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/*
 * Copyright 2006 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.user.client;

import com.google.gwt.core.client.Scheduler;

/**
 * Encapsulates an action for later execution, often from a different context.
 * 
 * 

* The Command interface provides a layer of separation between the code * specifying some behavior and the code invoking that behavior. This separation * aids in creating reusable code. For example, a * {@link com.google.gwt.user.client.ui.MenuItem} can have a Command associated * with it that it executes when the menu item is chosen by the user. * Importantly, the code that constructed the Command to be executed when the * menu item is invoked knows nothing about the internals of the MenuItem class * and vice-versa. *

* *

* The Command interface is often implemented with an anonymous inner class. For * example, * *

 * Command sayHello = new Command() {
 *   public void execute() {
 *     Window.alert("Hello");
 *   }
 * };
 * sayHello.execute();
 * 
* *

* This type extends ScheduledCommand to help migrate from DeferredCommand API. */ public interface Command extends Scheduler.ScheduledCommand { /** * Causes the Command to perform its encapsulated behavior. */ void execute(); }




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