| /* |
| * 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.mobilewebapp.presenter.task; |
| |
| import com.google.gwt.place.shared.Place; |
| import com.google.gwt.place.shared.PlaceTokenizer; |
| import com.google.gwt.place.shared.Prefix; |
| import com.google.gwt.sample.mobilewebapp.shared.TaskProxy; |
| |
| /** |
| * The place in the app that shows and edits details of a task. |
| */ |
| public class TaskPlace extends Place { |
| |
| /** |
| * The tokenizer for this place. |
| */ |
| @Prefix("edit") |
| public static class Tokenizer implements PlaceTokenizer<TaskPlace> { |
| |
| private static final String NO_ID = "create"; |
| |
| public TaskPlace getPlace(String token) { |
| try { |
| // Parse the task ID from the URL. |
| Long taskId = Long.parseLong(token); |
| return new TaskPlace(taskId, null); |
| } catch (NumberFormatException e) { |
| // If the ID cannot be parsed, assume we are creating a task. |
| return TaskPlace.getTaskCreatePlace(); |
| } |
| } |
| |
| public String getToken(TaskPlace place) { |
| Long taskId = place.getTaskId(); |
| return (taskId == null) ? NO_ID : taskId.toString(); |
| } |
| } |
| |
| /** |
| * The singleton instance of this place used for creation. |
| */ |
| private static TaskPlace singleton; |
| |
| /** |
| * Create an instance of {@link TaskPlace} associated with the specified task |
| * ID. |
| * |
| * @param taskId the ID of the task to edit |
| * @param task the task to edit, or null if not available |
| * @return the place |
| */ |
| public static TaskPlace createTaskEditPlace(Long taskId, TaskProxy task) { |
| return new TaskPlace(taskId, task); |
| } |
| |
| /** |
| * Get the singleton instance of the {@link TaskPlace} used to create a new |
| * task. |
| * |
| * @return the place |
| */ |
| public static TaskPlace getTaskCreatePlace() { |
| if (singleton == null) { |
| singleton = new TaskPlace(null, null); |
| } |
| return singleton; |
| } |
| |
| private final TaskProxy task; |
| private final Long taskId; |
| |
| /** |
| * Construct a new {@link TaskPlace} for the specified task id. |
| * |
| * @param taskId the ID of the task to edit |
| * @param task the task to edit, or null if not available |
| */ |
| private TaskPlace(Long taskId, TaskProxy task) { |
| this.taskId = taskId; |
| this.task = task; |
| } |
| |
| /** |
| * Get the task to edit. |
| * |
| * @return the task to edit, or null if not available |
| */ |
| public TaskProxy getTask() { |
| return task; |
| } |
| |
| /** |
| * Get the ID of the task to edit. |
| * |
| * @return the ID of the task, or null if creating a new task |
| */ |
| public Long getTaskId() { |
| return taskId; |
| } |
| } |