--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/applications/application.cc	Fri May 04 15:04:07 2007 +0200
@@ -0,0 +1,195 @@
+/* -*-  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 {
+
+// Application Methods
+
+// \brief Application Constructor
+Application::Application(Node * n) 
+    : m_node (n),
+      m_startVar(0), m_stopVar(0),
+      m_start(false), m_stop(false)
+{
+  m_node->Ref ();
+}
+
+Application::Application(const Application& o)
+    : m_node(0), m_startVar(0), m_stopVar(0),
+      m_start(false), m_stop(false)
+{ // Copy constructor
+  m_node = o.m_node;
+  m_node->Ref ();
+  // Copy the start and stop random variables if they exist
+  if (o.m_startVar) m_startVar = o.m_startVar->Copy();
+  if (o.m_stopVar)  m_stopVar  = o.m_stopVar->Copy();
+  if (o.m_start)    ScheduleStart();
+  if (o.m_stop)     ScheduleStop();
+}
+
+  
+// \brief Application Destructor
+Application::~Application()
+{}
+
+void
+Application::DoDispose (void)
+{
+  if (m_node != 0)
+    {
+      m_node->Unref ();
+      m_node = 0;
+    }
+  if (m_start) 
+    {
+      Simulator::Cancel(m_startEvent);
+      m_start = false;
+    }
+  if (m_stop) 
+    {
+      Simulator::Cancel(m_stopEvent);
+      m_stop = false;
+    }
+  delete m_startVar;
+  m_startVar = 0;
+  delete m_stopVar;
+  m_stopVar = 0;
+}
+  
+Application& Application::operator=(const Application& rhs)
+{
+  if (this == &rhs) return *this; // Self assignment
+  m_node->Unref ();
+  m_node = 0;
+  m_node = rhs.m_node;
+  m_node->Ref ();
+
+  delete m_startVar;
+  m_startVar = 0;
+  if (rhs.m_startVar) m_startVar = rhs.m_startVar->Copy();
+  
+  delete m_stopVar;
+  m_stopVar = 0;
+  if (rhs.m_stopVar) m_stopVar = rhs.m_stopVar->Copy();
+  
+  m_start = false;
+  if (rhs.m_start) ScheduleStart();
+  if (rhs.m_stop)  ScheduleStop();
+  return *this;
+}
+  
+   
+// \brief Specify application start time
+// The virtual method STartApp will be called at the time
+// specified by startTime.
+// \param Time to start application (absolute time, from start of simulation)
+void Application::Start(const Time& startTime)
+{
+  delete m_startVar;
+  m_startVar = new ConstantVariable(startTime.GetSeconds());
+  ScheduleStart();
+}
+
+void Application::Start(const RandomVariable& startVar)
+{ // Start at random time
+  delete m_startVar;
+  m_startVar = startVar.Copy();
+  ScheduleStart();
+}
+
+   
+// \brief Specify application stop time
+// The virtual method StopApp will be called at the time
+// specified by stopTime.
+// \param Time to stop application (absolute time, from start of simulation)
+void Application::Stop(const Time& stopTime)
+{
+  delete m_stopVar;
+  m_stopVar = new ConstantVariable(stopTime.GetSeconds());
+  ScheduleStop();
+}
+
+void Application::Stop(const RandomVariable& stopVar)
+{ // Stop at random time
+  delete m_stopVar;
+  m_stopVar = stopVar.Copy();
+  ScheduleStop();
+}
+
+// \brief Assign this application to a given node
+// Called by the application manager capability when adding
+// an application to a node.
+void Application::SetNode(Node * n)
+{
+  if (m_node != 0)
+    {
+      m_node->Unref ();
+    }
+  m_node = n;
+  m_node->Ref ();
+}
+  
+Node* Application::PeekNode() 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()
+{
+  m_startEvent = Simulator::Schedule(Seconds(m_startVar->GetValue()) -
+                                     Simulator::Now(),
+                                     &Application::StartApplication, this);
+  m_start = true;
+}
+
+void Application::ScheduleStop()
+{
+  m_stopEvent = Simulator::Schedule(Seconds(m_stopVar->GetValue()) -
+                                     Simulator::Now(),
+                                     &Application::StopApplication, this);
+  m_stop = true;
+}
+
+} //namespace ns3
+      
+