Examples of org.apache.cayenne.query.ObjectIdQuery

org.apache.cayenne.query.ObjectIdQuery
A query that matches zero or one object or data row corresponding to the ObjectId. Used internally by Cayenne to lookup objects by id. Notice that cache policies of ObjectIdQuery are different from generic {@link QueryMetadata} cache policies.ObjectIdQuery is special - it is the only query that can be done against Cayenne main cache, thus cache handling is significantly different from all other of the queries. @since 1.2 @author Andrus Adamchik

                "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.deleteObjects(deleted);

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        final ClientMtTable1 modified = clientContext.newObject(ClientMtTable1.class);
        clientContext.commitChanges();


        final ClientMtTable1 peerModified = (ClientMtTable1) Cayenne.objectForQuery(
                child,
                new ObjectIdQuery(modified.getObjectId()));


        modified.setGlobalAttribute1("M1");
        peerModified.setGlobalAttribute1("M2");


        assertEquals(PersistenceState.MODIFIED, modified.getPersistenceState());

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        // parent channel (not sure if that's a good strategy with ROP?)


        // note that since the query is configured to only hit the cache and avoid going
        // to DB, it will not throw, but rather return NULL if the object we are looking
        // for is not found.
        ObjectIdQuery query = new ObjectIdQuery(id, false, ObjectIdQuery.CACHE_NOREFRESH);


        localObject = (T) Cayenne.objectForQuery(this, query);
        if (localObject != null) {
            return localObject;
        }

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    public void prepareForAccess(Persistent object, String property, boolean lazyFaulting) {
        if (object.getPersistenceState() == PersistenceState.HOLLOW) {


            ObjectId oid = object.getObjectId();
            List<?> objects = performQuery(new ObjectIdQuery(
                    oid,
                    false,
                    ObjectIdQuery.CACHE));


            if (objects.size() == 0) {

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     * @since 1.1
     */
    public DataRow getCachedSnapshot(ObjectId oid) {


        if (context != null && context.getChannel() != null) {
            ObjectIdQuery query = new CachedSnapshotQuery(oid);
            List<?> results = context.getChannel().onQuery(context, query).firstList();
            return results.isEmpty() ? null : (DataRow) results.get(0);
        }
        else {
            return null;

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     * @since 1.2
     */
    public synchronized DataRow getSnapshot(ObjectId oid) {


        if (context != null && context.getChannel() != null) {
            ObjectIdQuery query = new ObjectIdQuery(oid, true, ObjectIdQuery.CACHE);
            List<?> results = context.getChannel().onQuery(context, query).firstList();
            return results.isEmpty() ? null : (DataRow) results.get(0);
        }
        else {
            return null;

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        // Exhibit with Gallery as Fault must still include Gallery
        // Artist and Exhibit (Exhibit has unresolved to-one to gallery as in the
        // CAY-96 bug report)


        ObjectId eId = new ObjectId("Exhibit", Exhibit.EXHIBIT_ID_PK_COLUMN, 2);
        Exhibit e = (Exhibit) context.performQuery(new ObjectIdQuery(eId)).get(0);


        assertTrue(e.readPropertyDirectly(Exhibit.TO_GALLERY_PROPERTY) instanceof Fault);


        DataRow snapshot = context.currentSnapshot(e);

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        if (id.isTemporary()) {
            return null;
        }


        // skip context cache lookup, go directly to its channel
        Query query = new ObjectIdQuery((ObjectId) nodeId);
        QueryResponse response = context.getChannel().onQuery(context, query);
        List objects = response.firstList();


        if (objects.size() == 0) {
            throw new CayenneRuntimeException("No object for ID exists: " + nodeId);

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        // how do we handle this for NEW objects correctly? For now bail from the method
        if (object.getObjectId().isTemporary()) {
            return null;
        }


        ObjectIdQuery query = new ObjectIdQuery(
                object.getObjectId(),
                true,
                ObjectIdQuery.CACHE);
        QueryResponse response = context.getChannel().onQuery(null, query);
        List<?> result = response.firstList();

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        if (id.isTemporary()) {
            return null;
        }


        // skip context cache lookup, go directly to its channel
        Query query = new ObjectIdQuery((ObjectId) nodeId);
        QueryResponse response = context.getChannel().onQuery(context, query);
        List objects = response.firstList();


        if (objects.size() == 0) {
            throw new CayenneRuntimeException("No object for ID exists: " + nodeId);

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