#include <DecayInFlyTruthTrajectoryBuilder.h>

Inheritance diagram for Trk::DecayInFlyTruthTrajectoryBuilder:

Collaboration diagram for Trk::DecayInFlyTruthTrajectoryBuilder:

Public Types
typedef std::pair< HepMC::ConstGenParticlePtr, HepMC::ConstGenParticlePtr >	MotherDaughter
	Return type for the next method.

Public Member Functions
	DecayInFlyTruthTrajectoryBuilder (const std::string &type, const std::string &name, const IInterface *parent)
virtual StatusCode	initialize ()
void	buildTruthTrajectory (TruthTrajectory *result, const HepMC::ConstGenParticlePtr &input) const
	Build a TruthTrajectory this particle belongs to.
HepMC::ConstGenParticlePtr	getMother (const HepMC::ConstGenParticlePtr &particle) const
	Returns an umambiguous mother of the truth particle on a TruthTrajectory, or 0.
HepMC::ConstGenParticlePtr	getDaughter (const HepMC::ConstGenParticlePtr &particle) const
	Returns an umambiguous daughter of the truth particle on a TruthTrajectory, or 0.
ServiceHandle< StoreGateSvc > &	evtStore ()
	The standard `StoreGateSvc` (event store) Returns (kind of) a pointer to the `StoreGateSvc`.
const ServiceHandle< StoreGateSvc > &	detStore () const
	The standard `StoreGateSvc/DetectorStore` Returns (kind of) a pointer to the `StoreGateSvc`.
virtual StatusCode	sysInitialize () override
	Perform system initialization for an algorithm.
virtual StatusCode	sysStart () override
	Handle START transition.
virtual std::vector< Gaudi::DataHandle * >	inputHandles () const override
	Return this algorithm's input handles.
virtual std::vector< Gaudi::DataHandle * >	outputHandles () const override
	Return this algorithm's output handles.
Gaudi::Details::PropertyBase &	declareProperty (Gaudi::Property< T, V, H > &t)
void	updateVHKA (Gaudi::Details::PropertyBase &)
MsgStream &	msg () const
bool	msgLvl (const MSG::Level lvl) const

Static Public Member Functions
static MotherDaughter	truthTrajectoryCuts (const HepMC::ConstGenVertexPtr &vtx)
	Decides if the vertex connects two particles on the same TruthTrajectory.
static const InterfaceID &	interfaceID ()

Protected Member Functions
void	renounceArray (SG::VarHandleKeyArray &handlesArray)
	remove all handles from I/O resolution
std::enable_if_t< std::is_void_v< std::result_of_t< decltype(&T::renounce)(T)> > &&!std::is_base_of_v< SG::VarHandleKeyArray, T > &&std::is_base_of_v< Gaudi::DataHandle, T >, void >	renounce (T &h)
void	extraDeps_update_handler (Gaudi::Details::PropertyBase &ExtraDeps)
	Add StoreName to extra input/output deps as needed.

Private Types
typedef ServiceHandle< StoreGateSvc >	StoreGateSvc_t

Private Member Functions
Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T, V, H > &hndl, const SG::VarHandleKeyType &)
	specialization for handling Gaudi::Property<SG::VarHandleKey>

Private Attributes
StoreGateSvc_t	m_evtStore
	Pointer to StoreGate (event store by default)
StoreGateSvc_t	m_detStore
	Pointer to StoreGate (detector store by default)
std::vector< SG::VarHandleKeyArray * >	m_vhka
bool	m_varHandleArraysDeclared

Detailed Description

Definition at line 17 of file DecayInFlyTruthTrajectoryBuilder.h.

Member Typedef Documentation

◆ MotherDaughter

typedef std::pair<HepMC::ConstGenParticlePtr,HepMC::ConstGenParticlePtr> Trk::DecayInFlyTruthTrajectoryBuilder::MotherDaughter

Return type for the next method.

Definition at line 39 of file DecayInFlyTruthTrajectoryBuilder.h.

◆ StoreGateSvc_t

typedef ServiceHandle<StoreGateSvc> AthCommonDataStore< AthCommonMsg< AlgTool > >::StoreGateSvc_t

privateinherited

Definition at line 388 of file AthCommonDataStore.h.

Constructor & Destructor Documentation

◆ DecayInFlyTruthTrajectoryBuilder()

Trk::DecayInFlyTruthTrajectoryBuilder::DecayInFlyTruthTrajectoryBuilder	(	const std::string &	type,
		const std::string &	name,
		const IInterface *	parent )

Definition at line 23 of file DecayInFlyTruthTrajectoryBuilder.cxx.

