Gabriele Cosmo
88 lines
3.9 KiB
C++
88 lines
3.9 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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// RecorderBase.hh
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// 1-Sep-1999 Bill Seligman
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// This is an abstract base class to be used with Geant 4.0.1 (and
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// possibly higher, if the User classes don't change).
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// The concept of a Recorder object is that it records the activities of
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// Geant in a manner that is useful to a physicist. Perhaps this record
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// takes the form of histograms, or ntuples, or entries in an Objectivity
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// database. This class does not care HOW the information is recorded; it
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// abstracts the behavior of a generalized recorder of Geant variables.
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// No object should be instantiated from the Recorder class (in fact, any such
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// object won't do anything). The user must define a new class (say, a class
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// that creates histograms) and overload the methods of this class.
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// Why do this? First of all, it keeps all record-keeping in a single class:
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// the class that inherits Recorder. The original Geant documentation suggests
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// that recording activities should be split among many different classes
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// (initialization in G4UserRunAction, recording in G4UserSteppingAction, etc.).
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// If you use a Recorder class, than all the record-keeping details are kept in
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// a single class instead of being spread out among many different classes.
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// Secondly, by using an abstract Recorder class, you hide the implementation
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// details from the rest of Geant. If you change a couple of histograms, only
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// the Recorder-derived class and main() re-compile. No other class knows or
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// cares what or how you record.
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// The only time this class (i.e., this header file) changes is if new
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// user action classes are added to Geant.
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#ifndef RECORDER_BASE_H_
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#define RECORDER_BASE_H_
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// The following objects are the arguments to the methods
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// invoked in the user action classes. In other words, they
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// contain the variables that we are normally able to record
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// in Geant.
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#include "G4Run.hh"
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#include "G4Event.hh"
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#include "G4Track.hh"
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#include "G4Step.hh"
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class RecorderBase {
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public:
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virtual ~RecorderBase() {};
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// The following a list of methods that correspond to the available
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// user action classes in Geant 4.0.1. In this base class, the
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// methods are defined to do nothing.
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virtual void RecordBeginOfRun(const G4Run*) = 0;
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virtual void RecordEndOfRun(const G4Run*) = 0;
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virtual void RecordBeginOfEvent(const G4Event*) {};
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virtual void RecordEndOfEvent(const G4Event*) {};
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virtual void RecordTrack(const G4Track*) {};
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virtual void RecordStep(const G4Step*) {};
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};
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#endif
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