/*
 * Copyright (c) 2009 University of Washington
 *
 * 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
 */

#ifndef CHANNEL_LIST_H
#define CHANNEL_LIST_H

#include "ns3/ptr.h"

#include <vector>

namespace ns3
{

class Channel;
class CallbackBase;

/**
 * \ingroup network
 *
 * \brief the list of simulation channels.
 *
 * Every Channel created is automatically added to this list.
 */
class ChannelList
{
  public:
    /// Channel container iterator
    typedef std::vector<Ptr<Channel>>::const_iterator Iterator;

    /**
     * \param channel channel to add
     * \returns index of channel in list.
     *
     * This method is called automatically from Channel::Channel so
     * the user has little reason to call it himself.
     */
    static uint32_t Add(Ptr<Channel> channel);
    /**
     * \returns a C++ iterator located at the beginning of this
     *          list.
     */
    static Iterator Begin();
    /**
     * \returns a C++ iterator located at the end of this
     *          list.
     */
    static Iterator End();
    /**
     * \param n index of requested channel.
     * \returns the Channel associated to index n.
     */
    static Ptr<Channel> GetChannel(uint32_t n);
    /**
     * \returns the number of channels currently in the list.
     */
    static uint32_t GetNChannels();
};

} // namespace ns3

#endif /* CHANNEL_LIST_H */
