/*

  * Licensed to the Apache Software Foundation (ASF) under one or more

  * contributor license agreements.  See the NOTICE file distributed with

  * this work for additional information regarding copyright ownership.

  * The ASF licenses this file to You 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 org.apache.commons.pipeline;

 import java.util.EventListener;

 import java.util.EventObject;

 /**

  * Listener interface for {@link EventObject}s. Listeners are notified of

  * events by the {@link StageContext} with which they are registered.

  */

 public interface StageEventListener extends EventListener {

     /**

      * Notify this listener of a {@link StageEvent}

      * @param ev The event to be handled. Listeners should gracefully ignore any events that they

      * do not know how to handle.

      */

     public abstract void notify(EventObject ev);

 }