genie::evtlib::RecordLoader Class Reference

Helper for. More...

#include <EvtLibRecordList.h>

Public Member Functions
	RecordLoader (TTree *tree)
	~RecordLoader ()
long	NRecords () const
EvtLibRecord	GetRecord (int i) const

Protected Attributes
TTree *	fTree
float	Enu
int	prod_id
int	nparts
int	pdgs [kEvtLibMaxParts]
float	Es [kEvtLibMaxParts]
float	px [kEvtLibMaxParts]
float	py [kEvtLibMaxParts]
float	pz [kEvtLibMaxParts]

Detailed Description

Helper for.

References:

SimpleRecordList and

References:

OnDemandRecordList

Definition at line 52 of file EvtLibRecordList.h.

Constructor & Destructor Documentation

genie::evtlib::RecordLoader::RecordLoader

(

TTree *

tree

)

Definition at line 36 of file EvtLibRecordList.cxx.

References Enu, Es, fTree, nparts, pdgs, prod_id, px, py, and pz.

    : fTree(tree)
  {
    fTree->SetBranchAddress("Enu", &Enu);
    fTree->SetBranchAddress("prod_id", &prod_id);

    fTree->SetBranchAddress("nparts", &nparts);

    fTree->SetBranchAddress("pdg", &pdgs);
    fTree->SetBranchAddress("E", &Es);
    fTree->SetBranchAddress("px", &px);
    fTree->SetBranchAddress("py", &py);
    fTree->SetBranchAddress("pz", &pz);
  }

genie::evtlib::RecordLoader::~RecordLoader

(

)

Definition at line 52 of file EvtLibRecordList.cxx.

  {
  }

Member Function Documentation

EvtLibRecord genie::evtlib::RecordLoader::GetRecord

(

int

i

)

const

Definition at line 63 of file EvtLibRecordList.cxx.

References Enu, Es, fTree, genie::evtlib::kEvtLibMaxParts, LOG, nparts, pdgs, pFATAL, prod_id, px, py, and pz.

Referenced by genie::evtlib::OnDemandRecordList::GetRecord(), and genie::evtlib::SimpleRecordList::SimpleRecordList().

  {
    fTree->GetEntry(i);

    // The event library ROOT format is as minimalistic as possible. We use
    // variable-sized arrays for the particle list. Because the address of
    // `parts` had to be provided to SetBranchAddress up-front we had to pick
    // a fixed size. If the list was actually longer we're in trouble and
    // should bail out. This seems extremely unlikely to be a problem in
    // practice, and we can always increase the constant to something larger.
    if(nparts > kEvtLibMaxParts){
      LOG("ELI", pFATAL) << "Too many particles " << nparts << "(limit " << kEvtLibMaxParts << ")";
      exit(1);
    }

    std::vector<EvtLibParticle> parts(nparts);
    for(int j = 0; j < nparts; ++j){
      parts[j].pdg = pdgs[j];
      parts[j].E = Es[j];
      parts[j].px = px[j];
      parts[j].py = py[j];
      parts[j].pz = pz[j];
    } // end for j

    return EvtLibRecord(Enu, prod_id, parts);
  }

long genie::evtlib::RecordLoader::NRecords

(

)

const

Definition at line 57 of file EvtLibRecordList.cxx.

References fTree.

Referenced by genie::evtlib::SimpleRecordList::SimpleRecordList().

  {
    return fTree->GetEntries();
  }

Member Data Documentation

float genie::evtlib::RecordLoader::Enu

protected

Definition at line 63 of file EvtLibRecordList.h.

Referenced by GetRecord(), and RecordLoader().

float genie::evtlib::RecordLoader::Es[kEvtLibMaxParts]

protected

Definition at line 67 of file EvtLibRecordList.h.

Referenced by GetRecord(), and RecordLoader().

TTree* genie::evtlib::RecordLoader::fTree

protected

Definition at line 61 of file EvtLibRecordList.h.

Referenced by GetRecord(), NRecords(), and RecordLoader().

int genie::evtlib::RecordLoader::nparts

protected

Definition at line 65 of file EvtLibRecordList.h.

Referenced by GetRecord(), and RecordLoader().

int genie::evtlib::RecordLoader::pdgs[kEvtLibMaxParts]

protected

Definition at line 66 of file EvtLibRecordList.h.

Referenced by GetRecord(), and RecordLoader().

int genie::evtlib::RecordLoader::prod_id

protected

Definition at line 64 of file EvtLibRecordList.h.

Referenced by GetRecord(), and RecordLoader().

float genie::evtlib::RecordLoader::px[kEvtLibMaxParts]

protected

Definition at line 68 of file EvtLibRecordList.h.

Referenced by GetRecord(), and RecordLoader().

float genie::evtlib::RecordLoader::py[kEvtLibMaxParts]

protected

Definition at line 68 of file EvtLibRecordList.h.

Referenced by GetRecord(), and RecordLoader().

float genie::evtlib::RecordLoader::pz[kEvtLibMaxParts]

protected

Definition at line 68 of file EvtLibRecordList.h.

Referenced by GetRecord(), and RecordLoader().

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

• EvtLibRecordList.h
• EvtLibRecordList.cxx