Import Geant4 6.0.0 source tree

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+//
+// ********************************************************************
+// * DISCLAIMER                                                       *
+// *                                                                  *
+// * The following disclaimer summarizes all the specific disclaimers *
+// * of contributors to this software. The specific disclaimers,which *
+// * govern, are listed with their locations in:                      *
+// *   http://cern.ch/geant4/license                                  *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.                                                             *
+// *                                                                  *
+// * This  code  implementation is the  intellectual property  of the *
+// * GEANT4 collaboration.                                            *
+// * By copying,  distributing  or modifying the Program (or any work *
+// * based  on  the Program)  you indicate  your  acceptance of  this *
+// * statement, and all its terms.                                    *
+// ********************************************************************
+//
+//
+// $Id: G4TransportationManager.cc,v 1.4 2003/12/05 17:08:27 gcosmo Exp $
+// GEANT4 tag $Name: geant4-06-00 $
+//
+//
+// G4TransportationManager 
+//
+// Author: J.Apostolakis (John.Apostolakis@cern.ch), 1997
+//
+// --------------------------------------------------------------------
+
+#include "G4TransportationManager.hh"
+
+#include "G4GeometryMessenger.hh"
+#include "G4PropagatorInField.hh"
+#include "G4FieldManager.hh"
+
+G4TransportationManager* G4TransportationManager::fTransportationManager=0;
+
+G4TransportationManager::G4TransportationManager() 
+{ 
+  if (!fTransportationManager)
+  {
+    fGeomMessenger=        new G4GeometryMessenger(this);
+    fNavigatorForTracking= new G4Navigator() ;
+    fFieldManager=         new G4FieldManager() ;
+    fPropagatorInField=    new G4PropagatorInField( fNavigatorForTracking,
+                                                    fFieldManager);
+  }
+  else
+  {
+    G4cerr << "Only ONE instance of G4TransportationManager is allowed!"
+           << G4endl;
+    G4Exception("G4TransportationManager::G4TransportationManager()",
+                "InvalidSetup", FatalException,
+                "Only ONE instance of G4TransportationManager is allowed!");
+  }
+} 
+
+G4TransportationManager::~G4TransportationManager()
+{
+  delete fGeomMessenger;
+  delete fNavigatorForTracking; 
+  delete fPropagatorInField;
+  delete fFieldManager; 
+}
+
+G4TransportationManager* G4TransportationManager::GetTransportationManager()
+{
+   static G4TransportationManager theInstance;
+   if (!fTransportationManager)
+     fTransportationManager = &theInstance;
+   
+   return fTransportationManager;
+}
+
+void G4TransportationManager::SetFieldManager(G4FieldManager* newFieldManager)
+{
+   fFieldManager = newFieldManager; 
+
+   // Message the PropagatorInField, 
+   //     which also maintains this information (to be reviewed)
+   if( fPropagatorInField )
+      fPropagatorInField -> SetDetectorFieldManager( newFieldManager );
+}