/**
    * This file is part of Waarp Project.
    * 
    * Copyright 2009, Frederic Bregier, and individual contributors by the @author tags. See the
    * COPYRIGHT.txt in the distribution for a full listing of individual contributors.
    * 
    * All Waarp Project 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.
   * 
   * Waarp 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 Waarp . If not, see
   * <http://www.gnu.org/licenses/>.
   */
  package org.waarp.ftp.core.command.internal;
  
  import org.waarp.common.command.ReplyCode;
  import org.waarp.common.command.exception.Reply503Exception;
  import org.waarp.common.logging.WaarpLogger;
  import org.waarp.common.logging.WaarpLoggerFactory;
  import org.waarp.ftp.core.command.AbstractCommand;
  import org.waarp.ftp.core.command.FtpCommandCode;
  import org.waarp.ftp.core.command.info.NOOP;
  
  /**
   * Incorrect command
   * 
   * @author Frederic Bregier
   * 
   */
  public class IncorrectCommand extends AbstractCommand {
      /**
       * Internal Logger
       */
      private static final WaarpLogger logger = WaarpLoggerFactory
              .getLogger(IncorrectCommand.class);
  
      @Override
      public void exec() throws Reply503Exception {
          getSession().setReplyCode(
                  ReplyCode.REPLY_503_BAD_SEQUENCE_OF_COMMANDS,
                  "Bas sequence of commands: " + getCommand() + " following " +
                          getSession().getPreviousCommand().getCommand());
          logger.warn(getSession().getAnswer());
          if (getSession().getPreviousCommand().getCode() != FtpCommandCode.Connection &&
                  getSession().getPreviousCommand().getCode() != FtpCommandCode.PASS &&
                  getSession().getPreviousCommand().getCode() != FtpCommandCode.USER) {
              getSession().setNextCommand(new NOOP(getSession()));
          } else {
              invalidCurrentCommand();
          }
          throw new Reply503Exception(getSession().getReplyCode().getMesg());
      }
  }