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 //==========================================================================
 //  AIDA Detector description implementation 
 //--------------------------------------------------------------------------
 // Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
 // All rights reserved.
 //
 // For the licensing terms see $DD4hepINSTALL/LICENSE.
 // For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
 //
 // Author     : M.Frank
 //
 //==========================================================================
 
 #ifndef DDG4_GEANT4PHYSICSLIST_H
 #define DDG4_GEANT4PHYSICSLIST_H
 
 // Framework include files
 #include <DDG4/Geant4Action.h>
 
 // C/C++ include files
 #include <map>
 #include <vector>
 
 // Forward declarations
 class G4VPhysicsConstructor;
 class G4VModularPhysicsList;
 class G4VUserPhysicsList;
 
 /// Namespace for the AIDA detector description toolkit
 namespace dd4hep {
 
   /// Namespace for the Geant4 based simulation part of the AIDA detector description toolkit
   namespace sim {
 
     /// Concrete basic implementation of a Geant4 physics list action
     /**
      *  \author  M.Frank
      *  \version 1.0
      *  \ingroup DD4HEP_SIMULATION
      */
     class Geant4PhysicsList: public Geant4Action {
     public:
 
       /// Structure describing a G4 process
       /**
        * Image of a physics constructor holding all stub information to attach
        * the concrete process contributing to the user physics list.
        *
        *  \author  M.Frank
        *  \version 1.0
        *  \ingroup DD4HEP_SIMULATION
        */
       class Process {
       public:
         std::string name;
         int ordAtRestDoIt=-1, ordAlongSteptDoIt=-1, ordPostStepDoIt=-1;
         /// Default constructor
         Process();
         /// Copy constructor
         Process(const Process& p);
         /// Assignment operator
         Process& operator=(const Process& p);
       };
       typedef std::vector<Process> ParticleProcesses;
       typedef std::map<std::string, ParticleProcesses> PhysicsProcesses;
 
       /// Structure describing a G4 particle constructor
       /**
        *  \author  M.Frank
        *  \version 1.0
        *  \ingroup DD4HEP_SIMULATION
        */
       class ParticleConstructor : public std::string {
       public:
         /// Default constructor
         ParticleConstructor() = default;
         /// Default constructor
         ParticleConstructor(const ParticleConstructor& copy) = default;
         /// Initalizing constructor
         ParticleConstructor(const std::string& s) : std::string(s) { }
         /// Assignment operator
         ParticleConstructor& operator=(const ParticleConstructor& c) = default;
       };
       typedef std::vector<ParticleConstructor> ParticleConstructors;
 
       /// Structure describing a G4 physics constructor
       /**
        *  \author  M.Frank
        *  \version 1.0
        *  \ingroup DD4HEP_SIMULATION
        */
       class PhysicsConstructor: public std::string {
       public:
         /// Pointer to physics constructor object
         G4VPhysicsConstructor* pointer      { nullptr };
         /// Pointer to the physics list the constructor belongs
         G4VModularPhysicsList* physics_list { nullptr };
       public:
         /// Default constructor
         PhysicsConstructor() = default;
         /// Copy constructor
         PhysicsConstructor(const PhysicsConstructor& c) = default;
         /// Initalizing constructor
         PhysicsConstructor(const std::string& s) : std::string(s), pointer(0)  {}
         /// Assignment operator
         PhysicsConstructor& operator=(const PhysicsConstructor& c) = default;
       };
       typedef std::vector<PhysicsConstructor> PhysicsConstructors;
 
       PhysicsProcesses     m_processes;
       PhysicsProcesses     m_discreteProcesses;
       PhysicsConstructors  m_physics;
       ParticleConstructors m_particles;
       ParticleConstructors m_particlegroups;
 
     public:
       /// Standard constructor with initailization parameters
       Geant4PhysicsList(Geant4Context* context, const std::string& nam);
       /// Default destructor
       virtual ~Geant4PhysicsList();
 
       /// Dump content to stdout
       void dump();
 
       /// Install command control messenger if wanted
       virtual void installCommandMessenger()  override;
       /// Access all physics processes
       PhysicsProcesses& processes() {
         return m_processes;
       }
       /// Access all physics processes
       const PhysicsProcesses& processes() const {
         return m_processes;
       }
       /// Access processes for one particle type
       ParticleProcesses& processes(const std::string& part_name);
       /// Access processes for one particle type (CONST)
       const ParticleProcesses& processes(const std::string& part_name) const;
 
       /// Access all physics discrete processes
       PhysicsProcesses& discreteProcesses() {
         return m_discreteProcesses;
       }
       /// Access all physics discrete processes
       const PhysicsProcesses& discreteProcesses() const {
         return m_discreteProcesses;
       }
       /// Access discrete processes for one particle type
       ParticleProcesses& discreteProcesses(const std::string& part_name);
       /// Access discrete processes for one particle type (CONST)
       const ParticleProcesses& discreteProcesses(const std::string& part_name) const;
 
       /// Access physics constructor by name
       PhysicsConstructor physics(const std::string& name)  const;
       
       /// Access all physics particles
       ParticleConstructors& particles() {
         return m_particles;
       }
       /// Access all physics particles
       const ParticleConstructors& particles() const {
         return m_particles;
       }
       /// Access all physics particlegroups
       ParticleConstructors& particlegroups() {
         return m_particlegroups;
       }
       /// Access all physics particlegroups
       const ParticleConstructors& particlegroups() const {
         return m_particlegroups;
       }
       /// Access all physics constructors
       PhysicsConstructors& physics() {
         return m_physics;
       }
       /// Access all physics constructors
       const PhysicsConstructors& physics() const {
         return m_physics;
       }
 
