Package org.apache.cayenne

Examples of org.apache.cayenne.Persistent

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     */
    void processDeletedID(Object nodeId) {

        // access object map directly - the method should be called in a synchronized
        // context...
        Persistent object = objectMap.get(nodeId);

        if (object != null) {

            DataObject dataObject = (object instanceof DataObject)
                    ? (DataObject) object
                    : null;

            DataContextDelegate delegate;

            switch (object.getPersistenceState()) {
                case PersistenceState.COMMITTED:
                case PersistenceState.HOLLOW:
                case PersistenceState.DELETED:

                    // consult delegate
                    delegate = context.nonNullDelegate();

                    if (dataObject == null || delegate.shouldProcessDelete(dataObject)) {
                        objectMap.remove(nodeId);
                        changes.remove(nodeId);

                        // setting DataContext to null will also set
                        // state to transient
                        object.setObjectContext(null);

                        if (dataObject != null) {
                            delegate.finishedProcessDelete(dataObject);
                        }
                    }

                    break;

                case PersistenceState.MODIFIED:

                    // consult delegate
                    delegate = context.nonNullDelegate();
                    if (dataObject != null && delegate.shouldProcessDelete(dataObject)) {
                        object.setPersistenceState(PersistenceState.NEW);
                        changes.remove(nodeId);
                        registerNode(nodeId, object);
                        nodeCreated(nodeId);

                        delegate.finishedProcessDelete(dataObject);
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    }

    public void testResolveFaultFailure() {
        DataContext context = createDataContext();

        Persistent o1 = context.localObject(new ObjectId(
                "Artist",
                Artist.ARTIST_ID_PK_COLUMN,
                new Integer(234)), null);

        try {
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        Map modified = null;
        Object eventPostedBy = null;

        synchronized (this) {
            for (int i = 0; i < size; i++) {
                Persistent object = (Persistent) objects.get(i);
               
                // skip null objects... possible since 3.0 in some EJBQL results
                if (object == null) {
                    continue;
                }

                // skip HOLLOW objects as they likely were created from partial snapshots
                if (object.getPersistenceState() == PersistenceState.HOLLOW) {
                    continue;
                }

                ObjectId oid = object.getObjectId();

                // add snapshots if refresh is forced, or if a snapshot is
                // missing

                DataRow cachedSnapshot = (DataRow) this.snapshots.get(oid);
                if (refresh || cachedSnapshot == null) {

                    DataRow newSnapshot = (DataRow) snapshots.get(i);

                    if (cachedSnapshot != null) {
                        // use old snapshot if no changes occurred
                        if (object instanceof DataObject
                                && cachedSnapshot.equals(newSnapshot)) {
                            ((DataObject) object).setSnapshotVersion(cachedSnapshot
                                    .getVersion());
                            continue;
                        }
                        else {
                            newSnapshot.setReplacesVersion(cachedSnapshot.getVersion());
                        }
                    }

                    if (modified == null) {
                        modified = new HashMap();
                        eventPostedBy = object.getObjectContext().getGraphManager();
                    }

                    modified.put(oid, newSnapshot);
                }
            }
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        }

        public boolean startJointPrefetch(PrefetchTreeNode node) {
            PrefetchProcessorJointNode processorNode = (PrefetchProcessorJointNode) node;

            Persistent object = null;

            // find existing object, if found skip further processing
            Map id = processorNode.idFromFlatRow(currentFlatRow);
            object = processorNode.getResolved(id);
            DataRow row = null;
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                Iterator it = addedToUnresolved.iterator();
                while (it.hasNext()) {
                    Object next = it.next();

                    if (next instanceof Persistent) {
                        Persistent dataObject = (Persistent) next;
                        if (dataObject.getPersistenceState() == PersistenceState.TRANSIENT) {
                            continue;
                        }
                    }

                    if (!fetchedList.contains(next)) {
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        // must create both contexts before running the queries, as each call to
        // 'createDataContext' clears the cache.
        DataContext context = createDataContext();
        DataContext peerContext = createDataContext();

        Persistent _new = context.newObject(Artist.class);

