Examples of org.apache.openjpa.lib.rop.ResultList

org.apache.openjpa.lib.rop.ResultList
List interface that represents a potentially lazy ResultList instantiation. A ResultList will typically be instantiated from a factory, and will use a ResultObjectProvider for obtaining individual object data representations. Depending on the support for scrolling inputs, the list that is returned may use lazy instantiation of the objects, and thus allow very large result sets to be obtained and manipulated. Note that wrapping a ResultList in another Collection will always instantiate the entire set of elements contained in the ResultList. This may not always be desireable, since the list may be very large. @author Marc Prud'hommeaux

        // now that we've executed the query, we can call isAggregate and
        // hasGrouping efficiently
        boolean detach = (_broker.getAutoDetach() &
            AutoDetach.DETACH_NONTXREAD) > 0 && !_broker.isActive();
        boolean lrs = range.lrs && !ex.isAggregate(q) && !ex.hasGrouping(q);
        ResultList res = (!detach && lrs) ? _fc.newResultList(rop)
            : new EagerResultList(rop);


        _resultLists.add(decorateResultList(res));
        return res;
    }

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    public void testRoundtrip() {
        List<String> list = new ArrayList<String>();
        list.add("xxx");
        list.add("yyy");
        ResultList resultList = new ListResultList(list);
        EntityManagerImpl em = (EntityManagerImpl)emf.createEntityManager();
        em.close();
        RuntimeExceptionTranslator trans = PersistenceExceptions.getRollbackTranslator(em);
        DistinctResultList distinctResultList = new DistinctResultList(resultList, trans);
        try {

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    public void testRoundtrip() {
        List<String> list = new ArrayList<String>();
        list.add("xxx");
        list.add("yyy");
        ResultList resultList = new ListResultList(list);
        EntityManagerImpl em = (EntityManagerImpl)emf.createEntityManager();
        em.close();
        RuntimeExceptionTranslator trans = PersistenceExceptions.getRollbackTranslator(em);
        DistinctResultList distinctResultList = new DistinctResultList(resultList, trans);
        try {

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        Query headerQuery = em.createNativeQuery("SELECT MESSAGE_ID, HEADERS_ID FROM MESSAGE_HEADER");
        em.getTransaction().commit();
        
        DelegatingResultList headerNameList = (DelegatingResultList) headerQuery.getResultList();
        ResultList rl = headerNameList.getDelegate();
        for (int i=0; i < rl.size(); i++) {
            Object[] results = (Object[]) rl.get(i);
            Long messageId = (Long) results[0];
            Long headerId = (Long) results[1];
            em.getTransaction().begin();
            Query update = em.createNativeQuery("UPDATE HEADER SET MESSAGE_ID = ? WHERE ID = ?");
            update.setParameter(1, messageId);

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        Query propertyQuery = em.createNativeQuery("SELECT MESSAGE_ID, PROPERTIES_ID FROM MESSAGE_PROPERTY");
        em.getTransaction().commit();


        DelegatingResultList propertyNameList = (DelegatingResultList) propertyQuery.getResultList();
        ResultList rl = propertyNameList.getDelegate();
        for (int i=0; i < rl.size(); i++) {
            Object[] results = (Object[]) rl.get(i);
            Long messageId = (Long) results[0];
            Long propertyId = (Long) results[1];
            em.getTransaction().begin();
            Query update = em.createNativeQuery("UPDATE PROPERTY SET MESSAGE_ID = ? WHERE ID = ?");
            update.setParameter(1, messageId);

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        + "ORDER BY INTFIELD");
        ResultSetResult res = new ResultSetResult(rs,
        store.getConfiguration().getDBDictionaryInstance());
        ResultObjectProvider rop = new GenericResultObjectProvider
        (RawSQL.class, store, null, res);
        ResultList rl = new EagerResultList(rop);
        check(rl, broker);
        rl.close();
        broker.close();
        em.close();
    }

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                // note that we're not loading version info here, so the system
                // will go out and get it after this intial load; kinda neat
            }
        };
        ResultList rl = new EagerResultList(rop);
        check(rl, broker);
        rl.close();
        broker.close();
    }

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        // now that we've executed the query, we can call isAggregate and
        // hasGrouping efficiently
        boolean detach = (_broker.getAutoDetach() &
            AutoDetach.DETACH_NONTXREAD) > 0 && !_broker.isActive();
        boolean lrs = range.lrs && !ex.isAggregate(q) && !ex.hasGrouping(q);
        ResultList res = (!detach && lrs) ? _fc.newResultList(rop)
            : new EagerResultList(rop);


        _resultLists.add(decorateResultList(res));
        return res;
    }

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        // now that we've executed the query, we can call isAggregate and
        // hasGrouping efficiently
        boolean detach = (_broker.getAutoDetach() &
            AutoDetach.DETACH_NONTXREAD) > 0 && !_broker.isActive();
        boolean lrs = range.lrs && !ex.isAggregate(q) && !ex.hasGrouping(q);
        ResultList res = (!detach && lrs) ? _fc.newResultList(rop)
            : new EagerResultList(rop);


        _resultLists.add(decorateResultList(res));
        return res;
    }

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        + "ORDER BY INTFIELD");
        ResultSetResult res = new ResultSetResult(rs,
        store.getConfiguration().getDBDictionaryInstance());
        ResultObjectProvider rop = new GenericResultObjectProvider
        (RawSQL.class, store, null, res);
        ResultList rl = new EagerResultList(rop);
        check(rl, broker);
        rl.close();
        broker.close();
        em.close();
    }

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