/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
/*
 * Copyright (c) 2011 University of California, Los Angeles
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
 */

#ifndef _CCNB_PARSER_VISITOR_H_
#define _CCNB_PARSER_VISITOR_H_

#include "../common.h"
#include <boost/any.hpp>

namespace ns3 {
namespace ndn {
namespace CcnbParser {

/**
 * \ingroup ccnx-ccnb
 * \brief Visitor interface that takes one boost::any argument and returns boost::any
 *
 * \see http://www.ccnx.org/releases/latest/doc/technical/BinaryEncoding.html
 * for ccnb encoding format help
 */
class Visitor
{
public:
  virtual boost::any visit (Blob&,  boost::any)=0; ///< \brief Method accepting BLOB block  
  virtual boost::any visit (Udata&, boost::any)=0; ///< \brief Method accepting UDATA block 
  virtual boost::any visit (Tag&,   boost::any)=0; ///< \brief Method accepting TAG block   
  virtual boost::any visit (Attr&,  boost::any)=0; ///< \brief Method accepting ATTR block  
  virtual boost::any visit (Dtag&,  boost::any)=0; ///< \brief Method accepting DTAG block  
  virtual boost::any visit (Dattr&, boost::any)=0; ///< \brief Method accepting DATTR block 
  virtual boost::any visit (Ext&,   boost::any)=0; ///< \brief Method accepting EXT block

  virtual ~Visitor () { }
};                                                
                                                  
}
}
}                                                 
                                                  
#endif // _CCNB_PARSER_VISITOR_H_