/cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/xAODRootAccessInterfaces/xAODRootAccessInterfaces/TVirtualEvent.h

// Dear emacs, this is -*- c++ -*-
// $Id: TVirtualEvent.h 682043 2015-07-10 09:21:12Z krasznaa $
#ifndef XAODROOTACCESSINTERFACES_TVIRTUALEVENT_H
#define XAODROOTACCESSINTERFACES_TVIRTUALEVENT_H

// System include(s):
extern "C" {
#   include <stdint.h>
}

// Forward declaration(s):
namespace std {
   class type_info;
}

namespace xAOD {

   class TVirtualEvent {

   public:
      virtual ~TVirtualEvent() {}

      static const uint32_t DEFAULT_KEY = 0xffffffff;
      static const uint32_t KEY_MASK = 0x3fffffff;

      template< typename T >
      bool retrieve( const T*& obj, uint32_t key = DEFAULT_KEY,
                     bool silent = false );
      template< typename T >
      bool retrieve( const T*& obj, const std::string& key,
                     bool silent = false );

      virtual uint32_t getHash( const std::string& key ) const = 0;
      virtual uint32_t getKey( const void* obj ) const = 0;
      virtual const std::string& getName( const void* obj ) const = 0;
      virtual const std::string& getName( uint32_t hash ) const = 0;

   protected:
      virtual void* getOutputObject( uint32_t key,
                                     const std::type_info& ti ) = 0;
      virtual const void* getInputObject( uint32_t key,
                                          const std::type_info& ti,
                                          bool silent = false ) = 0;

   }; // class TVirtualEvent

} // namespace xAOD

// Include the template implementation:
#include "TVirtualEvent.icc"

#endif // XAODROOTACCESSINTERFACES_TVIRTUALEVENT_H

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