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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  
18  package org.apache.commons.jci.listeners;
19  
20  import java.io.File;
21  
22  import org.apache.commons.jci.monitor.FilesystemAlterationObserver;
23  
24  /**
25   * The most simple implemenation of an FilesystemAlterationListener.
26   * 
27   * @author tcurdt
28   */
29  public class FileChangeListener extends AbstractFilesystemAlterationListener {
30  
31      private boolean changed;
32      
33      public boolean hasChanged() {
34          return changed;
35      }
36      
37      @Override
38      public void onStart( final FilesystemAlterationObserver pObserver ) {
39          changed = false;
40          super.onStart(pObserver);
41      }
42  
43      @Override
44      public void onStop( final FilesystemAlterationObserver pObserver ) {
45          super.onStop(pObserver);
46      }
47  
48      
49      @Override
50      public void onFileChange( final File pFile ) {
51          changed = true;
52      }
53  
54  
55      @Override
56      public void onFileCreate( final File pFile ) {
57          changed = true;
58      }
59  
60  
61      @Override
62      public void onFileDelete( final File pFile ) {
63          changed = true;
64      }
65  
66  
67      @Override
68      public void onDirectoryChange( final File pDir ) {
69      }
70  
71      @Override
72      public void onDirectoryCreate( final File pDir ) {
73      }
74  
75      @Override
76      public void onDirectoryDelete( final File pDir ) {
77      }
78      
79  }