       /// Add physics particle constructor by name
       void addParticleConstructor(const std::string& part_name);
       /// Add physics particle group constructor by name (Leptons, Bosons, Mesons, etc.)
       void addParticleGroup(const std::string& part_name);
       /// Add particle process by name with arguments
       void addParticleProcess(const std::string& part_name, const std::string& proc_name,
                               int ordAtRestDoIt,int ordAlongSteptDoIt,int ordPostStepDoIt);
       /// Add discrete particle process by name with arguments
       void addDiscreteParticleProcess(const std::string& part_name, const std::string& proc_name);
       /// Add PhysicsConstructor by name
       /** This constructor is used for intrinsic Geant4 defined physics constructors.
        *  Such physics constructors are only created by the factory and attached
        *  to the physics list object.
        */
       void addPhysicsConstructor(const std::string& physics_name);
       /// Add PhysicsConstructor as Geant4Action object
       /** The action object must be a sub-class of type G4VPhysicsConstructor.
        *  -- The Geant4Action object to supports properties.
        *  -- Specific user actions may be implemented in the 
        *     base class calls to 'ConstructParticle' or 'ConstructProcess'.
        *     Both calls are invoked by the framework when the physics list
        *     is configured for the use in the run-manager.
        */
       void adoptPhysicsConstructor(Geant4Action* action);
       /// Callback to add a physics type to the physics list
       G4VPhysicsConstructor* addPhysicsConstructorType(const std::string& physics_name);
 
       /// constructPhysics callback
       virtual void constructPhysics(G4VModularPhysicsList* physics);
       /// Callback to construct particles
       virtual void constructParticles(G4VUserPhysicsList* physics);
       /// Callback to construct processes (uses the G4 particle table)
       virtual void constructProcesses(G4VUserPhysicsList* physics);
       /// Enable physics list: actions necessary to be propagated to Geant4.
       virtual void enable(G4VUserPhysicsList* physics);
     };
 
     /// The implementation of the single Geant4 physics list action sequence
     /**
      * Concrete implementation of the Geant4 physics list sequence.
      * A list to setup the physics content in a modular form
      *
      *  \author  M.Frank
      *  \version 1.0
      *  \ingroup DD4HEP_SIMULATION
      */
     class Geant4PhysicsListActionSequence: public Geant4Action {
     public:
 
     protected:
       /// Callback sequence for G4 physics constructors
       CallbackSequence m_physics          { };
       /// Callback sequence for G4 process constructors
       CallbackSequence m_process          { };
       /// Callback sequence for G4 particle constructors
       CallbackSequence m_particle         { };
       /// The list of action objects to be called
       Actors<Geant4PhysicsList> m_actors  { };
 
       /// Callback to construct particle decays
       virtual void constructDecays(G4VUserPhysicsList* physics);
     public:
       /// Property: Flag if particle transportation is to be added
       bool m_transportation         { false };
       /// Property: Flag if particle decays are to be added
       bool m_decays                 { false };
       /// Property: verbosity level for the physics list
       int m_verbosity               {     1 };
       /// Property: Verbosity level for G4VUserPhysicsList instance (See G4VUserPhysicsList.hh for details)
       int m_physics_verbosity       {    -1 };
       /// Property: global range cut for secondary productions
       double m_rangecut;
       /// Property: Store name of basic predefined Geant4 physics list
       std::string m_extends;
 
     public:
       /// Standard constructor
       Geant4PhysicsListActionSequence(Geant4Context* context, const std::string& nam);
       /// Default destructor
       virtual ~Geant4PhysicsListActionSequence();
       /// Dump content to stdout
       void dump();
       /// Install command control messenger if wanted
       virtual void installCommandMessenger()  override;
       /// Update transportation flag
       void setTransportation(bool value) {
         m_transportation = value;
       }
       /// Access the transportation flag
       bool transportation() const {
         return m_transportation;
       }
       /// Register physics construction callback
       template <typename Q, typename T>
       void constructPhysics(Q* p, void (T::*f)(G4VModularPhysicsList*)) {
         m_physics.add(p, f);
       }
       /// Register process construction callback
       template <typename Q, typename T>
       void constructProcess(Q* p, void (T::*f)(G4VUserPhysicsList*)) {
         m_process.add(p, f);
       }
       /// Register particle construction callback
       template <typename Q, typename T>
       void constructParticle(Q* p, void (T::*f)(G4VUserPhysicsList*)) {
         m_particle.add(p, f);
       }
       /// Add an actor responding to all callbacks. Sequence takes ownership.
       void adopt(Geant4PhysicsList* action);
 
       /// Execute sequence of G4 physics constructors
       virtual void constructProcesses(G4VUserPhysicsList* physics);
       /// Execute sequence of G4 particle constructors
       virtual void constructParticles(G4VUserPhysicsList* physics);
       /// Execute sequence of G4  physics constructors
       virtual void constructPhysics(G4VModularPhysicsList* physics);
       /// Enable physics list: actions necessary to be propagated to Geant4.
       virtual void enable(G4VUserPhysicsList* physics);
       /// Extend physics list from factory:
       G4VUserPhysicsList* extensionList();
     };
 
   }    // End namespace sim
 }      // End namespace dd4hep
 
 #endif // DDG4_GEANT4PHYSICSLIST_H

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