Import Geant4 5.0.0 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.                                    *
+// ********************************************************************
+//
+//
+// -------------------------------------------------------------------
+//      GEANT4 Class file
+//
+//
+//      File name:     G4CrossSectionPatch
+//
+//      Author:        Maria Grazia Pia (MariaGrazia.Pia@genova.infn.it)
+// 
+//      Creation date: 15 April 1999
+//
+//      Modifications: 
+//      
+// -------------------------------------------------------------------
+
+#ifndef G4CROSSSECTIONPATCH_HH
+#define G4CROSSSECTIONPATCH_HH
+
+#include "globals.hh"
+#include "G4CrossSectionVector.hh"
+#include "G4VCrossSectionSource.hh"
+
+class G4KineticTrack;
+
+class G4CrossSectionPatch : public G4VCrossSectionSource
+{
+
+public:
+
+  G4CrossSectionPatch();
+
+  virtual ~G4CrossSectionPatch();
+
+  G4bool operator==(const G4CrossSectionPatch& right) const;
+  G4bool operator!=(const G4CrossSectionPatch& right) const;
+
+  virtual G4double CrossSection(const G4KineticTrack& trk1, const G4KineticTrack& trk2) const;
+ 
+  virtual const G4CrossSectionVector* GetComponents() const = 0;
+
+  virtual G4bool IsValid(G4double e) const;
+
+
+protected:
+
+  // Transition between two cross section formulae in an energy range
+  G4double Transition(const G4KineticTrack& trk1, 
+		      const G4KineticTrack& trk2,
+		      const G4VCrossSectionSource* comp1, 
+		      const G4VCrossSectionSource* comp2) const;
+
+  G4double Transition(G4double ecm, 
+		      G4double sigma1, G4double sigma2, 
+		      G4double e1, G4double e2) const;
+
+private:  
+
+  G4CrossSectionPatch(const G4CrossSectionPatch& right);
+
+  G4CrossSectionPatch& operator=(const G4CrossSectionPatch& right);
+};
+  
+#endif