Examples of org.apache.ojb.broker.ManageableCollection

org.apache.ojb.broker.ManageableCollection
OJB can handle java.util.Collection as well as user defined collection classes as collection attributes in persistent classes. In order to collaborate with the OJB mechanisms these collection must provide a minimum protocol as defined by this interface ManageableCollection. The methods have a prefix "ojb" that indicates that these methods are "technical" methods, required by OJB and not to be used in business code. @author Thomas Mahler @version $Id: ManageableCollection.java,v 1.7.2.1 2005/12/21 22:22:08 tomdz Exp $


        //obtain current ODMG transaction
        TransactionImpl tx = odmg.getTxManager().getTransaction();
        // create PBCapsule
        PBCapsule capsule = null;
        ManageableCollection result = null;


        try
        {
            capsule = new PBCapsule(odmg.getCurrentPBKey(), tx);
            PersistenceBroker broker = capsule.getBroker();


            // ask the broker to perfom the query.
            // the concrete result type is configurable


            if (!(query instanceof ReportQuery))
            {
                result = broker.getCollectionByQuery(this.getCollectionClass(), query);
                performLockingIfRequired(tx, broker, result);
            }
            else
            {
                Iterator iter = null;
                result = new ManageableArrayList();
                iter = broker.getReportQueryIteratorByQuery(query);
                try
                {
                    while (iter.hasNext())
                    {
                        Object[] res = (Object[]) iter.next();


                        if (res.length == 1)
                        {
                            if (res[0] != null) // skip null values
                            {
                                result.ojbAdd(res[0]);
                            }
                        }
                        else
                        {
                            // skip null tuples
                            for (int i = 0; i < res.length; i++)
                            {
                                if (res[i] != null)
                                {
                                    result.ojbAdd(res);
                                    break;
                                }
                            }
                        }
                    }

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                    Array.set(result, j, list.get(j));
                }
            }
            else
            {
                ManageableCollection col = createCollection(cds, collectionClass);
                for (Iterator it2 = list.iterator(); it2.hasNext();)
                {
                    col.ojbAdd(it2.next());
                }
                result = col;
            }


            Object value = field.get(owner);

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     * @return The collection object
     */
    protected ManageableCollection createCollection(CollectionDescriptor desc, Class collectionClass)
    {
        Class                fieldType = desc.getPersistentField().getType();
        ManageableCollection col;


        if (collectionClass == null)
        {
            if (ManageableCollection.class.isAssignableFrom(fieldType))
            {

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        OQLQuery query = odmg.newOQLQuery();
        String sql = "select allArticles from " + PerformanceArticle.class.getName()
                + " where articleId between " + new Integer(offsetId) + " and "
                + new Integer(offsetId + articleCount);
        query.create(sql);
        ManageableCollection collection = (ManageableCollection) query.execute();
        Iterator iter = collection.ojbIterator();
        int fetchCount = 0;
        while(iter.hasNext())
        {
            fetchCount++;
            iter.next();

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        query.bind(new Timestamp(System.currentTimeMillis() - 5000)); // a while ago (effValue3 > $3)
        query.bind(new Integer(20)); // effValue2 <= $4
        query.bind(new Timestamp(System.currentTimeMillis() + 5000)); // a while from now (effValue3<$5)
        query.bind(new Integer(5)); // version.contract.relatedToContract.relatedValue2=$6


        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();
        /**
         * make sure we got
         */
        int i = 0;
        while (it.hasNext())

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        query.bind("effValue1.testComplexOQL"); // effValue1 = $2
        query.bind(new Timestamp(System.currentTimeMillis() - 5000)); // a while ago (effValue3 > $3)
        query.bind(new Integer(20)); // effValue2 <= $4
        query.bind(new Timestamp(System.currentTimeMillis() + 5000)); // a while from now (effValue3<$5)


        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();
        /**
         * make sure we got
         */
        int i = 0;
        while (it.hasNext())

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        createData(database, odmg);
        OQLQuery query = odmg.newOQLQuery();
        int i = 0;
        query.create("select effectiveness from " + Effectiveness.class.getName() + " where version.versionValue1=$1");
        query.bind("versionvalue1");
        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();
        Effectiveness temp = null;
        while (it.hasNext())
        {
            temp = (Effectiveness) it.next();
            if (!temp.getVersion().getVersionValue1().equals("versionvalue1"))

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  public void testGetEmbeddedObject() throws Exception
    {
        createData(database, odmg);
        OQLQuery query = odmg.newOQLQuery();
        query.create("select effectiveness.version from " + Effectiveness.class.getName() + " where is_defined(effectiveness.version.versionValue1)");
        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();
        while (it.hasNext())
        {
            assertTrue("Selected item is Version", (it.next() instanceof Version));
        }


        query.create("select effectiveness.version.contract from " + Effectiveness.class.getName() + " where is_defined(effectiveness.version.versionValue1)");
        all = (ManageableCollection) query.execute();
        it = all.ojbIterator();
        while (it.hasNext())
        {
            assertTrue("Selected item is Contract", (it.next() instanceof Contract));
        }
    }

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        createData(database, odmg);
        OQLQuery query = odmg.newOQLQuery();
        int i = 0;
        query.create("select effectiveness from " + Effectiveness.class.getName() + " where version.contract.contractValue1=$1");
        query.bind("contractvalue1");
        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();
        Effectiveness temp = null;
        while (it.hasNext())
        {
            temp = (Effectiveness) it.next();
            if (!temp.getVersion().getContract().getContractValue1().equals("contractvalue1"))

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    {
        createData(database, odmg);
        OQLQuery query = odmg.newOQLQuery();
        int i = 0;
        query.create("select effectiveness from " + Effectiveness.class.getName());
        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();
        while (it.hasNext())
        {
            it.next();
            i++;
        }

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