SGObjectWithVersion.h

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/* -*- C++ -*- */
 
/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/

#ifndef STOREGATE_SGOBJECTWITHVERSION_H
#define STOREGATE_SGOBJECTWITHVERSION_H 1
 
#include "SGTools/SGVersionedKey.h"
#include "StoreGate/ReadHandle.h"
namespace SG {
  template <typename T>
  class ObjectWithVersion {
  public:
    ObjectWithVersion(): versionedKey(), dataObject() {}
    ObjectWithVersion(const ObjectWithVersion& rhs):
      versionedKey(rhs.versionedKey), dataObject(rhs.dataObject) {}
    ObjectWithVersion(const VersionedKey& vk, const SG::ReadHandle<T>& dh):
      versionedKey(vk), dataObject(dh) {}
    ObjectWithVersion(const VersionedKey& vk, SG::DataProxy* proxy):
      versionedKey(vk), dataObject(proxy) {}
    ObjectWithVersion& operator= (const ObjectWithVersion& rhs)
    {
      if (this != &rhs) {
        versionedKey = rhs.versionedKey;
        dataObject = rhs.dataObject;
      }
      return *this;
    }
    SG::VersionedKey versionedKey;
    SG::ReadHandle<T> dataObject;
  };
}
template <typename T>
bool operator < (const SG::ObjectWithVersion<T>& lhs,
                 const SG::ObjectWithVersion<T>& rhs) {
  return (lhs.versionedKey < rhs.versionedKey);
}
 
#endif