IndexedObject.hpp

/* Copyright (C) 2019-2021 GSI, MEPhI
   SPDX-License-Identifier: GPL-3.0-only
   Authors: Eugeny Kashirin, Ilya Selyuzhenkov */
#ifndef ANALYSISTREE_INDEXEDOBJECT_H
#define ANALYSISTREE_INDEXEDOBJECT_H
 
#include "Constants.hpp"
#include <TObject.h>
 
namespace AnalysisTree {
 
class IndexedObject;

class IndexAccessor {
 
 public:
  static void InitIndexedObject(IndexedObject* indexedObject, size_t newID);
};

class IndexedObject {
 public:
  IndexedObject() = default;//, id_(-1)  {}

  explicit IndexedObject(size_t id) : id_(id) {}

  IndexedObject(const IndexedObject& indexedObject) = default;
  IndexedObject(IndexedObject&& indexedObject) = default;
  IndexedObject& operator=(IndexedObject&&) = default;
  IndexedObject& operator=(const IndexedObject& indexedObject) = default;
  virtual ~IndexedObject() = default;
 
  ANALYSISTREE_ATTR_NODISCARD inline size_t GetId() const {
    return id_;
  }
 
  friend bool operator==(const IndexedObject& that, const IndexedObject& other) {
    if (&that == &other) {
      return true;
    }
 
    return that.id_ == other.id_;
  }
 
  friend bool operator!=(const IndexedObject& that, const IndexedObject& other) {
    return !(that == other);
  }
 
 private:
  friend class IndexAccessor;
 
  size_t id_{0};
 
  ClassDef(IndexedObject, 2)
};
 
}// namespace AnalysisTree
 
#endif//ANALYSISTREE_INDEXEDOBJECT_H