/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/**
 * Copyright (C) 2013 Regents of the University of California.
 * @author: Jeff Thompson <jefft0@remap.ucla.edu>
 * See COPYING for copyright and distribution information.
 */

#ifndef NDN_ELEMENT_LISTENER_HPP
#define NDN_ELEMENT_LISTENER_HPP

#include "../c/encoding/element-listener.h"

namespace ndn {

/**
 * An ElementListener extends an ndn_ElementListener struct to proved an abstract virtual onReceivedElement function which wraps
 * the onReceivedElement used by the ndn_ElementListener struct.  You must extend this class to override onReceivedElement.
 */
class ElementListener : public ndn_ElementListener {
public:
  ElementListener() 
  {
    ndn_ElementListener_initialize(this, staticOnReceivedElement);
  }
  
  /**
   * This is called when an entire binary XML element is received.  You must extend this class to override this method.
   * @param element pointer to the binary XML element.  This buffer is only valid during this call.  If you need the data
   * later, you must copy.
   * @param elementLength length of element
   */
  virtual void 
  onReceivedElement(const uint8_t *element, size_t elementLength) = 0;
  
private:
  /**
   * Call the virtual method onReceivedElement. This is used to initialize the base ndn_ElementListener struct.
   * @param self
   * @param element
   * @param elementLength
   */
  static void 
  staticOnReceivedElement(struct ndn_ElementListener *self, uint8_t *element, size_t elementLength);
};

}

#endif