ThinningHandle.h

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// This file's extension implies that it's C, but it's really -*- C++ -*-.
/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
#ifndef STOREGATE_THINNINGHANDLE_H
#define STOREGATE_THINNINGHANDLE_H
 
 
#include "StoreGate/ThinningHandleKey.h"
#include "StoreGate/ThinningHandleBase.h"
#include "StoreGate/ReadHandle.h"
#include "GaudiKernel/ThreadLocalContext.h"
 
 
namespace SG {
 
 
template <class T>
class ThinningHandle
  : public ReadHandle<T>, public ThinningHandleBase
{
public:
  using Op = ThinningDecision::Op;
 
 
  explicit ThinningHandle (const ThinningHandleKey<T>& key)
    : ThinningHandle (key, Gaudi::Hive::currentContext())
  {
  }
 
 
  explicit ThinningHandle (const ThinningHandleKey<T>& key,
                           const EventContext& ctx)
    : ReadHandle<T> (key, ctx),
      ThinningHandleBase (key.decisionHandleKey(), key.key(), ctx)
  {
  }
 
  // Disallow initialization from a temporary Key object.
  explicit ThinningHandle (SG::ThinningHandleKey<T>&& key) = delete; // Not allowed from a temporary.
  explicit ThinningHandle (SG::ThinningHandleKey<T>&& key, 
                           const EventContext& ctx) = delete; // Not allowed from a temporary.
};
 
 
template <class T>
ThinningHandle<T> makeHandle (const ThinningHandleKey<T>& key)
{
  return ThinningHandle<T> (key);
}
 
 
template <class T>
ThinningHandle<T> makeHandle (const ThinningHandleKey<T>& key,
                              const EventContext& ctx)
{
  return ThinningHandle<T> (key, ctx);
}
 
 
} // namespace SG
 
 
#endif // not STOREGATE_THINNINGHANDLE_H