/*

  * Copyright 1999-2001,2004 The Apache Software Foundation.

  * 

  * 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 org.apache.commons.workflow;

 import java.util.EventListener;

 /**

  * A <strong>ScopeListener</strong> registers its interest in receiving

  * <code>ScopeEvent</code> notifications when the occur on a particular

  * <code>Scope</code> of interest.

  *

  * @version $Revision: 155475 $ $Date: 2005-02-26 13:31:11 +0000 (Sat, 26 Feb 2005) $

  * @author Craig R. McClanahan

  */

 public interface ScopeListener extends EventListener {

     // --------------------------------------------------------- Public Methods

     /**

      * Invoked when a new bean was added to this <code>scope</code>.

      *

      * @param event The <code>ScopeEvent</code> that has occurred

      */

     public void beanAdded(ScopeEvent event);

     /**

      * Invoked when an existing bean was removed in this <code>scope</code>.

      *

      * @param event The <code>ScopeEvent</code> that has occurred

      */

     public void beanRemoved(ScopeEvent event);

     /**

      * Invoked when an existing bean was replaced in this <code>scope</code>.

      *

      * @param event The <code>ScopeEvent</code> that has occurred

      */

     public void beanReplaced(ScopeEvent event);

     /**

      * Invoked when the entire Scope is cleared.

      *

      * @param event The <code>ScopeEvent</code> that has occurred

      */

     public void scopeCleared(ScopeEvent event);

 }