source/ch/cyberduck/ui/cocoa/PreferencesControllerFactory.java

   1 package ch.cyberduck.ui.cocoa;
   2
   3 /*
   4  * Copyright (c) 2002-2013 David Kocher. All rights reserved.
   5  * http://cyberduck.ch/
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (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  * Bug fixes, suggestions and comments should be sent to feedback@cyberduck.ch
  18  */
  19
  20 import ch.cyberduck.binding.application.NSApplication;
  21
  22 /**
  23  * @version $Id$
  24  */
  25 public final class PreferencesControllerFactory {
  26
  27     private static PreferencesController shared = null;
  28
  29     private PreferencesControllerFactory() {
  30         //
  31     }
  32
  33     public static PreferencesController instance() {
  34         synchronized(NSApplication.sharedApplication()) {
  35             if(null == shared) {
  36                 shared = new PreferencesController() {
  37                     @Override
  38                     public void invalidate() {
  39                         shared = null;
  40                     }
  41                 };
  42             }
  43             return shared;
  44         }
  45     }
  46 }