IDataStreamTool.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/IAlgTool.h>
#include <string>
 
class IEvtSelector;
class EventSelectorDataStream;
 
class GAUDI_API IDataStreamTool : virtual public IAlgTool {
public:
  DeclareInterfaceID( IDataStreamTool, 2, 0 );
 
  typedef std::vector<std::string> StreamSpecs;
  typedef long                     size_type;
 
  virtual StatusCode initializeStream( EventSelectorDataStream* ) = 0;
 
  virtual StatusCode finalizeStream( EventSelectorDataStream* ) = 0;
 
  virtual StatusCode getNextStream( const EventSelectorDataStream*&, size_type& ) = 0;
 
  virtual StatusCode getPreviousStream( const EventSelectorDataStream*&, size_type& ) = 0;
 
  virtual StatusCode addStream( const std::string& ) = 0;
 
  virtual StatusCode addStreams( const StreamSpecs& ) = 0;
 
  virtual StatusCode eraseStream( const std::string& ) = 0;
 
  virtual EventSelectorDataStream* getStream( size_type ) = 0;
 
  virtual EventSelectorDataStream* getStream( const std::string& ) = 0;
 
  virtual EventSelectorDataStream* lastStream() = 0;
 
  virtual size_type size() = 0;
 
  virtual StatusCode clear() = 0;
 
protected:
  virtual StatusCode createSelector( const std::string&, const std::string&, IEvtSelector*& ) = 0;
 
  virtual StatusCode createStream( const std::string&, const std::string&, EventSelectorDataStream*& ) = 0;
};