PDGLibrary.h

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//____________________________________________________________________________
/*!

\class    genie::PDGLibrary

\brief    Singleton class to load & serve a TDatabasePDG.

\author   Costas Andreopoulos <constantinos.andreopoulos \at cern.ch>
          University of Liverpool & STFC Rutherford Appleton Laboratory

          Changes required to implement the GENIE Boosted Dark Matter module
          were installed by Josh Berger (Univ. of Wisconsin)

          Changes required to implement the GENIE Dark Neutrino module
          were installed by Iker de Icaza (Univ. of Sussex)

\created  May 06, 2004

\cpright  Copyright (c) 2003-2020, The GENIE Collaboration
          For the full text of the license visit http://copyright.genie-mc.org
*/
//____________________________________________________________________________

#ifndef _PDG_LIBRARY_H_
#define _PDG_LIBRARY_H_

#include <TDatabasePDG.h>
#include <TParticlePDG.h>

namespace genie {

class PDGLibrary
{
public:

  static PDGLibrary * Instance(void);

  TDatabasePDG * DBase (void);
  TParticlePDG * Find  (int pdgc, bool must_exist = true );
  void           ReloadDBase (void);

  // Add dark matter and mediator with parameters from Boosted Dark Matter app configuration
  // Ideally, this code should be in the Dark Matter app, not here.
  // But presently there is no way to edit the PDGLibrary after it has been created.
  void AddDarkMatter  (double mass, double med_ratio);
  // Similarly for the NHL app
  void AddNHL  (double mass);

private:

  PDGLibrary();
  PDGLibrary(const PDGLibrary & config_pool);
  virtual ~PDGLibrary();

  bool LoadDBase(void);
  bool AddDarkSector ();

  static PDGLibrary * fInstance;
  TDatabasePDG      * fDatabasePDG;

  struct Cleaner {
      void DummyMethodAndSilentCompiler() { }
      ~Cleaner() {
         if (PDGLibrary::fInstance !=0) {
            delete PDGLibrary::fInstance;
            PDGLibrary::fInstance = 0;
         }
      }
  };
  friend struct Cleaner;
};

}      // genie namespace

#endif // _PDG_LIBRARY_H_