genie::evtlib::OnDemandRecordList Class Reference

#include <EvtLibRecordList.h>

Inheritance diagram for genie::evtlib::OnDemandRecordList:

Collaboration diagram for genie::evtlib::OnDemandRecordList:

Public Member Functions
	OnDemandRecordList (TTree *tree, const std::string &prettyName)
virtual	~OnDemandRecordList ()
const EvtLibRecord *	GetRecord (float E) const override
Public Member Functions inherited from genie::evtlib::IEvtLibRecordList
virtual	~IEvtLibRecordList ()

Protected Member Functions
void	LoadIndex () const

Protected Attributes
TTree *	fTree
std::string	fPrettyName
RecordLoader *	fLoader
std::vector< std::pair< float, int > >	fEnergies
EvtLibRecord	fRecord

Detailed Description

Definition at line 84 of file EvtLibRecordList.h.

Constructor & Destructor Documentation

genie::evtlib::OnDemandRecordList::OnDemandRecordList	(	TTree *	tree,
		const std::string &	prettyName
	)

Definition at line 118 of file EvtLibRecordList.cxx.

    : fTree(tree), fPrettyName(prettyName), fLoader(0)
  {
  }

virtual genie::evtlib::OnDemandRecordList::~OnDemandRecordList ( )

inlinevirtual

Definition at line 88 of file EvtLibRecordList.h.

References fLoader.

{delete fLoader;}

Member Function Documentation

const EvtLibRecord * genie::evtlib::OnDemandRecordList::GetRecord ( float  E ) const

overridevirtual

Implements genie::evtlib::IEvtLibRecordList.

Definition at line 146 of file EvtLibRecordList.cxx.

References fEnergies, fLoader, fRecord, fTree, genie::evtlib::RecordLoader::GetRecord(), and LoadIndex().

  {
    if(fEnergies.empty()){
      LoadIndex();
      // The loader must be created after the indices are loaded, because they
      // both want to set branch addresses in the TTree, and we ultimately need
      // the loader's to be active.
      fLoader = new RecordLoader(fTree);
    }

    auto it = std::lower_bound(fEnergies.begin(), fEnergies.end(),
                               std::make_pair(E, 0));
    if(it == fEnergies.end()) return 0;

    fRecord = fLoader->GetRecord(it->second);

    return &fRecord;
  }

void genie::evtlib::OnDemandRecordList::LoadIndex ( ) const

protected

Definition at line 124 of file EvtLibRecordList.cxx.

References fEnergies, fPrettyName, and fTree.

Referenced by GetRecord().

  {
    std::cout << "Loading index to " << fPrettyName;

    float Enu;
    fTree->SetBranchAddress("Enu", &Enu);

    const int N = fTree->GetEntries();
    fEnergies.reserve(N);

    for(int i = 0; i < N; ++i){
      if(i%(N/8) == 0) std::cout << "." << std::flush;
      fTree->GetEntry(i);

      fEnergies.emplace_back(Enu, i);
    } // end for i
    std::cout << std::endl;

    std::sort(fEnergies.begin(), fEnergies.end());
  }

Member Data Documentation

std::vector<std::pair<float, int> > genie::evtlib::OnDemandRecordList::fEnergies

mutableprotected

Definition at line 98 of file EvtLibRecordList.h.

Referenced by GetRecord(), and LoadIndex().

RecordLoader* genie::evtlib::OnDemandRecordList::fLoader

mutableprotected

Definition at line 96 of file EvtLibRecordList.h.

Referenced by GetRecord(), and ~OnDemandRecordList().

std::string genie::evtlib::OnDemandRecordList::fPrettyName

protected

Definition at line 95 of file EvtLibRecordList.h.

Referenced by LoadIndex().

EvtLibRecord genie::evtlib::OnDemandRecordList::fRecord

mutableprotected

Definition at line 100 of file EvtLibRecordList.h.

Referenced by GetRecord().

TTree* genie::evtlib::OnDemandRecordList::fTree

protected

Definition at line 94 of file EvtLibRecordList.h.

Referenced by GetRecord(), and LoadIndex().

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

• EvtLibRecordList.h
• EvtLibRecordList.cxx