  :  AthAlgTool(type,name,parent)
{
  declareInterface<Trk::ITruthTrajectoryBuilder>(this);
}

Member Function Documentation

◆ buildTruthTrajectory()

void Trk::DecayInFlyTruthTrajectoryBuilder::buildTruthTrajectory	(	TruthTrajectory *	result,
		const HepMC::ConstGenParticlePtr &	input ) const

virtual

Build a TruthTrajectory this particle belongs to.

The result may be an empty TruthTrajectory (in case input did not pass the cuts).

Implements Trk::ITruthTrajectoryBuilder.

Definition at line 39 of file DecayInFlyTruthTrajectoryBuilder.cxx.

{
  result->clear();
  if (input) {
    HepMC::ConstGenParticlePtr  next{nullptr};
    HepMC::ConstGenParticlePtr  current = input;
 
    // Extend trajectory outwards.  The last particle should go at [0]
    // in the TruthTrajectory, so we need to use a tmp storage while
    // traversing the structure.
    std::stack<HepMC::ConstGenParticlePtr> tmp;
    while ( (next = getDaughter(current)) ) {
      tmp.push(current = next);
    }
 
    // All particles in the TruthTrajectory will be from the same GenEvent
    const int eventNumber = input->parent_event()->event_number();
 
    // copy the outer half to result
    while (!tmp.empty()) {
      result->emplace_back(tmp.top(), eventNumber, HepMcParticleLink::IS_EVENTNUM);
      tmp.pop();
    }
 
    // The input particle itself
    result->emplace_back(input, eventNumber, HepMcParticleLink::IS_EVENTNUM);
 
    // Now continue towards the interaction point
    while ( (next = getMother(current)) ) {
      result->emplace_back(current = next, eventNumber, HepMcParticleLink::IS_EVENTNUM);
    }
  }
}

◆ declareGaudiProperty()

Gaudi::Details::PropertyBase & AthCommonDataStore< AthCommonMsg< AlgTool > >::declareGaudiProperty	(	Gaudi::Property< T, V, H > &	hndl,
		const SG::VarHandleKeyType &	)

inlineprivateinherited

specialization for handling Gaudi::Property<SG::VarHandleKey>

Definition at line 156 of file AthCommonDataStore.h.

  {
    return *AthCommonDataStore<PBASE>::declareProperty(hndl.name(),
                                                       hndl.value(), 
                                                       hndl.documentation());
 
  }

◆ declareProperty()

Gaudi::Details::PropertyBase & AthCommonDataStore< AthCommonMsg< AlgTool > >::declareProperty ( Gaudi::Property< T, V, H > & t )

inlineinherited

Definition at line 145 of file AthCommonDataStore.h.

                                                                     {
    typedef typename SG::HandleClassifier<T>::type htype;
    return AthCommonDataStore<PBASE>::declareGaudiProperty(t, htype());
  }

◆ detStore()

const ServiceHandle< StoreGateSvc > & AthCommonDataStore< AthCommonMsg< AlgTool > >::detStore ( ) const

inlineinherited

The standard StoreGateSvc/DetectorStore Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 95 of file AthCommonDataStore.h.

95{ return m_detStore; }

AthCommonDataStore< AthCommonMsg< AlgTool > >::m_detStore

StoreGateSvc_t m_detStore

Definition AthCommonDataStore.h:393

◆ evtStore()

ServiceHandle< StoreGateSvc > & AthCommonDataStore< AthCommonMsg< AlgTool > >::evtStore ( )

inlineinherited

The standard StoreGateSvc (event store) Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 85 of file AthCommonDataStore.h.

85{ return m_evtStore; }

AthCommonDataStore< AthCommonMsg< AlgTool > >::m_evtStore

StoreGateSvc_t m_evtStore

Definition AthCommonDataStore.h:390

◆ extraDeps_update_handler()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::extraDeps_update_handler ( Gaudi::Details::PropertyBase & ExtraDeps )

protectedinherited

Add StoreName to extra input/output deps as needed.

use the logic of the VarHandleKey to parse the DataObjID keys supplied via the ExtraInputs and ExtraOuputs Properties to add the StoreName if it's not explicitly given

◆ getDaughter()

HepMC::ConstGenParticlePtr Trk::DecayInFlyTruthTrajectoryBuilder::getDaughter ( const HepMC::ConstGenParticlePtr & particle ) const

virtual

Returns an umambiguous daughter of the truth particle on a TruthTrajectory, or 0.

This assumes no one mother can correspond to no more than one daughter. Implemented via truthTrajectoryCuts().

