Subversion Repositories openrisc

/* ConsoleCallbackHandler.java --

   Copyright (C) 2005, 2006  Free Software Foundation, Inc.

This file is a part of GNU Classpath.

GNU Classpath 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.

GNU Classpath 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 GNU Classpath; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301

USA

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version.  */

package gnu.javax.security.auth.callback;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.IOException;

import java.io.PrintStream;

import java.util.Iterator;

import java.util.Locale;

import java.util.StringTokenizer;

import java.util.TreeSet;

import javax.security.auth.callback.ChoiceCallback;

import javax.security.auth.callback.ConfirmationCallback;

import javax.security.auth.callback.LanguageCallback;

import javax.security.auth.callback.NameCallback;

import javax.security.auth.callback.PasswordCallback;

import javax.security.auth.callback.TextInputCallback;

import javax.security.auth.callback.TextOutputCallback;

/**

 * An implementation of {@link CallbackHandler} that reads and writes

 * information to and from <code>System.in</code> and <code>System.out</code>.

 */

public class ConsoleCallbackHandler extends AbstractCallbackHandler

{

  // Fields.

  // -------------------------------------------------------------------------

  private final PrintStream out;

  // Constructors.

  // -------------------------------------------------------------------------

  public ConsoleCallbackHandler()

  {

    this (System.out);

  }

  public ConsoleCallbackHandler (final PrintStream out)

  {

    super ("CONSOLE");

    this.out = out;

  }

  // Instance methods.

  // -------------------------------------------------------------------------

  protected void handleChoice(ChoiceCallback c) throws IOException

  {

    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

    out.println(c.getPrompt());

    out.print('(');

    String[] choices = c.getChoices();

    for (int i = 0; i < choices.length; i++)

      {

        out.print(choices[i]);

        if (i != choices.length - 1)

          out.print(", ");

      }

    out.print(") ");

    if (c.getDefaultChoice() >= 0 && c.getDefaultChoice() < choices.length)

      {

        out.print('[');

        out.print(choices[c.getDefaultChoice()]);

        out.print("] ");

      }

    String reply = in.readLine();

    if (reply == null || reply.length() == 0)

      {

        c.setSelectedIndex(c.getDefaultChoice());

        return;

      }

    if (!c.allowMultipleSelections())

      {

        for (int i = 0; i < choices.length; i++)

          {

            if (reply.trim().equals(choices[i]))

              {

                c.setSelectedIndex(i);

                return;

              }

          }

        c.setSelectedIndex(c.getDefaultChoice());

      }

    else

      {

        TreeSet indices = new TreeSet();

        StringTokenizer tok = new StringTokenizer(reply, ",");

        String[] replies = new String[tok.countTokens()];

        int idx = 0;

        while (tok.hasMoreTokens())

          {

            replies[idx++] = tok.nextToken().trim();

          }

        for (int i = 0; i < choices.length; i++)

          for (int j = 0; j < replies.length; i++)

            {

              if (choices[i].equals(replies[j]))

                {

                  indices.add(Integer.valueOf(i));

                }

            }

        if (indices.size() == 0)

          c.setSelectedIndex(c.getDefaultChoice());

        else

          {

            int[] ii = new int[indices.size()];

            int i = 0;

            for (Iterator it = indices.iterator(); it.hasNext(); )

              ii[i++] = ((Integer) it.next()).intValue();

            c.setSelectedIndexes(ii);

          }

      }

  }

  protected void handleConfirmation(ConfirmationCallback c) throws IOException

  {

    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

    if (c.getPrompt() != null)

      out.print(c.getPrompt());

    String[] choices = null;

    int[] values = null;

    switch (c.getOptionType())

      {

      case ConfirmationCallback.OK_CANCEL_OPTION:

        out.print(messages.getString("callback.okCancel"));

        choices = new String[] {

          messages.getString("callback.ok"),

          messages.getString("callback.cancel"),

          messages.getString("callback.shortOk"),

          messages.getString("callback.shortCancel")

        };

        values = new int[] {

          ConfirmationCallback.OK, ConfirmationCallback.CANCEL,

          ConfirmationCallback.OK, ConfirmationCallback.CANCEL

        };

        break;

      case ConfirmationCallback.YES_NO_CANCEL_OPTION:

        out.print(messages.getString("callback.yesNoCancel"));

        choices = new String[] {

          messages.getString("callback.yes"),

          messages.getString("callback.no"),

          messages.getString("callback.cancel"),

          messages.getString("callback.shortYes"),

          messages.getString("callback.shortNo"),

          messages.getString("callback.shortCancel")

        };

        values = new int[] {

          ConfirmationCallback.YES, ConfirmationCallback.NO,

          ConfirmationCallback.CANCEL, ConfirmationCallback.YES,

          ConfirmationCallback.NO, ConfirmationCallback.CANCEL

        };

        break;

      case ConfirmationCallback.YES_NO_OPTION:

        out.print(messages.getString("callback.yesNo"));

        choices = new String[] { messages.getString("callback.yes"),

                                 messages.getString("callback.no"),

                                 messages.getString("callback.shortYes"),

                                 messages.getString("callback.shortNo") };

        values = new int[] { ConfirmationCallback.YES,

                             ConfirmationCallback.NO,

                             ConfirmationCallback.YES,

                             ConfirmationCallback.NO };

        int defaultOption = c.getDefaultOption();

        if (defaultOption > -1 && defaultOption < choices.length)

          {

            out.print("[");

            out.print(choices[defaultOption]);

            out.print("] ");

          }

        break;

      case ConfirmationCallback.UNSPECIFIED_OPTION:

        choices = c.getOptions();

        values = new int[choices.length];

        for (int i = 0; i < values.length; i++)

          values[i] = i;

        out.print('(');

        for (int i = 0; i < choices.length; i++)

          {

            out.print(choices[i]);

            if (i != choices.length - 1)

              out.print(", ");

          }

        out.print(") [");

        out.print(choices[c.getDefaultOption()]);

        out.print("] ");

        break;

      default:

        throw new IllegalArgumentException();

      }

    String reply = in.readLine();

    if (reply == null)

      {

        c.setSelectedIndex(c.getDefaultOption());

        return;

      }

    reply = reply.trim();

    for (int i = 0; i < choices.length; i++)

      if (reply.equalsIgnoreCase(choices[i]))

        {

          c.setSelectedIndex(values[i]);

          return;

        }

    c.setSelectedIndex(c.getDefaultOption());

  }

  protected void handleLanguage(LanguageCallback c) throws IOException

  {

    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

    out.print(messages.getString("callback.language"));

    String reply = null;

    reply = in.readLine();

    if (reply == null)

      {

        c.setLocale(Locale.getDefault());

      }

    else

      {

        c.setLocale(new Locale(reply.trim()));

      }

  }

  protected void handleName(NameCallback c) throws IOException

  {

    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

    out.print(c.getPrompt());

    String name = in.readLine();

    if (name != null)

      c.setName(name.trim());

  }

  protected void handlePassword(PasswordCallback c) throws IOException

  {

    out.print(c.getPrompt());

    BufferedReader in =

      new BufferedReader(new InputStreamReader(System.in));

    String pass = in.readLine();

    c.setPassword(pass.toCharArray());

  }

  protected void handleTextInput(TextInputCallback c) throws IOException

  {

    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

    out.print(c.getPrompt());

    String text = in.readLine();

    if (text != null)

      c.setText(text);

  }

  protected void handleTextOutput(TextOutputCallback c)

  {

    out.print(c.getMessage());

  }

}