SIOVPmtGainProvider.h

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#ifndef SIOVPMTGAINPROVIDER_H
#define SIOVPMTGAINPROVIDER_H

#include "DatabaseRetrievalAlg.h"
#include "larevt/CalibrationDBI/IOVData/IOVDataConstants.h"
#include "larevt/CalibrationDBI/IOVData/PmtGain.h"
#include "larevt/CalibrationDBI/IOVData/Snapshot.h"
#include "larevt/CalibrationDBI/Interface/PmtGainProvider.h"

namespace lariov {

  class SIOVPmtGainProvider : public DatabaseRetrievalAlg, public PmtGainProvider {

  public:
    SIOVPmtGainProvider(fhicl::ParameterSet const& p);

    void Reconfigure(fhicl::ParameterSet const& p) override;

    void UpdateTimeStamp(DBTimeStamp_t ts);

    bool Update(DBTimeStamp_t ts);

    const PmtGain& PmtGainObject(DBChannelID_t ch) const;
    float Gain(DBChannelID_t ch) const override;
    float GainErr(DBChannelID_t ch) const override;
    CalibrationExtraInfo const& ExtraInfo(DBChannelID_t ch) const override;

  private:

    bool DBUpdate() const; // Uses current event time.
    bool DBUpdate(DBTimeStamp_t ts) const;

    // Time stamps.

    DBTimeStamp_t fEventTimeStamp;           // Most recently seen time stamp.
    mutable DBTimeStamp_t fCurrentTimeStamp; // Time stamp of cached data.

    DataSource::ds fDataSource;

    mutable Snapshot<PmtGain> fData;
  };
} //end namespace lariov

#endif