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 $

                    }
                    value = result;
                }
                else
                {
                    ManageableCollection result = getCollectionByQuery(collectionClass, fkQuery, cds.isLazy());
                    collectionField.set(obj, result);
                    value = result;
                }


                if (prefetchProxies && (m_retrievalTasks != null)

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        //obtain current ODMG transaction
        Transaction tx = TxManagerFactory.instance().getTransaction();
        // create PBCapsule
        PBCapsule capsule = null;
        ManageableCollection result = null;


        try
        {
            capsule = new PBCapsule(pbKey, 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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            OQLQuery query = odmg.newOQLQuery();
            String sql = "select aPerson.firstname, aPerson.lastname from " + org.apache.ojb.broker.Person.class.getName();
            query.create(sql);


            ManageableCollection result = (ManageableCollection) query.execute();


            // Iterator over the restricted articles objects
            java.util.Iterator it = result.ojbIterator();
            int i = 0;
            while (it.hasNext())
            {
                Object[] res = (Object[]) it.next();
                String firstname = (String) res[0];

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        db.open(databaseName, Database.OPEN_READ_WRITE);
        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);
        long start = System.currentTimeMillis();
        ManageableCollection collection = (ManageableCollection) query.execute();
        Iterator iter = collection.ojbIterator();
        int fetchCount = 0;
        while (iter.hasNext())
        {
            fetchCount++;
            PerformanceArticle a = (PerformanceArticle) iter.next();

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        tx.begin();
        OQLQuery query = odmg.newOQLQuery();
        int i = 0;
        query.create("select bidirectionalAssociationObjectA from " + BidirectionalAssociationObjectA.class.getName() + " where pk=$1");
        query.bind("A"+currentTime);
        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();
        while (it.hasNext())
        {
            i++;
            a = (BidirectionalAssociationObjectA) it.next();
            if (a.getRelatedB() == null)
                fail("a should have had a related b");
        }
        if (i > 1)
            fail("should have found only one bidirectionalAssociationObjectA, instead found: " + i);


        query = odmg.newOQLQuery();
        i = 0;
        query.create("select bidirectionalAssociationObjectB from " + BidirectionalAssociationObjectB.class.getName() + " where pk=$1");
        query.bind("B"+currentTime);
        all = (ManageableCollection) query.execute();
        it = all.ojbIterator();
        while (it.hasNext())
        {
            i++;
            b = (BidirectionalAssociationObjectB) it.next();
            if (b.getRelatedA() == null)

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        tx.begin();
        OQLQuery query = odmg.newOQLQuery();
        int i = 0;
        query.create("select bidirectionalAssociationObjectA from " + BidirectionalAssociationObjectA.class.getName() + " where pk=$1");
        query.bind("A"+currentTime);
         ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();
        while (it.hasNext())
        {
            i++;
            it.next();
        }
        if (i > 1)
            fail("should have found only one bidirectionalAssociationObjectA, instead found: " + i);


        query = odmg.newOQLQuery();
        i = 0;
        query.create("select bidirectionalAssociationObjectB from " + BidirectionalAssociationObjectB.class.getName() + " where pk=$1");
        query.bind("B"+currentTime);
        all = (ManageableCollection) query.execute();
        it = all.ojbIterator();
        while (it.hasNext())
        {
            i++;
            it.next();
        }

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        OQLQuery query = odmg.newOQLQuery();
        int i = 0;
        query.create("select bidirectionalAssociationObjectA from " + BidirectionalAssociationObjectA.class.getName());
        Transaction tx = odmg.newTransaction();
        tx.begin();
        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();
        BidirectionalAssociationObjectA temp = null;
        while (it.hasNext())
        {
            temp = (BidirectionalAssociationObjectA) it.next();
            if (temp.getRelatedB() == null)

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        OQLQuery query = odmg.newOQLQuery();
        int i = 0;
        query.create("select bidirectionalAssociationObjectB from " + BidirectionalAssociationObjectB.class.getName());
        Transaction tx = odmg.newTransaction();
        tx.begin();
        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();
        BidirectionalAssociationObjectB temp = null;
        while (it.hasNext())
        {
            temp = (BidirectionalAssociationObjectB) it.next();
            if (temp.getRelatedA() == null)

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        db.open(databaseName, Database.OPEN_READ_WRITE);
        OQLQuery query = odmg.newOQLQuery();
        query.create("select bidirectionalAssociationObjectA from " + BidirectionalAssociationObjectA.class.getName());
        Transaction tx = odmg.newTransaction();
        tx.begin();
        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();


        while (it.hasNext())
        {
            a = (BidirectionalAssociationObjectA)it.next();
            b = a.getRelatedB();

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        db.open(databaseName, Database.OPEN_READ_WRITE);
        OQLQuery query = odmg.newOQLQuery();
        query.create("select bidirectionalAssociationObjectB from " + BidirectionalAssociationObjectB.class.getName());
        Transaction tx = odmg.newTransaction();
        tx.begin();
        ManageableCollection all = (ManageableCollection) query.execute();
        java.util.Iterator it = all.ojbIterator();


        while (it.hasNext())
        {
            b = (BidirectionalAssociationObjectB)it.next();
            a = b.getRelatedA();

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org.apache.ojb.broker.accesslayer.CollectionPrefetcher

org.apache.ojb.broker.accesslayer.MtoNCollectionPrefetcher

org.apache.ojb.broker.core.QueryReferenceBroker

org.apache.ojb.compare.PerformanceODMGTest

org.apache.ojb.odmg.BidirectionalAssociationTest

org.apache.ojb.odmg.ContractVersionEffectivenessOQLTest

org.apache.ojb.odmg.oql.OQLQueryImpl

org.apache.ojb.odmg.PerformanceTest

org.apache.ojb.odmg.ProjectionAttributeTest

org.apache.ojb.odmg.ScrollableQueryResultsTest

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