Source for gnu.java.util.prefs.MemoryBasedFactory

   1: /* MemoryBasedFactory - Memory based PreferencesFactory usefull for testing
   2:    Copyright (C) 2001 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package gnu.java.util.prefs;
  39: 
  40: import java.util.prefs.*;
  41: 
  42: /**
  43:  * Memory based PreferencesFactory useful for testing.
  44:  * Returns completely empty Preferences for system and user roots.
  45:  * All changes are only backed by the current instances in memory.
  46:  *
  47:  * @author Mark Wielaard (mark@klomp.org)
  48:  */
  49: public class MemoryBasedFactory implements PreferencesFactory {
  50: 
  51:     // Static fields containing the preferences root nodes
  52:     private static final Preferences systemPreferences
  53:         = new MemoryBasedPreferences(null, "", false);
  54:     private static final Preferences userPreferences
  55:         = new MemoryBasedPreferences(null, "", true);
  56: 
  57:     public Preferences systemRoot() {
  58:         return systemPreferences;
  59:     }
  60: 
  61:     public Preferences userRoot() {
  62:         return userPreferences;
  63:     }
  64: }