| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * 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.google.gwt.sample.gaerequest.client; |
| |
| import com.google.web.bindery.event.shared.Event; |
| import com.google.web.bindery.event.shared.EventBus; |
| import com.google.web.bindery.event.shared.HandlerRegistration; |
| |
| |
| /** |
| * An event posted when an authentication failure is detected. |
| */ |
| public class GaeAuthenticationFailureEvent extends Event<GaeAuthenticationFailureEvent.Handler> { |
| |
| /** |
| * Implemented by handlers of this type of event. |
| */ |
| public interface Handler { |
| /** |
| * Called when a {@link GaeAuthenticationFailureEvent} is fired. |
| * |
| * @param requestEvent a {@link GaeAuthenticationFailureEvent} instance |
| */ |
| void onAuthFailure(GaeAuthenticationFailureEvent requestEvent); |
| } |
| |
| private static final Type<Handler> TYPE = new Type<Handler>(); |
| |
| /** |
| * Register a {@link GaeAuthenticationFailureEvent.Handler} on an |
| * {@link EventBus}. |
| * |
| * @param eventBus the {@link EventBus} |
| * @param handler a {@link GaeAuthenticationFailureEvent.Handler} |
| * @return a {@link HandlerRegistration} instance |
| */ |
| public static HandlerRegistration register(EventBus eventBus, |
| GaeAuthenticationFailureEvent.Handler handler) { |
| return eventBus.addHandler(TYPE, handler); |
| } |
| |
| private final String loginUrl; |
| |
| /** |
| * Constructs a new @{link RequestEvent}. |
| * |
| * @param loginUrl the url used to login |
| */ |
| public GaeAuthenticationFailureEvent(String loginUrl) { |
| this.loginUrl = loginUrl; |
| } |
| |
| @Override |
| public Type<Handler> getAssociatedType() { |
| return TYPE; |
| } |
| |
| /** |
| * Returns the URL the user can visit to reauthenticate. |
| * |
| * @return a {@link com.google.gwt.http.client.Response} instance |
| */ |
| public String getLoginUrl() { |
| return loginUrl; |
| } |
| |
| @Override |
| protected void dispatch(Handler handler) { |
| handler.onAuthFailure(this); |
| } |
| } |