Mergeable.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 <TObject.h>
 
class TCollection;
class TDirectory;
 
namespace Belle2 {
  class Mergeable : public TObject {
  public:
    Mergeable() { }
    virtual ~Mergeable() { }
 
    virtual void merge(const Mergeable* other) = 0;
 
    virtual void clear() = 0;
 
    virtual void removeSideEffects() {}
 
    virtual Long64_t Merge(TCollection* hlist);
    virtual void Reset() {clear();}
    virtual void SetDirectory(TDirectory*) {}
  private:
    ClassDef(Mergeable, 0); 
  };
}