Source for gnu.inet.nntp.ArticleNumberIterator

   1: /*
   2:  * ArticleNumberIterator.java
   3:  * Copyright (C) 2003 The Free Software Foundation
   4:  * 
   5:  * This file is part of GNU inetlib, a library.
   6:  * 
   7:  * GNU inetlib is free software; you can redistribute it and/or modify
   8:  * it under the terms of the GNU General Public License as published by
   9:  * the Free Software Foundation; either version 2 of the License, or
  10:  * (at your option) any later version.
  11:  * 
  12:  * GNU inetlib is distributed in the hope that it will be useful,
  13:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15:  * GNU General Public License for more details.
  16:  * 
  17:  * You should have received a copy of the GNU General Public License
  18:  * along with this library; if not, write to the Free Software
  19:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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:  * obliged to do so.  If you do not wish to do so, delete this
  36:  * exception statement from your version.
  37:  */
  38: 
  39: package gnu.inet.nntp;
  40: 
  41: import java.io.IOException;
  42: import java.util.NoSuchElementException;
  43: 
  44: /**
  45:  * An iterator over a listing of article numbers.
  46:  *
  47:  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  48:  */
  49: public class ArticleNumberIterator
  50:   extends LineIterator
  51: {
  52: 
  53:   ArticleNumberIterator(NNTPConnection connection)
  54:   {
  55:     super(connection);
  56:   }
  57: 
  58:   /**
  59:    * Returns the next article number.
  60:    */
  61:   public Object next()
  62:   {
  63:     try
  64:       {
  65:         return new Integer(nextArticleNumber());
  66:       }
  67:     catch (IOException e)
  68:       {
  69:         throw new NoSuchElementException("I/O error: " + e.getMessage());
  70:       }
  71:   }
  72: 
  73:   /**
  74:    * Returns the next article number.
  75:    */
  76:   public int nextArticleNumber()
  77:     throws IOException
  78:   {
  79:     String line = nextLine();
  80:     return Integer.parseInt(line.trim());
  81:   }
  82: 
  83: }