PasswordApplet.java

/*

   PasswordApplet.java

   A simple password change utility in applet form.

   Created: 28 January 1998

   Module By: Michael Mulvaney

   -----------------------------------------------------------------------

   Ganymede Directory Management System

   Copyright (C) 1996 - 2004
   The University of Texas at Austin

   Contact information

   Author Email: ganymede_author@arlut.utexas.edu
   Email mailing list: ganymede@arlut.utexas.edu

   US Mail:

   Computer Science Division
   Applied Research Laboratories
   The University of Texas at Austin
   PO Box 8029, Austin TX 78713-8029

   Telephone: (512) 835-3200

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA

*/

package arlut.csd.ganymede.client.password;

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Component;
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/*------------------------------------------------------------------------------
                                                                           class
                                                                  PasswordApplet

------------------------------------------------------------------------------*/

public class PasswordApplet extends Applet implements ActionListener{

  PasswordClient
    client;

  TextField
    usernameField = new TextField(10),
    oldPasswordField = new TextField(10),
    newPasswordField1 = new TextField(10),
    newPasswordField2 = new TextField(10);

  Button
    okB = null,
    change = new Button("Change Password");

  Dialog d = null;
  Label dLabel;

  GridBagLayout
    gbl;

  GridBagConstraints
    gbc;

  String serverhost;

  /* -- */

  public void init()
  {
    serverhost = getParameter("ganymede.serverhost");

    if (serverhost == null || serverhost.equals(""))
      {
        serverhost = getCodeBase().getHost();
      }

    try
      {
        client = new PasswordClient("//" + serverhost + "/ganymede.server");
      }
    catch (java.rmi.RemoteException rx)
      {
        add(new Label("Could not login to server:" + rx));
        return;
      }

    setLayout(new BorderLayout());

    Panel panel = new Panel();
    add("Center", panel);

    gbl = new GridBagLayout();
    gbc = new GridBagConstraints();

    gbc.anchor = GridBagConstraints.NORTHWEST;
    gbc.insets = new Insets(2,2,2,2);

    panel.setLayout(gbl);

    gbc.gridx = 0;
    gbc.gridy = 0;
    Label u = new Label("Username:");
    gbl.setConstraints(u, gbc);
    panel.add(u);
    gbc.gridx = 1;
    gbl.setConstraints(usernameField, gbc);
    panel.add(usernameField);

    gbc.gridx = 0;
    gbc.gridy = 1;

    Label op = new Label("Current Password:");
    gbl.setConstraints(op, gbc);
    panel.add(op);

    gbc.gridx = 1;
    gbl.setConstraints(oldPasswordField, gbc);
    oldPasswordField.setEchoChar('*');
    panel.add(oldPasswordField);

    gbc.gridx = 0;
    gbc.gridy = 2;

    Label np = new Label("New Password:");
    gbl.setConstraints(np, gbc);
    panel.add(np);
    gbc.gridx = 1;
    gbl.setConstraints(newPasswordField1, gbc);
    newPasswordField1.setEchoChar('*');
    panel.add(newPasswordField1);

    gbc.gridx = 0;
    gbc.gridy = 3;
    Label ver = new Label("Verify:");
    gbl.setConstraints(ver, gbc);
    panel.add(ver);
    gbc.gridx = 1;
    gbl.setConstraints(newPasswordField2, gbc);
    newPasswordField2.setEchoChar('*');
    panel.add(newPasswordField2);

    change.addActionListener(this);
    add("South", change);

    System.out.println(getPreferredSize());
  }

  public void actionPerformed(ActionEvent e)
  {
    boolean ok = false;

    if (newPasswordField2.getText().equals(newPasswordField1.getText()))
      {
        ok = client.changePassword(usernameField.getText(), oldPasswordField.getText(), newPasswordField2.getText());
      }
    else
      {
        System.out.println("New passwords are not the smae");
        displayDialog("New passwords are not the same.");
      }

    if (ok)
      {
        System.out.println("Password change successful.");
        displayDialog("Password change successful.");

        oldPasswordField.setText("");
        newPasswordField1.setText("");
        newPasswordField2.setText("");
      }
    else
      {
        displayDialog("Password change failed.");
      }
  }

  public void displayDialog(String message)
  {
    if (d == null)
      {
        Component frame = getParent();

        while (!(frame instanceof Frame))
          {
            frame = ((Component)frame).getParent();
          }

        d = new Dialog((Frame)frame, "Password change");

        d.setLayout(new BorderLayout());

        dLabel = new Label(message);
        d.add("Center", dLabel);

        okB = new Button("ok");
        okB.addActionListener(new ActionListener () {
          public void actionPerformed(ActionEvent e)
            {
              d.setVisible(false);
            }});
        Panel okP = new Panel();
        okP.add(okB);
        d.add("South", okP);
      }
    else
      {
        dLabel.setText(message);
      }

    d.pack();

    d.setVisible(true);
  }
}