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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    * 
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.vfs;
18  
19  /***
20   * Listens for changes to a file.
21   *
22   * @author <a href="mailto:adammurdoch@apache.org">Adam Murdoch</a>
23   * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
24   */
25  public interface FileListener
26  {
27      /***
28       * Called when a file is created.
29       */
30      void fileCreated(FileChangeEvent event) throws Exception;
31  
32      /***
33       * Called when a file is deleted.
34       */
35      void fileDeleted(FileChangeEvent event) throws Exception;
36  
37      /***
38       * Called when a file is changed.<br />
39       * This will only happen if you monitor the file using {@link FileMonitor}.
40       */
41      void fileChanged(FileChangeEvent event) throws Exception;
42  }