 10:29:55 EDT

The Eclipselink project has moved to Github: https://github.com/eclipse-ee4j/eclipselink