| /******************************************************************************* |
| * Copyright (c) 2005, 2012 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.bpel.ui.util; |
| |
| import org.eclipse.emf.common.notify.Notification; |
| |
| /** |
| * A version of MultiObjectAdapter which separates notification into two phases: |
| * (1) the notification(s) that are generated during a given user operation are delivered |
| * one by one to the adapter, and then (2) the finish() method is called when the user |
| * operation is finished. |
| * |
| * This solves the problem of clients receiving notifications while the model is in an |
| * unusable state--clients receive notifications immediately and can inspect them to see |
| * whether the notification applies to them. However, they can defer any updating or |
| * refreshing actions until the finish() method is called, at which time model changes |
| * are complete and the model is in a consistent state again. |
| */ |
| public abstract class BatchedMultiObjectAdapter extends MultiObjectAdapter implements IBatchedAdapter { |
| |
| @Override |
| protected void doNotify(Notification n) { |
| if (CommandStackChangeBatcher.isBatchingChanges()) { |
| CommandStackChangeBatcher.registerBatchChange(this); |
| super.doNotify(n); |
| } else { |
| super.doNotify(n); |
| finish(); |
| } |
| } |
| |
| /** |
| * Subclasses must override this. |
| * @param n the notification |
| */ |
| |
| @Override |
| public abstract void notify(Notification n); |
| |
| /** |
| * Subclasses must override this. |
| */ |
| public abstract void finish(); |
| } |