Example: ...


1) Example compiles, runs (?)

   OK, but tested without AIDA.

2) External software documentation (if present)

   AIDA is used for histogramming, a reference to aida.freehep.org is given,
    but this site seems in-active, recent news is 2005 and before.  

3) Classification of classes
   
   List classes specific to demonstrated features:
   
     The README says:
       This example demonstrates a usage of G4PhysListFactory to build 
       Physics List and G4HadronicProcessStore to access cross sections.

     There is _no_ further help which files to look at for this demonstration. 
     - The use of the physics lists factory is in the main program hadr00.cc, with few 
       comments.     
     - The access to cross sections via G4HadronicProcessStore is in 
       src/HistoManager.cc, HistoManager::EndOfRun(). There is a lack of
       comments explaining what is done, and why its done this way. 

     In summary, demonstrated features are in hadr00.cc and src/HistoManager.cc, but lack 
     explanation.
    
    
   List of classes which can be replaced with common ones:
   
     = DetectorConstruction / DetectorMessenger
        The geomtry of the example is a simple cylinder in the World volume. The
	messenger allows to change dimensions materials via UI commands /testhadr/...
	
	The messenger also to set parameters for the cross section to be printed or
	plotted, i.e. for the HistoManager: particle, number of bins, energy and momentum
	range, particle, element.
     
    The geometry could be generic, and setting the parameters for cross section
         printing could be moved to another (new) messenger class specific to this example.
     
     = EventAction / EventActionMessenger
        Can be replaced by generic class; this implementation allows to "debug" a
	specific event, saving the initial random number status for this event, and
	setting "/tracking/verbose 2".
	
	 
        The messenger extends the example specific commands by commands to set the events to debug (
	see EventAction, and an option wich kind of tracks to draw ( charged/neutral/all)
	
       Both classes could be generic.
      
       
     = Histo / HistoManager
     
        Histo manages histrograms via methods book(), fill(), save(), etc.... 
     
        HistoManager creates and fills histograms with cross section data 
     
     = HistoMessenger
        
	The messenger adds more examples specific commands, /testhadr/.., 
	
	Some commands seem to overlap DetectorMessenger, e.g. Number of bins  
	
     = PrimaryGeneratorAction
     	Using G4ParticleGun, no option to change particle, energy,...
	
     = RunAction
	Message HistoManager for begin/end of run.
   
   
4) Messenger classes
   List commands defined in this example:
   Three classes define commands: 
     DetectorMessenger:
        /testhadr/TargetMat
	/testhadr/WorldMat
	/testhadr/TargetRadius
	/testhadr/TargetLength
	/testhadr/nBinsE
	/testhadr/nBinsP
	/testhadr/update
	/testhadr/particle
	/testhadr/targetElm
	/testhadr/minEnergy
	/testhadr/maxEnergy
	/testhadr/minMomentum
	/testhadr/maxMomentum
	/testhadr/verbose
    EventActionMessenger:
	/testhadr/PrintModulo
	/testhadr/DebugEvent
     HistoMessenger:
	/testhadr/histo/fileName
	/testhadr/histo/fileType

   
   List commands which do not work as expected:
   a) not at all
     None 
   
   
   b) in some G4 phase(s)
      None
 
   
5) Code review:
   Report on obsolete code (if present):
   
   
   Report on inefficient code (if present):
   
   Your recommendations to example owner:
   
   ...
   
6) Documentation review:
   Your recommendations to example owner:
   
   
   
7) Comment on the adequacy in its physics domain
   (skip this item if you are not an expert in physics demonstrated 
   in the example):
   
   The example is very useful in that it allows to extract hadronic cross
   sections as used by a given physics list, and provide plots for this.    
   
8) "Users questions to be addressed in examples"   
   List questions which can be naturally addressed in this example:
   
   Hadronic cross sections in given physics list.