user/src/com/google/gwt/activity/shared/AbstractActivity.java

/*
 * Copyright 2010 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.activity.shared;

/**
 * Simple Activity implementation that is always willing to stop, and does
 * nothing onStop and onCancel.
 */
public abstract class AbstractActivity implements Activity {

  public String mayStop() {
    return null;
  }

  public void onCancel() {
  }

  public void onStop() {
  }
}