ReadMetaHandleKey.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef STOREGATE_READMETAHANDLEKEY_H
#define STOREGATE_READMETAHANDLEKEY_H
 
#include "StoreGate/MetaHandleKey.h"
#include <concepts>
#include <string>
 
namespace SG {
 
  template <class T> class ReadMetaHandle;
  
  template <class T> class ReadMetaHandleKey
    : public MetaHandleKey<T>
    {      
    public:
      friend class ReadMetaHandle<T>;
        
      explicit ReadMetaHandleKey (const std::string& key
             , const std::string& dbKey="")
    : MetaHandleKey<T>(key, dbKey, Gaudi::DataHandle::Reader)
    {}   
 
    template <std::derived_from<IProperty> OWNER>
    inline ReadMetaHandleKey( OWNER* owner
                  , std::string name
                  , const std::string& key={}
                  , std::string doc="") 
    : ReadMetaHandleKey<T>( key ) {
    auto p = owner->declareProperty(std::move(name), *this, std::move(doc));
    p->template setOwnerType<OWNER>();
      }
 
    inline ReadMetaHandleKey& operator= (const std::string& sgkey) {
      VarHandleKey::operator= (sgkey);
      return *this;
    }
 
    };
 
} // namespace SG
 
#endif // not STOREGATE_READMETAHANDLEKEY_H