Examples of org.apache.openjpa.persistence.OpenJPAEntityManager

org.apache.openjpa.persistence.OpenJPAEntityManager
Interface implemented by OpenJPA entity managers. @since 0.4.0 @author Abe White @published

            fail("Eager result iterator obtained from Query should return "
                + "true for hasNext() after em has been closed");
    }


    public void testQueryResultIsList() {
        OpenJPAEntityManager em =
            (OpenJPAEntityManager) currentEntityManager();
        startTx(em);


        String query = "SELECT o FROM RuntimeTest1 o";


        Collection c = (Collection) em.createQuery(query).getResultList();
        if (!(c instanceof List))
            fail("Collection (" + c.getClass() + ") should have "
                + "been a List instance");


        endTx(em);

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        endTx(em);
        endEm(em);
    }


    public void testQueryResultSizeIsCorrect() {
        OpenJPAEntityManager em =
            (OpenJPAEntityManager) currentEntityManager();
        startTx(em);


        em.persist(new RuntimeTest2("TestQueryResults1", 10));
        endTx(em);
        endEm(em);


        em = (OpenJPAEntityManager) currentEntityManager();
        startTx(em);


        String query =
            "SELECT r FROM RuntimeTest2 r WHERE r.stringField = \'TestQueryResults1\'";
        List c = em.createQuery(query).getResultList();


        assertEquals(1, c.size());
        endTx(em);
        endEm(em);
    }

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        endTx(em);
        endEm(em);
    }


    public void testExtentIteratorsReturnFalseForClosedExtent() {
        OpenJPAEntityManager em =
            (OpenJPAEntityManager) currentEntityManager();
        startTx(em);
        Extent extent = em.createExtent(RuntimeTest1.class, true);


        Iterator i = extent.iterator();
        if (!(i.hasNext()))
            fail("Iterator should have had next()");
        extent.closeAll();

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        endTx(em);
        endEm(em);
    }


    public void testExtentIteratorsThrowExceptionForClosedExtent() {
        OpenJPAEntityManager em =
            (OpenJPAEntityManager) currentEntityManager();
        startTx(em);


        Extent extent = em.createExtent(RuntimeTest1.class, true);


        Iterator i = extent.iterator();
        if (!(i.hasNext()))
            fail("Iterator should have had next()");
        extent.closeAll();

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        endTx(em);
        endEm(em);
    }


    public void testExtentIteratorsReturnFalseForClosedem() {
        OpenJPAEntityManager em =
            (OpenJPAEntityManager) currentEntityManager();
        startTx(em);


        Extent extent = em.createExtent(RuntimeTest1.class, true);
        Iterator i = extent.iterator();
        if (!(i.hasNext()))
            fail("Iterator should have had next()");
        endTx(em);
        endEm(em);

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            fail("Iterator obtained from Extent should return false "
                + "for hasNext() after em has been closed");
    }


    public void testUniqueReturnsSingleResult() {
        OpenJPAEntityManager em =
            (OpenJPAEntityManager) currentEntityManager();
        startTx(em);


        String query =
            "SELECT DISTINCT r FROM RuntimeTest1 r WHERE r.stringField = \'TestQueryResults1\'";
        Object obj = em.createQuery(query).getSingleResult();


        assertTrue(obj instanceof RuntimeTest1);


        query =
            "SELECT DISTINCT r FROM RuntimeTest1 r WHERE r.stringField = \'xxxx\'";
        OpenJPAQuery q = em.createQuery(query);
        List l = q.getResultList();
        assertNotNull(
            "expecting l to be null since there is no RuntimeTest1 instance with stringfield=xxxx",
            l);

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        endTx(em);
        endEm(em);
    }


    public void testUniqueThrowsExceptionIfMultipleResults() {
        OpenJPAEntityManager em =
            (OpenJPAEntityManager) currentEntityManager();
        startTx(em);
        String query = "SELECT DISTINCT r FROM RuntimeTest1 r";
        OpenJPAQuery q = em.createQuery(query);


        try {
            Object l = q.getSingleResult();
            fail("Unique query matched multiple results.");
        }

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        endTx(em);
        endEm(em);
    }


    public void testImpossibleRangeReturnsEmptyList() {
        OpenJPAEntityManager em =
            (OpenJPAEntityManager) currentEntityManager();
        startTx(em);
        String query = "SELECT r FROM RuntimeTest1 r";
        OpenJPAQuery q = em.createQuery(query);
        q.setFirstResult(2);
        q.setMaxResults(0);


        List results = q.getResultList();

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        endTx(em);
        endEm(em);
    }


    public void testImpossibleUniqueRangeReturnsNull() {
        OpenJPAEntityManager em =
            (OpenJPAEntityManager) currentEntityManager();
        startTx(em);


        OpenJPAQuery q = em.createQuery(
            "SELECT DISTINCT r FROM RuntimeTest1 r WHERE r.stringField = \'TestQueryResults1\'");
        q.setFirstResult(2);
        q.setMaxResults(0);
        assertTrue(
            "resultlist is not null its size is: " + q.getResultList().size(),

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        endTx(em);
        endEm(em);
    }


    public void testSingleResultUniqueRange() {
        OpenJPAEntityManager em =
            (OpenJPAEntityManager) currentEntityManager();
        startTx(em);


        OpenJPAQuery q = em.createQuery(
            "SELECT DISTINCT r FROM RuntimeTest1 r WHERE r.stringField = \'TestQueryResults1\'");
        q.setFirstResult(1);
        q.setMaxResults(1000000);


        assertTrue("resultlist is not empty", (q.getResultList()).isEmpty());

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