| /****************************************************************************** |
| * Copyright (c) 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.type.core.internal.impl; |
| |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.gmf.runtime.emf.type.core.ClientContext; |
| import org.eclipse.gmf.runtime.emf.type.core.ClientContextManager; |
| import org.eclipse.gmf.runtime.emf.type.core.IClientContext; |
| import org.eclipse.gmf.runtime.emf.type.core.IElementMatcher; |
| import org.eclipse.gmf.runtime.emf.type.core.IElementType; |
| import org.eclipse.gmf.runtime.emf.type.core.IElementTypeDescriptor; |
| import org.eclipse.gmf.runtime.emf.type.core.internal.descriptors.IEditHelperAdviceDescriptor; |
| |
| /** |
| * The default client context which includes the types and advice specifically |
| * bound to it, as well as any types and advice to which no other context has |
| * been bound. |
| * |
| * @author ldamus |
| */ |
| public final class DefaultClientContext extends ClientContext { |
| |
| /** |
| * Identifier for the default client context. |
| */ |
| public static final String ID = "org.eclipse.gmf.runtime.emf.type.core.defaultContext"; //$NON-NLS-1$ |
| |
| /** |
| * The singleton instance. |
| */ |
| private static IClientContext _instance; |
| |
| /** |
| * Gets the singleton instance. |
| * |
| * @return the default client context |
| */ |
| public static final IClientContext getInstance() { |
| if (_instance == null) { |
| _instance = new DefaultClientContext(); |
| } |
| return _instance; |
| } |
| |
| /** |
| * Private constructor for the singleton. |
| */ |
| private DefaultClientContext() { |
| super(ID, new IElementMatcher() { |
| public boolean matches(EObject eObject) { |
| return true; |
| } |
| }); |
| } |
| |
| /** |
| * Includes the <code>elementTypeDescriptor</code> if it is explicitly |
| * bound to me, or there is no other context bound to it. |
| */ |
| public boolean includes(IElementTypeDescriptor elementTypeDescriptor) { |
| boolean result = super.includes(elementTypeDescriptor); |
| |
| if (!result) { |
| result = ClientContextManager.getInstance().getBinding( |
| elementTypeDescriptor) == _instance; |
| } |
| return result; |
| } |
| |
| /** |
| * Includes the <code>advice</code> if it is explicitly bound to me, or |
| * there is no other context bound to it. |
| */ |
| public boolean includes(IEditHelperAdviceDescriptor advice) { |
| boolean result = super.includes(advice); |
| |
| if (!result) { |
| result = ClientContextManager.getInstance().getBinding(advice) == _instance; |
| } |
| return result; |
| } |
| |
| /** |
| * Includes the <code>elementTyper</code> if it is explicitly bound to me, |
| * or there is no other context bound to it. |
| */ |
| public boolean includes(IElementType elementType) { |
| boolean result = super.includes(elementType); |
| |
| if (!result) { |
| result = ClientContextManager.getInstance().getBinding(elementType) == _instance; |
| } |
| return result; |
| } |
| |
| } |