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File indexing completed on 2025-06-08 22:25:16

 /*----------------------------------------------------------------------
 ----------------------------------------------------------------------*/
 
 #include "RootFile.h"
 #include "DuplicateChecker.h"
 #include "InputFile.h"
 #include "ProvenanceAdaptor.h"
 #include "RunHelper.h"
 #include "RootDelayedReaderBase.h"
 
 #include "DataFormats/Common/interface/setIsMergeable.h"
 #include "DataFormats/Common/interface/ThinnedAssociation.h"
 #include "DataFormats/Provenance/interface/ProductDescription.h"
 #include "DataFormats/Provenance/interface/BranchIDListHelper.h"
 #include "DataFormats/Provenance/interface/BranchType.h"
 #include "DataFormats/Provenance/interface/EventEntryInfo.h"
 #include "DataFormats/Provenance/interface/ParameterSetBlob.h"
 #include "DataFormats/Provenance/interface/ParentageRegistry.h"
 #include "DataFormats/Provenance/interface/ProcessHistoryID.h"
 #include "DataFormats/Provenance/interface/ProcessHistoryRegistry.h"
 #include "DataFormats/Provenance/interface/ProductRegistry.h"
 #include "DataFormats/Provenance/interface/StoredMergeableRunProductMetadata.h"
 #include "DataFormats/Provenance/interface/StoredProcessBlockHelper.h"
 #include "DataFormats/Provenance/interface/StoredProductProvenance.h"
 #include "DataFormats/Provenance/interface/ThinnedAssociationsHelper.h"
 #include "DataFormats/Provenance/interface/RunID.h"
 #include "FWCore/Common/interface/ProcessBlockHelper.h"
 #include "FWCore/Framework/interface/FileBlock.h"
 #include "FWCore/Framework/interface/EventPrincipal.h"
 #include "FWCore/Framework/interface/ProductSelector.h"
 #include "FWCore/Framework/interface/LuminosityBlockPrincipal.h"
 #include "FWCore/Framework/interface/MergeableRunProductMetadata.h"
 #include "FWCore/Framework/interface/ProcessBlockPrincipal.h"
 #include "FWCore/Framework/interface/RunPrincipal.h"
 #include "FWCore/Framework/interface/SharedResourcesAcquirer.h"
 #include "FWCore/Framework/interface/SharedResourcesRegistry.h"
 #include "FWCore/Framework/interface/DelayedReader.h"
 #include "FWCore/MessageLogger/interface/MessageLogger.h"
 #include "FWCore/ParameterSet/interface/ParameterSet.h"
 #include "FWCore/ParameterSet/interface/Registry.h"
 #include "FWCore/Sources/interface/EventSkipperByID.h"
 #include "FWCore/Sources/interface/DaqProvenanceHelper.h"
 #include "FWCore/ServiceRegistry/interface/ServiceRegistry.h"
 #include "FWCore/Utilities/interface/Algorithms.h"
 #include "FWCore/Utilities/interface/do_nothing_deleter.h"
 #include "FWCore/Utilities/interface/EDMException.h"
 #include "FWCore/Utilities/interface/FriendlyName.h"
 #include "FWCore/Utilities/interface/GlobalIdentifier.h"
 #include "FWCore/Utilities/interface/ReleaseVersion.h"
 #include "FWCore/Utilities/interface/stemFromPath.h"
 #include "FWCore/Utilities/interface/thread_safety_macros.h"
 #include "FWCore/Version/interface/GetReleaseVersion.h"
 #include "IOPool/Common/interface/getWrapperBasePtr.h"
 
 #include "FWCore/Concurrency/interface/WaitingTaskHolder.h"
 #include "FWCore/ServiceRegistry/interface/ModuleCallingContext.h"
 
 //used for backward compatibility
 #include "DataFormats/Provenance/interface/EventAux.h"
 #include "DataFormats/Provenance/interface/LuminosityBlockAux.h"
 #include "DataFormats/Provenance/interface/RunAux.h"
 #include "FWCore/ParameterSet/interface/ParameterSetConverter.h"
 
 #include "Rtypes.h"
 #include "TClass.h"
 #include "TString.h"
 #include "TTree.h"
 #include "TTreeCache.h"
 
 #include <algorithm>
 #include <cassert>
 #include <list>
 #include <iostream>
 
 namespace edm {
 
   // Algorithm classes for making ProvenanceReader:
   class MakeDummyProvenanceReader : public MakeProvenanceReader {
   public:
     std::unique_ptr<ProvenanceReaderBase> makeReader(RootTree& eventTree,
                                                      DaqProvenanceHelper const* daqProvenanceHelper) const override;
   };
   class MakeOldProvenanceReader : public MakeProvenanceReader {
   public:
     MakeOldProvenanceReader(std::unique_ptr<EntryDescriptionMap>&& entryDescriptionMap)
         : MakeProvenanceReader(), entryDescriptionMap_(std::move(entryDescriptionMap)) {}
     std::unique_ptr<ProvenanceReaderBase> makeReader(RootTree& eventTree,
                                                      DaqProvenanceHelper const* daqProvenanceHelper) const override;
 
   private:
     edm::propagate_const<std::unique_ptr<EntryDescriptionMap>> entryDescriptionMap_;
   };
   class MakeFullProvenanceReader : public MakeProvenanceReader {
   public:
     std::unique_ptr<ProvenanceReaderBase> makeReader(RootTree& eventTree,
                                                      DaqProvenanceHelper const* daqProvenanceHelper) const override;
   };
   class MakeReducedProvenanceReader : public MakeProvenanceReader {
   public:
     MakeReducedProvenanceReader(std::vector<ParentageID> const& parentageIDLookup)
         : parentageIDLookup_(parentageIDLookup) {}
     std::unique_ptr<ProvenanceReaderBase> makeReader(RootTree& eventTree,
                                                      DaqProvenanceHelper const* daqProvenanceHelper) const override;
 
   private:
     std::vector<ParentageID> const& parentageIDLookup_;
   };
 
   namespace {
     void checkReleaseVersion(std::vector<ProcessHistory> processHistoryVector, std::string const& fileName) {
       std::string releaseVersion = getReleaseVersion();
       releaseversion::DecomposedReleaseVersion currentRelease(releaseVersion);
       for (auto const& ph : processHistoryVector) {
         for (auto const& pc : ph) {
           if (releaseversion::isEarlierRelease(currentRelease, pc.releaseVersion())) {
             throw Exception(errors::FormatIncompatibility)
                 << "The release you are using, " << getReleaseVersion() << " , predates\n"
                 << "a release (" << pc.releaseVersion() << ") used in writing the input file, " << fileName << ".\n"
                 << "Forward compatibility cannot be supported.\n";
           }
         }
       }
     }
   }  // namespace
 
   // This is a helper class for IndexIntoFile.
   class RootFileEventFinder : public IndexIntoFile::EventFinder {
   public:
     explicit RootFileEventFinder(RootTree& eventTree) : eventTree_(eventTree) {}
     ~RootFileEventFinder() override {}
 
     EventNumber_t getEventNumberOfEntry(roottree::EntryNumber entry) const override {
       roottree::EntryNumber saveEntry = eventTree_.entryNumber();
       eventTree_.setEntryNumber(entry);
       EventAuxiliary eventAux;
       EventAuxiliary* pEvAux = &eventAux;
       eventTree_.fillAux<EventAuxiliary>(pEvAux);
       eventTree_.setEntryNumber(saveEntry);
       return eventAux.event();
     }
 
   private:
     RootTree& eventTree_;
   };
 
   //---------------------------------------------------------------------
   RootFile::RootFile(FileOptions&& fileOptions,
                      InputType inputType,
                      ProcessingOptions&& processingOptions,
                      TTreeOptions&& ttreeOptions,
                      ProductChoices&& productChoices,
                      CrossFileInfo&& crossFileInfo,
                      unsigned int nStreams,
                      ProcessHistoryRegistry& processHistoryRegistry,
                      std::vector<ProcessHistoryID>& orderedProcessHistoryIDs)
       : file_(fileOptions.fileName),
         logicalFile_(fileOptions.logicalFileName),
         processHistoryRegistry_(&processHistoryRegistry),
         filePtr_(fileOptions.filePtr),
         eventSkipperByID_(processingOptions.eventSkipperByID),
         fileFormatVersion_(),
         fid_(),
         indexIntoFileSharedPtr_(new IndexIntoFile),
         indexIntoFile_(*indexIntoFileSharedPtr_),
         indexIntoFileBegin_(indexIntoFile_.begin(
             processingOptions.noRunLumiSort ? IndexIntoFile::entryOrder
                                             : (processingOptions.noEventSort ? IndexIntoFile::firstAppearanceOrder
                                                                              : IndexIntoFile::numericalOrder))),
         indexIntoFileEnd_(indexIntoFileBegin_),
         indexIntoFileIter_(indexIntoFileBegin_),
         storedMergeableRunProductMetadata_((inputType == InputType::Primary) ? new StoredMergeableRunProductMetadata
                                                                              : nullptr),
         eventProcessHistoryIDs_(),
         eventProcessHistoryIter_(eventProcessHistoryIDs_.begin()),
         savedRunAuxiliary_(),
         skipAnyEvents_(processingOptions.skipAnyEvents),
         noRunLumiSort_(processingOptions.noRunLumiSort),
         noEventSort_(processingOptions.noEventSort),
         enforceGUIDInFileName_(fileOptions.enforceGUIDInFileName),
         whyNotFastClonable_(0),
         hasNewlyDroppedBranch_(),
         branchListIndexesUnchanged_(false),
         eventAuxCache_(),
         eventTree_(fileOptions.filePtr, InEvent, nStreams, ttreeOptions, roottree::defaultLearningEntries, inputType),
         lumiTree_(fileOptions.filePtr,
                   InLumi,
                   1,
                   ttreeOptions.usingDefaultNonEventOptions(),
                   roottree::defaultNonEventLearningEntries,
                   inputType),
         runTree_(fileOptions.filePtr,
                  InRun,
                  1,
                  ttreeOptions.usingDefaultNonEventOptions(),
                  roottree::defaultNonEventLearningEntries,
                  inputType),
         treePointers_(),
         lastEventEntryNumberRead_(IndexIntoFile::invalidEntry),
         productRegistry_(),
         branchIDLists_(),
         branchIDListHelper_(crossFileInfo.branchIDListHelper),
         processBlockHelper_(crossFileInfo.processBlockHelper),
         fileThinnedAssociationsHelper_(),
         thinnedAssociationsHelper_(crossFileInfo.thinnedAssociationsHelper),
         processingMode_(processingOptions.processingMode),
         runHelper_(crossFileInfo.runHelper),
         newBranchToOldBranch_(),
         eventHistoryTree_(nullptr),
         eventToProcessBlockIndexesBranch_(
             inputType == InputType::Primary
                 ? eventTree_.tree()->GetBranch(poolNames::eventToProcessBlockIndexesBranchName().c_str())
                 : nullptr),
         history_(),
         productDependencies_(new ProductDependencies),
         duplicateChecker_(crossFileInfo.duplicateChecker),
         provenanceAdaptor_(),
         provenanceReaderMaker_(),
         eventProductProvenanceRetrievers_(),
         parentageIDLookup_(),
         daqProvenanceHelper_(),
         edProductClass_(TypeWithDict::byName("edm::WrapperBase").getClass()),
         inputType_(inputType) {
     hasNewlyDroppedBranch_.fill(false);
 
     treePointers_.resize(3);
     treePointers_[InEvent] = &eventTree_;
     treePointers_[InLumi] = &lumiTree_;
     treePointers_[InRun] = &runTree_;
 
     // Read the metadata tree.
     // We use a smart pointer so the tree will be deleted after use, and not kept for the life of the file.
     std::unique_ptr<TTree> metaDataTree(dynamic_cast<TTree*>(filePtr_->Get(poolNames::metaDataTreeName().c_str())));
     if (nullptr == metaDataTree.get()) {
       throw Exception(errors::FileReadError)
           << "Could not find tree " << poolNames::metaDataTreeName() << " in the input file.\n";
     }
 
     // To keep things simple, we just read in every possible branch that exists.
     // We don't pay attention to which branches exist in which file format versions
 
     FileFormatVersion* fftPtr = &fileFormatVersion_;
     if (metaDataTree->FindBranch(poolNames::fileFormatVersionBranchName().c_str()) != nullptr) {
       TBranch* fft = metaDataTree->GetBranch(poolNames::fileFormatVersionBranchName().c_str());
       fft->SetAddress(&fftPtr);
       roottree::getEntry(fft, 0);
       metaDataTree->SetBranchAddress(poolNames::fileFormatVersionBranchName().c_str(), &fftPtr);
     }
 
     FileID* fidPtr = &fid_;
     if (metaDataTree->FindBranch(poolNames::fileIdentifierBranchName().c_str()) != nullptr) {
       metaDataTree->SetBranchAddress(poolNames::fileIdentifierBranchName().c_str(), &fidPtr);
     }
 
     IndexIntoFile* iifPtr = &indexIntoFile_;
     if (metaDataTree->FindBranch(poolNames::indexIntoFileBranchName().c_str()) != nullptr) {
       metaDataTree->SetBranchAddress(poolNames::indexIntoFileBranchName().c_str(), &iifPtr);
     }
 
     storedProcessBlockHelper_ = std::make_unique<StoredProcessBlockHelper>();
     StoredProcessBlockHelper& storedProcessBlockHelper = *storedProcessBlockHelper_;
     StoredProcessBlockHelper* pStoredProcessBlockHelper = storedProcessBlockHelper_.get();
     if (inputType == InputType::Primary) {
       if (metaDataTree->FindBranch(poolNames::processBlockHelperBranchName().c_str()) != nullptr) {
         metaDataTree->SetBranchAddress(poolNames::processBlockHelperBranchName().c_str(), &pStoredProcessBlockHelper);
       }
     }
 
     StoredMergeableRunProductMetadata* smrc = nullptr;
     if (inputType == InputType::Primary) {
       smrc = &*storedMergeableRunProductMetadata_;
       if (metaDataTree->FindBranch(poolNames::mergeableRunProductMetadataBranchName().c_str()) != nullptr) {
         metaDataTree->SetBranchAddress(poolNames::mergeableRunProductMetadataBranchName().c_str(), &smrc);
       }
     }
 
