Source for gnu.javax.security.auth.callback.DefaultCallbackHandler

   1: /* DefaultCallbackHandler.java --
   2:    Copyright (C) 2004, 2006 Free Software Foundation, Inc.
   3: 
   4: This file is a 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 of the License, or (at
   9: your option) 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; if not, write to the Free Software
  18: Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
  19: 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: 
  39: package gnu.javax.security.auth.callback;
  40: 
  41: import java.util.Locale;
  42: 
  43: import javax.security.auth.callback.ChoiceCallback;
  44: import javax.security.auth.callback.ConfirmationCallback;
  45: import javax.security.auth.callback.LanguageCallback;
  46: import javax.security.auth.callback.NameCallback;
  47: import javax.security.auth.callback.PasswordCallback;
  48: import javax.security.auth.callback.TextInputCallback;
  49: import javax.security.auth.callback.TextOutputCallback;
  50: 
  51: /**
  52:  * This trivial implementation of {@link CallbackHandler} sets its
  53:  * {@link Callback} arguments to default values, with no user interaction.
  54:  */
  55: public class DefaultCallbackHandler extends AbstractCallbackHandler
  56: {
  57: 
  58:   // Constructor.
  59:   // -------------------------------------------------------------------------
  60: 
  61:   public DefaultCallbackHandler()
  62:   {
  63:     super("DEFAULT");
  64:   }
  65: 
  66:   // Instance methods.
  67:   // -------------------------------------------------------------------------
  68: 
  69:   protected void handleChoice(ChoiceCallback c)
  70:   {
  71:     c.setSelectedIndex(c.getDefaultChoice());
  72:   }
  73: 
  74:   protected void handleConfirmation(ConfirmationCallback c)
  75:   {
  76:     if (c.getOptionType() == ConfirmationCallback.YES_NO_OPTION)
  77:       c.setSelectedIndex(ConfirmationCallback.NO);
  78:     else if (c.getOptionType() == ConfirmationCallback.YES_NO_CANCEL_OPTION)
  79:       c.setSelectedIndex(ConfirmationCallback.NO);
  80:     else if (c.getOptionType() == ConfirmationCallback.OK_CANCEL_OPTION)
  81:       c.setSelectedIndex(ConfirmationCallback.OK);
  82:     else
  83:       c.setSelectedIndex(c.getDefaultOption());
  84:   }
  85: 
  86:   protected void handleLanguage(LanguageCallback c)
  87:   {
  88:     c.setLocale(Locale.getDefault());
  89:   }
  90: 
  91:   protected void handleName(NameCallback c)
  92:   {
  93:     c.setName(System.getProperty("user.name"));
  94:   }
  95: 
  96:   protected void handlePassword(PasswordCallback c)
  97:   {
  98:     c.setPassword(new char[0]);
  99:   }
 100: 
 101:   protected void handleTextInput(TextInputCallback c)
 102:   {
 103:     c.setText("");
 104:   }
 105: 
 106:   protected void handleTextOutput(TextOutputCallback c)
 107:   {
 108:   }
 109: }