DataHistory.h

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#ifndef GAUDIKERNEL_DATAHISTORY_H
#define GAUDIKERNEL_DATAHISTORY_H

// History for an event data object.

#include "GaudiKernel/HistoryObj.h"

#include "GaudiKernel/ClassID.h"
#include "GaudiKernel/StatusCode.h"
#include <iostream>
#include <string>
#include <vector>

class AlgorithmHistory;

class GAUDI_API DataHistory : public HistoryObj {

public:
  class DataHistoryOrder final {
  public:
    bool operator()( const DataHistory& lhs, const DataHistory& rhs ) const {
      return std::tie( lhs.m_dataClassID, lhs.m_dataKey, lhs.m_algHist ) <
             std::tie( rhs.m_dataClassID, rhs.m_dataKey, rhs.m_algHist );
    }
    bool operator()( const DataHistory* lhs, const DataHistory* rhs ) const { return ( *this )( *lhs, *rhs ); }
  };

  DataHistory( const CLID& id, std::string key, AlgorithmHistory* alg );

  const CLID&        clID() const override { return DataHistory::classID(); }
  static const CLID& classID();

  std::string dataKey() const { return m_dataKey; }
  const CLID& dataClassID() const { return m_dataClassID; }

  AlgorithmHistory* algorithmHistory() const { return m_algHist; }

  void dump( std::ostream&, const bool isXML = false, int indent = 0 ) const override;

private:
  CLID              m_dataClassID;
  std::string       m_dataKey;
  AlgorithmHistory* m_algHist;
  std::string       m_dummy = "none";
};

GAUDI_API std::ostream& operator<<( std::ostream& lhs, const DataHistory& rhs );

#endif