1 //----------------------------------------------------------------------
2 //
3 // PerfectJPattern: "Design patterns are good but components are better!"
4 // AntiqueClock.java Copyright (c) 2009 Giovanni Azua Garcia
5 // bravegag@hotmail.com
6 //
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License
9 // as published by the Free Software Foundation; either version 3
10 // of the License, or (at your option) any later version.
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, see <http://www.gnu.org/licenses/>.
19 //
20 //----------------------------------------------------------------------
21 package org.perfectjpattern.core.behavioral.observer;
22
23 import java.text.*;
24 import java.util.*;
25
26 import org.perfectjpattern.core.api.behavioral.observer.*;
27 import org.slf4j.*;
28
29 /**
30 * Antique Clock is introduced as example use-case where you want to target
31 * as Observer a third-party library for which there is no access to its
32 * source code and therefore it can't be modified to implement
33 * {@link IObserver} i.e. not possible to abstract couple it to
34 * PerfectJPattern's
35 *
36 * @author <a href="mailto:bravegag@hotmail.com">Giovanni Azua</a>
37 * @version $Revision: 1.0 $Date: Jun 16, 2008 10:36:05 PM $
38 */
39 public final
40 class AntiqueClock
41 {
42 //------------------------------------------------------------------------
43 // public
44 //------------------------------------------------------------------------
45 public static void
46 displayTime(Date aDate)
47 {
48 SimpleDateFormat myFormat = new SimpleDateFormat("dd.MM.yyyy HH:mm:ss");
49
50 theLogger.debug("Antique clock works too! " + myFormat.format(aDate));
51 }
52
53 //------------------------------------------------------------------------
54 // protected
55 //------------------------------------------------------------------------
56 protected static void
57 setLogger(Logger aLogger)
58 {
59 theLogger = aLogger;
60 }
61
62 //------------------------------------------------------------------------
63 // private
64 //------------------------------------------------------------------------
65 private
66 AntiqueClock()
67 {
68 // empty
69 }
70
71 //------------------------------------------------------------------------
72 // members
73 //------------------------------------------------------------------------
74 /**
75 * Provides logging facilities for this class
76 */
77 private static Logger theLogger = LoggerFactory.getLogger(AntiqueClock.
78 class);
79 }