ServiceHandle.h

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/*
  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
*/

 
 
#ifndef ASGSERVICES_SERVICEHANDLE_H
#define ASGSERVICES_SERVICEHANDLE_H
 
// Local include(s):
#ifndef XAOD_STANDALONE
#   include "GaudiKernel/ServiceHandle.h"
#else // not XAOD_STANDALONE
 
// System include(s):
#include <string>
#include <iosfwd>
 
// Local include(s):
#include "AsgMessaging/StatusCode.h"
#include "AsgServices/ServiceStore.h"

 
class ServiceHandleBase
{
public:
  ServiceHandleBase( const std::string& typeAndName, const std::string& parentName );

   const std::string& typeAndName() const;
   const std::string& type() const;
   const std::string& name() const;
   const std::string& parentName() const;

   void setTypeAndName(const std::string& typeAndName);
   void setName(const std::string& name);
 
protected:
   std::string m_typeAndName;
   std::string m_type;
   std::string m_name;
   std::string m_parentName;
 
}; // class ServiceHandleBase

 
template< class T >
class ServiceHandle : public ServiceHandleBase
{
public:
   typedef T value_type;

   ServiceHandle( const std::shared_ptr<T>& pservice,
                  const std::string& parentName );

   ServiceHandle( const std::string& servicename, const std::string& parentName);

   template<typename T2>
   ServiceHandle (T2 *parent, const std::string& propertyName,
               const std::string& serviceName,
               const std::string& propertyTitle = "");

   T& operator*();
   const T& operator*() const;
   T* operator->();
   const T* operator->() const;

   StatusCode retrieve() const;

   void disable () noexcept;

   bool empty() const;

   bool isSet() const;
 
private:
   mutable std::shared_ptr<T> m_pservice;
 
}; // class ServiceHandle

template< class T >
std::ostream& operator<< ( std::ostream& out,
                           const ServiceHandle< T >& handle );
 
// Include the implementation of the code:
#include "AsgServices/ServiceHandle.icc"
 
#endif // not XAOD_STANDALONE
#endif // ASGSERVICES_SERVICEHANDLE_H