     // Need to read to a temporary registry so we can do a translation of the BranchKeys.
     // This preserves backward compatibility against friendly class name algorithm changes.
     ProductRegistry inputProdDescReg;
     ProductRegistry* ppReg = &inputProdDescReg;
     metaDataTree->SetBranchAddress(poolNames::productDescriptionBranchName().c_str(), (&ppReg));
 
     using PsetMap = std::map<ParameterSetID, ParameterSetBlob>;
     PsetMap psetMap;
     PsetMap* psetMapPtr = &psetMap;
     if (metaDataTree->FindBranch(poolNames::parameterSetMapBranchName().c_str()) != nullptr) {
       //backward compatibility
       assert(!fileFormatVersion().parameterSetsTree());
       metaDataTree->SetBranchAddress(poolNames::parameterSetMapBranchName().c_str(), &psetMapPtr);
     } else {
       assert(fileFormatVersion().parameterSetsTree());
       // We use a smart pointer so the tree will be deleted after use, and not kept for the life of the file.
       std::unique_ptr<TTree> psetTree(dynamic_cast<TTree*>(filePtr_->Get(poolNames::parameterSetsTreeName().c_str())));
       if (nullptr == psetTree.get()) {
         throw Exception(errors::FileReadError)
             << "Could not find tree " << poolNames::parameterSetsTreeName() << " in the input file.\n";
       }
 
       using IdToBlobs = std::pair<ParameterSetID, ParameterSetBlob>;
       IdToBlobs idToBlob;
       IdToBlobs* pIdToBlob = &idToBlob;
       psetTree->SetBranchAddress(poolNames::idToParameterSetBlobsBranchName().c_str(), &pIdToBlob);
 
       std::unique_ptr<TTreeCache> psetTreeCache =
           roottree::trainCache(psetTree.get(), *filePtr_, roottree::defaultNonEventCacheSize, "*");
       psetTreeCache->SetEnablePrefetching(false);
       auto guard = filePtr_->setCacheReadTemporarily(psetTreeCache.get(), psetTree.get());
       for (Long64_t i = 0; i != psetTree->GetEntries(); ++i) {
         psetTree->GetEntry(i);
         psetMap.insert(idToBlob);
       }
     }
 
     // backward compatibility
     ProcessHistoryRegistry::collection_type pHistMap;
     ProcessHistoryRegistry::collection_type* pHistMapPtr = &pHistMap;
     if (metaDataTree->FindBranch(poolNames::processHistoryMapBranchName().c_str()) != nullptr) {
       metaDataTree->SetBranchAddress(poolNames::processHistoryMapBranchName().c_str(), &pHistMapPtr);
     }
 
     ProcessHistoryRegistry::vector_type pHistVector;
     ProcessHistoryRegistry::vector_type* pHistVectorPtr = &pHistVector;
     if (metaDataTree->FindBranch(poolNames::processHistoryBranchName().c_str()) != nullptr) {
       metaDataTree->SetBranchAddress(poolNames::processHistoryBranchName().c_str(), &pHistVectorPtr);
     }
 
     // backward compatibility
     ProcessConfigurationVector processConfigurations;
     ProcessConfigurationVector* procConfigVectorPtr = &processConfigurations;
     if (metaDataTree->FindBranch(poolNames::processConfigurationBranchName().c_str()) != nullptr) {
       metaDataTree->SetBranchAddress(poolNames::processConfigurationBranchName().c_str(), &procConfigVectorPtr);
     }
 
     auto branchIDListsAPtr = std::make_unique<BranchIDLists>();
     BranchIDLists* branchIDListsPtr = branchIDListsAPtr.get();
     if (metaDataTree->FindBranch(poolNames::branchIDListBranchName().c_str()) != nullptr) {
       metaDataTree->SetBranchAddress(poolNames::branchIDListBranchName().c_str(), &branchIDListsPtr);
     }
 
     ThinnedAssociationsHelper* thinnedAssociationsHelperPtr;  // must remain in scope through getEntry()
     if (inputType != InputType::SecondarySource) {
       fileThinnedAssociationsHelper_ =
           std::make_unique<ThinnedAssociationsHelper>();  // propagate_const<T> has no reset() function
       thinnedAssociationsHelperPtr = fileThinnedAssociationsHelper_.get();
       if (metaDataTree->FindBranch(poolNames::thinnedAssociationsHelperBranchName().c_str()) != nullptr) {
         metaDataTree->SetBranchAddress(poolNames::thinnedAssociationsHelperBranchName().c_str(),
                                        &thinnedAssociationsHelperPtr);
       }
     }
 
     ProductDependencies* productDependenciesBuffer = productDependencies_.get();
     if (metaDataTree->FindBranch(poolNames::productDependenciesBranchName().c_str()) != nullptr) {
       metaDataTree->SetBranchAddress(poolNames::productDependenciesBranchName().c_str(), &productDependenciesBuffer);
     }
 
     // backward compatibility
     std::vector<EventProcessHistoryID>* eventHistoryIDsPtr = &eventProcessHistoryIDs_;
     if (metaDataTree->FindBranch(poolNames::eventHistoryBranchName().c_str()) != nullptr) {
       metaDataTree->SetBranchAddress(poolNames::eventHistoryBranchName().c_str(), &eventHistoryIDsPtr);
     }
 
     if (metaDataTree->FindBranch(poolNames::moduleDescriptionMapBranchName().c_str()) != nullptr) {
       if (metaDataTree->GetBranch(poolNames::moduleDescriptionMapBranchName().c_str())->GetSplitLevel() != 0) {
         metaDataTree->SetBranchStatus((poolNames::moduleDescriptionMapBranchName() + ".*").c_str(), false);
       } else {
         metaDataTree->SetBranchStatus(poolNames::moduleDescriptionMapBranchName().c_str(), false);
       }
     }
 
     // Here we read the metadata tree
     roottree::getEntry(metaDataTree.get(), 0);
 
     eventProcessHistoryIter_ = eventProcessHistoryIDs_.begin();
 
     // Here we read the event history tree, if we have one.
     readEventHistoryTree();
 
     ParameterSetConverter::ParameterSetIdConverter psetIdConverter;
     if (!fileFormatVersion().triggerPathsTracked()) {
       ParameterSetConverter converter(psetMap, psetIdConverter, fileFormatVersion().parameterSetsByReference());
     } else {
       // Merge into the parameter set registry.
       pset::Registry& psetRegistry = *pset::Registry::instance();
       try {
         for (auto const& psetEntry : psetMap) {
           ParameterSet pset(psetEntry.second.pset());
           pset.setID(psetEntry.first);
           // For thread safety, don't update global registries when a secondary source opens a file.
           if (inputType != InputType::SecondarySource) {
             psetRegistry.insertMapped(pset);
           }
         }
       } catch (edm::Exception const& iExcept) {
         if (iExcept.categoryCode() == edm::errors::Configuration) {
           edm::Exception exception(edm::errors::FormatIncompatibility);
           exception << iExcept.message();
           exception.addContext("Creating ParameterSets from file");
           throw exception;
         } else {
           throw;
         }
       }
     }
     std::shared_ptr<BranchIDLists> mutableBranchIDLists;
     if (!fileFormatVersion().splitProductIDs()) {
       // Old provenance format input file.  Create a provenance adaptor.
       // propagate_const<T> has no reset() function
       provenanceAdaptor_ = std::make_unique<ProvenanceAdaptor>(
           inputProdDescReg, pHistMap, pHistVector, processConfigurations, psetIdConverter, true);
       // Fill in the branchIDLists branch from the provenance adaptor
       mutableBranchIDLists = provenanceAdaptor_->releaseBranchIDLists();
     } else {
       if (!fileFormatVersion().triggerPathsTracked()) {
         // New provenance format, but change in ParameterSet Format. Create a provenance adaptor.
         // propagate_const<T> has no reset() function
         provenanceAdaptor_ = std::make_unique<ProvenanceAdaptor>(
             inputProdDescReg, pHistMap, pHistVector, processConfigurations, psetIdConverter, false);
       }
       // New provenance format input file. The branchIDLists branch was read directly from the input file.
       if (metaDataTree->FindBranch(poolNames::branchIDListBranchName().c_str()) == nullptr) {
         throw Exception(errors::EventCorruption) << "Failed to find branchIDLists branch in metaData tree.\n";
       }
       mutableBranchIDLists.reset(branchIDListsAPtr.release());
     }
 
     if (fileFormatVersion().hasThinnedAssociations()) {
       if (metaDataTree->FindBranch(poolNames::thinnedAssociationsHelperBranchName().c_str()) == nullptr) {
         throw Exception(errors::EventCorruption)
             << "Failed to find thinnedAssociationsHelper branch in metaData tree.\n";
       }
     }
 
     if (!fileOptions.bypassVersionCheck) {
       checkReleaseVersion(pHistVector, file());
     }
 
     if (productChoices.labelRawDataLikeMC) {
       std::string const rawData("FEDRawDataCollection");
       std::string const source("source");
       ProductRegistry::ProductList& pList = inputProdDescReg.productListUpdator();
       BranchKey finder(rawData, source, "", "");
       ProductRegistry::ProductList::iterator it = pList.lower_bound(finder);
       if (it != pList.end() && it->first.friendlyClassName() == rawData && it->first.moduleLabel() == source) {
         // We found raw data with a module label of source.
         // We need to change the module label and process name.
         // Create helper.
         it->second.init();
         // propagate_const<T> has no reset() function
         daqProvenanceHelper_ = std::make_unique<DaqProvenanceHelper>(it->second.unwrappedTypeID());
         // Create the new branch description
         ProductDescription const& newBD = daqProvenanceHelper_->productDescription();
         // Save info from the old and new branch descriptions
         daqProvenanceHelper_->saveInfo(it->second, newBD);
         // Map the new branch name to the old branch name.
         newBranchToOldBranch_.insert(std::make_pair(newBD.branchName(), it->second.branchName()));
         // Remove the old branch description from the product Registry.
         pList.erase(it);
         // Check that there was only one.
         it = pList.lower_bound(finder);
         assert(!(it != pList.end() && it->first.friendlyClassName() == rawData && it->first.moduleLabel() == source));
         // Insert the new branch description into the product registry.
         inputProdDescReg.copyProduct(newBD);
         // Fix up other per file metadata.
         daqProvenanceHelper_->fixMetaData(processConfigurations, pHistVector);
         daqProvenanceHelper_->fixMetaData(*mutableBranchIDLists);
         daqProvenanceHelper_->fixMetaData(*productDependencies_);
       }
       branchIDLists_ = std::move(mutableBranchIDLists);
     }
 
     for (auto const& history : pHistVector) {
       processHistoryRegistry.registerProcessHistory(history);
     }
 
     eventTree_.trainCache(BranchTypeToAuxiliaryBranchName(InEvent).c_str());
 
     // Update the branch id info. This has to be done before validateFile since
     // depending on the file format, the branchIDListHelper_ may have its fixBranchListIndexes call made
     if (inputType == InputType::Primary) {
       branchListIndexesUnchanged_ = branchIDListHelper_->updateFromInput(*branchIDLists_);
     }
 
     validateFile(inputType, processingOptions.usingGoToEvent, orderedProcessHistoryIDs);
 
     // Here, we make the class that will make the ProvenanceReader
     // It reads whatever trees it needs.
     // propagate_const<T> has no reset() function
     provenanceReaderMaker_ = std::unique_ptr<MakeProvenanceReader>(makeProvenanceReaderMaker(inputType).release());
 
     // Merge into the hashed registries.
     if (eventSkipperByID_ && eventSkipperByID_->somethingToSkip()) {
       whyNotFastClonable_ += FileBlock::EventsOrLumisSelectedByID;
     }
 
     initializeDuplicateChecker(crossFileInfo.indexesIntoFiles, crossFileInfo.currentIndexIntoFile);
     indexIntoFileIter_ = indexIntoFileBegin_ = indexIntoFile_.begin(
         processingOptions.noRunLumiSort
             ? IndexIntoFile::entryOrder
             : (processingOptions.noEventSort ? IndexIntoFile::firstAppearanceOrder : IndexIntoFile::numericalOrder));
     indexIntoFileEnd_ = indexIntoFile_.end(
         processingOptions.noRunLumiSort
             ? IndexIntoFile::entryOrder
             : (processingOptions.noEventSort ? IndexIntoFile::firstAppearanceOrder : IndexIntoFile::numericalOrder));
     runHelper_->setForcedRunOffset(indexIntoFileBegin_ == indexIntoFileEnd_ ? 1 : indexIntoFileBegin_.run());
     eventProcessHistoryIter_ = eventProcessHistoryIDs_.begin();
 
     makeProcessBlockRootTrees(fileOptions.filePtr, ttreeOptions, inputType, storedProcessBlockHelper);
 
     setPresenceInProductRegistry(inputProdDescReg, storedProcessBlockHelper);
 
     auto newReg = std::make_unique<ProductRegistry>();
 
     // Do the translation from the old registry to the new one
     {
       ProductRegistry::ProductList const& prodList = inputProdDescReg.productList();
       for (auto const& product : prodList) {
         ProductDescription const& prod = product.second;
         std::string newFriendlyName = friendlyname::friendlyName(prod.className());
         if (newFriendlyName == prod.friendlyClassName()) {
           newReg->copyProduct(prod);
         } else {
           if (fileFormatVersion().splitProductIDs()) {
             throw Exception(errors::UnimplementedFeature)
                 << "Cannot change friendly class name algorithm without more development work\n"
                 << "to update BranchIDLists and ThinnedAssociationsHelper.  Contact the framework group.\n";
           }
           ProductDescription newBD(prod);
           newBD.updateFriendlyClassName();
           newReg->copyProduct(newBD);
           newBranchToOldBranch_.insert(std::make_pair(newBD.branchName(), prod.branchName()));
         }
       }
 
       dropOnInputAndReorder(*newReg,
                             productChoices.productSelectorRules,
                             productChoices.dropDescendantsOfDroppedProducts,
                             inputType,
                             storedProcessBlockHelper,
                             crossFileInfo.processBlockHelper);
 
       if (inputType == InputType::SecondaryFile) {
         crossFileInfo.thinnedAssociationsHelper->updateFromSecondaryInput(*fileThinnedAssociationsHelper_,
                                                                           *productChoices.associationsFromSecondary);
       } else if (inputType == InputType::Primary) {
         crossFileInfo.processBlockHelper->initializeFromPrimaryInput(storedProcessBlockHelper);
         crossFileInfo.thinnedAssociationsHelper->updateFromPrimaryInput(*fileThinnedAssociationsHelper_);
       }
 
       if (inputType == InputType::Primary) {
         for (auto& product : newReg->productListUpdator()) {
           setIsMergeable(product.second);
         }
       }
       //inform system we want to use DelayedReader
       for (auto& product : newReg->productListUpdator()) {
         product.second.setOnDemand(true);
       }
 
       for (auto& processBlockTree : processBlockTrees_) {
         treePointers_.push_back(processBlockTree.get());
       }
 
       // freeze the product registry
       newReg->setFrozen(inputType != InputType::Primary);
       productRegistry_.reset(newReg.release());
     }
 
     // Set up information from the product registry.
     ProductRegistry::ProductList const& prodList = productRegistry()->productList();
 
     {
       std::vector<size_t> nBranches(treePointers_.size(), 0);
       for (auto const& product : prodList) {
         if (product.second.branchType() == InProcess) {
           std::vector<std::string> const& processes = storedProcessBlockHelper.processesWithProcessBlockProducts();
           auto it = std::find(processes.begin(), processes.end(), product.second.processName());
           if (it != processes.end()) {
             auto index = std::distance(processes.begin(), it);
             ++nBranches[numberOfRunLumiEventProductTrees + index];
           }
         } else {
           ++nBranches[product.second.branchType()];
         }
       }
 
       int i = 0;
       for (auto& t : treePointers_) {
         t->numberOfBranchesToAdd(nBranches[i]);
         ++i;
       }
     }
     for (auto const& product : prodList) {
       ProductDescription const& prod = product.second;
       if (prod.branchType() == InProcess) {
         std::vector<std::string> const& processes = storedProcessBlockHelper.processesWithProcessBlockProducts();
         auto it = std::find(processes.begin(), processes.end(), prod.processName());
         if (it != processes.end()) {
           auto index = std::distance(processes.begin(), it);
           treePointers_[numberOfRunLumiEventProductTrees + index]->addBranch(prod,
                                                                              newBranchToOldBranch(prod.branchName()));
         }
       } else {
         treePointers_[prod.branchType()]->addBranch(prod, newBranchToOldBranch(prod.branchName()));
       }
     }
 
