/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2006 Georgia Tech Research Corporation

 *

 * 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: George F. Riley<riley@ece.gatech.edu>

 */

// Implementation for ns3 Application base class.

// George F. Riley, Georgia Tech, Fall 2006

#include "application.h"

#include "ns3/node.h"

#include "ns3/nstime.h"

#include "ns3/random-variable.h"

#include "ns3/simulator.h"

using namespace std;

namespace ns3 {

NS_OBJECT_ENSURE_REGISTERED (Application);

// Application Methods

TypeId 

Application::GetTypeId (void)

{

  static TypeId tid = TypeId ("Application")

    .SetParent<Object> ()

    ;

  return tid;

}

// \brief Application Constructor

Application::Application()

{}

// \brief Application Destructor

Application::~Application()

{}

void

Application::DoDispose (void)

{

  m_node = 0;

  Simulator::Cancel(m_startEvent);

  Simulator::Cancel(m_stopEvent);

}  

void Application::Start(const Time& startTime)

{

  ScheduleStart (startTime);

}

void Application::Start(const RandomVariable& startVar)

{

  RandomVariable v = startVar;

  ScheduleStart (Seconds (v.GetValue ()));

}

void Application::Stop(const Time& stopTime)

{

  ScheduleStop (stopTime);

}

void Application::Stop(const RandomVariable& stopVar)

{

  RandomVariable v = stopVar;

  ScheduleStop (Seconds (v.GetValue ()));

}

Ptr<Node> Application::GetNode() const

{

  return m_node;

}

// Protected methods

// StartApp and StopApp will likely be overridden by application subclasses

void Application::StartApplication()

{ // Provide null functionality in case subclass is not interested

}

void Application::StopApplication()

{ // Provide null functionality in case subclass is not interested

}

// Private helpers

void Application::ScheduleStart (const Time &startTime)

{

  m_startEvent = Simulator::Schedule(startTime -

                                     Simulator::Now(),

                                     &Application::StartApplication, this);

}

void Application::ScheduleStop (const Time &stopTime)

{

  m_stopEvent = Simulator::Schedule(stopTime -

                                    Simulator::Now(),

                                    &Application::StopApplication, this);

}

} //namespace ns3