| /****************************************************************************** |
| * Copyright (c) 2004, 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.gmf.runtime.emf.core.util; |
| |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.emf.ecore.EObject; |
| |
| import org.eclipse.gmf.runtime.common.core.util.Proxy; |
| |
| /** |
| * Wraps an {@link EObject} to adapt it to the {@link IAdaptable} Eclipse |
| * platform API. This is useful for passing <code>EObject</code>s into |
| * APIs that consume adaptables. |
| * <p> |
| * See the {@link #getAdapter(Class)} method for the supported adaptations. |
| * <b>Note</b> that this implementation does not consult the Eclipse platform's |
| * adapter factory manager for registered adapters. |
| * </p> |
| * <p> |
| * <b>Note</b> that this class is not intended to be extended |
| * by clients. Clients may instantiate it. |
| * </p> |
| * |
| * @author Anthony Hunter |
| * |
| * @see #getAdapter(Class) |
| */ |
| public class EObjectAdapter extends Proxy implements IAdaptable, IProxyEObject { |
| |
| public EObjectAdapter(EObject element) { |
| super(element); |
| } |
| |
| /** |
| * Returns the wrapped {@link EObject} as the adapter when possible. |
| * The following adaptations are supported: |
| * <ul> |
| * <li>if the wrapped <code>EObject</code> conforms to the |
| * <code>adapter</code> type, then it is returned</li> |
| * <li>if this adapter, itself, conforms to the <code>adapter</code> |
| * type, then it is returned</li> |
| * <li>otherwise, there is no adapter (<code>null</code> returned)</li> |
| * </ul> |
| */ |
| public Object getAdapter(Class adapter) { |
| if ( adapter.isInstance(getRealObject() )) { |
| return getRealObject(); |
| } |
| if ( adapter.isInstance(this) ) { |
| return this; |
| } |
| return null; |
| } |
| |
| public final Object getProxyClassID() { |
| return PackageUtil.getID(EMFCoreUtil.getProxyClass((EObject)getRealObject())); |
| } |
| |
| public final EObject resolve() { |
| // there is no editing domain or resource set context available in |
| // which to attempt to resolve the proxy, so if it wasn't already |
| // resolved, we can only return null |
| EObject eObject = (EObject) getRealObject(); |
| |
| return eObject.eIsProxy()? null : eObject; |
| } |
| } |