     // Determine if this file is fast clonable.
     setIfFastClonable(processingOptions.remainingEvents, processingOptions.remainingLumis);
 
     // We are done with our initial reading of EventAuxiliary.
     indexIntoFile_.doneFileInitialization();
 
     // Tell the event tree to begin training at the next read.
     eventTree_.resetTraining();
 
     // Train the run and lumi trees.
     runTree_.trainCache("*");
     lumiTree_.trainCache("*");
     for (auto& processBlockTree : processBlockTrees_) {
       processBlockTree->trainCache("*");
     }
   }
 
   RootFile::~RootFile() {}
 
   void RootFile::readEntryDescriptionTree(EntryDescriptionMap& entryDescriptionMap, InputType inputType) {
     // Called only for old format files.
     // We use a smart pointer so the tree will be deleted after use, and not kept for the life of the file.
     std::unique_ptr<TTree> entryDescriptionTree(
         dynamic_cast<TTree*>(filePtr_->Get(poolNames::entryDescriptionTreeName().c_str())));
     if (nullptr == entryDescriptionTree.get()) {
       throw Exception(errors::FileReadError)
           << "Could not find tree " << poolNames::entryDescriptionTreeName() << " in the input file.\n";
     }
 
     EntryDescriptionID idBuffer;
     EntryDescriptionID* pidBuffer = &idBuffer;
     entryDescriptionTree->SetBranchAddress(poolNames::entryDescriptionIDBranchName().c_str(), &pidBuffer);
 
     EventEntryDescription entryDescriptionBuffer;
     EventEntryDescription* pEntryDescriptionBuffer = &entryDescriptionBuffer;
     entryDescriptionTree->SetBranchAddress(poolNames::entryDescriptionBranchName().c_str(), &pEntryDescriptionBuffer);
 
     // Fill in the parentage registry.
     ParentageRegistry& registry = *ParentageRegistry::instance();
 
     for (Long64_t i = 0, numEntries = entryDescriptionTree->GetEntries(); i < numEntries; ++i) {
       roottree::getEntry(entryDescriptionTree.get(), i);
       if (idBuffer != entryDescriptionBuffer.id()) {
         throw Exception(errors::EventCorruption) << "Corruption of EntryDescription tree detected.\n";
       }
       entryDescriptionMap.insert(std::make_pair(entryDescriptionBuffer.id(), entryDescriptionBuffer));
       Parentage parents;
       parents.setParents(entryDescriptionBuffer.parents());
       if (daqProvenanceHelper_) {
         ParentageID const oldID = parents.id();
         daqProvenanceHelper_->fixMetaData(parents.parentsForUpdate());
         ParentageID newID = parents.id();
         if (newID != oldID) {
           daqProvenanceHelper_->setOldParentageIDToNew(oldID, newID);
         }
       }
       // For thread safety, don't update global registries when a secondary source opens a file.
       if (inputType != InputType::SecondarySource) {
         registry.insertMapped(parents);
       }
     }
     entryDescriptionTree->SetBranchAddress(poolNames::entryDescriptionIDBranchName().c_str(), nullptr);
     entryDescriptionTree->SetBranchAddress(poolNames::entryDescriptionBranchName().c_str(), nullptr);
   }
 
   void RootFile::readParentageTree(InputType inputType) {
     // New format file
     // We use a smart pointer so the tree will be deleted after use, and not kept for the life of the file.
     std::unique_ptr<TTree> parentageTree(dynamic_cast<TTree*>(filePtr_->Get(poolNames::parentageTreeName().c_str())));
     if (nullptr == parentageTree.get()) {
       throw Exception(errors::FileReadError)
           << "Could not find tree " << poolNames::parentageTreeName() << " in the input file.\n";
     }
 
     Parentage parents;
     Parentage* pParentageBuffer = &parents;
     parentageTree->SetBranchAddress(poolNames::parentageBranchName().c_str(), &pParentageBuffer);
 
     ParentageRegistry& registry = *ParentageRegistry::instance();
 
     parentageIDLookup_.reserve(parentageTree->GetEntries());
     for (Long64_t i = 0, numEntries = parentageTree->GetEntries(); i < numEntries; ++i) {
       roottree::getEntry(parentageTree.get(), i);
       if (daqProvenanceHelper_) {
         ParentageID const oldID = parents.id();
         daqProvenanceHelper_->fixMetaData(parents.parentsForUpdate());
         ParentageID newID = parents.id();
         if (newID != oldID) {
           daqProvenanceHelper_->setOldParentageIDToNew(oldID, newID);
         }
       }
       // For thread safety, don't update global registries when a secondary source opens a file.
       if (inputType != InputType::SecondarySource) {
         registry.insertMapped(parents);
       }
       parentageIDLookup_.push_back(parents.id());
     }
     parentageTree->SetBranchAddress(poolNames::parentageBranchName().c_str(), nullptr);
   }
 
   void RootFile::setIfFastClonable(int remainingEvents, int remainingLumis) {
     if (fileFormatVersion().noMetaDataTrees() and !fileFormatVersion().storedProductProvenanceUsed()) {
       //we must avoid copying the old branch which stored the per product per event provenance
       whyNotFastClonable_ += FileBlock::FileTooOld;
       return;
     }
     if (!fileFormatVersion().splitProductIDs()) {
       whyNotFastClonable_ += FileBlock::FileTooOld;
       return;
     }
     if (processingMode_ != InputSource::RunsLumisAndEvents) {
       whyNotFastClonable_ += FileBlock::NotProcessingEvents;
       return;
     }
     // Find entry for first event in file
     IndexIntoFile::IndexIntoFileItr it = indexIntoFileBegin_;
     while (it != indexIntoFileEnd_ && it.getEntryType() != IndexIntoFile::kEvent) {
       ++it;
     }
     if (it == indexIntoFileEnd_) {
       whyNotFastClonable_ += FileBlock::NoEventsInFile;
       return;
     }
 
     // From here on, record all reasons we can't fast clone.
     IndexIntoFile::SortOrder sortOrder =
         (noRunLumiSort_ ? IndexIntoFile::entryOrder
                         : (noEventSort_ ? IndexIntoFile::firstAppearanceOrder : IndexIntoFile::numericalOrder));
     if (!indexIntoFile_.iterationWillBeInEntryOrder(sortOrder)) {
       whyNotFastClonable_ += (noEventSort_ ? FileBlock::RunOrLumiNotContiguous : FileBlock::EventsToBeSorted);
     }
     if (skipAnyEvents_) {
       whyNotFastClonable_ += FileBlock::InitialEventsSkipped;
     }
     if (remainingEvents >= 0 && eventTree_.entries() > remainingEvents) {
       whyNotFastClonable_ += FileBlock::MaxEventsTooSmall;
     }
     if (remainingLumis >= 0 && lumiTree_.entries() > remainingLumis) {
       whyNotFastClonable_ += FileBlock::MaxLumisTooSmall;
     }
     if (duplicateChecker_ && !duplicateChecker_->checkDisabled() && !duplicateChecker_->noDuplicatesInFile()) {
       whyNotFastClonable_ += FileBlock::DuplicateEventsRemoved;
     }
   }
 
   std::shared_ptr<FileBlock> RootFile::createFileBlock() {
     std::vector<TTree*> processBlockTrees;
     std::vector<std::string> processesWithProcessBlockTrees;
     processBlockTrees.reserve(processBlockTrees_.size());
     processesWithProcessBlockTrees.reserve(processBlockTrees_.size());
     for (auto& processBlockTree : processBlockTrees_) {
       processBlockTrees.push_back(processBlockTree->tree());
       processesWithProcessBlockTrees.push_back(processBlockTree->processName());
     }
     return std::make_shared<FileBlock>(fileFormatVersion(),
                                        eventTree_.tree(),
                                        eventTree_.metaTree(),
                                        lumiTree_.tree(),
                                        lumiTree_.metaTree(),
                                        runTree_.tree(),
                                        runTree_.metaTree(),
                                        std::move(processBlockTrees),
                                        std::move(processesWithProcessBlockTrees),
                                        whyNotFastClonable(),
                                        hasNewlyDroppedBranch(),
                                        file_,
                                        branchListIndexesUnchanged(),
                                        modifiedIDs(),
                                        productDependencies());
   }
 
   void RootFile::updateFileBlock(FileBlock& fileBlock) {
     std::vector<TTree*> processBlockTrees;
     std::vector<std::string> processesWithProcessBlockTrees;
     processBlockTrees.reserve(processBlockTrees_.size());
     processesWithProcessBlockTrees.reserve(processBlockTrees_.size());
     for (auto& processBlockTree : processBlockTrees_) {
       processBlockTrees.push_back(processBlockTree->tree());
       processesWithProcessBlockTrees.push_back(processBlockTree->processName());
     }
     fileBlock.updateTTreePointers(eventTree_.tree(),
                                   eventTree_.metaTree(),
                                   lumiTree_.tree(),
                                   lumiTree_.metaTree(),
                                   runTree_.tree(),
                                   runTree_.metaTree(),
                                   std::move(processBlockTrees),
                                   std::move(processesWithProcessBlockTrees));
   }
 
   std::string const& RootFile::newBranchToOldBranch(std::string const& newBranch) const {
     std::map<std::string, std::string>::const_iterator it = newBranchToOldBranch_.find(newBranch);
     if (it != newBranchToOldBranch_.end()) {
       return it->second;
     }
     return newBranch;
   }
 
   IndexIntoFile::IndexIntoFileItr RootFile::indexIntoFileIter() const { return indexIntoFileIter_; }
 
   void RootFile::setPosition(IndexIntoFile::IndexIntoFileItr const& position) {
     indexIntoFileIter_.copyPosition(position);
   }
 
   void RootFile::initAssociationsFromSecondary(std::vector<BranchID> const& associationsFromSecondary) {
     thinnedAssociationsHelper_->initAssociationsFromSecondary(associationsFromSecondary,
                                                               *fileThinnedAssociationsHelper_);
   }
 
   bool RootFile::skipThisEntry() {
     if (indexIntoFileIter_ == indexIntoFileEnd_) {
       return false;
     }
 
     if (eventSkipperByID_ && eventSkipperByID_->somethingToSkip()) {
       // See first if the entire lumi or run is skipped, so we won't have to read the event Auxiliary in that case.
       if (eventSkipperByID_->skipIt(indexIntoFileIter_.run(), indexIntoFileIter_.lumi(), 0U)) {
         return true;
       }
 
       // The Lumi is not skipped.  If this is an event, see if the event is skipped.
       if (indexIntoFileIter_.getEntryType() == IndexIntoFile::kEvent) {
         auto eventAux = fillEventAuxiliary(indexIntoFileIter_.entry());
         if (eventSkipperByID_->skipIt(indexIntoFileIter_.run(), indexIntoFileIter_.lumi(), eventAux.id().event())) {
           return true;
         }
       }
 
       // Skip runs with no lumis if either lumisToSkip or lumisToProcess have been set to select lumis
       if (indexIntoFileIter_.getEntryType() == IndexIntoFile::kRun && eventSkipperByID_->skippingLumis()) {
         // There are no lumis in this run, not even ones we will skip
         if (indexIntoFileIter_.peekAheadAtLumi() == IndexIntoFile::invalidLumi) {
           return true;
         }
         // If we get here there are lumis in the run, check to see if we are skipping all of them
         do {
           if (!eventSkipperByID_->skipIt(indexIntoFileIter_.run(), indexIntoFileIter_.peekAheadAtLumi(), 0U)) {
             return false;
           }
         } while (indexIntoFileIter_.skipLumiInRun());
         return true;
       }
     }
     return false;
   }
 
   bool RootFile::isDuplicateEvent() {
     assert(indexIntoFileIter_.getEntryType() == IndexIntoFile::kEvent);
     if (duplicateChecker_.get() == nullptr) {
       return false;
     }
     auto const eventAux = fillEventAuxiliary(indexIntoFileIter_.entry());
     return duplicateChecker_->isDuplicateAndCheckActive(indexIntoFileIter_.processHistoryIDIndex(),
                                                         indexIntoFileIter_.run(),
                                                         indexIntoFileIter_.lumi(),
                                                         eventAux.id().event(),
                                                         file_);
   }
 
   bool RootFile::containsItem(RunNumber_t run, LuminosityBlockNumber_t lumi, EventNumber_t event) const {
     return indexIntoFile_.containsItem(run, lumi, event);
   }
 
   IndexIntoFile::EntryType RootFile::getNextItemType(RunNumber_t& run,
                                                      LuminosityBlockNumber_t& lumi,
                                                      EventNumber_t& event) {
     // First, account for consecutive skipped entries.
     while (skipThisEntry()) {
       if (indexIntoFileIter_.getEntryType() == IndexIntoFile::kRun) {
         indexIntoFileIter_.advanceToNextRun();
       } else if (indexIntoFileIter_.getEntryType() == IndexIntoFile::kLumi) {
         indexIntoFileIter_.advanceToNextLumiOrRun();
       } else {
         ++indexIntoFileIter_;
       }
     }
     // OK, we have an entry that is not skipped.
     IndexIntoFile::EntryType entryType = indexIntoFileIter_.getEntryType();
     if (entryType == IndexIntoFile::kEnd) {
       return IndexIntoFile::kEnd;
     }
     if (entryType == IndexIntoFile::kRun) {
       run = indexIntoFileIter_.run();
       runHelper_->checkForNewRun(run, indexIntoFileIter_.peekAheadAtLumi());
       return IndexIntoFile::kRun;
     } else if (processingMode_ == InputSource::Runs) {
       indexIntoFileIter_.advanceToNextRun();
       return getNextItemType(run, lumi, event);
     }
     if (entryType == IndexIntoFile::kLumi) {
       run = indexIntoFileIter_.run();
       lumi = indexIntoFileIter_.lumi();
       return IndexIntoFile::kLumi;
     } else if (processingMode_ == InputSource::RunsAndLumis) {
       indexIntoFileIter_.advanceToNextLumiOrRun();
       return getNextItemType(run, lumi, event);
     }
     if (isDuplicateEvent()) {
       ++indexIntoFileIter_;
       return getNextItemType(run, lumi, event);
     }
     run = indexIntoFileIter_.run();
     lumi = indexIntoFileIter_.lumi();
     auto eventAux = fillEventAuxiliary(indexIntoFileIter_.entry());
     event = eventAux.event();
     return IndexIntoFile::kEvent;
   }
 
   bool RootFile::wasLastEventJustRead() const {
     IndexIntoFile::IndexIntoFileItr itr(indexIntoFileIter_);
     itr.advanceToEvent();
     return itr.getEntryType() == IndexIntoFile::kEnd;
   }
 
