EDM4hep/src/EDM4hepMeasurementReader.cpp

0001 // This file is part of the ACTS project.
0002 //
0003 // Copyright (C) 2016 CERN for the benefit of the ACTS project
0004 //
0005 // This Source Code Form is subject to the terms of the Mozilla Public
0006 // License, v. 2.0. If a copy of the MPL was not distributed with this
0007 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
0008
0009 #include "ActsExamples/Io/EDM4hep/EDM4hepMeasurementReader.hpp"
0010
0011 #include "Acts/Definitions/Units.hpp"
0012 #include "Acts/Plugins/EDM4hep/TrackerHitCompatibility.hpp"
0013 #include "Acts/Plugins/Podio/PodioUtil.hpp"
0014 #include "ActsExamples/EventData/Cluster.hpp"
0015 #include "ActsExamples/EventData/Measurement.hpp"
0016 #include "ActsExamples/Framework/WhiteBoard.hpp"
0017 #include "ActsExamples/Io/EDM4hep/EDM4hepUtil.hpp"
0018
0019 #include <list>
0020 #include <stdexcept>
0021
0022 #include <edm4hep/TrackerHitPlane.h>
0023 #include <edm4hep/TrackerHitPlaneCollection.h>
0024
0025 namespace ActsExamples {
0026
0027 EDM4hepMeasurementReader::EDM4hepMeasurementReader(
0028     const EDM4hepMeasurementReader::Config& config, Acts::Logging::Level level)
0029     : m_cfg(config),
0030       m_logger(Acts::getDefaultLogger("EDM4hepMeasurementReader", level)) {
0031   if (m_cfg.outputMeasurements.empty()) {
0032     throw std::invalid_argument("Missing measurement output collection");
0033   }
0034
0035   m_eventsRange = std::make_pair(0, reader().getEntries("events"));
0036
0037   m_outputMeasurements.initialize(m_cfg.outputMeasurements);
0038   m_outputMeasurementSimHitsMap.initialize(m_cfg.outputMeasurementSimHitsMap);
0039   m_outputClusters.maybeInitialize(m_cfg.outputClusters);
0040 }
0041
0042 std::string EDM4hepMeasurementReader::EDM4hepMeasurementReader::name() const {
0043   return "EDM4hepMeasurementReader";
0044 }
0045
0046 std::pair<std::size_t, std::size_t> EDM4hepMeasurementReader::availableEvents()
0047     const {
0048   return m_eventsRange;
0049 }
0050
0051 ProcessCode EDM4hepMeasurementReader::read(const AlgorithmContext& ctx) {
0052   MeasurementContainer measurements;
0053   ClusterContainer clusters;
0054   // TODO what about those?
0055   IndexMultimap<Index> measurementSimHitsMap;
0056
0057   podio::Frame frame = reader().readEntry("events", ctx.eventNumber);
0058
0059   const auto& trackerHitPlaneCollection =
0060       frame.get<edm4hep::TrackerHitPlaneCollection>("ActsTrackerHitsPlane");
0061   const auto& trackerHitRawCollection =
0062       frame.get<edm4hep::TrackerHit3DCollection>("ActsTrackerHitsRaw");
0063
0064   for (const auto& trackerHitPlane : trackerHitPlaneCollection) {
0065     Cluster cluster;
0066     EDM4hepUtil::readMeasurement(
0067         measurements, trackerHitPlane, &trackerHitRawCollection, &cluster,
0068         [](std::uint64_t cellId) { return Acts::GeometryIdentifier(cellId); });
0069
0070     clusters.push_back(std::move(cluster));
0071   }
0072
0073   // Write the data to the EventStore
0074   m_outputMeasurements(ctx, std::move(measurements));
0075   m_outputMeasurementSimHitsMap(ctx, std::move(measurementSimHitsMap));
0076   if (!m_cfg.outputClusters.empty()) {
0077     m_outputClusters(ctx, std::move(clusters));
0078   }
0079
0080   return ProcessCode::SUCCESS;
0081 }
0082
0083 Acts::PodioUtil::ROOTReader& EDM4hepMeasurementReader::reader() {
0084   bool exists = false;
0085   auto& reader = m_reader.local(exists);
0086   if (!exists) {
0087     reader.openFile(m_cfg.inputPath);
0088   }
0089
0090   return reader;
0091 }
0092
0093 }  // namespace ActsExamples