Source for gnu.inet.util.GetLocalHostAction

   1: /*
   2:  * GetLocalHostAction.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.util;
  40: 
  41: import java.net.InetAddress;
  42: import java.net.UnknownHostException;
  43: import java.security.PrivilegedAction;
  44: 
  45: /**
  46:  * Privileged action to retrieve the local host InetAddress.
  47:  *
  48:  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  49:  */
  50: public class GetLocalHostAction
  51:   implements PrivilegedAction
  52: {
  53: 
  54:   public Object run()
  55:   {
  56:     try
  57:       {
  58:         return InetAddress.getLocalHost();
  59:       }
  60:     catch (UnknownHostException e)
  61:       {
  62:         return null;
  63:       }
  64:   }
  65:   
  66: }