IDataHandleHolder.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/DataHandle.h>
#include <GaudiKernel/DataObjID.h>
#include <GaudiKernel/IInterface.h>
#include <GaudiKernel/INamedInterface.h>
 
#include <set>
#include <vector>
 
class IDataHandleVisitor;
 
class GAUDI_API IDataHandleHolder : virtual public INamedInterface {
public:
  virtual std::vector<Gaudi::DataHandle*> inputHandles() const  = 0;
  virtual std::vector<Gaudi::DataHandle*> outputHandles() const = 0;
 
  virtual const DataObjIDColl& extraInputDeps() const  = 0;
  virtual const DataObjIDColl& extraOutputDeps() const = 0;
 
  virtual void acceptDHVisitor( IDataHandleVisitor* ) const = 0;
 
  virtual const DataObjIDColl& inputDataObjs() const  = 0;
  virtual const DataObjIDColl& outputDataObjs() const = 0;
 
  virtual void addDependency( const DataObjID&, const Gaudi::DataHandle::Mode& ) = 0;
 
  DeclareInterfaceID( IDataHandleHolder, 1, 0 );
 
  virtual void declare( Gaudi::DataHandle& )     = 0;
  virtual void renounce( Gaudi::DataHandle& )    = 0;
  virtual bool renounceInput( const DataObjID& ) = 0;
};
 
class IDataHandleVisitor {
public:
  virtual ~IDataHandleVisitor()                  = default;
  virtual void visit( const IDataHandleHolder* ) = 0;
};