/*

  *   SONEWS News Server

  *   see AUTHORS for the list of contributors

  *

  *   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 3 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, see <http://www.gnu.org/licenses/>.

  */

 package org.sonews.daemon.command;

 import java.io.IOException;

 import org.sonews.daemon.NNTPConnection;

 /**

  * A default "Unsupported Command". Simply returns error code 500 and a

  * "command not supported" message.

  * @author Christian Lins

  * @since sonews/0.5.0

  */

 public class UnsupportedCommand implements Command

 {

   /**

    * @return Always returns null.

    */

   @Override

   public String[] getSupportedCommandStrings()

   {

     return null;

   }

   @Override

   public boolean hasFinished()

   {

     return true;

   }

   @Override

   public String impliedCapability()

   {

     return null;

   }

   @Override

   public boolean isStateful()

   {

     return false;

   }

   @Override

   public void processLine(NNTPConnection conn, final String line, byte[] raw)

     throws IOException

   {

     conn.println("500 command not supported");

   }

 }