RefHistObject.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
#pragma once
 
#include <TH1.h>
 
namespace Belle2 {

  class RefHistObject {
  public:
    std::string m_orghist_name; 
    std::string m_refhist_name; 
    std::unique_ptr <TH1> m_refHist;
    std::unique_ptr <TH1> m_refCopy;
 
  public:

    RefHistObject(void) : m_orghist_name(""), m_refhist_name(""), m_refHist(nullptr), m_refCopy(nullptr) {};

    RefHistObject(RefHistObject&& other) noexcept
      : m_orghist_name(std::move(other.m_orghist_name)),
        m_refhist_name(std::move(other.m_refhist_name)),
        m_refHist(std::move(other.m_refHist)),
        m_refCopy(std::move(other.m_refCopy))
    {
      // Reset the moved-from object
      other.m_refHist = nullptr;
      other.m_refCopy = nullptr;
    }

    RefHistObject& operator=(RefHistObject&& other) noexcept
    {
      if (this != &other) {
        m_orghist_name = std::move(other.m_orghist_name);
        m_refhist_name = std::move(other.m_refhist_name);
        m_refHist = std::move(other.m_refHist);
        m_refCopy = std::move(other.m_refCopy);
 
        // Reset the moved-from object
        other.m_refHist = nullptr;
        other.m_refCopy = nullptr;
      }
      return *this;
    }
 
#if 0 // Unused, keep in case we need an explicit public accessor (e.g. testing). Code should use getReference below.
    TH1* getRefHist(void) { return m_refHist.get();};

    TH1* getRefCopy(void) { return m_refCopy.get();};
#endif

    void setRefHist(TH1* refHist)
    {
      m_refHist.reset(refHist);  // Assumes ownership of refHist
    }

    void setRefCopy(TH1* refCopy)
    {
      m_refCopy.reset(refCopy);  // Assumes ownership of refCopy
    }

    TH1* getReference(void);
 
  private:
    void makeReferenceCopy(void);
  };

}