Implements Trk::ITruthTrajectoryBuilder.

Definition at line 131 of file DecayInFlyTruthTrajectoryBuilder.cxx.

                                                                                                                   {
  if(mother) {
    MotherDaughter res = truthTrajectoryCuts(mother->end_vertex());
    if(res.first == mother) return res.second;
  }
  return {nullptr};
}

◆ getMother()

HepMC::ConstGenParticlePtr Trk::DecayInFlyTruthTrajectoryBuilder::getMother ( const HepMC::ConstGenParticlePtr & particle ) const

virtual

Returns an umambiguous mother of the truth particle on a TruthTrajectory, or 0.

Implemented via truthTrajectoryCuts().

Implements Trk::ITruthTrajectoryBuilder.

Definition at line 140 of file DecayInFlyTruthTrajectoryBuilder.cxx.

                                                                                                                   {
  if(daughter) {
    MotherDaughter res = truthTrajectoryCuts(daughter->production_vertex());
    if(res.second == daughter) return res.first;
  }
  return {nullptr};
}

◆ initialize()

StatusCode Trk::DecayInFlyTruthTrajectoryBuilder::initialize ( )

virtual

Definition at line 34 of file DecayInFlyTruthTrajectoryBuilder.cxx.

                                                        {
  return StatusCode::SUCCESS;
}

◆ inputHandles()

virtual std::vector< Gaudi::DataHandle * > AthCommonDataStore< AthCommonMsg< AlgTool > >::inputHandles ( ) const

overridevirtualinherited

Return this algorithm's input handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

◆ interfaceID()

const InterfaceID & Trk::ITruthTrajectoryBuilder::interfaceID ( )

inlinestaticinherited

Definition at line 27 of file ITruthTrajectoryBuilder.h.

27{ return IID_ITruthTrajectoryBuilder; }

Trk::IID_ITruthTrajectoryBuilder

static const InterfaceID IID_ITruthTrajectoryBuilder("Trk::ITruthTrajectoryBuilder", 1, 0)

◆ msg()

MsgStream & AthCommonMsg< AlgTool >::msg ( ) const

inlineinherited

Definition at line 24 of file AthCommonMsg.h.

                                {
    return this->msgStream();
  }

◆ msgLvl()

bool AthCommonMsg< AlgTool >::msgLvl ( const MSG::Level lvl ) const

inlineinherited

Definition at line 30 of file AthCommonMsg.h.

                                               {
    return this->msgLevel(lvl);
  }

◆ outputHandles()

virtual std::vector< Gaudi::DataHandle * > AthCommonDataStore< AthCommonMsg< AlgTool > >::outputHandles ( ) const

overridevirtualinherited

Return this algorithm's output handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

◆ renounce()

std::enable_if_t< std::is_void_v< std::result_of_t< decltype(&T::renounce)(T)> > &&!std::is_base_of_v< SG::VarHandleKeyArray, T > &&std::is_base_of_v< Gaudi::DataHandle, T >, void > AthCommonDataStore< AthCommonMsg< AlgTool > >::renounce ( T & h )

inlineprotectedinherited

Definition at line 380 of file AthCommonDataStore.h.

  {
    h.renounce();
    PBASE::renounce (h);
  }

◆ renounceArray()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::renounceArray ( SG::VarHandleKeyArray & handlesArray )

inlineprotectedinherited

remove all handles from I/O resolution

Definition at line 364 of file AthCommonDataStore.h.

                                                          {
    handlesArray.renounce();
  }

◆ sysInitialize()

virtual StatusCode AthCommonDataStore< AthCommonMsg< AlgTool > >::sysInitialize ( )

overridevirtualinherited

Perform system initialization for an algorithm.

We override this to declare all the elements of handle key arrays at the end of initialization. See comments on updateVHKA.

Reimplemented in asg::AsgMetadataTool, AthCheckedComponent< AthAlgTool >, AthCheckedComponent<::AthAlgTool >, and DerivationFramework::CfAthAlgTool.

◆ sysStart()

virtual StatusCode AthCommonDataStore< AthCommonMsg< AlgTool > >::sysStart ( )

overridevirtualinherited

Handle START transition.

We override this in order to make sure that conditions handle keys can cache a pointer to the conditions container.

◆ truthTrajectoryCuts()

DecayInFlyTruthTrajectoryBuilder::MotherDaughter Trk::DecayInFlyTruthTrajectoryBuilder::truthTrajectoryCuts ( const HepMC::ConstGenVertexPtr & vtx )

static

Decides if the vertex connects two particles on the same TruthTrajectory.

