RootPrimaryFileSequence.h

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#ifndef IOPool_Input_RootPrimaryFileSequence_h
#define IOPool_Input_RootPrimaryFileSequence_h

/*----------------------------------------------------------------------

RootPrimaryFileSequence: This is an InputSource

----------------------------------------------------------------------*/

#include "RootInputFileSequence.h"
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/InputSource.h"
#include "FWCore/Framework/interface/ProductSelectorRules.h"
#include "FWCore/Framework/interface/ProcessingController.h"
#include "FWCore/Sources/interface/EventSkipperByID.h"
#include "FWCore/Utilities/interface/get_underlying_safe.h"
#include "DataFormats/Provenance/interface/BranchDescription.h"
#include "DataFormats/Provenance/interface/ProcessHistoryID.h"

#include <memory>
#include <string>
#include <vector>

namespace edm {

  class BranchID;
  class DuplicateChecker;
  class FileCatalogItem;
  class InputFileCatalog;
  class ParameterSetDescription;
  class PoolSource;
  class RootFile;

  class RootPrimaryFileSequence : public RootInputFileSequence {
  public:
    explicit RootPrimaryFileSequence(ParameterSet const& pset, PoolSource& input, InputFileCatalog const& catalog);
    ~RootPrimaryFileSequence() override;

    RootPrimaryFileSequence(RootPrimaryFileSequence const&) = delete;             // Disallow copying and moving
    RootPrimaryFileSequence& operator=(RootPrimaryFileSequence const&) = delete;  // Disallow copying and moving

    std::unique_ptr<FileBlock> readFile_();
    void closeFile_() override;
    void endJob();
    InputSource::ItemType getNextItemType(RunNumber_t& run, LuminosityBlockNumber_t& lumi, EventNumber_t& event);
    bool skipEvents(int offset);
    bool goToEvent(EventID const& eventID);
    void rewind_();
    static void fillDescription(ParameterSetDescription& desc);
    ProcessingController::ForwardState forwardState() const;
    ProcessingController::ReverseState reverseState() const;

  private:
    void initFile_(bool skipBadFiles) override;
    RootFileSharedPtr makeRootFile(std::shared_ptr<InputFile> filePtr) override;
    bool nextFile();
    bool previousFile();
    void rewindFile();

    int remainingEvents() const;
    int remainingLuminosityBlocks() const;

    PoolSource& input_;
    bool firstFile_;
    BranchDescription::MatchMode branchesMustMatch_;
    std::vector<ProcessHistoryID> orderedProcessHistoryIDs_;

    std::shared_ptr<EventSkipperByID const> eventSkipperByID() const { return get_underlying_safe(eventSkipperByID_); }
    std::shared_ptr<EventSkipperByID>& eventSkipperByID() { return get_underlying_safe(eventSkipperByID_); }
    std::shared_ptr<DuplicateChecker const> duplicateChecker() const { return get_underlying_safe(duplicateChecker_); }
    std::shared_ptr<DuplicateChecker>& duplicateChecker() { return get_underlying_safe(duplicateChecker_); }

    edm::propagate_const<std::shared_ptr<EventSkipperByID>> eventSkipperByID_;
    int initialNumberOfEventsToSkip_;
    bool noEventSort_;
    unsigned int treeCacheSize_;
    edm::propagate_const<std::shared_ptr<DuplicateChecker>> duplicateChecker_;
    bool usingGoToEvent_;
    bool enablePrefetching_;
  };  // class RootPrimaryFileSequence
}  // namespace edm
#endif