   bool RootFile::wasFirstEventJustRead() const {
     IndexIntoFile::IndexIntoFileItr itr(indexIntoFileIter_);
     int phIndex;
     RunNumber_t run;
     LuminosityBlockNumber_t lumi;
     IndexIntoFile::EntryNumber_t eventEntry;
     itr.skipEventBackward(phIndex, run, lumi, eventEntry);
     itr.skipEventBackward(phIndex, run, lumi, eventEntry);
     return eventEntry == IndexIntoFile::invalidEntry;
   }
 
   namespace {
     struct RunItem {
       RunItem(ProcessHistoryID const& phid, RunNumber_t const& run) : phid_(phid), run_(run) {}
       ProcessHistoryID phid_;
       RunNumber_t run_;
     };
     struct RunItemSortByRun {
       bool operator()(RunItem const& a, RunItem const& b) const { return a.run_ < b.run_; }
     };
     struct RunItemSortByRunPhid {
       bool operator()(RunItem const& a, RunItem const& b) const {
         return a.run_ < b.run_ || (!(b.run_ < a.run_) && a.phid_ < b.phid_);
       }
     };
     struct LumiItem {
       LumiItem(ProcessHistoryID const& phid,
                RunNumber_t const& run,
                LuminosityBlockNumber_t const& lumi,
                IndexIntoFile::EntryNumber_t const& entry)
           : phid_(phid),
             run_(run),
             lumi_(lumi),
             firstEventEntry_(entry),
             lastEventEntry_(entry == IndexIntoFile::invalidEntry ? IndexIntoFile::invalidEntry : entry + 1) {}
       ProcessHistoryID phid_;
       RunNumber_t run_;
       LuminosityBlockNumber_t lumi_;
       IndexIntoFile::EntryNumber_t firstEventEntry_;
       IndexIntoFile::EntryNumber_t lastEventEntry_;
     };
     struct LumiItemSortByRunLumi {
       bool operator()(LumiItem const& a, LumiItem const& b) const {
         return a.run_ < b.run_ || (!(b.run_ < a.run_) && a.lumi_ < b.lumi_);
       }
     };
     struct LumiItemSortByRunLumiPhid {
       bool operator()(LumiItem const& a, LumiItem const& b) const {
         if (a.run_ < b.run_)
           return true;
         if (b.run_ < a.run_)
           return false;
         if (a.lumi_ < b.lumi_)
           return true;
         if (b.lumi_ < a.lumi_)
           return false;
         return a.phid_ < b.phid_;
       }
     };
   }  // namespace
 
   void RootFile::fillIndexIntoFile() {
     // This function is for backward compatibility.
     // If reading a current format file, indexIntoFile_ is read from the input
     // file and should always be there. Note that the algorithm below will work
     // sometimes but often fail with the new format introduced in release 3_8_0.
     // If it ever becomes necessary to rebuild IndexIntoFile from the new format,
     // probably a separate function should be written to deal with the task.
     // This is possible just not implemented yet.
     assert(!fileFormatVersion().hasIndexIntoFile());
 
     typedef std::list<LumiItem> LumiList;
     LumiList lumis;  // (declare 1)
 
     typedef std::set<LuminosityBlockID> RunLumiSet;
     RunLumiSet runLumiSet;  // (declare 2)
 
     typedef std::list<RunItem> RunList;
     RunList runs;  // (declare 5)
 
     typedef std::set<RunNumber_t> RunSet;
     RunSet runSet;  // (declare 4)
 
     typedef std::set<RunItem, RunItemSortByRunPhid> RunItemSet;
     RunItemSet runItemSet;  // (declare 3)
 
     typedef std::map<RunNumber_t, ProcessHistoryID> PHIDMap;
     PHIDMap phidMap;
 
     RunNumber_t prevRun = 0;
     LuminosityBlockNumber_t prevLumi = 0;
     ProcessHistoryID prevPhid;
     bool iFirst = true;
 
     indexIntoFile_.unsortedEventNumbers().clear();  // should already be empty, just being careful
     indexIntoFile_.unsortedEventNumbers().reserve(eventTree_.entries());
 
     // First, loop through the event tree.
     EventSelectionIDVector eventSelectionIDs;
     BranchListIndexes branchListIndexes;
     while (eventTree_.next()) {
       bool newRun = false;
       bool newLumi = false;
       auto evtAux = fillThisEventAuxiliary();
       fillEventHistory(evtAux, eventSelectionIDs, branchListIndexes);
 
       // Save the event numbers as we loop through the event auxiliary to avoid
       // having to read through the event auxiliary again later. These event numbers
       // are not actually used in this function, but could be needed elsewhere.
       indexIntoFile_.unsortedEventNumbers().push_back(evtAux.event());
 
       ProcessHistoryID reducedPHID = processHistoryRegistry_->reducedProcessHistoryID(evtAux.processHistoryID());
 
       if (iFirst || prevPhid != reducedPHID || prevRun != evtAux.run()) {
         iFirst = false;
         newRun = newLumi = true;
       } else if (prevLumi != evtAux.luminosityBlock()) {
         newLumi = true;
       }
       prevPhid = reducedPHID;
       prevRun = evtAux.run();
       prevLumi = evtAux.luminosityBlock();
       if (newLumi) {
         lumis.emplace_back(
             reducedPHID, evtAux.run(), evtAux.luminosityBlock(), eventTree_.entryNumber());  // (insert 1)
         runLumiSet.insert(LuminosityBlockID(evtAux.run(), evtAux.luminosityBlock()));        // (insert 2)
       } else {
         LumiItem& currentLumi = lumis.back();
         assert(currentLumi.lastEventEntry_ == eventTree_.entryNumber());
         ++currentLumi.lastEventEntry_;
       }
       if (newRun) {
         // Insert run in list if it is not already there.
         RunItem item(reducedPHID, evtAux.run());
         if (runItemSet.insert(item).second) {  // (check 3, insert 3)
           runs.push_back(std::move(item));     // (insert 5)
           runSet.insert(evtAux.run());         // (insert 4)
           phidMap.insert(std::make_pair(evtAux.run(), reducedPHID));
         }
       }
     }
     // now clean up.
     eventTree_.setEntryNumber(IndexIntoFile::invalidEntry);
     lastEventEntryNumberRead_ = IndexIntoFile::invalidEntry;
 
     // Loop over run entries and fill information.
 
     typedef std::map<RunNumber_t, IndexIntoFile::EntryNumber_t> RunMap;
     RunMap runMap;  // (declare 11)
 
     typedef std::vector<RunItem> RunVector;
     RunVector emptyRuns;  // (declare 12)
 
     if (runTree_.isValid()) {
       while (runTree_.next()) {
         // Note: adjacent duplicates will be skipped without an explicit check.
 
         std::shared_ptr<RunAuxiliary> runAux = fillRunAuxiliary();
         ProcessHistoryID reducedPHID = processHistoryRegistry_->reducedProcessHistoryID(runAux->processHistoryID());
 
         if (runSet.insert(runAux->run()).second) {  // (check 4, insert 4)
           // This run was not associated with any events.
           emptyRuns.emplace_back(reducedPHID, runAux->run());  // (insert 12)
         }
         runMap.insert(std::make_pair(runAux->run(), runTree_.entryNumber()));  // (insert 11)
         phidMap.insert(std::make_pair(runAux->run(), reducedPHID));
       }
       // now clean up.
       runTree_.setEntryNumber(IndexIntoFile::invalidEntry);
     }
 
     // Insert the ordered empty runs into the run list.
     RunItemSortByRun runItemSortByRun;
     stable_sort_all(emptyRuns, runItemSortByRun);
 
     RunList::iterator itRuns = runs.begin(), endRuns = runs.end();
     for (auto const& emptyRun : emptyRuns) {
       for (; itRuns != endRuns; ++itRuns) {
         if (runItemSortByRun(emptyRun, *itRuns)) {
           break;
         }
       }
       runs.insert(itRuns, emptyRun);
     }
 
     // Loop over luminosity block entries and fill information.
 
     typedef std::vector<LumiItem> LumiVector;
     LumiVector emptyLumis;  // (declare 7)
 
     typedef std::map<LuminosityBlockID, IndexIntoFile::EntryNumber_t> RunLumiMap;
     RunLumiMap runLumiMap;  // (declare 6)
 
     if (lumiTree_.isValid()) {
       while (lumiTree_.next()) {
         // Note: adjacent duplicates will be skipped without an explicit check.
         std::shared_ptr<LuminosityBlockAuxiliary> lumiAux = fillLumiAuxiliary();
         LuminosityBlockID lumiID = LuminosityBlockID(lumiAux->run(), lumiAux->luminosityBlock());
         if (runLumiSet.insert(lumiID).second) {  // (check 2, insert 2)
           // This lumi was not associated with any events.
           // Use the process history ID from the corresponding run.  In cases of practical
           // importance, this should be the correct process history ID,  but it is possible
           // to construct files where this is not the correct process history ID ...
           PHIDMap::const_iterator iPhidMap = phidMap.find(lumiAux->run());
           assert(iPhidMap != phidMap.end());
           emptyLumis.emplace_back(
               iPhidMap->second, lumiAux->run(), lumiAux->luminosityBlock(), IndexIntoFile::invalidEntry);  // (insert 7)
         }
         runLumiMap.insert(std::make_pair(lumiID, lumiTree_.entryNumber()));
       }
       // now clean up.
       lumiTree_.setEntryNumber(IndexIntoFile::invalidEntry);
     }
 
     // Insert the ordered empty lumis into the lumi list.
     LumiItemSortByRunLumi lumiItemSortByRunLumi;
     stable_sort_all(emptyLumis, lumiItemSortByRunLumi);
 
     LumiList::iterator itLumis = lumis.begin(), endLumis = lumis.end();
     for (auto const& emptyLumi : emptyLumis) {
       for (; itLumis != endLumis; ++itLumis) {
         if (lumiItemSortByRunLumi(emptyLumi, *itLumis)) {
           break;
         }
       }
       lumis.insert(itLumis, emptyLumi);
     }
 
     // Create a map of RunItems that gives the order of first appearance in the list.
     // Also fill in the vector of process history IDs
     typedef std::map<RunItem, int, RunItemSortByRunPhid> RunCountMap;
     RunCountMap runCountMap;  // Declare (17)
     std::vector<ProcessHistoryID>& phids = indexIntoFile_.setProcessHistoryIDs();
     assert(phids.empty());
     std::vector<IndexIntoFile::RunOrLumiEntry>& entries = indexIntoFile_.setRunOrLumiEntries();
     assert(entries.empty());
     int rcount = 0;
     for (auto& run : runs) {
       RunCountMap::const_iterator countMapItem = runCountMap.find(run);
       if (countMapItem == runCountMap.end()) {
         countMapItem = runCountMap.insert(std::make_pair(run, rcount)).first;  // Insert (17)
         assert(countMapItem != runCountMap.end());
         ++rcount;
       }
       std::vector<ProcessHistoryID>::const_iterator phidItem = find_in_all(phids, run.phid_);
       if (phidItem == phids.end()) {
         phids.push_back(run.phid_);
         phidItem = phids.end() - 1;
       }
       entries.emplace_back(countMapItem->second,  // use (17)
                            IndexIntoFile::invalidEntry,
                            runMap[run.run_],  // use (11)
                            phidItem - phids.begin(),
                            run.run_,
                            0U,
                            IndexIntoFile::invalidEntry,
                            IndexIntoFile::invalidEntry);
     }
 
     // Create a map of LumiItems that gives the order of first appearance in the list.
     typedef std::map<LumiItem, int, LumiItemSortByRunLumiPhid> LumiCountMap;
     LumiCountMap lumiCountMap;  // Declare (19)
     int lcount = 0;
     for (auto& lumi : lumis) {
       RunCountMap::const_iterator runCountMapItem = runCountMap.find(RunItem(lumi.phid_, lumi.run_));
       assert(runCountMapItem != runCountMap.end());
       LumiCountMap::const_iterator countMapItem = lumiCountMap.find(lumi);
       if (countMapItem == lumiCountMap.end()) {
         countMapItem = lumiCountMap.insert(std::make_pair(lumi, lcount)).first;  // Insert (17)
         assert(countMapItem != lumiCountMap.end());
         ++lcount;
       }
       std::vector<ProcessHistoryID>::const_iterator phidItem = find_in_all(phids, lumi.phid_);
       assert(phidItem != phids.end());
       entries.emplace_back(runCountMapItem->second,
                            countMapItem->second,
                            runLumiMap[LuminosityBlockID(lumi.run_, lumi.lumi_)],
                            phidItem - phids.begin(),
                            lumi.run_,
                            lumi.lumi_,
                            lumi.firstEventEntry_,
                            lumi.lastEventEntry_);
     }
     stable_sort_all(entries);
   }
 
   void RootFile::validateFile(InputType inputType,
                               bool usingGoToEvent,
                               std::vector<ProcessHistoryID>& orderedProcessHistoryIDs) {
     // Validate the file.
     if (!fid_.isValid()) {
       fid_ = FileID(createGlobalIdentifier());
     }
     if (!eventTree_.isValid()) {
       throw Exception(errors::EventCorruption) << "'Events' tree is corrupted or not present\n"
                                                << "in the input file.\n";
     }
     if (enforceGUIDInFileName_) {
       auto guidFromName = stemFromPath(file_);
       if (guidFromName != fid_.fid()) {
         throw edm::Exception(edm::errors::FileNameInconsistentWithGUID)
             << "GUID " << guidFromName << " extracted from file name " << file_
             << " is inconsistent with the GUID read from the file " << fid_.fid();
       }
     }
 
     if (fileFormatVersion().hasIndexIntoFile()) {
       if (runTree().entries() > 0) {
         assert(!indexIntoFile_.empty());
       }
       if (!fileFormatVersion().useReducedProcessHistoryID()) {
         if (daqProvenanceHelper_) {
           std::vector<ProcessHistoryID>& phidVec = indexIntoFile_.setProcessHistoryIDs();
           for (auto& phid : phidVec) {
             phid = daqProvenanceHelper_->mapProcessHistoryID(phid);
           }
         }
         indexIntoFile_.reduceProcessHistoryIDs(*processHistoryRegistry_);
       }
     } else {
       assert(indexIntoFile_.empty());
       fillIndexIntoFile();
     }
 
     indexIntoFile_.fixIndexes(orderedProcessHistoryIDs);
     indexIntoFile_.setNumberOfEvents(eventTree_.entries());
     indexIntoFile_.setEventFinder(
         std::shared_ptr<IndexIntoFile::EventFinder>(std::make_shared<RootFileEventFinder>(eventTree_)));
     // We fill the event numbers explicitly if we need to find events in closed files,
     // such as for secondary files (or secondary sources) or if duplicate checking across files.
     bool needEventNumbers = false;
     bool needIndexesForDuplicateChecker =
         duplicateChecker_ && duplicateChecker_->checkingAllFiles() && !duplicateChecker_->checkDisabled();
     if (inputType != InputType::Primary || needIndexesForDuplicateChecker || usingGoToEvent) {
       needEventNumbers = true;
     }
     bool needEventEntries = false;
     if (inputType != InputType::Primary || !noEventSort_) {
       // We need event entries for sorting or for secondary files or sources.
       needEventEntries = true;
     }
     indexIntoFile_.fillEventNumbersOrEntries(needEventNumbers, needEventEntries);
   }
 
   void RootFile::reportOpened(std::string const& inputType) {
     // Report file opened.
     std::string const label = "source";
     std::string moduleName = "PoolSource";
     filePtr_->inputFileOpened(logicalFile_, inputType, moduleName, label, fid_.fid(), eventTree_.branchNames());
   }
 
   void RootFile::close() {
     // Just to play it safe, zero all pointers to objects in the InputFile to be closed.
     eventHistoryTree_ = nullptr;
     for (auto& treePointer : treePointers_) {
       treePointer->close();
       treePointer = nullptr;
     }
     filePtr_->Close();
     filePtr_ = nullptr;  // propagate_const<T> has no reset() function
   }
 
