2.4/dev/core/src/com/google/gwt/dev/util/Callback.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.dev.util;

/**
 * Generic callback interface.
 * 
 * @param <T> the type of the expected result
 */
public interface Callback<T> {
  /**
   * Called when an operation completes normally.
   * 
   * @param result the result of the operation
   */
  void onDone(T result);

  /**
   * Called when the task fails to complete.
   * 
   * @param t the error thrown from the operation
   */
  void onError(Throwable t);
}