DataHandleBase.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
// DataHandleBase.h 
// Header file for class DataHandleBase
// Author: S.Binet<binet@cern.ch>
#ifndef SGTOOLS_DATAHANDLEBASE_H
#define SGTOOLS_DATAHANDLEBASE_H 1
 
// STL includes
#include <string>
 
// fwk includes
#include "AthenaKernel/IProxyDict.h"
#include "AthenaKernel/IResetable.h"
 
// SGTools includes
#include "SGTools/DataProxy.h"
#include "SGTools/ProxyMap.h"
 
#include "CxxUtils/checker_macros.h"
 
// Forward declaration
 

class ATLAS_NOT_THREAD_SAFE DataHandleBase : public IResetable
{ 

  // Public typedefs: 
public: 
  typedef std::string ID_type;

  // Public methods: 
public: 

  DataHandleBase();

  DataHandleBase( const DataHandleBase& rhs );

  DataHandleBase& operator=( const DataHandleBase& rhs ); 

 
  DataHandleBase(SG::DataProxy* proxy); 
  DataHandleBase(const SG::ConstProxyIterator& itr1,
                 const SG::ConstProxyIterator& itr2);

  virtual ~DataHandleBase(); 

  // Const methods: 


  bool isConst() const;
  bool isInitialized() const;    
  virtual bool isSet() const override { return isInitialized(); }

  virtual const std::string& key() const override;
 
  StatusCode setState(SG::DataProxy* proxy) const;
  StatusCode setState(IProxyDict* store, const ID_type& name) const;
 
  // Note: itr1 may be modified!
  StatusCode setState(SG::ConstProxyIterator& itr1,
                      const SG::ConstProxyIterator& itr2) const;

  virtual CLID clid() const =0;

  ID_type ID() const { return isInitialized() ? m_proxy->name() : "NONE"; }

  // Non-const methods: 
 
  StatusCode setState(SG::DataProxy* proxy);
  StatusCode setState(IProxyDict* store, const ID_type& name);

  // Protected data: 
protected: 

  mutable SG::ConstProxyIterator m_itr;

  mutable SG::ConstProxyIterator m_itrEnd;

  mutable SG::DataProxy* m_proxy;

  mutable bool m_useItr;
 
}; 

// Inline methods: 
//std::ostream& operator<<( std::ostream& out, const DataHandleBase& o );
 
 
 
#endif //> !SGTOOLS_DATAHANDLEBASE_H