Examples of org.apache.cayenne.graph.CompoundDiff

org.apache.cayenne.graph.CompoundDiff
A GraphDiff that is a list of other GraphDiffs. @since 1.2


        if (lifecycleEventsEnabled) {
            EventManager eventManager = getEventManager();


            if (eventManager != null) {
                CompoundDiff notification = new CompoundDiff();
                notification.add(childDiff);
                notification.add(returnClientDiff);


                eventManager.postEvent(
                        new GraphEvent(this, notification),
                        DataChannel.GRAPH_FLUSHED_SUBJECT);
            }

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        Transaction transaction = Transaction.getThreadTransaction();
        if (transaction != null) {
            transaction.setRollbackOnly();
        }


        return new CompoundDiff();
    }

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    }


    GraphDiff flush(DataContext context, GraphDiff changes) {


        if (changes == null) {
            return new CompoundDiff();
        }


        // TODO: Andrus, 3/13/2006 - support categorizing an arbitrary diff
        if (!(changes instanceof ObjectStoreGraphDiff)) {
            throw new IllegalArgumentException("Expected 'ObjectStoreGraphDiff', got: "
                    + changes.getClass().getName());
        }


        // ObjectStoreGraphDiff contains changes already categorized by objectId...
        this.changesByObjectId = ((ObjectStoreGraphDiff) changes).getChangesByObjectId();
        this.insertBucket = new DataDomainInsertBucket(this);
        this.deleteBucket = new DataDomainDeleteBucket(this);
        this.updateBucket = new DataDomainUpdateBucket(this);
        this.flattenedBucket = new DataDomainFlattenedBucket(this);


        this.queries = new ArrayList();


        // note that there is no syncing on the object store itself. This is caller's
        // responsibility.
        synchronized (context.getObjectStore().getDataRowCache()) {


            this.resultIndirectlyModifiedIds = new HashSet();


            preprocess(context, changes);


            if (queries.isEmpty()) {
                return new CompoundDiff();
            }


            this.resultDiff = new CompoundDiff();
            this.resultDeletedIds = new ArrayList();
            this.resultModifiedSnapshots = new HashMap();


            runQueries();
            postprocess(context);

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    }


    GraphDiff flush(DataContext context, GraphDiff changes) {


        if (changes == null) {
            return new CompoundDiff();
        }


        // TODO: Andrus, 3/13/2006 - support categorizing an arbitrary diff
        if (!(changes instanceof ObjectStoreGraphDiff)) {
            throw new IllegalArgumentException("Expected 'ObjectStoreGraphDiff', got: "
                    + changes.getClass().getName());
        }


        this.context = context;
        
        // ObjectStoreGraphDiff contains changes already categorized by objectId...
        this.changesByObjectId = ((ObjectStoreGraphDiff) changes).getChangesByObjectId();
        this.insertBucket = new DataDomainInsertBucket(this);
        this.deleteBucket = new DataDomainDeleteBucket(this);
        this.updateBucket = new DataDomainUpdateBucket(this);
        this.flattenedBucket = new DataDomainFlattenedBucket(this);


        this.queries = new ArrayList();
        this.resultIndirectlyModifiedIds = new HashSet();


        preprocess(context, changes);


        if (queries.isEmpty()) {
            return new CompoundDiff();
        }


        this.resultDiff = new CompoundDiff();
        this.resultDeletedIds = new ArrayList();
        this.resultModifiedSnapshots = new HashMap();


        runQueries();

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     * (same as creation order).
     */
    private void resolveDiff() {
        if (resolvedDiff == null) {


            CompoundDiff diff = new CompoundDiff();
            Map changes = getChangesByObjectId();


            if (!changes.isEmpty()) {
                List allChanges = new ArrayList(changes.size() * 2);


                Iterator it = changes.values().iterator();
                while (it.hasNext()) {
                    ((ObjectDiff) it.next()).appendDiffs(allChanges);
                }


                Collections.sort(allChanges);
                diff.addAll(allChanges);
            }


            this.resolvedDiff = diff;
        }
    }

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                // single event
                boolean sentNoop = changes == null || changes.isNoop();
                boolean receivedNoop = replyDiff == null || replyDiff.isNoop();


                if (!sentNoop || !receivedNoop) {
                    CompoundDiff notification = new CompoundDiff();


                    if (!sentNoop) {
                        notification.add(changes);
                    }


                    if (!receivedNoop) {
                        notification.add(replyDiff);
                    }


                    Object postedBy = (originatingContext != null)
                            ? (Object) originatingContext
                            : this;

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        }
    }


    GraphDiff onContextRollback(ObjectContext originatingContext) {
        rollbackChanges();
        return new CompoundDiff();
    }

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        if (this != originatingContext && changes != null) {
            changes.apply(new ChildDiffLoader(this));
            fireDataChannelChanged(originatingContext, changes);
        }


        return (cascade) ? flushToParent(true) : new CompoundDiff();
    }

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                    : changes.isNoop();


            if (noop) {
                // need to clear phantom changes
                objectStore.postprocessAfterPhantomCommit();
                return new CompoundDiff();
            }


            try {
                GraphDiff returnChanges = getChannel().onSync(this, changes, syncType);

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    void postprocess() {


        if (!objectsByDescriptor.isEmpty()) {


            CompoundDiff result = parent.getResultDiff();
            Map modifiedSnapshots = parent.getResultModifiedSnapshots();
            Collection deletedIds = parent.getResultDeletedIds();


            Iterator it = objectsByDescriptor.entrySet().iterator();
            while (it.hasNext()) {


                Map.Entry entry = (Map.Entry) it.next();
                ClassDescriptor descriptor = (ClassDescriptor) entry.getKey();


                Iterator objects = ((Collection) entry.getValue()).iterator();
                while (objects.hasNext()) {
                    Persistent object = (Persistent) objects.next();
                    ObjectId id = object.getObjectId();


                    ObjectId finalId;


                    // record id change and update attributes for generated ids
                    if (id.isReplacementIdAttached()) {


                        Map replacement = id.getReplacementIdMap();
                        Iterator idProperties = descriptor.getIdProperties();
                        while (idProperties.hasNext()) {
                            AttributeProperty property = (AttributeProperty) idProperties
                                    .next();
                            Object value = replacement.get(property
                                    .getAttribute()
                                    .getDbAttributeName());


                            // TODO: andrus, 11/28/2006: this operation may be redundant
                            // if the id wasn't generated. We may need to optimize it...
                            if (value != null) {
                                property.writePropertyDirectly(object, null, value);
                            }
                        }


                        ObjectId replacementId = id.createReplacementId();


                        result.add(new NodeIdChangeOperation(id, replacementId));


                        // classify replaced permanent ids as "deleted", as
                        // DataRowCache has no notion of replaced id...
                        if (!id.isTemporary()) {
                            deletedIds.add(id);

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Related Classes of org.apache.cayenne.graph.CompoundDiff

org.apache.cayenne.access.ClientReturnDiffFilter

org.apache.cayenne.access.ClientServerChannel

org.apache.cayenne.access.DataContext

org.apache.cayenne.access.DataDomain

org.apache.cayenne.access.DataDomainFlushAction

org.apache.cayenne.access.DataDomainSyncBucket

org.apache.cayenne.access.ObjectStore

org.apache.cayenne.access.ObjectStoreGraphDiff

org.apache.cayenne.access.ServerToClientDiffConverter

org.apache.cayenne.BaseContext

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