Examples of org.apache.cayenne.DataObject

org.apache.cayenne.DataObject
Defines basic methods for a persistent object in Cayenne.

        // create a clone to be able to inspect paintings after deletion
        List paintingsClone = new ArrayList(paintings);


        Iterator it = paintingsClone.iterator();
        while (it.hasNext()) {
            DataObject object = (DataObject) it.next();
            assertEquals(PersistenceState.COMMITTED, object.getPersistenceState());
        }


        Iterator deleteIt = paintings.iterator();
        while (deleteIt.hasNext()) {
            DataObject object = (DataObject) deleteIt.next();
            deleteIt.remove();
            context.deleteObject(object);
        }


        // relationship list has to be cleaned up,
        // and no exceptions thrown on concurrent modification...
        assertEquals(0, paintings.size());


        it = paintingsClone.iterator();
        while (it.hasNext()) {
            DataObject object = (DataObject) it.next();
            assertEquals(PersistenceState.DELETED, object.getPersistenceState());
        }
    }

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        DataRow row = new DataRow(10);
        row.put("ARTIST_ID", new Integer(1));
        row.put("ARTIST_NAME", "ArtistXYZ");
        row.put("DATE_OF_BIRTH", new Date());
        DataObject obj = context.objectFromDataRow(Artist.class, row);
        ObjectId oid = obj.getObjectId();


        assertEquals(PersistenceState.COMMITTED, obj.getPersistenceState());
        assertSame(context, obj.getObjectContext());
        assertSame(obj, context.getGraphManager().getNode(oid));


        context.unregisterObjects(Collections.singletonList(obj));


        assertEquals(PersistenceState.TRANSIENT, obj.getPersistenceState());
        assertNull(obj.getObjectContext());
        assertNull(obj.getObjectId());
        assertNull(context.getGraphManager().getNode(oid));
        assertNull(context.getObjectStore().getCachedSnapshot(oid));
    }

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        DataRow row = new DataRow(10);
        row.put("ARTIST_ID", new Integer(1));
        row.put("ARTIST_NAME", "ArtistXYZ");
        row.put("DATE_OF_BIRTH", new Date());
        DataObject obj = context.objectFromDataRow(Artist.class, row);
        ObjectId oid = obj.getObjectId();


        assertEquals(PersistenceState.COMMITTED, obj.getPersistenceState());
        assertSame(context, obj.getObjectContext());
        assertSame(obj, context.getGraphManager().getNode(oid));


        context.invalidateObjects(Collections.singletonList(obj));


        assertEquals(PersistenceState.HOLLOW, obj.getPersistenceState());
        assertSame(context, obj.getObjectContext());
        assertSame(oid, obj.getObjectId());
        assertNull(context.getObjectStore().getCachedSnapshot(oid));
        assertNotNull(context.getGraphManager().getNode(oid));
    }

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        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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        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();
        }
    }

View Full Code Here


        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());


        List objects = child.performQuery(new SelectQuery(Artist.class));
        assertEquals("All but NEW object must have been included", 4, objects.size());


        Iterator it = objects.iterator();
        while (it.hasNext()) {
            DataObject next = (DataObject) it.next();
            assertEquals(PersistenceState.COMMITTED, next.getPersistenceState());


            int id = Cayenne.intPKForObject(next);
            if (id == modifiedId) {
                assertEquals("MODDED", next.readProperty(Artist.ARTIST_NAME_PROPERTY));
            }
        }
    }

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                    + oid
                    + ", as it is a temporary id.");
        }


        synchronized (getObjectStore()) {
            DataObject object = (DataObject) objectStore.getNode(oid);


            // clean up any cached data for this object
            if (object != null) {
                this.invalidateObjects(Collections.singleton(object));
            }
        }


        DataObject object = (DataObject) DataObjectUtils.objectForQuery(
                this,
                new ObjectIdQuery(oid));


        if (object == null) {
            throw new CayenneRuntimeException(

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        Iterator it = rows.iterator();


        while (it.hasNext()) {


            DataRow row = (DataRow) it.next();
            DataObject object = objectFromDataRow(row);
            results.add(object);


            // link with parent


            // The algorithm below of building an ID doesn't take inheritance into
            // account, so there maybe a miss...
            ObjectId id = createObjectId(row, sourceObjEntity, relatedIdPrefix);
            DataObject parentObject = (DataObject) context.getObjectStore().getNode(id);


            // don't attach to hollow objects
            if (parentObject != null
                    && parentObject.getPersistenceState() != PersistenceState.HOLLOW) {
                node.linkToParent(object, parentObject);
            }
        }


        // now deal with snapshots

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        // not using DataRow.createObjectId for performance reasons - ObjectResolver has
        // all needed metadata already cached.
        ObjectId anId = createObjectId(row, objectEntity, null);


        // this will create a HOLLOW object if it is not registered yet
        DataObject object = (DataObject) context.localObject(anId, null);


        // deal with object state
        int state = object.getPersistenceState();
        switch (state) {
            case PersistenceState.COMMITTED:
            case PersistenceState.MODIFIED:
            case PersistenceState.DELETED:
                // process the above only if refresh is requested...
                if (refreshObjects) {
                    DataRowUtils.mergeObjectWithSnapshot(objectEntity, object, row);
                    object.setSnapshotVersion(row.getVersion());
                }
                break;
            case PersistenceState.HOLLOW:
                if(!refreshObjects) {
                    DataRow cachedRow = cache.getCachedSnapshot(anId);
                    if(cachedRow != null) {
                        row = cachedRow;
                    }
                }
                DataRowUtils.mergeObjectWithSnapshot(objectEntity, object, row);
                object.setSnapshotVersion(row.getVersion());
                break;
            default:
                break;
        }


        object.fetchFinished();
        return object;
    }

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     *
     * @return true if the <tt>DataObject</tt> was saved or false otherwise
     */
    public boolean saveChanges() {
        // Load data object into data context
        DataObject localDataObject = getDataObject();


        if (!isPersistent(localDataObject)) {
            getDataContext().registerNewObject(localDataObject);
        }

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org.apache.cayenne.access.ChildDiffLoader

org.apache.cayenne.access.DataContext

org.apache.cayenne.access.DataContextDeleteAction

org.apache.cayenne.access.DataContextExtrasTest

org.apache.cayenne.access.DataContextObjectTrackingTest

org.apache.cayenne.access.DataContextPrefetchExtrasTest

org.apache.cayenne.access.DataContextPrefetchTest

org.apache.cayenne.access.DataContextTest

org.apache.cayenne.access.DataDomainDeleteBucket

org.apache.cayenne.access.DataDomainInsertBucket

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