UserActionFactory.h File Reference

A class for generating concrete UserAction derived classes based on the factory pattern. This code supplies a CPP macro which allows the classes to self-register and thus no modification of this class is needed in order to expand the list of classes it knows about. More...

#include <string>
#include <vector>
#include <map>
#include "nutools/G4Base/UserAction.h"

Go to the source code of this file.

Classes
class	g4b::UserActionFactory
struct	g4b::UserActionFactory::Cleaner

Namespaces
	g4b
	basic interface to Geant4 for ART-based software

Macros
#define	USERACTIONREG(_name)
#define	USERACTIONREG3(_ns, _name, _fqname)
#define	USERACTIONREG4(_nsa, _nsb, _name, _fqname)

Typedefs
typedef g4b::UserAction *(*	g4b::UserActionCtorFuncPtr_t) ()

Detailed Description

A class for generating concrete UserAction derived classes based on the factory pattern. This code supplies a CPP macro which allows the classes to self-register and thus no modification of this class is needed in order to expand the list of classes it knows about.

Implemented as a singleton holding a map between names and pointers-to-functions (that call a class default constructor). The functions pointers must return UserAction*.

Version

Author

Robert Hatcher <rhatcher fnal.gov> Fermi National Accelerator Laboratory

Definition in file UserActionFactory.h.

Macro Definition Documentation

#define USERACTIONREG

(

_name

)

Value:

g4b::UserAction* _name ## _ctor_function () { return new _name; } \
  static bool _name ## _creator_registered =                            \
    g4b::UserActionFactory::Instance().RegisterCreator(# _name, \
                                        & _name ## _ctor_function,        \
                                        & _name ## _creator_registered );

Definition at line 112 of file UserActionFactory.h.

#define USERACTIONREG3	(		_ns,
			_name,
			_fqname
	)

Value:

namespace _ns { \
  g4b::UserAction* _name ## _ctor_function () { return new _fqname; }   \
  static bool _name ## _creator_registered =                                \
    g4b::UserActionFactory::Instance().RegisterCreator(# _fqname, \
                                        & _fqname ## _ctor_function,          \
                                        & _fqname ## _creator_registered );}

Definition at line 119 of file UserActionFactory.h.

#define USERACTIONREG4	(		_nsa,
			_nsb,
			_name,
			_fqname
	)

Value:

namespace _nsa { \
 namespace _nsb { \
  g4b::UserAction* _name ## _ctor_function () { return new _fqname; }   \
  static bool _name ## _creator_registered =                                \
    g4b::UserActionFactory::Instance().RegisterCreator(# _fqname, \
                                        & _fqname ## _ctor_function,          \
                                        & _fqname ## _creator_registered );}}

Definition at line 127 of file UserActionFactory.h.