xAOD::TEventFormatRegistry Class Reference

Helper class for managing the event format for output files. More...

#include <TEventFormatRegistry.h>

Collaboration diagram for xAOD::TEventFormatRegistry:

Public Member Functions
EventFormat &	getEventFormat (const TFile *file) const
	Access the managed EventFormat object. More...
void	merge (const TFile *file, const EventFormat &ef)
	Merge the contents of another EventFormat object into the managed one. More...

Static Public Member Functions
static const TEventFormatRegistry &	instance ()
	Access the only instance of the object in memory. More...

Protected Member Functions
	TEventFormatRegistry ()
	Hidden constructor. More...

Protected Attributes
std::map< const TFile *, EventFormat >	m_eventFormats
	The process-wide event format object. More...

Detailed Description

Helper class for managing the event format for output files.

If the user wants to write a single output file with multiple event-level trees, we need to keep the output EventFormat objects of the multiple TEvent instances in sync. This singleton class helps out in this.

Author

Attila Krasznahorkay Attil.nosp@m.a.Kr.nosp@m.aszna.nosp@m.hork.nosp@m.ay@ce.nosp@m.rn.c.nosp@m.h

Definition at line 26 of file TEventFormatRegistry.h.

Constructor & Destructor Documentation

TEventFormatRegistry()

xAOD::TEventFormatRegistry::TEventFormatRegistry ( )

protected

Hidden constructor.

Definition at line 45 of file TEventFormatRegistry.cxx.

      : m_eventFormats() {
 
   }

Member Function Documentation

getEventFormat()

EventFormat & xAOD::TEventFormatRegistry::getEventFormat

(

const TFile *

file

)

const

Access the managed EventFormat object.

Definition at line 20 of file TEventFormatRegistry.cxx.

                                                                              {
 
      static std::mutex mutex;
      std::scoped_lock lock(mutex);
      auto this_nc ATLAS_THREAD_SAFE = const_cast<TEventFormatRegistry*>(this);
      return this_nc->m_eventFormats[ file ];
   }

instance()

const TEventFormatRegistry & xAOD::TEventFormatRegistry::instance ( )

static

Access the only instance of the object in memory.

Definition at line 14 of file TEventFormatRegistry.cxx.

                                                              {
 
      static const TEventFormatRegistry instance;
      return instance;
   }

merge()

void xAOD::TEventFormatRegistry::merge	(	const TFile *	file,
		const EventFormat &	ef
	)

Merge the contents of another EventFormat object into the managed one.

Definition at line 28 of file TEventFormatRegistry.cxx.

                                                             {
 
      // Get the local EventFormat object:
      EventFormat& localEf = getEventFormat( file );
 
      // Loop over the contents of the new object:
      EventFormat::const_iterator itr = ef.begin();
      EventFormat::const_iterator end = ef.end();
      for( ; itr != end; ++itr ) {
         // If it's already in the output, continue:
         if( localEf.exists( itr->first ) ) continue;
         // If not, let's add it:
         localEf.add( *( ef.get( itr->first ) ) );
      }
   }

Member Data Documentation

m_eventFormats

std::map< const TFile*, EventFormat > xAOD::TEventFormatRegistry::m_eventFormats

protected

The process-wide event format object.

Definition at line 43 of file TEventFormatRegistry.h.

---

The documentation for this class was generated from the following files:

• TEventFormatRegistry.h
• TEventFormatRegistry.cxx