xAOD::TChainStateTracker Class Reference

#include <TChainStateTracker.h>

List of all members.

Public Member Functions
	TChainStateTracker ()
	Default constructor.
virtual ::Bool_t	Notify ()
	Function called when the TChain opens a new input file.
::Bool_t	internalStateChanged () const
	Check whether there was an internal state change without us knowing.
void	reset ()
	Reset the object.

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Detailed Description

Class helping with tracking the state of TChain objects

TChains are tricky. Depending on the user's usage pattern, the TChain object given to a TEvent object may change its internal state without the TEvent object knowing. In which case the internal state of TEvent becomes inconsistent.

Such an object is used by TEvent to know when the TChain given to it has changed the currently opened file. So that it can re-initialise its internal state correctly when this happens.

Author:

Attila Krasznahorkay <Attila.Krasznahorkay@cern.ch>

Revision

619763

Date

2014-10-03 10:36:08 +0200 (Fri, 03 Oct 2014)

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

• /cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/xAODRootAccess/xAODRootAccess/tools/TChainStateTracker.h
• /cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/xAODRootAccess/Root/TChainStateTracker.cxx