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Java > Open Source Codes > org > jfree > ui > ExtensionFileFilter


1 /* ========================================================================
2  * JCommon : a free general purpose class library for the Java(tm) platform
3  * ========================================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jcommon/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ------------------------
28  * ExtensionFileFilter.java
29  * ------------------------
30  * (C) Copyright 2000-2004, by Object Refinery Limited.
31  *
32  * Original Author: David Gilbert (for Object Refinery Limited);
33  * Contributor(s): -;
34  *
35  * $Id: ExtensionFileFilter.java,v 1.4 2005/11/16 15:58:41 taqua Exp $
36  *
37  * Changes (from 26-Oct-2001)
38  * --------------------------
39  * 26-Oct-2001 : Changed package to com.jrefinery.ui.* (DG);
40  * 26-Jun-2002 : Updated imports (DG);
41  * 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
42  *
43  */
44 package org.jfree.ui;
45
46 import java.io.File JavaDoc;
47
48 import javax.swing.filechooser.FileFilter JavaDoc;
49
50 /**
51  * A filter for JFileChooser that filters files by extension.
52  *
53  * @author David Gilbert
54  */
55 public class ExtensionFileFilter extends FileFilter JavaDoc {
56
57     /** A description for the file type. */
58     private String JavaDoc description;
59
60     /** The extension (for example, "png" for *.png files). */
61     private String JavaDoc extension;
62
63     /**
64      * Standard constructor.
65      *
66      * @param description a description of the file type;
67      * @param extension the file extension;
68      */
69     public ExtensionFileFilter(final String JavaDoc description, final String JavaDoc extension) {
70         this.description = description;
71         this.extension = extension;
72     }
73
74     /**
75      * Returns true if the file ends with the specified extension.
76      *
77      * @param file the file to test.
78      *
79      * @return A boolean that indicates whether or not the file is accepted by the filter.
80      */
81     public boolean accept(final File JavaDoc file) {
82
83         if (file.isDirectory()) {
84             return true;
85         }
86
87         final String JavaDoc name = file.getName().toLowerCase();
88         if (name.endsWith(this.extension)) {
89             return true;
90         }
91         else {
92             return false;
93         }
94
95     }
96
97     /**
98      * Returns the description of the filter.
99      *
100      * @return a description of the filter.
101      */
102     public String JavaDoc getDescription() {
103         return this.description;
104     }
105
106 }
107
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