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/*
// -*- C++ -*-
//
// Package: FWLite/DataFormats
// Class : Index
//
Description: <one line class summary>
Usage:
<usage>
*/
//
// Original Author: Bill Tanenbaum
//
// user include files
#include "DataFormats/FWLite/interface/EntryFinder.h"
#include "DataFormats/Provenance/interface/EventAuxiliary.h"
#include "FWCore/FWLite/interface/BranchMapReader.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "TBranch.h"
#include "TFile.h"
#include "TTree.h"
// forward declarations
namespace fwlite {
// This is a helper class for IndexIntoFile.
class FWLiteEventFinder : public edm::IndexIntoFile::EventFinder {
public:
explicit FWLiteEventFinder(TBranch* auxBranch) : auxBranch_(auxBranch) {}
~FWLiteEventFinder() override {}
edm::EventNumber_t getEventNumberOfEntry(edm::IndexIntoFile::EntryNumber_t entry) const override {
void* saveAddress = auxBranch_->GetAddress();
edm::EventAuxiliary eventAux;
edm::EventAuxiliary* pEvAux = &eventAux;
auxBranch_->SetAddress(&pEvAux);
auxBranch_->GetEntry(entry);
auxBranch_->SetAddress(saveAddress);
return eventAux.event();
}
private:
TBranch* auxBranch_;
};
EntryFinder::EntryFinder() : indexIntoFile_(), fileIndex_() {}
EntryFinder::~EntryFinder() {}
EntryFinder::EntryNumber_t EntryFinder::findEvent(edm::RunNumber_t const& run,
edm::LuminosityBlockNumber_t const& lumi,
edm::EventNumber_t const& event) const {
EntryFinder::EntryNumber_t ret = invalidEntry;
if (!indexIntoFile_.empty()) {
edm::IndexIntoFile::IndexIntoFileItr i = indexIntoFile_.findEventPosition(run, lumi, event);
if (indexIntoFile_.end(edm::IndexIntoFile::numericalOrder) != i) {
ret = i.entry();
}
} else {
edm::FileIndex::const_iterator i = fileIndex_.findEventPosition(run, lumi, event);
if (fileIndex_.end() != i) {
ret = i->entry_;
}
}
return ret;
}
EntryFinder::EntryNumber_t EntryFinder::findLumi(edm::RunNumber_t const& run,
edm::LuminosityBlockNumber_t const& lumi) const {
EntryFinder::EntryNumber_t ret = invalidEntry;
if (!indexIntoFile_.empty()) {
edm::IndexIntoFile::IndexIntoFileItr i = indexIntoFile_.findLumiPosition(run, lumi);
if (indexIntoFile_.end(edm::IndexIntoFile::numericalOrder) != i) {
ret = i.entry();
}
} else {
edm::FileIndex::const_iterator i = fileIndex_.findLumiPosition(run, lumi);
if (fileIndex_.end() != i) {
ret = i->entry_;
}
}
return ret;
}
EntryFinder::EntryNumber_t EntryFinder::findRun(edm::RunNumber_t const& run) const {
EntryFinder::EntryNumber_t ret = invalidEntry;
if (!indexIntoFile_.empty()) {
edm::IndexIntoFile::IndexIntoFileItr i = indexIntoFile_.findRunPosition(run);
if (indexIntoFile_.end(edm::IndexIntoFile::numericalOrder) != i) {
ret = i.entry();
}
} else {
edm::FileIndex::const_iterator i = fileIndex_.findRunPosition(run);
if (fileIndex_.end() != i) {
ret = i->entry_;
}
}
return ret;
}
void EntryFinder::fillIndex(BranchMapReader& branchMap) {
if (empty()) {
TTree* meta = dynamic_cast<TTree*>(branchMap.getFile()->Get(edm::poolNames::metaDataTreeName().c_str()));
if (nullptr == meta) {
throw cms::Exception("NoMetaTree")
<< "The TFile does not contain a TTree named " << edm::poolNames::metaDataTreeName();
}
if (meta->FindBranch(edm::poolNames::indexIntoFileBranchName().c_str()) != nullptr) {
edm::IndexIntoFile* indexPtr = &indexIntoFile_;
TBranch* b = meta->GetBranch(edm::poolNames::indexIntoFileBranchName().c_str());
b->SetAddress(&indexPtr);
b->GetEntry(0);
TTree* eventTree = branchMap.getEventTree();
TBranch* auxBranch = eventTree->GetBranch(edm::BranchTypeToAuxiliaryBranchName(edm::InEvent).c_str());
if (nullptr == auxBranch) {
throw cms::Exception("NoEventAuxilliary")
<< "The TTree " << edm::poolNames::eventTreeName() << " does not contain a branch named 'EventAuxiliary'";
}
indexIntoFile_.setNumberOfEvents(auxBranch->GetEntries());
indexIntoFile_.setEventFinder(
std::shared_ptr<edm::IndexIntoFile::EventFinder>(std::make_shared<FWLiteEventFinder>(auxBranch)));
} else if (meta->FindBranch(edm::poolNames::fileIndexBranchName().c_str()) != nullptr) {
edm::FileIndex* findexPtr = &fileIndex_;
TBranch* b = meta->GetBranch(edm::poolNames::fileIndexBranchName().c_str());
b->SetAddress(&findexPtr);
b->GetEntry(0);
} else {
// TBD: fill the FileIndex for old file formats (prior to CMSSW 2_0_0)
throw cms::Exception("NoIndexBranch")
<< "The TFile does not contain a TBranch named " << edm::poolNames::indexIntoFileBranchName().c_str()
<< " or " << edm::poolNames::fileIndexBranchName().c_str();
}
}
assert(!empty());
}
} // namespace fwlite
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