| // RelativeValueHistoryProviderAdapterFactory.java |
| package org.eclipse.stem.definitions.adapters.relativevalue.history; |
| |
| /******************************************************************************* |
| * Copyright (c) 2007 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 |
| *******************************************************************************/ |
| |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.emf.edit.provider.ComposeableAdapterFactory; |
| import org.eclipse.emf.edit.provider.ComposedAdapterFactory; |
| import org.eclipse.emf.edit.provider.IChangeNotifier; |
| import org.eclipse.emf.edit.provider.IDisposable; |
| import org.eclipse.stem.definitions.adapters.relativevalue.RelativeValueProviderAdapterFactory; |
| |
| /** |
| * This interface is implemented by classes that create adapters that adapt |
| * {@link EObject}s to {@link RelativeValueHistoryProvider}s. |
| */ |
| public interface RelativeValueHistoryProviderAdapterFactory extends |
| ComposeableAdapterFactory, IChangeNotifier, IDisposable { |
| |
| /** |
| * This is the singleton instance of the factory that creates |
| * {@link RelativeValueHistoryProvider} instances. |
| * <p> |
| * This instance is a {@link ComposedAdapterFactory} which means that it |
| * collects together other {@link ComposeableAdapterFactory} adapter |
| * factories. Each class that implements |
| * {@link RelativeValueProviderAdapterFactory} needs to add itself to this |
| * instance with a call to |
| * {@link ComposedAdapterFactory#addAdapterFactory(org.eclipse.emf.common.notify.AdapterFactory)}. |
| * This will then allow adapters created by that factory to be found when |
| * adapting class instances handled by the new factory. |
| * <p> |
| * Basically, if you create an EMF model and define a |
| * {@link RelativeValueHistoryProviderAdapterFactory} for it so that the |
| * classes in that model can be adapted, you need to hook that factory into |
| * this one so that later when an attempt is made to adapt a class from that |
| * model is made the associated factory will be found. You can do that by |
| * adding the line: <code> |
| * RelativeValueHistoryProviderAdapterFactory.INSTANCE.addAdapterFactory(this); |
| * </code> |
| * to the default constructor of the new factory after the super call. |
| * You're not done however, you also have to "force" an instance of the |
| * class to be created so that the constructor is run. This is typically |
| * achieved by allocating an instance in the <code>start</code> method of |
| * the <code>Activator</code> of the plug-in that defines the factory. |
| */ |
| RelativeValueHistoryProviderAdapterFactoryImpl INSTANCE = new RelativeValueHistoryProviderAdapterFactoryImpl(); |
| |
| /** |
| * This class represents |
| */ |
| public class RelativeValueHistoryProviderAdapterFactoryImpl extends |
| ComposedAdapterFactory implements |
| RelativeValueHistoryProviderAdapterFactory { |
| /** |
| * @see org.eclipse.emf.edit.provider.ComposedAdapterFactory#isFactoryForType(java.lang.Object) |
| */ |
| @Override |
| public boolean isFactoryForType(Object type) { |
| return type == RelativeValueHistoryProvider.class; |
| } // isFactoryForType |
| } // RelativeValueHistoryProviderAdapterFactoryImpl |
| |
| } // RelativeValueHistoryProviderAdapterFactory |