        Persistent hollow = context.localObject(new ObjectId(
                "Artist",
                Artist.ARTIST_ID_PK_COLUMN,
                33001), null);
        DataObject committed = (DataObject) Cayenne.objectForQuery(
                context,
                new ObjectIdQuery(new ObjectId(
                        "Artist",
                        Artist.ARTIST_ID_PK_COLUMN,
                        33002)));

        int modifiedId = 33003;
        Artist modified = (Artist) Cayenne.objectForQuery(
                context,
                new ObjectIdQuery(new ObjectId(
                        "Artist",
                        Artist.ARTIST_ID_PK_COLUMN,
                        modifiedId)));
        modified.setArtistName("MODDED");
        DataObject deleted = (DataObject) Cayenne.objectForQuery(
                context,
                new ObjectIdQuery(new ObjectId(
                        "Artist",
                        Artist.ARTIST_ID_PK_COLUMN,
                        33004)));
        context.deleteObject(deleted);

        assertEquals(PersistenceState.HOLLOW, hollow.getPersistenceState());
        assertEquals(PersistenceState.COMMITTED, committed.getPersistenceState());
        assertEquals(PersistenceState.MODIFIED, modified.getPersistenceState());
        assertEquals(PersistenceState.DELETED, deleted.getPersistenceState());
        assertEquals(PersistenceState.NEW, _new.getPersistenceState());

        // now check how objects in different state behave

        // on the one hand sticking an alien NEW object to a peer DataContext doesn't look
        // like a good idea, on the other hand the code detecting whether a given context
        // is a child of another context breaks DataChannel encapsulation (i.e. using
        // "instanceof" to check DataChannel type will make it impossible to use Proxies).

        // try {
        // peerContext.localObjects(Collections.singletonList(_new));
        // fail("A presence of new object should have triggered an exception");
        // }
        // catch (CayenneRuntimeException e) {
        // // expected
        // }

        blockQueries();

        try {

            Persistent hollowPeer = peerContext.localObject(hollow.getObjectId(), null);
            assertEquals(PersistenceState.HOLLOW, hollowPeer.getPersistenceState());
            assertEquals(hollow.getObjectId(), hollowPeer.getObjectId());
            assertSame(peerContext, hollowPeer.getObjectContext());
            assertSame(context, hollow.getObjectContext());

            Persistent committedPeer = peerContext.localObject(
                    committed.getObjectId(),
                    null);
            assertEquals(PersistenceState.HOLLOW, committedPeer.getPersistenceState());
            assertEquals(committed.getObjectId(), committedPeer.getObjectId());
            assertSame(peerContext, committedPeer.getObjectContext());
            assertSame(context, committed.getObjectContext());

            Persistent modifiedPeer = peerContext.localObject(
                    modified.getObjectId(),
                    null);
            assertEquals(PersistenceState.HOLLOW, modifiedPeer.getPersistenceState());
            assertEquals(modified.getObjectId(), modifiedPeer.getObjectId());
            assertSame(peerContext, modifiedPeer.getObjectContext());
            assertSame(context, modified.getObjectContext());

            Persistent deletedPeer = peerContext.localObject(deleted.getObjectId(), null);
            assertEquals(PersistenceState.HOLLOW, deletedPeer.getPersistenceState());
            assertEquals(deleted.getObjectId(), deletedPeer.getObjectId());
            assertSame(peerContext, deletedPeer.getObjectContext());
            assertSame(context, deleted.getObjectContext());
        }
        finally {
            unblockQueries();
        }
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        blockQueries();

        try {

            Persistent peerModified2 = peerContext.localObject(
                    modified.getObjectId(),
                    null);

            assertSame(peerModified, peerModified2);
            assertEquals(PersistenceState.MODIFIED, peerModified2.getPersistenceState());
            assertEquals("M2", peerModified.getArtistName());
            assertEquals("M1", modified.getArtistName());
        }
        finally {
            unblockQueries();
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        createTestData("testArtists");

        DataContext context = createDataContext();
        ObjectContext childContext = context.createChildContext();

        Persistent _new = context.newObject(Artist.class);

        Persistent hollow = context.localObject(new ObjectId(
                "Artist",
                Artist.ARTIST_ID_PK_COLUMN,
                33001), null);
        DataObject committed = (DataObject) Cayenne.objectForQuery(
                context,
                new ObjectIdQuery(new ObjectId(
                        "Artist",
                        Artist.ARTIST_ID_PK_COLUMN,
                        33002)));

        int modifiedId = 33003;
        Artist modified = (Artist) Cayenne.objectForQuery(
                context,
                new ObjectIdQuery(new ObjectId(
                        "Artist",
                        Artist.ARTIST_ID_PK_COLUMN,
                        modifiedId)));
        modified.setArtistName("M1");
        DataObject deleted = (DataObject) Cayenne.objectForQuery(
                context,
                new ObjectIdQuery(new ObjectId(
                        "Artist",
                        Artist.ARTIST_ID_PK_COLUMN,
                        33004)));
        context.deleteObject(deleted);

        assertEquals(PersistenceState.HOLLOW, hollow.getPersistenceState());
        assertEquals(PersistenceState.COMMITTED, committed.getPersistenceState());
        assertEquals(PersistenceState.MODIFIED, modified.getPersistenceState());
        assertEquals(PersistenceState.DELETED, deleted.getPersistenceState());
        assertEquals(PersistenceState.NEW, _new.getPersistenceState());