Returns the (mother,daughter) pair, where either of the two can be NULL.

This interface implies that there is one-to-one correspondence between mother and daughter particles; i.e. TruthTrajectories are not allowed to branch.

Definition at line 76 of file DecayInFlyTruthTrajectoryBuilder.cxx.

{
  HepMC::ConstGenParticlePtr mother{nullptr};
  HepMC::ConstGenParticlePtr daughter{nullptr};
     // only truth vertices with 1 incoming particle     
      // Restrict to quasi-elastic processes (e.g. brems, delta-rays, pi->pi+Delta).
      // 
      // Require not more than 2 outgoing particles. Note that
      // delta-rays for primary==electron is a special case, because we have two
      // outgoing particles with the same PDG id.  The "correct" one
      // is that with the higher energy (NOT pt).
      // 
      // allow 1 outgoing to cover possible vertexes from interaction in detector material
  if(vtx && (vtx->particles_in_size() == 1) && (vtx->particles_out_size() <= 2) ) {
 
#ifdef HEPMC3
    mother = vtx->particles_in().front();
#else 
    mother = *vtx->particles_in_const_begin();
#endif    
    // Allow status code 1 and 2.  E.g. a pion that produced a long track can decay  outside of InDet and have status==2.
    if( mother && MC::isPhysical(mother) ) {
 
    int num_passed_cuts = 0;
    HepMC::ConstGenParticlePtr passed_cuts{nullptr};
    for(const HepMC::ConstGenParticlePtr& candidate: *vtx){
      if(candidate->pdg_id() == mother->pdg_id()) {
 
        if(passed_cuts && MC::isElectron(mother)) { // second negative electron is a special case
          if(candidate->momentum().e() > passed_cuts->momentum().e()) {
        passed_cuts = candidate; // don't increment num_passed_cuts, we are replacing chosen particle
          }
        }
        else {
          passed_cuts = candidate;
          ++num_passed_cuts;
        }
      }
      // allow pi/k->mu decay
      else if(std::abs(candidate->pdg_id()) == 13){
        passed_cuts = candidate;
        ++num_passed_cuts;
      }
    }
 
    if(num_passed_cuts==1) { // disallow hadronic pi->N*pi etc.
      daughter = std::move(passed_cuts);
    }
    }
  }
  
  return std::make_pair(mother, daughter);
}

◆ updateVHKA()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::updateVHKA ( Gaudi::Details::PropertyBase & )

inlineinherited

Definition at line 308 of file AthCommonDataStore.h.

                                               {
    // debug() << "updateVHKA for property " << p.name() << " " << p.toString() 
    //         << "  size: " << m_vhka.size() << endmsg;
    for (auto &a : m_vhka) {
      std::vector<SG::VarHandleKey*> keys = a->keys();
      for (auto k : keys) {
        k->setOwner(this);
      }
    }
  }

Member Data Documentation

◆ m_detStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< AlgTool > >::m_detStore

privateinherited

Pointer to StoreGate (detector store by default)

Definition at line 393 of file AthCommonDataStore.h.

◆ m_evtStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< AlgTool > >::m_evtStore

privateinherited

Pointer to StoreGate (event store by default)

Definition at line 390 of file AthCommonDataStore.h.

◆ m_varHandleArraysDeclared

bool AthCommonDataStore< AthCommonMsg< AlgTool > >::m_varHandleArraysDeclared

privateinherited

Definition at line 399 of file AthCommonDataStore.h.

◆ m_vhka

std::vector<SG::VarHandleKeyArray*> AthCommonDataStore< AthCommonMsg< AlgTool > >::m_vhka

privateinherited

Definition at line 398 of file AthCommonDataStore.h.

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

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Private Types

Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

◆ MotherDaughter

◆ StoreGateSvc_t

Constructor & Destructor Documentation

◆ DecayInFlyTruthTrajectoryBuilder()

Member Function Documentation

◆ buildTruthTrajectory()

◆ declareGaudiProperty()

◆ declareProperty()

◆ detStore()

◆ evtStore()

◆ extraDeps_update_handler()

◆ getDaughter()

◆ getMother()

◆ initialize()

◆ inputHandles()

◆ interfaceID()

◆ msg()

◆ msgLvl()

◆ outputHandles()

◆ renounce()

◆ renounceArray()

◆ sysInitialize()

◆ sysStart()

◆ truthTrajectoryCuts()

◆ updateVHKA()

Member Data Documentation

◆ m_detStore

◆ m_evtStore

◆ m_varHandleArraysDeclared

◆ m_vhka