FileExtensionFilter


1   /*
2    * Copyright (c) 2003 - 2007 OpenSubsystems s.r.o. Slovak Republic. All rights reserved.
3    * 
4    * Project: OpenSubsystems
5    * 
6    * $Id: FileExtensionFilter.java,v 1.4 2007/01/07 06:14:00 bastafidli Exp $
7    * 
8    * This program is free software; you can redistribute it and/or modify
9    * it under the terms of the GNU General Public License as published by
10   * the Free Software Foundation; version 2 of the License. 
11   * 
12   * This program is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   * GNU General Public License for more details.
16   * 
17   * You should have received a copy of the GNU General Public License
18   * along with this program; if not, write to the Free Software
19   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
20   */
21  
22  package org.opensubsystems.core.util;
23  
24  import java.io.File  ;
25  import java.io.FileFilter  ;
26  
27  import org.opensubsystems.core.www.WebCommonConstants;
28  
29  /**
30   * Description: Class to filter web supported images (.JPG).
31   * 
32   * @version $Id: FileExtensionFilter.java,v 1.4 2007/01/07 06:14:00 bastafidli Exp $
33   * @author Miro Halas
34   * @code.reviewer Miro Halas
35   * @code.reviewed 1.2 2004/12/18 06:18:25 bastafidli
36   */
37  public class FileExtensionFilter implements FileFilter  
38  {
39     // Cached values ////////////////////////////////////////////////////////////
40     
41     /**
42      * Shared file filter instance.
43      */
44     public static final FileFilter   JPEG_IMAGE_FILTER 
45                                         = new FileExtensionFilter(
46                                                   WebCommonConstants.JPEG_IMAGE_EXTENSION);
47  
48     // Attributes ///////////////////////////////////////////////////////////////
49     
50     /**
51      * File extension to filter on.
52      */
53     protected String   m_strExtension;
54  
55     // Constructors /////////////////////////////////////////////////////////////
56     
57     /**
58      * Create new  FileExtensionFilter
59      * 
60      * @param strExtension - extenstion to filter on
61      */
62     public FileExtensionFilter(
63        String   strExtension
64     )
65     {
66        assert strExtension != null : "Extension cannot be null";
67        m_strExtension = strExtension;
68     }
69  
70     // Public methods ///////////////////////////////////////////////////////////
71     
72     /**
73      * Test if the found file matches the filter.
74      *
75      * @param  flPathName - file to test
76      * @return true - if file matches the filter
77      */
78     public boolean accept(
79        File   flPathName
80     )
81     {
82        return flPathName.isFile()
83               &&  flPathName.getName().toLowerCase().endsWith(m_strExtension);
84     }
85  }
86
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