ATLAS Offline Software
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OptionalColumnExampleTool.cxx
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1/*
2 Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
3*/
4
6
7//
8// includes
9//
10
12
13//
14// method implementations
15//
16
17namespace columnar
18{
19 OptionalColumnExampleTool ::
20 OptionalColumnExampleTool (const std::string& name)
21 : AsgTool (name)
22 {}
23
24
25
26 StatusCode OptionalColumnExampleTool ::
27 initialize ()
28 {
29 // give the base class a chance to initialize the column accessor
30 // backends
31 ANA_CHECK (initializeColumns());
32 return StatusCode::SUCCESS;
33 }
34
35
36
37 void OptionalColumnExampleTool ::
38 callEvents (EventContextRange events) const
39 {
40 // loop over all events and particles. note that this is
41 // deliberately looping by value, as the ID classes are very small
42 // and can be copied cheaply. this could have also been written as
43 // a single loop over all particles in the event range, but I chose
44 // to split it up into two loops as most tools will need to do some
45 // per-event things, e.g. retrieve `EventInfo`.
46 for (columnar::EventContextId event : events)
47 {
48 for (columnar::ParticleId particle : particlesHandle(event))
49 {
50 // check if the corrected pt is available, and use it if it is
51 // and the default pt otherwise
52 if (ptCorrAcc.isAvailable(particle))
53 selectionDec(particle) = (ptCorrAcc(particle) > m_ptCut.value());
54 else
55 selectionDec(particle) = (ptAcc(particle) > m_ptCut.value());
56 }
57 }
58 }
59}
#define ANA_CHECK(EXP)
check whether the given expression was successful
AsgTool(const std::string &name)
Constructor specifying the tool instance's name.
Definition AsgTool.cxx:58
ParticleAccessor< ObjectColumn > particlesHandle
the object accessor for the particles
ParticleAccessor< float > ptAcc
the pt accessor for the particle container
Gaudi::Property< float > m_ptCut
the pt cut to apply
ParticleDecorator< char > selectionDec
the selection decorator for the particles
ParticleAccessor< float > ptCorrAcc
an accessor for an optional corrected pt
ObjectRange< ContainerId::eventContext > EventContextRange
ObjectId< ContainerId::particle > ParticleId
Definition ParticleDef.h:36
ObjectId< ContainerId::eventContext > EventContextId