Public Member Functions
	BranchCache (BranchReader &, size_t maxRecordsToCache)

HFShowerPhotonCollection	getRecord (int) const

Private Attributes
std::vector< std::size_t >	offsets_

HFShowerPhotonCollection	photons_

Detailed Description

Definition at line 124 of file HFShowerLibrary.h.

Constructor & Destructor Documentation

◆ BranchCache()

HFShowerLibrary::BranchCache::BranchCache	(	HFShowerLibrary::BranchReader &	iReader,
		size_t	maxRecordsToCache
	)

explicit

Definition at line 413 of file HFShowerLibrary.cc.

References filterCSVwithJSON::copy, HFShowerLibrary::BranchReader::getRecord(), run3scouting_cff::nPhotons, HFShowerLibrary::BranchReader::numberOfRecords(), HLT_IsoTrack_cff::offset, offsets_, photons_, and alignCSCRings::r.

                                                                                                       {
   auto nRecords = iReader.numberOfRecords();
   if (nRecords > maxRecordsToCache) {
     nRecords = maxRecordsToCache;
   }
   offsets_.reserve(nRecords + 1);
 
   //first pass is to figure out how much space will be needed
   size_t nPhotons = 0;
   for (size_t r = 0; r < nRecords; ++r) {
     auto shower = iReader.getRecord(r + 1);
     nPhotons += shower.size();
   }
 
   photons_.reserve(nPhotons);
 
   size_t offset = 0;
   for (size_t r = 0; r < nRecords; ++r) {
     offsets_.emplace_back(offset);
     auto shower = iReader.getRecord(r + 1);
     offset += shower.size();
     std::copy(shower.begin(), shower.end(), std::back_inserter(photons_));
   }
   offsets_.emplace_back(offset);
   photons_.shrink_to_fit();
 }

Member Function Documentation

◆ getRecord()

HFShowerPhotonCollection HFShowerLibrary::BranchCache::getRecord ( int iRecord ) const

Definition at line 459 of file HFShowerLibrary.cc.

References cms::cuda::assert(), mps_fire::end, and isotrackNtupler::start.

                                                                                 {
   assert(iRecord > 0);
   assert(static_cast<size_t>(iRecord + 1) < offsets_.size());
 
   auto start = offsets_[iRecord - 1];
   auto end = offsets_[iRecord];
 
   return HFShowerPhotonCollection(photons_.begin() + start, photons_.begin() + end);
 }

Member Data Documentation

◆ offsets_

std::vector<std::size_t> HFShowerLibrary::BranchCache::offsets_

private

Definition at line 130 of file HFShowerLibrary.h.

Referenced by BranchCache().

◆ photons_

HFShowerPhotonCollection HFShowerLibrary::BranchCache::photons_