AbsPlan1RechitCombiner.h

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#ifndef RecoLocalCalo_HcalRecAlgos_AbsPlan1RechitCombiner_h_
#define RecoLocalCalo_HcalRecAlgos_AbsPlan1RechitCombiner_h_

#include <utility>

#include "DataFormats/HcalRecHit/interface/HcalRecHitCollections.h"

class HcalTopology;

class AbsPlan1RechitCombiner
{
public:
    inline virtual ~AbsPlan1RechitCombiner() {}

    // The topology should be set before the first call
    // to "add" and whenever it changes
    virtual void setTopo(const HcalTopology* topo) = 0;

    // The "clear" function is called once per event,
    // at the beginning of the rechit processing
    virtual void clear() = 0;

    // This method should be called to add a rechit to process.
    // It will be assumed that the rechit reference will remain
    // valid at the time "combine" method is called.
    virtual void add(const HBHERecHit& rh) = 0;

    // This method should be called once per event,
    // after all rechits have been added
    virtual void combine(HBHERecHitCollection* collectionToFill) = 0;

protected:
    // The first element of the pair is the value to average
    // and the second is the weight (energy). Non-positive weights
    // will be ignored.
    typedef std::pair<float, float> FPair;

    static float energyWeightedAverage(const FPair* data, unsigned len,
                                       float valueToReturnOnFailure);
};

#endif // RecoLocalCalo_HcalRecAlgos_AbsPlan1RechitCombiner_h_