--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/contrib/stats/data-calculator.h	Fri Aug 29 13:22:09 2008 -0400
@@ -0,0 +1,70 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2008 Drexel University
+ *
+ * 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: Joe Kopena (tjkopena@cs.drexel.edu)
+ */
+
+#ifndef __DATA_CALCULATOR_H__
+#define __DATA_CALCULATOR_H__
+
+#include "ns3/object.h"
+#include "ns3/nstime.h"
+#include "ns3/simulator.h"
+
+namespace ns3 {
+
+  class DataOutputCallback;
+
+  //------------------------------------------------------------
+  //--------------------------------------------
+  class DataCalculator : public Object {
+  public:
+    DataCalculator();
+    virtual ~DataCalculator();
+
+    bool GetEnabled() const;
+    void Enable();
+    void Disable();
+
+    void SetKey(const std::string key);
+    const std::string GetKey() const;
+
+    virtual void Start(const Time& startTime);
+    virtual void Stop(const Time& stopTime);
+
+    virtual void Output(DataOutputCallback &callback) const = 0;
+
+  protected:
+    bool m_enabled;  // Descendant classes *must* check & respect m_enabled!
+
+    std::string m_key;
+
+    virtual void DoDispose(void);
+
+  private:
+    EventId m_startEvent;
+    EventId m_stopEvent;
+
+    // end class DataCalculator
+  };
+
+
+  // end namespace ns3
+};
+
+
+#endif // __DATA_CALCULATOR_H__