   EventAuxiliary const& RootFile::fillThisEventAuxiliary() {
     if (lastEventEntryNumberRead_ == eventTree_.entryNumber()) {
       // Already read.
       return eventAuxCache_;
     }
     if (fileFormatVersion().newAuxiliary()) {
       EventAuxiliary* pEvAux = &eventAuxCache_;
       eventTree_.fillAux<EventAuxiliary>(pEvAux);
     } else {
       // for backward compatibility.
       EventAux eventAux;
       EventAux* pEvAux = &eventAux;
       eventTree_.fillAux<EventAux>(pEvAux);
       conversion(eventAux, eventAuxCache_);
     }
     lastEventEntryNumberRead_ = eventTree_.entryNumber();
     return eventAuxCache_;
   }
 
   EventAuxiliary RootFile::fillEventAuxiliary(IndexIntoFile::EntryNumber_t entry) {
     eventTree_.setEntryNumber(entry);
     return fillThisEventAuxiliary();
   }
 
   void RootFile::fillEventToProcessBlockIndexes() {
     TBranch* eventToProcessBlockIndexesBranch = get_underlying_safe(eventToProcessBlockIndexesBranch_);
     if (eventToProcessBlockIndexesBranch == nullptr) {
       if (processBlockHelper_.get() == nullptr) {
         eventToProcessBlockIndexes_.setIndex(0);
       } else {
         eventToProcessBlockIndexes_.setIndex(processBlockHelper_->outerOffset());
       }
     } else {
       if (processBlockHelper_->cacheIndexVectorsPerFile().back() == 1u) {
         eventToProcessBlockIndexes_.setIndex(processBlockHelper_->outerOffset());
       } else {
         EventToProcessBlockIndexes* pEventToProcessBlockIndexes = &eventToProcessBlockIndexes_;
         eventTree_.fillBranchEntry(eventToProcessBlockIndexesBranch, pEventToProcessBlockIndexes);
         unsigned int updatedIndex = eventToProcessBlockIndexes_.index() + processBlockHelper_->outerOffset();
         eventToProcessBlockIndexes_.setIndex(updatedIndex);
       }
     }
   }
 
   bool RootFile::fillEventHistory(EventAuxiliary& evtAux,
                                   EventSelectionIDVector& eventSelectionIDs,
                                   BranchListIndexes& branchListIndexes,
                                   bool assertOnFailure) {
     // We could consider doing delayed reading, but because we have to
     // store this History object in a different tree than the event
     // data tree, this is too hard to do in this first version.
     if (fileFormatVersion().eventHistoryBranch()) {
       // Lumi block number was not in EventID for the relevant releases.
       EventID id(evtAux.id().run(), 0, evtAux.id().event());
       if (eventProcessHistoryIter_->eventID() != id) {
         EventProcessHistoryID target(id, ProcessHistoryID());
         eventProcessHistoryIter_ = lower_bound_all(eventProcessHistoryIDs_, target);
         assert(eventProcessHistoryIter_->eventID() == id);
       }
       evtAux.setProcessHistoryID(eventProcessHistoryIter_->processHistoryID());
       ++eventProcessHistoryIter_;
     } else if (fileFormatVersion().eventHistoryTree()) {
       // for backward compatibility.
       History* pHistory = history_.get();
       TBranch* eventHistoryBranch = eventHistoryTree_->GetBranch(poolNames::eventHistoryBranchName().c_str());
       if (!eventHistoryBranch) {
         throw Exception(errors::EventCorruption) << "Failed to find history branch in event history tree.\n";
       }
       eventHistoryBranch->SetAddress(&pHistory);
       roottree::getEntry(eventHistoryTree_, eventTree_.entryNumber());
       eventHistoryBranch->SetAddress(nullptr);
       evtAux.setProcessHistoryID(history_->processHistoryID());
       eventSelectionIDs.swap(history_->eventSelectionIDs());
       branchListIndexes.swap(history_->branchListIndexes());
     } else if (fileFormatVersion().noMetaDataTrees()) {
       // Current format
       EventSelectionIDVector* pESV = &eventSelectionIDs;
       TBranch* eventSelectionIDBranch = eventTree_.tree()->GetBranch(poolNames::eventSelectionsBranchName().c_str());
       assert(eventSelectionIDBranch != nullptr);
       eventTree_.fillBranchEntry(eventSelectionIDBranch, pESV);
       BranchListIndexes* pBLI = &branchListIndexes;
       TBranch* branchListIndexesBranch = eventTree_.tree()->GetBranch(poolNames::branchListIndexesBranchName().c_str());
       assert(branchListIndexesBranch != nullptr);
       eventTree_.fillBranchEntry(branchListIndexesBranch, pBLI);
     }
     if (provenanceAdaptor_) {
       evtAux.setProcessHistoryID(provenanceAdaptor_->convertID(evtAux.processHistoryID()));
       for (auto& esID : eventSelectionIDs) {
         esID = provenanceAdaptor_->convertID(esID);
       }
     }
     if (daqProvenanceHelper_) {
       evtAux.setProcessHistoryID(daqProvenanceHelper_->mapProcessHistoryID(evtAux.processHistoryID()));
     }
     if (!fileFormatVersion().splitProductIDs()) {
       // old format.  branchListIndexes_ must be filled in from the ProvenanceAdaptor.
       provenanceAdaptor_->branchListIndexes(branchListIndexes);
     }
     if (branchIDListHelper_) {
       return branchIDListHelper_->fixBranchListIndexes(branchListIndexes, assertOnFailure);
     }
     return true;
   }
 
   std::shared_ptr<LuminosityBlockAuxiliary> RootFile::fillLumiAuxiliary() {
     auto lumiAuxiliary = std::make_shared<LuminosityBlockAuxiliary>();
     if (fileFormatVersion().newAuxiliary()) {
       LuminosityBlockAuxiliary* pLumiAux = lumiAuxiliary.get();
       lumiTree_.fillAux<LuminosityBlockAuxiliary>(pLumiAux);
     } else {
       LuminosityBlockAux lumiAux;
       LuminosityBlockAux* pLumiAux = &lumiAux;
       lumiTree_.fillAux<LuminosityBlockAux>(pLumiAux);
       conversion(lumiAux, *lumiAuxiliary);
     }
     if (provenanceAdaptor_) {
       lumiAuxiliary->setProcessHistoryID(provenanceAdaptor_->convertID(lumiAuxiliary->processHistoryID()));
     }
     if (daqProvenanceHelper_) {
       lumiAuxiliary->setProcessHistoryID(daqProvenanceHelper_->mapProcessHistoryID(lumiAuxiliary->processHistoryID()));
     }
     if (lumiAuxiliary->luminosityBlock() == 0 && !fileFormatVersion().runsAndLumis()) {
       lumiAuxiliary->id() = LuminosityBlockID(RunNumber_t(1), LuminosityBlockNumber_t(1));
     }
     return lumiAuxiliary;
   }
 
   std::shared_ptr<RunAuxiliary> RootFile::fillRunAuxiliary() {
     auto runAuxiliary = std::make_shared<RunAuxiliary>();
     if (fileFormatVersion().newAuxiliary()) {
       RunAuxiliary* pRunAux = runAuxiliary.get();
       runTree_.fillAux<RunAuxiliary>(pRunAux);
     } else {
       RunAux runAux;
       RunAux* pRunAux = &runAux;
       runTree_.fillAux<RunAux>(pRunAux);
       conversion(runAux, *runAuxiliary);
     }
     if (provenanceAdaptor_) {
       runAuxiliary->setProcessHistoryID(provenanceAdaptor_->convertID(runAuxiliary->processHistoryID()));
     }
     if (daqProvenanceHelper_) {
       runAuxiliary->setProcessHistoryID(daqProvenanceHelper_->mapProcessHistoryID(runAuxiliary->processHistoryID()));
     }
     return runAuxiliary;
   }
 
   bool RootFile::skipEvents(int& offset) {
     while (offset > 0 && indexIntoFileIter_ != indexIntoFileEnd_) {
       int phIndexOfSkippedEvent = IndexIntoFile::invalidIndex;
       RunNumber_t runOfSkippedEvent = IndexIntoFile::invalidRun;
       LuminosityBlockNumber_t lumiOfSkippedEvent = IndexIntoFile::invalidLumi;
       IndexIntoFile::EntryNumber_t skippedEventEntry = IndexIntoFile::invalidEntry;
 
       indexIntoFileIter_.skipEventForward(
           phIndexOfSkippedEvent, runOfSkippedEvent, lumiOfSkippedEvent, skippedEventEntry);
 
       // At the end of the file and there were no more events to skip
       if (skippedEventEntry == IndexIntoFile::invalidEntry)
         break;
 
       if (eventSkipperByID_ && eventSkipperByID_->somethingToSkip()) {
         auto const evtAux = fillEventAuxiliary(skippedEventEntry);
         if (eventSkipperByID_->skipIt(runOfSkippedEvent, lumiOfSkippedEvent, evtAux.id().event())) {
           continue;
         }
       }
       if (duplicateChecker_ && !duplicateChecker_->checkDisabled() && !duplicateChecker_->noDuplicatesInFile()) {
         auto const evtAux = fillEventAuxiliary(skippedEventEntry);
         if (duplicateChecker_->isDuplicateAndCheckActive(
                 phIndexOfSkippedEvent, runOfSkippedEvent, lumiOfSkippedEvent, evtAux.id().event(), file_)) {
           continue;
         }
       }
       --offset;
     }
 
     while (offset < 0) {
       if (duplicateChecker_) {
         duplicateChecker_->disable();
       }
 
       int phIndexOfEvent = IndexIntoFile::invalidIndex;
       RunNumber_t runOfEvent = IndexIntoFile::invalidRun;
       LuminosityBlockNumber_t lumiOfEvent = IndexIntoFile::invalidLumi;
       IndexIntoFile::EntryNumber_t eventEntry = IndexIntoFile::invalidEntry;
 
       indexIntoFileIter_.skipEventBackward(phIndexOfEvent, runOfEvent, lumiOfEvent, eventEntry);
 
       if (eventEntry == IndexIntoFile::invalidEntry)
         break;
 
       if (eventSkipperByID_ && eventSkipperByID_->somethingToSkip()) {
         auto const evtAux = fillEventAuxiliary(eventEntry);
         if (eventSkipperByID_->skipIt(runOfEvent, lumiOfEvent, evtAux.id().event())) {
           continue;
         }
       }
       ++offset;
     }
     return (indexIntoFileIter_ == indexIntoFileEnd_);
   }
 
   bool RootFile::goToEvent(EventID const& eventID) {
     indexIntoFile_.fillEventNumbers();
 
     if (duplicateChecker_) {
       duplicateChecker_->disable();
     }
 
     IndexIntoFile::SortOrder sortOrder = IndexIntoFile::numericalOrder;
     if (noEventSort_)
       sortOrder = IndexIntoFile::firstAppearanceOrder;
     if (noRunLumiSort_) {
       sortOrder = IndexIntoFile::entryOrder;
     }
 
     IndexIntoFile::IndexIntoFileItr iter =
         indexIntoFile_.findPosition(sortOrder, eventID.run(), eventID.luminosityBlock(), eventID.event());
 
     if (iter == indexIntoFile_.end(sortOrder)) {
       return false;
     }
     indexIntoFileIter_ = iter;
     return true;
   }
 
   // readEvent() is responsible for creating, and setting up, the
   // EventPrincipal.
   //
   //   1. create an EventPrincipal with a unique EventID
   //   2. For each entry in the provenance, put in one ProductResolver,
   //      holding the Provenance for the corresponding EDProduct.
   //   3. set up the the EventPrincipal to know about this ProductResolver.
   //
   // We do *not* create the EDProduct instance (the equivalent of reading
   // the branch containing this EDProduct. That will be done by the Delayed Reader,
   //  when it is asked to do so.
   //
   bool RootFile::readEvent(EventPrincipal& principal, bool readAllProducts) {
     assert(indexIntoFileIter_ != indexIntoFileEnd_);
     assert(indexIntoFileIter_.getEntryType() == IndexIntoFile::kEvent);
     // read the event
     auto [found, succeeded] = readCurrentEvent(principal, false, readAllProducts);
     auto const& evtAux = principal.aux();
 
     runHelper_->checkRunConsistency(evtAux.run(), indexIntoFileIter_.run());
     runHelper_->checkLumiConsistency(evtAux.luminosityBlock(), indexIntoFileIter_.lumi());
 
     ++indexIntoFileIter_;
     return succeeded;
   }
 
   // Reads event at the current entry in the event tree
   std::tuple<bool, bool> RootFile::readCurrentEvent(EventPrincipal& principal,
                                                     bool assertOnFailure,
                                                     bool readAllProducts) {
     bool found = true;
     bool succeeded = true;
     if (!eventTree_.current()) {
       found = false;
       return {found, succeeded};
     }
     auto evtAux = fillThisEventAuxiliary();
     if (!fileFormatVersion().lumiInEventID()) {
       //ugly, but will disappear when the backward compatibility is done with schema evolution.
       const_cast<EventID&>(evtAux.id()).setLuminosityBlockNumber(evtAux.oldLuminosityBlock());
       evtAux.resetObsoleteInfo();
     }
     fillEventToProcessBlockIndexes();
     EventSelectionIDVector eventSelectionIDs;
     BranchListIndexes branchListIndexes;
     if (!fillEventHistory(evtAux, eventSelectionIDs, branchListIndexes, assertOnFailure)) {
       succeeded = false;
     }
     runHelper_->overrideRunNumber(evtAux.id(), evtAux.isRealData());
 
     // We're not done ... so prepare the EventPrincipal
     eventTree_.insertEntryForIndex(principal.transitionIndex());
     auto provRetriever = makeProductProvenanceRetriever(principal.streamID().value());
     if (readAllProducts) {
       eventTree_.rootDelayedReader()->readAllProductsNow(&principal);
       provRetriever->unsafe_fillProvenance();
     }
     auto history = processHistoryRegistry_->getMapped(evtAux.processHistoryID());
     principal.fillEventPrincipal(evtAux,
                                  history,
                                  std::move(eventSelectionIDs),
                                  std::move(branchListIndexes),
                                  eventToProcessBlockIndexes_,
                                  *provRetriever,
                                  eventTree_.resetAndGetRootDelayedReader());
 
