Examples of 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

Examples of org.apache.cayenne.query.ObjectIdQuery

            logObj.debug("no cached snapshot for ObjectId: " + oid);
        }


        // try getting it from database


        Query query = new ObjectIdQuery(oid, true, ObjectIdQuery.CACHE_REFRESH);
        List results = channel.onQuery(null, query).firstList();


        if (results.size() > 1) {
            throw new CayenneRuntimeException("More than 1 object found for ObjectId "
                    + oid

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Examples of org.apache.cayenne.query.ObjectIdQuery

    }


    private boolean interceptOIDQuery() {
        if (query instanceof ObjectIdQuery) {


            ObjectIdQuery oidQuery = (ObjectIdQuery) query;


            DataRow row = null;


            if (!oidQuery.isFetchMandatory()) {
                row = cache.getCachedSnapshot(oidQuery.getObjectId());
            }


            // refresh is forced or not found in cache
            if (row == null) {


                if (oidQuery.isFetchAllowed()) {


                    runQueryInTransaction();


                    List result = response.firstList();
                    if (result != null && !result.isEmpty()) {


                        if (result.size() > 1) {
                            throw new CayenneRuntimeException(
                                    "More than 1 row found for ObjectId "
                                            + oidQuery.getObjectId()
                                            + ". Fetch matched "
                                            + result.size()
                                            + " rows.");
                        }


                        // cache for future use
                        cache.snapshots.put(oidQuery.getObjectId(), result.get(0));
                    }
                }
                else {
                    response = new ListResponse();
                }

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Examples of org.apache.cayenne.query.ObjectIdQuery

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


            ObjectId gid = object.getObjectId();
            List objects = performQuery(new ObjectIdQuery(gid));


            if (objects.size() == 0) {
                throw new FaultFailureException(
                        "Error resolving fault, no matching row exists in the database for GlobalID: "
                                + gid);

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Examples of org.apache.cayenne.query.ObjectIdQuery

     * @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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Examples of org.apache.cayenne.query.ObjectIdQuery

     * @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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Examples of org.apache.cayenne.query.ObjectIdQuery


    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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Examples of org.apache.cayenne.query.ObjectIdQuery

     * @return A persistent object that matched the id, null if no matching objects were
     *         found
     * @throws CayenneRuntimeException if more than one object matched ObjectId.
     */
    public static Object objectForPK(ObjectContext context, ObjectId id) {
        return DataObjectUtils.objectForQuery(context, new ObjectIdQuery(
                id,
                false,
                ObjectIdQuery.CACHE));
    }

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Examples of org.apache.cayenne.query.ObjectIdQuery

        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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Examples of org.apache.cayenne.query.ObjectIdQuery

     * Overrides super implementation to property handle data row fetches.
     */
    @Override
    protected boolean interceptOIDQuery() {
        if (query instanceof ObjectIdQuery) {
            ObjectIdQuery oidQuery = (ObjectIdQuery) query;


            if (!oidQuery.isFetchMandatory()) {
                Object object = actingContext.getGraphManager().getNode(
                        oidQuery.getObjectId());
                if (object != null) {


                    // TODO: andrus, 10/14/2006 - obtaining a row from an object is the
                    // only piece that makes this method different from the super
                    // implementation. This is used in NEW objects sorting on insert. It
                    // would be nice to implement an alternative algorithm that wouldn't
                    // require this hack.
                    if (oidQuery.isFetchingDataRows()) {
                        object = ((DataContext) actingContext)
                                .currentSnapshot((Persistent) object);
                    }
                    // do not return hollow objects
                    else if (((Persistent) object).getPersistenceState() == PersistenceState.HOLLOW) {

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Examples of org.apache.cayenne.query.ObjectIdQuery

    }


    private boolean interceptOIDQuery() {
        if (query instanceof ObjectIdQuery) {


            ObjectIdQuery oidQuery = (ObjectIdQuery) query;
            DataRow row = null;


            if (cache != null && !oidQuery.isFetchMandatory()) {
                row = cache.getCachedSnapshot(oidQuery.getObjectId());
            }


            // refresh is forced or not found in cache
            if (row == null) {


                if (oidQuery.isFetchAllowed()) {


                    runQueryInTransaction();
                }
                else {
                    response = new ListResponse();

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