consoleinput.java

google公司的用Java写的一个聊天软件的原代码

/***************************************************************************
 *   Copyright 2006-2008 by Christian Ihle                                 *
 *   [e-mail]                                                  *
 *                                                                         *
 *   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 net.usikkert.kouchat.ui.console;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import java.util.logging.Level;
import java.util.logging.Logger;

import net.usikkert.kouchat.misc.CommandException;
import net.usikkert.kouchat.misc.CommandParser;
import net.usikkert.kouchat.misc.Controller;
import net.usikkert.kouchat.misc.MessageController;
import net.usikkert.kouchat.ui.UserInterface;

/**
 * Contains the main input loop for the console mode.
 *
 * @author Christian Ihle
 */
public class ConsoleInput extends Thread
{
	private static final Logger LOG = Logger.getLogger( ConsoleInput.class.getName() );

	private final BufferedReader stdin;
	private final Controller controller;
	private final CommandParser cmdParser;
	private final MessageController msgController;

	/**
	 * Constructor. Initializes input from System.in.
	 *
	 * @param controller The controller to use.
	 * @param ui The user interface to send messages to.
	 */
	public ConsoleInput( final Controller controller, final UserInterface ui )
	{
		this.controller = controller;

		setName( "ConsoleInputThread" );
		msgController = ui.getMessageController();
		stdin = new BufferedReader( new InputStreamReader( System.in ) );
		cmdParser = new CommandParser( controller, ui );

		Runtime.getRuntime().addShutdownHook( new Thread( "ConsoleInputShutdownHook" )
		{
			public void run()
			{
				System.out.println( "Quitting - good bye!" );
			}
		} );
	}

	/**
	 * Starts a loop waiting for input.
	 * To stop the loop and exit the application, write /quit.
	 */
	public void run()
	{
		String input = "";

		while ( input != null && !input.startsWith( "/quit" ) )
		{
			try
			{
				input = stdin.readLine();

				if ( input != null && input.trim().length() > 0 )
				{
					if ( input.startsWith( "/" ) )
					{
						if ( !input.startsWith( "/quit" ) )
						{
							cmdParser.parse( input );
						}
					}

					else
					{
						try
						{
							controller.sendChatMessage( input );
							msgController.showOwnMessage( input );
						}

						catch ( final CommandException e )
						{
							msgController.showSystemMessage( e.getMessage() );
						}
					}
				}
			}

			catch ( final IOException e )
			{
				LOG.log( Level.SEVERE, e.toString(), e );
			}
		}

		System.exit( 0 );
	}
}