     // If this next assert shows up in performance profiling or significantly affects memory, then these three lines should be deleted.
     // The IndexIntoFile should guarantee that it never fails.
     ProcessHistoryID idToCheck = (daqProvenanceHelper_ && fileFormatVersion().useReducedProcessHistoryID()
                                       ? *daqProvenanceHelper_->oldProcessHistoryID()
                                       : evtAux.processHistoryID());
     ProcessHistoryID const& reducedPHID = processHistoryRegistry_->reducedProcessHistoryID(idToCheck);
     assert(reducedPHID == indexIntoFile_.processHistoryID(indexIntoFileIter_.processHistoryIDIndex()));
 
     // report event read from file
     filePtr_->eventReadFromFile();
     return {found, succeeded};
   }
 
   void RootFile::setAtEventEntry(IndexIntoFile::EntryNumber_t entry) { eventTree_.setEntryNumber(entry); }
 
   std::shared_ptr<RunAuxiliary> RootFile::readRunAuxiliary_() {
     if (runHelper_->fakeNewRun()) {
       auto runAuxiliary = std::make_shared<RunAuxiliary>(*savedRunAuxiliary());
       runHelper_->overrideRunNumber(runAuxiliary->id());
       return runAuxiliary;
     }
     assert(indexIntoFileIter_ != indexIntoFileEnd_);
     assert(indexIntoFileIter_.getEntryType() == IndexIntoFile::kRun);
 
     // Begin code for backward compatibility before the existence of run trees.
     if (!runTree_.isValid()) {
       // prior to the support of run trees.
       // RunAuxiliary did not contain a valid timestamp.  Take it from the next event.
       IndexIntoFile::EntryNumber_t eventEntry = indexIntoFileIter_.firstEventEntryThisRun();
       assert(eventEntry != IndexIntoFile::invalidEntry);
       assert(eventTree_.current(eventEntry));
       auto const evtAux = fillEventAuxiliary(eventEntry);
 
       RunID run = RunID(indexIntoFileIter_.run());
       runHelper_->overrideRunNumber(run);
       savedRunAuxiliary_ = std::make_shared<RunAuxiliary>(run.run(), evtAux.time(), Timestamp::invalidTimestamp());
       return savedRunAuxiliary();
     }
     // End code for backward compatibility before the existence of run trees.
     runTree_.setEntryNumber(indexIntoFileIter_.entry());
     std::shared_ptr<RunAuxiliary> runAuxiliary = fillRunAuxiliary();
     assert(runAuxiliary->run() == indexIntoFileIter_.run());
     runHelper_->overrideRunNumber(runAuxiliary->id());
     filePtr_->reportInputRunNumber(runAuxiliary->run());
     // If RunAuxiliary did not contain a valid begin timestamp, invalidate any end timestamp.
     if (runAuxiliary->beginTime() == Timestamp::invalidTimestamp()) {
       runAuxiliary->setEndTime(Timestamp::invalidTimestamp());
     }
 
     // If RunAuxiliary did not contain a valid timestamp, or if this an old format file from
     // when the Run's ProcessHistory included only processes where products were added to the Run itself,
     // we attempt to read the first event in the run to get appropriate info.
     if (runAuxiliary->beginTime() == Timestamp::invalidTimestamp() ||
         !fileFormatVersion().processHistorySameWithinRun()) {
       IndexIntoFile::EntryNumber_t eventEntry = indexIntoFileIter_.firstEventEntryThisRun();
       // If we have a valid event, use its information.
       if (eventEntry != IndexIntoFile::invalidEntry) {
         assert(eventTree_.current(eventEntry));
         auto evtAux = fillEventAuxiliary(eventEntry);
 
         // RunAuxiliary did not contain a valid timestamp.  Take it from the next event in this run if there is one.
         if (runAuxiliary->beginTime() == Timestamp::invalidTimestamp()) {
           runAuxiliary->setBeginTime(evtAux.time());
         }
 
         // For backwards compatibility when the Run's ProcessHistory included only processes where products were added to the
         // Run, and then the Run and Event auxiliaries could be different.  Use the event ProcessHistoryID if there is one. It should
         // almost always be correct by the current definition (processes included if any products are added. This makes the run, lumi,
         // and event ProcessHistory's always be the same if no file merging occurs).
         if (!fileFormatVersion().processHistorySameWithinRun()) {
           EventSelectionIDVector eventSelectionIDs;
           BranchListIndexes branchListIndexes;
           fillEventHistory(evtAux, eventSelectionIDs, branchListIndexes);
           runAuxiliary->setProcessHistoryID(evtAux.processHistoryID());
         }
       }
     }
     savedRunAuxiliary_ = runAuxiliary;
     return runAuxiliary;
   }
 
   void RootFile::fillProcessBlockHelper_() {
     assert(inputType_ == InputType::Primary);
     std::vector<unsigned int> nEntries;
     nEntries.reserve(processBlockTrees_.size());
     for (auto const& processBlockTree : processBlockTrees_) {
       nEntries.push_back(processBlockTree->entries());
     }
     processBlockHelper_->fillFromPrimaryInput(*storedProcessBlockHelper_, nEntries);
     storedProcessBlockHelper_ =
         std::make_unique<StoredProcessBlockHelper>();  // propagate_const<T> has no reset() function
   }
 
   bool RootFile::initializeFirstProcessBlockEntry() {
     if (processBlockTrees_[currentProcessBlockTree_]->entryNumber() == IndexIntoFile::invalidEntry) {
       processBlockTrees_[currentProcessBlockTree_]->setEntryNumber(0);
       assert(processBlockTrees_[currentProcessBlockTree_]->current());
       return true;
     }
     return false;
   }
 
   bool RootFile::endOfProcessBlocksReached() const { return currentProcessBlockTree_ >= processBlockTrees_.size(); }
 
   bool RootFile::nextProcessBlock_(ProcessBlockPrincipal&) {
     assert(inputType_ == InputType::Primary);
     if (endOfProcessBlocksReached()) {
       return false;
     }
     if (initializeFirstProcessBlockEntry()) {
       return true;
     }
     // With the current design, the RootFile should always be
     // set to a valid ProcessBlock entry in one of the TTrees
     // if it not at the end.
     assert(processBlockTrees_[currentProcessBlockTree_]->current());
     // Try for next entry in the same TTree
     if (processBlockTrees_[currentProcessBlockTree_]->nextWithCache()) {
       return true;
     }
     // Next ProcessBlock TTree
     ++currentProcessBlockTree_;
     if (endOfProcessBlocksReached()) {
       return false;
     }
     // With current design there should always be at least one entry.
     // Initialize for that entry.
     processBlockTrees_[currentProcessBlockTree_]->setEntryNumber(0);
     assert(processBlockTrees_[currentProcessBlockTree_]->current());
     return true;
   }
 
   void RootFile::readProcessBlock_(ProcessBlockPrincipal& processBlockPrincipal) {
     assert(inputType_ == InputType::Primary);
     RootTree* rootTree = processBlockTrees_[currentProcessBlockTree_].get();
     rootTree->insertEntryForIndex(0);
     assert(!rootTree->processName().empty());
     processBlockPrincipal.fillProcessBlockPrincipal(rootTree->processName(), rootTree->resetAndGetRootDelayedReader());
   }
 
   bool RootFile::readRun_(RunPrincipal& runPrincipal) {
     bool shouldProcessRun = indexIntoFileIter_.shouldProcessRun();
 
     MergeableRunProductMetadata* mergeableRunProductMetadata = nullptr;
     if (shouldProcessRun) {
       if (inputType_ == InputType::Primary) {
         mergeableRunProductMetadata = runPrincipal.mergeableRunProductMetadata();
         RootTree::EntryNumber const& entryNumber = runTree_.entryNumber();
         assert(entryNumber >= 0);
         mergeableRunProductMetadata->readRun(
             entryNumber, *storedMergeableRunProductMetadata_, IndexIntoFileItrHolder(indexIntoFileIter_));
       }
     }
 
     if (!runHelper_->fakeNewRun()) {
       assert(indexIntoFileIter_ != indexIntoFileEnd_);
       assert(indexIntoFileIter_.getEntryType() == IndexIntoFile::kRun);
       ++indexIntoFileIter_;
     }
     // Begin code for backward compatibility before the existence of run trees.
     if (!runTree_.isValid()) {
       return shouldProcessRun;
     }
     // End code for backward compatibility before the existence of run trees.
     if (shouldProcessRun) {
       // NOTE: we use 0 for the index since do not do delayed reads for RunPrincipals
       runTree_.insertEntryForIndex(0);
       runPrincipal.fillRunPrincipal(*processHistoryRegistry_, runTree_.resetAndGetRootDelayedReader());
       // Read in all the products now.
       runPrincipal.readAllFromSourceAndMergeImmediately(mergeableRunProductMetadata);
       runPrincipal.setShouldWriteRun(RunPrincipal::kYes);
     } else {
       runPrincipal.fillRunPrincipal(*processHistoryRegistry_, nullptr);
       if (runPrincipal.shouldWriteRun() != RunPrincipal::kYes) {
         runPrincipal.setShouldWriteRun(RunPrincipal::kNo);
       }
     }
     return shouldProcessRun;
   }
 
   std::shared_ptr<LuminosityBlockAuxiliary> RootFile::readLuminosityBlockAuxiliary_() {
     assert(indexIntoFileIter_ != indexIntoFileEnd_);
     assert(indexIntoFileIter_.getEntryType() == IndexIntoFile::kLumi);
     // Begin code for backward compatibility before the existence of lumi trees.
     if (!lumiTree_.isValid()) {
       IndexIntoFile::EntryNumber_t eventEntry = indexIntoFileIter_.firstEventEntryThisLumi();
       assert(eventEntry != IndexIntoFile::invalidEntry);
       assert(eventTree_.current(eventEntry));
       auto const evtAux = fillEventAuxiliary(eventEntry);
 
       LuminosityBlockID lumi = LuminosityBlockID(indexIntoFileIter_.run(), indexIntoFileIter_.lumi());
       runHelper_->overrideRunNumber(lumi);
       return std::make_shared<LuminosityBlockAuxiliary>(
           lumi.run(), lumi.luminosityBlock(), evtAux.time(), Timestamp::invalidTimestamp());
     }
     // End code for backward compatibility before the existence of lumi trees.
     lumiTree_.setEntryNumber(indexIntoFileIter_.entry());
     std::shared_ptr<LuminosityBlockAuxiliary> lumiAuxiliary = fillLumiAuxiliary();
     assert(lumiAuxiliary->run() == indexIntoFileIter_.run());
     assert(lumiAuxiliary->luminosityBlock() == indexIntoFileIter_.lumi());
     runHelper_->overrideRunNumber(lumiAuxiliary->id());
     filePtr_->reportInputLumiSection(lumiAuxiliary->run(), lumiAuxiliary->luminosityBlock());
     if (lumiAuxiliary->beginTime() == Timestamp::invalidTimestamp()) {
       IndexIntoFile::EntryNumber_t eventEntry = indexIntoFileIter_.firstEventEntryThisLumi();
       if (eventEntry != IndexIntoFile::invalidEntry) {
         assert(eventTree_.current(eventEntry));
         auto const evtAux = fillEventAuxiliary(eventEntry);
 
         lumiAuxiliary->setBeginTime(evtAux.time());
       }
       lumiAuxiliary->setEndTime(Timestamp::invalidTimestamp());
     }
     if (!fileFormatVersion().processHistorySameWithinRun() && savedRunAuxiliary_) {
       lumiAuxiliary->setProcessHistoryID(savedRunAuxiliary_->processHistoryID());
     }
     return lumiAuxiliary;
   }
 
   bool RootFile::readLuminosityBlock_(LuminosityBlockPrincipal& lumiPrincipal) {
     bool shouldProcessLumi = indexIntoFileIter_.shouldProcessLumi();
     assert(indexIntoFileIter_ != indexIntoFileEnd_);
     assert(indexIntoFileIter_.getEntryType() == IndexIntoFile::kLumi);
     // Begin code for backward compatibility before the existence of lumi trees.
     if (!lumiTree_.isValid()) {
       ++indexIntoFileIter_;
       return shouldProcessLumi;
     }
     // End code for backward compatibility before the existence of lumi trees.
     if (shouldProcessLumi) {
       lumiTree_.setEntryNumber(indexIntoFileIter_.entry());
       // NOTE: we use 0 for the index since do not do delayed reads for LuminosityBlockPrincipals
       lumiTree_.insertEntryForIndex(0);
       auto history = processHistoryRegistry_->getMapped(lumiPrincipal.aux().processHistoryID());
       lumiPrincipal.fillLuminosityBlockPrincipal(history, lumiTree_.resetAndGetRootDelayedReader());
       // Read in all the products now.
       lumiPrincipal.readAllFromSourceAndMergeImmediately();
       lumiPrincipal.setShouldWriteLumi(LuminosityBlockPrincipal::kYes);
     } else {
       auto history = processHistoryRegistry_->getMapped(lumiPrincipal.aux().processHistoryID());
       lumiPrincipal.fillLuminosityBlockPrincipal(history, nullptr);
       if (lumiPrincipal.shouldWriteLumi() != LuminosityBlockPrincipal::kYes) {
         lumiPrincipal.setShouldWriteLumi(LuminosityBlockPrincipal::kNo);
       }
     }
     ++indexIntoFileIter_;
     return shouldProcessLumi;
   }
 
   bool RootFile::setEntryAtEvent(RunNumber_t run, LuminosityBlockNumber_t lumi, EventNumber_t event) {
     indexIntoFileIter_ = indexIntoFile_.findEventPosition(run, lumi, event);
     if (indexIntoFileIter_ == indexIntoFileEnd_)
       return false;
     eventTree_.setEntryNumber(indexIntoFileIter_.entry());
     return true;
   }
 
   bool RootFile::setEntryAtLumi(RunNumber_t run, LuminosityBlockNumber_t lumi) {
     indexIntoFileIter_ = indexIntoFile_.findLumiPosition(run, lumi);
     if (indexIntoFileIter_ == indexIntoFileEnd_)
       return false;
     lumiTree_.setEntryNumber(indexIntoFileIter_.entry());
     return true;
   }
 
   bool RootFile::setEntryAtRun(RunNumber_t run) {
     indexIntoFileIter_ = indexIntoFile_.findRunPosition(run);
     if (indexIntoFileIter_ == indexIntoFileEnd_)
       return false;
     runTree_.setEntryNumber(indexIntoFileIter_.entry());
     return true;
   }
 
   bool RootFile::setEntryAtNextEventInLumi(RunNumber_t run, LuminosityBlockNumber_t lumi) {
     if (indexIntoFileIter_.getEntryType() == IndexIntoFile::kEvent) {
       ++indexIntoFileIter_;
     }
     indexIntoFileIter_.advanceToEvent();
     if (indexIntoFileIter_.getEntryType() != IndexIntoFile::kEvent)
       return false;
     if (run != indexIntoFileIter_.run())
       return false;
     if (lumi != indexIntoFileIter_.lumi())
       return false;
     //The following is used for its side effect of advancing the
     // eventTree entry.
     fillEventAuxiliary(indexIntoFileIter_.entry());
     return true;
   }
 
