Examples with PCFKListElementShared org.jpox.samples.one_many.collection.PCFKListElementShared used on opensource projects

Example 1 with PCFKListElementShared

use of org.jpox.samples.one_many.collection.PCFKListElementShared in project tests by datanucleus.

the class RelationshipTest method test1toNUnidirListSharedFK.

/**
 * Test case for 1-N unidirectional relationships using a shared foreign-key (List).
 */
public void test1toNUnidirListSharedFK() throws Exception {
    try {
        PersistenceManager pm = pmf.getPersistenceManager();
        Transaction tx = pm.currentTransaction();
        // Create sample data
        Object holderId = null;
        try {
            tx.begin();
            ListHolder holder = new ListHolder();
            PCFKListElementShared elem1 = new PCFKListElementShared("First");
            PCFKListElementShared elem2 = new PCFKListElementShared("Second");
            PCFKListElementShared elem3 = new PCFKListElementShared("Third");
            holder.getFkListPCShared1().add(elem1);
            holder.getFkListPCShared1().add(elem3);
            holder.getFkListPCShared2().add(elem2);
            pm.makePersistent(holder);
            holderId = JDOHelper.getObjectId(holder);
            tx.commit();
        } catch (Exception e) {
            LOG.error(e);
            fail("Exception thrown while creating data for 1-N unidirectional List with shared foreign-key : " + e.getMessage());
        } finally {
            if (tx.isActive()) {
                tx.rollback();
            }
            pm.close();
        }
        // Retrieve the record and check the data
        pm = pmf.getPersistenceManager();
        tx = pm.currentTransaction();
        try {
            tx.begin();
            ListHolder holder = (ListHolder) pm.getObjectById(holderId);
            List coll1 = holder.getFkListPCShared1();
            List coll2 = holder.getFkListPCShared2();
            assertTrue("Collection 1 should have elements but is null!", coll1 != null);
            assertEquals("Collection 1 has incorrect number of elements", coll1.size(), 2);
            assertTrue("Collection 2 should have elements but is null!", coll2 != null);
            assertEquals("Collection 2 has incorrect number of elements", coll2.size(), 1);
            boolean hasElem1 = false;
            boolean hasElem2 = false;
            boolean hasElem3 = false;
            Iterator iter1 = coll1.iterator();
            while (iter1.hasNext()) {
                PCFKListElementShared elem = (PCFKListElementShared) iter1.next();
                if (elem.getName().equals("First")) {
                    hasElem1 = true;
                } else if (elem.getName().equals("Third")) {
                    hasElem3 = true;
                }
            }
            Iterator iter2 = coll2.iterator();
            while (iter2.hasNext()) {
                PCFKListElementShared elem = (PCFKListElementShared) iter2.next();
                if (elem.getName().equals("Second")) {
                    hasElem2 = true;
                }
            }
            assertTrue("Collection 1 is missing element 1", hasElem1);
            assertTrue("Collection 1 is missing element 3", hasElem3);
            assertTrue("Collection 2 is missing element 2", hasElem2);
            tx.commit();
        } catch (Exception e) {
            LOG.error(e);
            fail("Exception thrown while interrogating data for 1-N unidirectional List with shared foreign-key : " + e.getMessage());
        } finally {
            if (tx.isActive()) {
                tx.rollback();
            }
            pm.close();
        }
    } finally {
        // Clean out our data
        clean(ListHolder.class);
        clean(PCFKListElementShared.class);
    }
}