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  1. /*
  2.  * Copyright (c) 2010, Manuel Mausz. All rights reserved.
  3.  *
  4.  * Redistribution and use in source and binary forms, with or without
  5.  * modification, are permitted provided that the following conditions
  6.  * are met:
  7.  *
  8.  *   - Redistributions of source code must retain the above copyright
  9.  *     notice, this list of conditions and the following disclaimer.
  10.  *
  11.  *   - Redistributions in binary form must reproduce the above copyright
  12.  *     notice, this list of conditions and the following disclaimer in the
  13.  *     documentation and/or other materials provided with the distribution.
  14.  *
  15.  *   - The names of the authors may not be used to endorse or promote products
  16.  *     derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  19.  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  20.  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  21.  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  22.  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  23.  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  24.  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  25.  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  26.  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27.  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28.  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29.  */
  30.  
  31. import java.io.InputStreamReader;
  32. import java.io.BufferedReader;
  33. import java.io.InputStream;
  34. import java.io.IOException;
  35.  
  36. /*
  37.  * Allows you to easily setup a interactive console application
  38.  * Register commands in ctor and invoke run() afterwards
  39.  * Reads line-based
  40.  *
  41.  * @author Manuel Mausz (0728348)
  42.  */
  43. public abstract class CommandInteractive
  44. {
  45.   private boolean stop = false;
  46.   private boolean onecommand = false;
  47.   protected CommandHandler cmdHandler;
  48.  
  49.   /*--------------------------------------------------------------------------*/
  50.  
  51.   public CommandInteractive()
  52.   {
  53.     cmdHandler = new CommandHandler();
  54.   }
  55.  
  56.   /*--------------------------------------------------------------------------*/
  57.  
  58.   public void setOneCommandMode(boolean mode)
  59.   {
  60.     onecommand = mode;
  61.   }
  62.  
  63.   /*--------------------------------------------------------------------------*/
  64.  
  65.   public void stop()
  66.   {
  67.     stop = true;
  68.   }
  69.  
  70.   /*--------------------------------------------------------------------------*/
  71.  
  72.   public void printPrompt()
  73.   {}
  74.  
  75.   /*--------------------------------------------------------------------------*/
  76.  
  77.   public void run(InputStream in)
  78.     throws IOException
  79.   {
  80.     BufferedReader stream = new BufferedReader(new InputStreamReader(in));
  81.     String input;
  82.  
  83.     printPrompt();
  84.     while(!stop && (input = stream.readLine()) != null)
  85.     {
  86.       if (input.length() > 0)
  87.       {
  88.         String[] pieces = input.split("\\s+");
  89.         String[] args = new String[pieces.length - 1];
  90.         System.arraycopy(pieces, 1, args, 0, pieces.length - 1);
  91.         cmdHandler.call(pieces[0], args);
  92.       }
  93.  
  94.       if (onecommand)
  95.         stop();
  96.  
  97.       if (!stop)
  98.         printPrompt();
  99.     }
  100.   }
  101. }
  102.