   void RootFile::readEventHistoryTree() {
     // Read in the event history tree, if we have one...
     if (fileFormatVersion().eventHistoryTree()) {
       history_ = std::make_unique<History>();  // propagate_const<T> has no reset() function
       eventHistoryTree_ = dynamic_cast<TTree*>(filePtr_->Get(poolNames::eventHistoryTreeName().c_str()));
       if (!eventHistoryTree_) {
         throw Exception(errors::EventCorruption) << "Failed to find the event history tree.\n";
       }
     }
   }
 
   void RootFile::initializeDuplicateChecker(
       std::vector<std::shared_ptr<IndexIntoFile>> const& indexesIntoFiles,
       std::vector<std::shared_ptr<IndexIntoFile>>::size_type currentIndexIntoFile) {
     if (duplicateChecker_ && !duplicateChecker_->checkDisabled()) {
       if (eventTree_.next()) {
         auto const evtAux = fillThisEventAuxiliary();
 
         duplicateChecker_->inputFileOpened(evtAux.isRealData(), indexIntoFile_, indexesIntoFiles, currentIndexIntoFile);
       }
       eventTree_.setEntryNumber(IndexIntoFile::invalidEntry);
     }
   }
 
   void RootFile::setPresenceInProductRegistry(ProductRegistry& inputProdDescReg,
                                               StoredProcessBlockHelper const& storedProcessBlockHelper) {
     // Set product presence information in the product registry.
     // "Presence" is a boolean that is true if and only if the TBranch exists
     // in the TTree (except it will be false for ProcessBlock products in non-Primary
     // input files).
     ProductRegistry::ProductList& pList = inputProdDescReg.productListUpdator();
     for (auto& product : pList) {
       ProductDescription& prod = product.second;
       // Initialize ProductDescription from dictionary only if the
       // branch is present. This allows a subsequent job to process
       // data where a dictionary of a transient parent branch has been
       // removed from the release after the file has been written.
       prod.initBranchName();
       if (prod.branchType() == InProcess) {
         std::vector<std::string> const& processes = storedProcessBlockHelper.processesWithProcessBlockProducts();
         auto it = std::find(processes.begin(), processes.end(), prod.processName());
         if (it != processes.end()) {
           auto index = std::distance(processes.begin(), it);
           processBlockTrees_[index]->setPresence(prod, newBranchToOldBranch(prod.branchName()));
         } else {
           // Given current rules for saving ProductDescriptions, this case should only occur
           // in non-Primary sequences.
           prod.setDropped(true);
         }
       } else {
         treePointers_[prod.branchType()]->setPresence(prod, newBranchToOldBranch(prod.branchName()));
       }
       if (prod.present()) {
         prod.initFromDictionary();
       }
     }
   }
 
   void RootFile::markBranchToBeDropped(bool dropDescendants,
                                        ProductDescription const& branch,
                                        std::set<BranchID>& branchesToDrop,
                                        std::map<BranchID, BranchID> const& droppedToKeptAlias) const {
     if (dropDescendants) {
       productDependencies_->appendToDescendants(branch, branchesToDrop, droppedToKeptAlias);
     } else {
       branchesToDrop.insert(branch.branchID());
     }
   }
 
   void RootFile::dropOnInputAndReorder(ProductRegistry& reg,
                                        ProductSelectorRules const& rules,
                                        bool dropDescendants,
                                        InputType inputType,
                                        StoredProcessBlockHelper& storedProcessBlockHelper,
                                        ProcessBlockHelper const* processBlockHelper) {
     ProductRegistry::ProductList& prodList = reg.productListUpdator();
 
     // First fill in a map we will need to navigate to descendants
     // in the case of EDAliases.
     std::map<BranchID, BranchID> droppedToKeptAlias;
     for (auto const& product : prodList) {
       ProductDescription const& prod = product.second;
       if (prod.branchID() != prod.originalBranchID() && prod.present()) {
         droppedToKeptAlias[prod.originalBranchID()] = prod.branchID();
       }
     }
 
     // This object will select products based on the branchName and the
     // keep and drop statements which are in the source configuration.
     ProductSelector productSelector;
     productSelector.initialize(rules, reg.allProductDescriptions());
 
     // In this pass, fill in a set of branches to be dropped.
     // Don't drop anything yet.
     std::set<BranchID> branchesToDrop;
     std::vector<ProductDescription const*> associationDescriptions;
     for (auto const& product : prodList) {
       ProductDescription const& prod = product.second;
       if (inputType != InputType::Primary && prod.branchType() == InProcess) {
         markBranchToBeDropped(dropDescendants, prod, branchesToDrop, droppedToKeptAlias);
       } else if (prod.unwrappedType() == typeid(ThinnedAssociation) && prod.present()) {
         // Special handling for ThinnedAssociations
         if (inputType != InputType::SecondarySource) {
           associationDescriptions.push_back(&prod);
         } else {
           markBranchToBeDropped(dropDescendants, prod, branchesToDrop, droppedToKeptAlias);
         }
       } else if (!productSelector.selected(prod)) {
         markBranchToBeDropped(dropDescendants, prod, branchesToDrop, droppedToKeptAlias);
       }
     }
 
     if (inputType != InputType::SecondarySource) {
       // Decide whether to keep the thinned associations and corresponding
       // entries in the helper. For secondary source they are all dropped,
       // but in other cases we look for thinned collections the associations
       // redirect a Ref or Ptr to when dereferencing them.
 
       // Need a list of kept products in order to determine which thinned associations
       // are kept.
       std::set<BranchID> keptProductsInEvent;
       for (auto const& product : prodList) {
         ProductDescription const& prod = product.second;
         if (branchesToDrop.find(prod.branchID()) == branchesToDrop.end() && prod.present() &&
             prod.branchType() == InEvent) {
           keptProductsInEvent.insert(prod.branchID());
         }
       }
 
       // Decide which ThinnedAssociations to keep and store the decision in keepAssociation
       std::map<BranchID, bool> keepAssociation;
       fileThinnedAssociationsHelper_->selectAssociationProducts(
           associationDescriptions, keptProductsInEvent, keepAssociation);
 
       for (auto association : associationDescriptions) {
         if (!keepAssociation[association->branchID()]) {
           markBranchToBeDropped(dropDescendants, *association, branchesToDrop, droppedToKeptAlias);
         }
       }
 
       // Also delete the dropped associations from the ThinnedAssociationsHelper
       auto temp = std::make_unique<ThinnedAssociationsHelper>();
       for (auto const& associationBranches : fileThinnedAssociationsHelper_->data()) {
         auto iter = keepAssociation.find(associationBranches.association());
         if (iter != keepAssociation.end() && iter->second) {
           temp->addAssociation(associationBranches);
         }
       }
       // propagate_const<T> has no reset() function
       fileThinnedAssociationsHelper_ = std::unique_ptr<ThinnedAssociationsHelper>(temp.release());
     }
 
     // On this pass, actually drop the branches.
     std::set<std::string> processesWithKeptProcessBlockProducts;
     std::set<BranchID>::const_iterator branchesToDropEnd = branchesToDrop.end();
     for (ProductRegistry::ProductList::iterator it = prodList.begin(), itEnd = prodList.end(); it != itEnd;) {
       ProductDescription const& prod = it->second;
       bool drop = branchesToDrop.find(prod.branchID()) != branchesToDropEnd;
       if (drop) {
         if (!prod.dropped()) {
           if (productSelector.selected(prod) && prod.unwrappedType() != typeid(ThinnedAssociation) &&
               prod.branchType() != InProcess) {
             LogWarning("RootFile") << "Branch '" << prod.branchName() << "' is being dropped from the input\n"
                                    << "of file '" << file_ << "' because it is dependent on a branch\n"
                                    << "that was explicitly dropped.\n";
           }
           if (prod.branchType() == InProcess) {
             std::vector<std::string> const& processes = storedProcessBlockHelper.processesWithProcessBlockProducts();
             auto it = std::find(processes.begin(), processes.end(), prod.processName());
             assert(it != processes.end());
             auto index = std::distance(processes.begin(), it);
             processBlockTrees_[index]->dropBranch(newBranchToOldBranch(prod.branchName()));
           } else {
             treePointers_[prod.branchType()]->dropBranch(newBranchToOldBranch(prod.branchName()));
           }
           hasNewlyDroppedBranch_[prod.branchType()] = true;
         }
         ProductRegistry::ProductList::iterator icopy = it;
         ++it;
         prodList.erase(icopy);
       } else {
         if (prod.branchType() == InProcess && prod.present()) {
           processesWithKeptProcessBlockProducts.insert(prod.processName());
         }
         ++it;
       }
     }
 
     dropProcessesAndReorder(storedProcessBlockHelper, processesWithKeptProcessBlockProducts, processBlockHelper);
 
     // Drop on input mergeable run and lumi products, this needs to be invoked for secondary file input
     if (inputType == InputType::SecondaryFile) {
       TString tString;
       for (ProductRegistry::ProductList::iterator it = prodList.begin(), itEnd = prodList.end(); it != itEnd;) {
         ProductDescription const& prod = it->second;
         if (prod.present() and prod.branchType() != InEvent and prod.branchType() != InProcess) {
           TClass* cp = prod.wrappedType().getClass();
           void* p = cp->New();
           int offset = cp->GetBaseClassOffset(edProductClass_);
           std::unique_ptr<WrapperBase> edp = getWrapperBasePtr(p, offset);
           if (edp->isMergeable()) {
             treePointers_[prod.branchType()]->dropBranch(newBranchToOldBranch(prod.branchName()));
             ProductRegistry::ProductList::iterator icopy = it;
             ++it;
             prodList.erase(icopy);
           } else {
             ++it;
           }
         } else
           ++it;
       }
     }
   }
 
   void RootFile::dropProcessesAndReorder(StoredProcessBlockHelper& storedProcessBlockHelper,
                                          std::set<std::string> const& processesWithKeptProcessBlockProducts,
                                          ProcessBlockHelper const* processBlockHelper) {
     // Modify storedProcessBlockHelper and processBlockTrees_
     // This should account for dropOnInput and also make the
     // order of process blocks in input files after the first
     // be the same as the first. Processes with no ProcessBlock
     // products should be removed. After this executes,
     // the items in storedProcessBlockHelper
     // and processBlockTrees should be in exact one to one
     // correspondence and in the same order. For input files
     // after the first, these items should be either the same
     // as or a subset of the items in processBlockHelper and in
     // the same order.
 
     if (processBlockTrees_.empty()) {
       return;
     }
 
     std::vector<unsigned int> nEntries;
     nEntries.reserve(processBlockTrees_.size());
     for (auto const& processBlockTree : processBlockTrees_) {
       nEntries.push_back(processBlockTree->entries());
     }
 
     bool firstInputFile = !processBlockHelper->initializedFromInput();
     bool isModified = false;
     std::vector<unsigned int> finalIndexToStoredIndex;
 
     if (firstInputFile) {
       isModified = processBlockHelper->firstFileDropProcessesAndReorderStored(
           storedProcessBlockHelper, processesWithKeptProcessBlockProducts, nEntries, finalIndexToStoredIndex);
     } else {
       isModified =
           processBlockHelper->dropProcessesAndReorderStored(storedProcessBlockHelper,
                                                             processesWithKeptProcessBlockProducts,
                                                             nEntries,
                                                             finalIndexToStoredIndex,
                                                             processBlockHelper->processesWithProcessBlockProducts());
     }
 
     // At this point, any modifications to storedProcessBlockHelper are done.
     // Make consistent changes to processBlockTrees_ and this will cause
     // unneeded RootTrees to be deleted.
     if (isModified) {
       std::vector<edm::propagate_const<std::unique_ptr<RootTree>>> newProcessBlockTrees;
       unsigned int nFinalProducts = storedProcessBlockHelper.processesWithProcessBlockProducts().size();
       for (unsigned int j = 0; j < nFinalProducts; ++j) {
         unsigned int iStored = finalIndexToStoredIndex[j];
         newProcessBlockTrees.push_back(std::move(processBlockTrees_[iStored]));
       }
       processBlockTrees_.swap(newProcessBlockTrees);
     }
   }
 
   void RootFile::setSignals(
       signalslot::Signal<void(StreamContext const&, ModuleCallingContext const&)> const* preEventReadSource,
       signalslot::Signal<void(StreamContext const&, ModuleCallingContext const&)> const* postEventReadSource) {
     eventTree_.setSignals(preEventReadSource, postEventReadSource);
   }
 
   void RootFile::makeProcessBlockRootTrees(std::shared_ptr<InputFile> filePtr,
                                            TTreeOptions const& options,
                                            InputType inputType,
                                            StoredProcessBlockHelper const& storedProcessBlockHelper) {
     // When this functions returns there will be exactly a 1-to-1 correspondence between the
     // processes listed in storedProcessBlockHelper and the RootTree objects created. processBlockTrees_
     // has pointers to the RootTree's and will be filled in the same order. The RootTree constructor
     // will throw an exception if one of these TTree's is not in the file and this should be all of
     // the ProcessBlock TTree's in the file. (later in the RootFile constructor, dropOnInput might
     // remove some and also reordering may occur).
     for (auto const& process : storedProcessBlockHelper.processesWithProcessBlockProducts()) {
       processBlockTrees_.emplace_back(std::make_unique<RootTree>(filePtr,
                                                                  InProcess,
                                                                  process,
                                                                  1,
                                                                  options.usingDefaultNonEventOptions(),
                                                                  roottree::defaultNonEventLearningEntries,
                                                                  inputType));
     }
   }
 
   std::unique_ptr<MakeProvenanceReader> RootFile::makeProvenanceReaderMaker(InputType inputType) {
     if (fileFormatVersion_.storedProductProvenanceUsed()) {
       readParentageTree(inputType);
       return std::make_unique<MakeReducedProvenanceReader>(parentageIDLookup_);
     } else if (fileFormatVersion_.splitProductIDs()) {
       readParentageTree(inputType);
       return std::make_unique<MakeFullProvenanceReader>();
     } else if (fileFormatVersion_.perEventProductIDs()) {
       auto entryDescriptionMap = std::make_unique<EntryDescriptionMap>();
       readEntryDescriptionTree(*entryDescriptionMap, inputType);
       return std::make_unique<MakeOldProvenanceReader>(std::move(entryDescriptionMap));
     } else {
       return std::make_unique<MakeDummyProvenanceReader>();
     }
   }
 
   std::shared_ptr<ProductProvenanceRetriever> RootFile::makeProductProvenanceRetriever(unsigned int iStreamID) {
     if (eventProductProvenanceRetrievers_.size() <= iStreamID) {
       eventProductProvenanceRetrievers_.resize(iStreamID + 1);
     }
     if (!eventProductProvenanceRetrievers_[iStreamID]) {
       // propagate_const<T> has no reset() function
       eventProductProvenanceRetrievers_[iStreamID] = std::make_shared<ProductProvenanceRetriever>(
           iStreamID, provenanceReaderMaker_->makeReader(eventTree_, daqProvenanceHelper_.get()));
     }
     eventProductProvenanceRetrievers_[iStreamID]->reset();
     return eventProductProvenanceRetriever(iStreamID);
   }
 
   class ReducedProvenanceReader : public ProvenanceReaderBase {
   public:
     ReducedProvenanceReader(RootTree* iRootTree,
                             std::vector<ParentageID> const& iParentageIDLookup,
                             DaqProvenanceHelper const* daqProvenanceHelper);
 
     std::set<ProductProvenance> readProvenance(unsigned int) const override;
 
     void unsafe_fillProvenance(unsigned int) const override;
 
   private:
     void readProvenanceAsync(WaitingTaskHolder task,
                              ModuleCallingContext const* moduleCallingContext,
                              unsigned int transitionIndex,
                              std::atomic<const std::set<ProductProvenance>*>& writeTo) const noexcept override;
 
     edm::propagate_const<RootTree*> rootTree_;
     edm::propagate_const<TBranch*> provBranch_;
     StoredProductProvenanceVector provVector_;
     StoredProductProvenanceVector const* pProvVector_;
     std::vector<ParentageID> const& parentageIDLookup_;
     DaqProvenanceHelper const* daqProvenanceHelper_;
     std::shared_ptr<std::recursive_mutex> mutex_;
     SharedResourcesAcquirer acquirer_;
   };
 
