| /******************************************************************************* |
| * Copyright (c) 2005, 2006 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.debug.internal.ui.viewers; |
| |
| |
| /** |
| * An update policy updates a viewer based on deltas reported by a model proxy. |
| * |
| * @since 3.2 |
| * |
| */ |
| public abstract class AbstractUpdatePolicy { |
| |
| private AsynchronousViewer fViewer = null; |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.viewers.IUpdatePolicy#init(org.eclipse.debug.ui.viewers.update.IPresentation) |
| */ |
| public void init(AsynchronousViewer viewer) { |
| fViewer = viewer; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.viewers.IUpdatePolicy#dispose() |
| */ |
| public synchronized void dispose() { |
| fViewer = null; |
| } |
| |
| /** |
| * Returns the viewer this policy is installed on or <code>null</code> |
| * if disposed. |
| * |
| * @return presentation to update |
| */ |
| public AsynchronousViewer getViewer() { |
| return fViewer; |
| } |
| |
| protected synchronized boolean isDisposed() { |
| return fViewer == null; |
| } |
| |
| } |