Java tutorial
/******************************************************************************* * Copyright 2011 Google Inc. All Rights Reserved. * * 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 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/ package com.mailme.client.mvp; import com.google.gwt.activity.shared.Activity; import com.google.gwt.activity.shared.ActivityMapper; import com.google.gwt.place.shared.Place; import com.mailme.client.ClientFactory; import com.mailme.client.activity.AdminLoginActivity; import com.mailme.client.activity.AdminManagerActivity; import com.mailme.client.activity.LoginActivity; import com.mailme.client.activity.MailActivity; import com.mailme.client.place.AdminLoginPlace; import com.mailme.client.place.AdminManagerPlace; import com.mailme.client.place.LoginPlace; import com.mailme.client.place.MailPlace; /** * ActivityMapper associates each {@link Place} with its corresponding {@link Activity}. */ public class AppActivityMapper implements ActivityMapper { /** * Provided for {@link Activitie}s. */ private ClientFactory clientFactory; public AppActivityMapper(ClientFactory clientFactory) { this.clientFactory = clientFactory; } @Override public Activity getActivity(Place place) { if (place instanceof LoginPlace) return new LoginActivity((LoginPlace) place, clientFactory); if (place instanceof MailPlace) return new MailActivity((MailPlace) place, clientFactory); if (place instanceof AdminLoginPlace) return new AdminLoginActivity((AdminLoginPlace) place, clientFactory); if (place instanceof AdminManagerPlace) return new AdminManagerActivity((AdminManagerPlace) place, clientFactory); return null; } }