SVDHistograms.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
#include <vxd/dataobjects/VxdID.h>
#include <vxd/geometry/GeoCache.h>
#include <vxd/geometry/SensorInfoBase.h>
#include <string>
#include <regex>
 
namespace Belle2 {

  template < class H > // H is an histogram
  class SVDHistograms: public TObject {
 
  public:
    SVDHistograms():
      SVDHistograms(H(), H(), H(), H()) {};  

    explicit SVDHistograms(const H& templateHisto):
      SVDHistograms(templateHisto, templateHisto,
                    templateHisto, templateHisto)
    {};

    SVDHistograms(const H& templateU3, const H& templateV3,
                  const H& templateU456, const H& templateV456);

    ~SVDHistograms() { clean(); };

    enum E_side { VIndex = 0, UIndex = 1 };

    H* getHistogram(const VxdID& vxdID, int view)
    {
      H* returnValue = m_defaultHistogram;
      try {
        auto& layer = m_histograms.at(vxdID.getLayerNumber());
        auto& ladder = layer.at(vxdID.getLadderNumber());
        auto& sensor = ladder.at(vxdID.getSensorNumber());
        returnValue = sensor.at(view);
      } catch (...) {
        B2WARNING("Unexpected VxdID /view. VxdID: " << (std::string)(vxdID)
                  << "  view : " << view);
 
        returnValue = m_defaultHistogram;
      }
 
      return returnValue;
    }
 
    // variable number of arguments for TH1 TH2...
    template< class ... Types>
    void fill(const VxdID& vxdID, int view, Types ... args)
    {
      getHistogram(vxdID, view)->Fill(args...);
    }
 
    // variable number of arguments for TH1 TH2...
    template< class ... Types>
    void fill(const VxdID& vxdID, bool isU, Types ... args)
    {
      int view = isU ? UIndex : VIndex;
      getHistogram(vxdID, view)->Fill(args...);
    }

    void customizeString(std::string& base, const VxdID& vxdID, bool isU)
    {
      std::string layer  = std::to_string(vxdID.getLayerNumber());
      std::string ladder = std::to_string(vxdID.getLadderNumber());
      std::string sensor = std::to_string(vxdID.getSensorNumber());
      std::string view = isU ? "U" : "V" ;
      base = std::regex_replace(base, std::regex("[@]layer"), layer);
      base = std::regex_replace(base, std::regex("[@]ladder"), ladder);
      base = std::regex_replace(base, std::regex("[@]sensor"), sensor);
      base = std::regex_replace(base, std::regex("[@]view"), view);
      std::string side = isU ? "P" : "N" ;
      base = std::regex_replace(base, std::regex("[@]side"), side);
    }

    void clean()
    {
 
      for (auto& layer : m_histograms)
        for (auto& ladder : layer)
          for (auto& sensor : ladder)
            for (auto& view : sensor)
              delete view;
    }

    void reset()
    {
      for (auto& layer : m_histograms)
        for (auto& ladder : layer)
          for (auto& sensor : ladder)
            for (auto& view : sensor)
              view->Reset();
    }
 
 
  private:
    // A t_SVDSensor is a vector of H that will have length 2.
    // Index 0 for the V side, index 1 for the U side
    // Please, please, pleaseeeee use SVDHistograms<...>::UIndex
    // and SVDHistograms<...>::VIndex instead of  1 and 0 for better
    // code readability
    typedef std::vector< H* > t_SVDSensor;  
 
    // A t_SVDLadder is a vector of t_SVDSensors
    typedef std::vector< t_SVDSensor > t_SVDLadder; 
 
    // A t_SVDLayer is a vector of t_SVDLAdders
    typedef std::vector< t_SVDLadder > t_SVDLayer; 
 
    // The t_SVD is a vector of t_SVDLayers
    typedef std::vector< t_SVDLayer > t_SVD; 
 
    t_SVD m_histograms; 
    H* m_defaultHistogram; 
 
 
    void customize(H& histogram, VxdID vxdID, int view); 
 
    ClassDef(SVDHistograms, 1);  
  };

  template <class H>
  SVDHistograms<H>::SVDHistograms(const H& templateU3, const H& templateV3,
                                  const H& templateU456, const H& templateV456)
  {
    m_defaultHistogram = new H(templateU3);
 
    VXD::GeoCache& geoCache = VXD::GeoCache::getInstance();
    for (auto layer : geoCache.getLayers(VXD::SensorInfoBase::SVD)) {
      unsigned int layerNumber = layer.getLayerNumber();
      if (m_histograms.size() <= layerNumber)
        m_histograms.resize(layerNumber + 1);
 
      for (auto ladder : geoCache.getLadders(layer)) {
        unsigned int ladderNumber = ladder.getLadderNumber();
        if (m_histograms[layerNumber].size() <= ladderNumber)
          m_histograms[layerNumber].resize(ladderNumber + 1);
 
        for (Belle2::VxdID sensor :  geoCache.getSensors(ladder)) {
          unsigned int sensorNumber = sensor.getSensorNumber();
          if (m_histograms[layerNumber][ladderNumber].size() <= sensorNumber)
            m_histograms[layerNumber][ladderNumber].resize(sensorNumber + 1);
          m_histograms[layerNumber][ladderNumber][sensorNumber].resize(2);
 
          for (int view = VIndex ; view < UIndex + 1; view++) {
            H h = layerNumber == 3 && view == UIndex ? templateU3 :
                  layerNumber == 3 && view == VIndex ? templateV3 :
                  view == UIndex ? templateU456 : templateV456 ;
            customize(h, sensor, view);
            m_histograms[layerNumber][ladderNumber][sensorNumber][view] = new H(h);
          }
        }
      }
    }
  }

  template < class H >
  void SVDHistograms<H>::customize(H& histogram, VxdID vxdID, int view)
  {
    bool isU = view == UIndex;
    std::string name = histogram.GetName();
    customizeString(name, vxdID, isU);
    histogram.SetName(name.c_str());
 
    std::string title = histogram.GetTitle();
    customizeString(title, vxdID, isU);
    histogram.SetTitle(title.c_str());
 
    std::string xAxis = histogram.GetXaxis()->GetTitle();
    customizeString(xAxis, vxdID, isU);
    histogram.SetXTitle(xAxis.c_str());
 
    std::string yAxis = histogram.GetYaxis()->GetTitle();
    customizeString(yAxis, vxdID, isU);
    histogram.SetYTitle(yAxis.c_str());
 
    std::string zAxis = histogram.GetZaxis()->GetTitle();
    customizeString(zAxis, vxdID, isU);
    histogram.SetZTitle(zAxis.c_str());
 
  }


}