CP::IEfficiencyScaleFactorTool Class Reference

#include <IEfficiencyScaleFactorTool.h>

Inheritance diagram for CP::IEfficiencyScaleFactorTool:

List of all members.

Public Member Functions
virtual	~IEfficiencyScaleFactorTool ()
	Default destructor.
virtual CorrectionCode	getEfficiencyScaleFactor (const xAOD::IParticle &p, double &sf) const =0
virtual CorrectionCode	applyEfficiencyScaleFactor (const xAOD::IParticle &p) const =0

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Detailed Description

General interface for tools providing analysis efficiency scale factors

This is a generic interface that should be implemented by all analysis tools that provide efficiency scale factors for xAOD::IParticle type objects.

Note:

If your tool needs type specific variables that the xAOD::IParticle interface doesn't provide, please rely on the xAOD::IParticle::type() function to identify whether you received an appropriate object. And then use static_cast to cast the reference to the right type. Like:

 {.cpp}
 if( p.type() != xAOD::Type::Electron ) {
    ATH_MSG_ERROR( "Object of wrong type (" << p.type() << ") received" );
    return CP::CorrectionCode::Error;
 }
 const xAOD::Electron& el = static_cast< const xAOD::Electron& >( p );

Just be very careful about writing the code correctly, as a wrong static_cast could lead to memory corruption. But since its much faster than dynamic_cast, it's still recommended to use this sort of code.

Revision

790193

Date

2016-12-16 17:36:15 +0100 (Fri, 16 Dec 2016)

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Member Function Documentation

virtual CorrectionCode CP::IEfficiencyScaleFactorTool::applyEfficiencyScaleFactor

(

const xAOD::IParticle &

p

)

const [pure virtual]

Decorate a particle with its efficiency scale factor

This function can be used to decorate a particle type object with an efficiency scale factor. The name and type of the scale factor variable is up to the specific tool implementation.

Parameters:

p

The particle for which a scale factor is to be calculated

Returns:

CP::CorrectionCode::Error in case of a serious problem, CP::CorrectionCode::OutOfValidityRange if no scale factor is available for the received object, or CP::CorrectionCode::Ok if the scale factor could be correctly provided

Implemented in CP::ElectronChargeEfficiencyCorrectionTool.

virtual CorrectionCode CP::IEfficiencyScaleFactorTool::getEfficiencyScaleFactor	(	const xAOD::IParticle &	p,
		double &	sf
	)			const [pure virtual]

Retrieve an efficiency scale factor for a particle type object

This function is used to retrieve the efficiency scale factor for a specific particle object.

Parameters:

	p	The particle for which a scale factor is to be calculated
	sf	A reference to the scale factor variable to be set

Returns:

CP::CorrectionCode::Error in case of a serious problem, CP::CorrectionCode::OutOfValidityRange if no scale factor is available for the received object, or CP::CorrectionCode::Ok if the scale factor could be correctly provided

Implemented in CP::ElectronChargeEfficiencyCorrectionTool.

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

• /cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/AsgAnalysisInterfaces/AsgAnalysisInterfaces/IEfficiencyScaleFactorTool.h