DataHandleHolderVisitor.h

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* (c) Copyright 1998-2025 CERN for the benefit of the LHCb and ATLAS collaborations *
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* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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#pragma once
 
#include <GaudiKernel/DataObjID.h>
#include <GaudiKernel/IDataHandleHolder.h>
#include <map>
#include <set>
#include <string>
#include <vector>
 
class DHHVisitor : public IDataHandleVisitor {
public:
  using Owners = std::vector<const IDataHandleHolder*>;
 
  DHHVisitor( DataObjIDColl& ido, DataObjIDColl& odo );
 
  const DataObjIDColl& ignoredInpKeys() const { return m_ign_i; }
  const DataObjIDColl& ignoredOutKeys() const { return m_ign_o; }
 
  void visit( const IDataHandleHolder* visitee ) override;
 
  const std::map<DataObjID, std::set<const IDataHandleHolder*>>& owners() const { return m_owners; }
 
  std::vector<const IDataHandleHolder*> owners_of( const DataObjID& id ) const;
 
  std::vector<std::string> owners_names_of( const DataObjID& id, bool with_main = false ) const;
 
  bool empty() const;
 
private:
  DataObjIDColl &m_ido, &m_odo;
  DataObjIDColl  m_ign_i, m_ign_o;
 
  std::map<DataObjID, std::set<const IDataHandleHolder*>> m_owners;
 
  std::string m_initialName;
 
  MsgStream& report( MsgStream& stream ) const;
 
  friend MsgStream& operator<<( MsgStream& stream, const DHHVisitor& visitor ) { return visitor.report( stream ); }
};