   ReducedProvenanceReader::ReducedProvenanceReader(RootTree* iRootTree,
                                                    std::vector<ParentageID> const& iParentageIDLookup,
                                                    DaqProvenanceHelper const* daqProvenanceHelper)
       : ProvenanceReaderBase(),
         rootTree_(iRootTree),
         pProvVector_(&provVector_),
         parentageIDLookup_(iParentageIDLookup),
         daqProvenanceHelper_(daqProvenanceHelper),
         mutex_(SharedResourcesRegistry::instance()->createAcquirerForSourceDelayedReader().second),
         acquirer_(SharedResourcesRegistry::instance()->createAcquirerForSourceDelayedReader().first) {
     provBranch_ =
         rootTree_->tree()->GetBranch(BranchTypeToProductProvenanceBranchName(rootTree_->branchType()).c_str());
   }
 
   namespace {
     using SignalType = signalslot::Signal<void(StreamContext const&, ModuleCallingContext const&)>;
     template <typename R>
     void readProvenanceAsyncImpl(R const* iThis,
                                  SerialTaskQueueChain& chain,
                                  WaitingTaskHolder task,
                                  unsigned int transitionIndex,
                                  std::atomic<const std::set<ProductProvenance>*>& writeTo,
                                  ModuleCallingContext const* iContext,
                                  SignalType const* pre,
                                  SignalType const* post) {
       if (nullptr == writeTo.load()) {
         //need to be sure the task isn't run until after the read
         WaitingTaskHolder taskHolder{task};
         auto pWriteTo = &writeTo;
 
         auto serviceToken = ServiceRegistry::instance().presentToken();
 
         chain.push(
             *taskHolder.group(),
             [holder = std::move(taskHolder),
              pWriteTo,
              iThis,
              transitionIndex,
              iContext,
              pre,
              post,
              serviceToken]() mutable {
               if (nullptr == pWriteTo->load()) {
                 ServiceRegistry::Operate operate(serviceToken);
                 std::unique_ptr<const std::set<ProductProvenance>> prov;
                 try {
                   if (pre) {
                     pre->emit(*(iContext->getStreamContext()), *iContext);
                   }
                   prov = std::make_unique<const std::set<ProductProvenance>>(iThis->readProvenance(transitionIndex));
                   if (post) {
                     post->emit(*(iContext->getStreamContext()), *iContext);
                   }
 
                 } catch (...) {
                   if (post) {
                     post->emit(*(iContext->getStreamContext()), *iContext);
                   }
 
                   holder.doneWaiting(std::current_exception());
                   return;
                 }
                 const std::set<ProductProvenance>* expected = nullptr;
 
                 if (pWriteTo->compare_exchange_strong(expected, prov.get())) {
                   prov.release();
                 }
               }
               holder.doneWaiting(std::exception_ptr());
             });
       }
     }
   }  // namespace
 
   void ReducedProvenanceReader::readProvenanceAsync(
       WaitingTaskHolder task,
       ModuleCallingContext const* moduleCallingContext,
       unsigned int transitionIndex,
       std::atomic<const std::set<ProductProvenance>*>& writeTo) const noexcept {
     readProvenanceAsyncImpl(this,
                             acquirer_.serialQueueChain(),
                             task,
                             transitionIndex,
                             writeTo,
                             moduleCallingContext,
                             rootTree_->rootDelayedReader()->preEventReadFromSourceSignal(),
                             rootTree_->rootDelayedReader()->postEventReadFromSourceSignal());
   }
 
   //
   void ReducedProvenanceReader::unsafe_fillProvenance(unsigned int transitionIndex) const {
     ReducedProvenanceReader* me = const_cast<ReducedProvenanceReader*>(this);
     me->rootTree_->fillBranchEntry(
         me->provBranch_, me->rootTree_->entryNumberForIndex(transitionIndex), me->pProvVector_);
   }
 
   std::set<ProductProvenance> ReducedProvenanceReader::readProvenance(unsigned int transitionIndex) const {
     if (provVector_.empty()) {
       std::lock_guard<std::recursive_mutex> guard(*mutex_);
       ReducedProvenanceReader* me = const_cast<ReducedProvenanceReader*>(this);
       me->rootTree_->fillBranchEntry(
           me->provBranch_, me->rootTree_->entryNumberForIndex(transitionIndex), me->pProvVector_);
     }
     std::set<ProductProvenance> retValue;
     if (daqProvenanceHelper_) {
       for (auto const& prov : provVector_) {
         BranchID bid(prov.branchID_);
         retValue.emplace(daqProvenanceHelper_->mapBranchID(BranchID(prov.branchID_)),
                          daqProvenanceHelper_->mapParentageID(parentageIDLookup_[prov.parentageIDIndex_]));
       }
     } else {
       for (auto const& prov : provVector_) {
         if (prov.parentageIDIndex_ >= parentageIDLookup_.size()) {
           throw edm::Exception(errors::LogicError)
               << "ReducedProvenanceReader::ReadProvenance\n"
               << "The parentage ID index value " << prov.parentageIDIndex_
               << " is out of bounds.  The maximum value is " << parentageIDLookup_.size() - 1 << ".\n"
               << "This should never happen.\n"
               << "Please report this to the framework developers.";
         }
         retValue.emplace(BranchID(prov.branchID_), parentageIDLookup_[prov.parentageIDIndex_]);
       }
     }
     //The results of this call are cached by the caller
     const_cast<ReducedProvenanceReader*>(this)->provVector_.clear();
 
     return retValue;
   }
 
   class FullProvenanceReader : public ProvenanceReaderBase {
   public:
     explicit FullProvenanceReader(RootTree* rootTree, DaqProvenanceHelper const* daqProvenanceHelper);
     ~FullProvenanceReader() override {}
     std::set<ProductProvenance> readProvenance(unsigned int transitionIndex) const override;
 
   private:
     void readProvenanceAsync(WaitingTaskHolder task,
                              ModuleCallingContext const* moduleCallingContext,
                              unsigned int transitionIndex,
                              std::atomic<const std::set<ProductProvenance>*>& writeTo) const noexcept override;
 
     RootTree* rootTree_;
     ProductProvenanceVector infoVector_;
     //All access to a ROOT file is serialized
     CMS_SA_ALLOW mutable ProductProvenanceVector* pInfoVector_;
     DaqProvenanceHelper const* daqProvenanceHelper_;
     std::shared_ptr<std::recursive_mutex> mutex_;
     SharedResourcesAcquirer acquirer_;
   };
 
   FullProvenanceReader::FullProvenanceReader(RootTree* rootTree, DaqProvenanceHelper const* daqProvenanceHelper)
       : ProvenanceReaderBase(),
         rootTree_(rootTree),
         infoVector_(),
         pInfoVector_(&infoVector_),
         daqProvenanceHelper_(daqProvenanceHelper),
         mutex_(SharedResourcesRegistry::instance()->createAcquirerForSourceDelayedReader().second),
         acquirer_(SharedResourcesRegistry::instance()->createAcquirerForSourceDelayedReader().first) {}
 
   void FullProvenanceReader::readProvenanceAsync(
       WaitingTaskHolder task,
       ModuleCallingContext const* moduleCallingContext,
       unsigned int transitionIndex,
       std::atomic<const std::set<ProductProvenance>*>& writeTo) const noexcept {
     readProvenanceAsyncImpl(this,
                             acquirer_.serialQueueChain(),
                             task,
                             transitionIndex,
                             writeTo,
                             moduleCallingContext,
                             rootTree_->rootDelayedReader()->preEventReadFromSourceSignal(),
                             rootTree_->rootDelayedReader()->postEventReadFromSourceSignal());
   }
 
   std::set<ProductProvenance> FullProvenanceReader::readProvenance(unsigned int transitionIndex) const {
     {
       std::lock_guard<std::recursive_mutex> guard(*mutex_);
       rootTree_->fillBranchEntryMeta(
           rootTree_->branchEntryInfoBranch(), rootTree_->entryNumberForIndex(transitionIndex), pInfoVector_);
     }
     std::set<ProductProvenance> retValue;
     if (daqProvenanceHelper_) {
       for (auto const& info : infoVector_) {
         retValue.emplace(daqProvenanceHelper_->mapBranchID(info.branchID()),
                          daqProvenanceHelper_->mapParentageID(info.parentageID()));
       }
     } else {
       for (auto const& info : infoVector_) {
         retValue.emplace(info);
       }
     }
     return retValue;
   }
 
   class OldProvenanceReader : public ProvenanceReaderBase {
   public:
     explicit OldProvenanceReader(RootTree* rootTree,
                                  EntryDescriptionMap const& theMap,
                                  DaqProvenanceHelper const* daqProvenanceHelper);
     ~OldProvenanceReader() override {}
     std::set<ProductProvenance> readProvenance(unsigned int transitionIndex) const override;
 
   private:
     void readProvenanceAsync(WaitingTaskHolder task,
                              ModuleCallingContext const* moduleCallingContext,
                              unsigned int transitionIndex,
                              std::atomic<const std::set<ProductProvenance>*>& writeTo) const noexcept override;
 
     edm::propagate_const<RootTree*> rootTree_;
     std::vector<EventEntryInfo> infoVector_;
     //All access to ROOT file are serialized
     CMS_SA_ALLOW mutable std::vector<EventEntryInfo>* pInfoVector_;
     EntryDescriptionMap const& entryDescriptionMap_;
     DaqProvenanceHelper const* daqProvenanceHelper_;
     std::shared_ptr<std::recursive_mutex> mutex_;
     SharedResourcesAcquirer acquirer_;
   };
 
   OldProvenanceReader::OldProvenanceReader(RootTree* rootTree,
                                            EntryDescriptionMap const& theMap,
                                            DaqProvenanceHelper const* daqProvenanceHelper)
       : ProvenanceReaderBase(),
         rootTree_(rootTree),
         infoVector_(),
         pInfoVector_(&infoVector_),
         entryDescriptionMap_(theMap),
         daqProvenanceHelper_(daqProvenanceHelper),
         mutex_(SharedResourcesRegistry::instance()->createAcquirerForSourceDelayedReader().second),
         acquirer_(SharedResourcesRegistry::instance()->createAcquirerForSourceDelayedReader().first) {}
 
   void OldProvenanceReader::readProvenanceAsync(
       WaitingTaskHolder task,
       ModuleCallingContext const* moduleCallingContext,
       unsigned int transitionIndex,
       std::atomic<const std::set<ProductProvenance>*>& writeTo) const noexcept {
     readProvenanceAsyncImpl(this,
                             acquirer_.serialQueueChain(),
                             task,
                             transitionIndex,
                             writeTo,
                             moduleCallingContext,
                             rootTree_->rootDelayedReader()->preEventReadFromSourceSignal(),
                             rootTree_->rootDelayedReader()->postEventReadFromSourceSignal());
   }
 
   std::set<ProductProvenance> OldProvenanceReader::readProvenance(unsigned int transitionIndex) const {
     {
       std::lock_guard<std::recursive_mutex> guard(*mutex_);
       rootTree_->branchEntryInfoBranch()->SetAddress(&pInfoVector_);
       roottree::getEntry(rootTree_->branchEntryInfoBranch(), rootTree_->entryNumberForIndex(transitionIndex));
     }
     std::set<ProductProvenance> retValue;
     for (auto const& info : infoVector_) {
       EntryDescriptionMap::const_iterator iter = entryDescriptionMap_.find(info.entryDescriptionID());
       assert(iter != entryDescriptionMap_.end());
       Parentage parentage(iter->second.parents());
       if (daqProvenanceHelper_) {
         retValue.emplace(daqProvenanceHelper_->mapBranchID(info.branchID()),
                          daqProvenanceHelper_->mapParentageID(parentage.id()));
       } else {
         retValue.emplace(info.branchID(), parentage.id());
       }
     }
     return retValue;
   }
 
   class DummyProvenanceReader : public ProvenanceReaderBase {
   public:
     DummyProvenanceReader();
     ~DummyProvenanceReader() override {}
 
   private:
     std::set<ProductProvenance> readProvenance(unsigned int) const override;
     void readProvenanceAsync(WaitingTaskHolder task,
                              ModuleCallingContext const* moduleCallingContext,
                              unsigned int transitionIndex,
                              std::atomic<const std::set<ProductProvenance>*>& writeTo) const noexcept override;
   };
 
   DummyProvenanceReader::DummyProvenanceReader() : ProvenanceReaderBase() {}
 
   std::set<ProductProvenance> DummyProvenanceReader::readProvenance(unsigned int) const {
     // Not providing parentage!!!
     return std::set<ProductProvenance>{};
   }
   void DummyProvenanceReader::readProvenanceAsync(
       WaitingTaskHolder task,
       ModuleCallingContext const* moduleCallingContext,
       unsigned int transitionIndex,
       std::atomic<const std::set<ProductProvenance>*>& writeTo) const noexcept {
     if (nullptr == writeTo.load()) {
       auto emptyProv = std::make_unique<const std::set<ProductProvenance>>();
       const std::set<ProductProvenance>* expected = nullptr;
       if (writeTo.compare_exchange_strong(expected, emptyProv.get())) {
         emptyProv.release();
       }
     }
   }
 
   std::unique_ptr<ProvenanceReaderBase> MakeDummyProvenanceReader::makeReader(RootTree&,
                                                                               DaqProvenanceHelper const*) const {
     return std::make_unique<DummyProvenanceReader>();
   }
 
   std::unique_ptr<ProvenanceReaderBase> MakeOldProvenanceReader::makeReader(
       RootTree& rootTree, DaqProvenanceHelper const* daqProvenanceHelper) const {
     return std::make_unique<OldProvenanceReader>(&rootTree, *entryDescriptionMap_, daqProvenanceHelper);
   }
 
   std::unique_ptr<ProvenanceReaderBase> MakeFullProvenanceReader::makeReader(
       RootTree& rootTree, DaqProvenanceHelper const* daqProvenanceHelper) const {
     return std::make_unique<FullProvenanceReader>(&rootTree, daqProvenanceHelper);
   }
 
   std::unique_ptr<ProvenanceReaderBase> MakeReducedProvenanceReader::makeReader(
       RootTree& rootTree, DaqProvenanceHelper const* daqProvenanceHelper) const {
     return std::make_unique<ReducedProvenanceReader>(&rootTree, parentageIDLookup_, daqProvenanceHelper);
   }
 }  // namespace edm