1 /********************************************************************************
2 * InternetCafe is a software solution that helps the management of Cybercafes
3 * according with the ITALIAN DECREE LAW ON ANTI-TERROR MEASURES, 27 JULY 2005.
4 * Copyright (C) 2006 Guido Angelo Ingenito
5
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 *******************************************************************************/
20 package ui.util;
21
22 import java.io.File;
23 import java.io.FilenameFilter;
24
25 import javax.swing.filechooser.FileFilter;
26
27 public class FileExtensionFilter extends FileFilter implements FilenameFilter {
28
29 /***
30 * Comment for <code>extension</code> The file's extension.
31 */
32 private final String extension;
33
34 /***
35 * Comment for <code>description</code> The extension's descriptor, eg.
36 * "xml" = eXtensible MarkUp Language.
37 */
38 private String description = "";
39
40 /***
41 * Comment for <code>DOT</code> It stores the static value for the dot:
42 * ".".
43 */
44 private static String DOT = ".";
45
46 /***
47 * @param extension
48 * The file's extension;
49 */
50 public FileExtensionFilter(String extension) {
51 this.extension = extension.toLowerCase();
52 }
53
54 /***
55 * @param extension
56 * The file's extension;
57 * @param description
58 * The file extension's description.
59 */
60 public FileExtensionFilter(String extension, String description) {
61 this.extension = extension.toLowerCase();
62 this.description = description;
63 }
64
65
66
67
68
69
70 public boolean accept(File file, String extension) {
71 return extension.endsWith(this.extension.toLowerCase())
72 || extension.endsWith(this.extension.toUpperCase());
73 }
74
75 public boolean validExtension(String extension) {
76 return extension.startsWith(DOT)
77 && (extension.endsWith(this.extension.toLowerCase()) || extension
78 .endsWith(this.extension.toUpperCase()));
79 }
80
81 /***
82 * @return Returns the extension.
83 */
84 public String getExtension() {
85 return extension;
86 }
87
88 /***
89 * This method just adds a DOT to the extension and returns it.
90 *
91 * @return Returns the dotted extension, eg. ".jpeg" or ".xml".
92 */
93 public String getDottedExtension() {
94 return DOT + extension;
95 }
96
97 @Override
98 public boolean accept(File file) {
99 if (file.isDirectory())
100 return true;
101 if (!file.getName().contains(DOT))
102 return false;
103 int dotIndex = file.getName().indexOf(DOT);
104 int length = file.getName().length();
105 return validExtension(file.getName().substring(dotIndex, length));
106 }
107
108 @Override
109 public String getDescription() {
110 return description.equals("") ? extension.toUpperCase() : description;
111 }
112
113 /***
114 * @param description
115 * The description to set.
116 */
117 public void setDescription(String description) {
118 this.description = description;
119 }
120
121 }