01: //The contents of this file are subject to the Mozilla Public License Version 1.1
02: //(the "License"); you may not use this file except in compliance with the
03: //License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
04: //
05: //Software distributed under the License is distributed on an "AS IS" basis,
06: //WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
07: //for the specific language governing rights and
08: //limitations under the License.
09: //
10: //The Original Code is "The Columba Project"
11: //
12: //The Initial Developers of the Original Code are Frederik Dietz and Timo Stich.
13: //Portions created by Frederik Dietz and Timo Stich are Copyright (C) 2003.
14: //
15: //All Rights Reserved.
16: package org.columba.mail.folder.mh;
17:
18: import java.io.File;
19: import java.io.FileFilter;
20: import java.util.regex.Matcher;
21: import java.util.regex.Pattern;
22:
23: /**
24: * @author timo
25: *
26: * To change this generated comment edit the template variable "typecomment":
27: * Window>Preferences>Java>Templates.
28: * To enable and disable the creation of type comments go to
29: * Window>Preferences>Java>Code Generation.
30: */
31: public class MHMessageFileFilter implements FileFilter {
32: private static final Pattern filePattern = Pattern
33: .compile("[0-9]+");
34: protected static MHMessageFileFilter myInstance;
35: private Matcher matcher;
36:
37: protected MHMessageFileFilter() {
38: matcher = filePattern.matcher("");
39: }
40:
41: public static MHMessageFileFilter getInstance() {
42: if (myInstance == null) {
43: myInstance = new MHMessageFileFilter();
44: }
45:
46: return myInstance;
47: }
48:
49: /**
50: * @see java.io.FileFilter#accept(java.io.File)
51: */
52: public boolean accept(File arg0) {
53: matcher.reset(arg0.getName());
54:
55: return (arg0.isFile()) && matcher.matches();
56: }
57: }
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