        // now check how objects in different state behave

        blockQueries();

        try {

            Persistent newPeer = childContext.localObject(_new.getObjectId(), _new);

            assertEquals(_new.getObjectId(), newPeer.getObjectId());
            assertEquals(PersistenceState.COMMITTED, newPeer.getPersistenceState());

            assertSame(childContext, newPeer.getObjectContext());
            assertSame(context, _new.getObjectContext());

            Persistent hollowPeer = childContext
                    .localObject(hollow.getObjectId(), hollow);
            assertEquals(PersistenceState.HOLLOW, hollowPeer.getPersistenceState());
            assertEquals(hollow.getObjectId(), hollowPeer.getObjectId());
            assertSame(childContext, hollowPeer.getObjectContext());
            assertSame(context, hollow.getObjectContext());

            Persistent committedPeer = childContext.localObject(
                    committed.getObjectId(),
                    committed);
            assertEquals(PersistenceState.COMMITTED, committedPeer.getPersistenceState());
            assertEquals(committed.getObjectId(), committedPeer.getObjectId());
            assertSame(childContext, committedPeer.getObjectContext());
            assertSame(context, committed.getObjectContext());

            Artist modifiedPeer = (Artist) childContext.localObject(modified
                    .getObjectId(), modified);
            assertEquals(PersistenceState.COMMITTED, modifiedPeer.getPersistenceState());
            assertEquals(modified.getObjectId(), modifiedPeer.getObjectId());
            assertEquals("M1", modifiedPeer.getArtistName());
            assertSame(childContext, modifiedPeer.getObjectContext());
            assertSame(context, modified.getObjectContext());

            Persistent deletedPeer = childContext.localObject(
                    deleted.getObjectId(),
                    deleted);
            assertEquals(PersistenceState.COMMITTED, deletedPeer.getPersistenceState());
            assertEquals(deleted.getObjectId(), deletedPeer.getObjectId());
            assertSame(childContext, deletedPeer.getObjectContext());
            assertSame(context, deleted.getObjectContext());
        }
        finally {
            unblockQueries();
        }
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        blockQueries();

        try {

            Persistent peerModified2 = childContext.localObject(
                    modified.getObjectId(),
                    modified);
            assertSame(peerModified, peerModified2);
            assertEquals(PersistenceState.MODIFIED, peerModified2.getPersistenceState());
            assertEquals("M2", peerModified.getArtistName());
            assertEquals("M1", modified.getArtistName());
        }
        finally {
            unblockQueries();
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        DataContext parent = createDataContext();
        ObjectContext child = parent.createChildContext();

        // test how different object states appear in the child on select

        Persistent _new = parent.newObject(Artist.class);

        Persistent hollow = parent.localObject(new ObjectId(
                "Artist",
                Artist.ARTIST_ID_PK_COLUMN,
                33001), null);
        DataObject committed = (DataObject) Cayenne.objectForQuery(
                parent,
                new ObjectIdQuery(new ObjectId(
                        "Artist",
                        Artist.ARTIST_ID_PK_COLUMN,
                        33002)));

        int modifiedId = 33003;
        Artist modified = (Artist) Cayenne.objectForQuery(
                parent,
                new ObjectIdQuery(new ObjectId(
                        "Artist",
                        Artist.ARTIST_ID_PK_COLUMN,
                        modifiedId)));
        modified.setArtistName("MODDED");
        DataObject deleted = (DataObject) Cayenne.objectForQuery(
                parent,
                new ObjectIdQuery(new ObjectId(
                        "Artist",
                        Artist.ARTIST_ID_PK_COLUMN,
                        33004)));
        parent.deleteObject(deleted);

        assertEquals(PersistenceState.HOLLOW, hollow.getPersistenceState());
        assertEquals(PersistenceState.COMMITTED, committed.getPersistenceState());
        assertEquals(PersistenceState.MODIFIED, modified.getPersistenceState());
        assertEquals(PersistenceState.DELETED, deleted.getPersistenceState());
        assertEquals(PersistenceState.NEW, _new.getPersistenceState());
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Related Classes of org.apache.cayenne.Persistent

  • org.apache.cayenne.access.ChildDiffLoader
  • org.apache.cayenne.access.ClientServerChannelQueryAction
  • org.apache.cayenne.access.DataContext
  • org.apache.cayenne.access.DataContextDeleteAction
  • org.apache.cayenne.access.DataContextExtrasTest
  • org.apache.cayenne.access.DataContextFlushEventHandler
  • org.apache.cayenne.access.DataContextMergeHandler
  • org.apache.cayenne.access.DataContextObjectTrackingTest
  • org.apache.cayenne.access.DataContextQueryAction
  • org.apache.cayenne.access.DataDomainDeleteBucket
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