CentralityProjection.hh

// -*- C++ -*-
#ifndef RIVET_CENTRALITYPROJECTION_HH
#define RIVET_CENTRALITYPROJECTION_HH
 
#include "Rivet/Projections/PercentileProjection.hh"
#include "Rivet/Tools/RivetYODA.hh"
#include <map>
 
namespace Rivet {
 

  class CentralityProjection : public SingleValueProjection {
  public:
 
    using SingleValueProjection::operator=;

    CentralityProjection() {
      setName("CentralityProjection");
    }
 
 
    RIVET_DEFAULT_PROJ_CLONE(CentralityProjection);
 

    using Projection::operator=;
 

    void add(const SingleValueProjection& p, string pname) {
      _projNames.push_back(pname);
      declare(p, pname);
    }

    void project(const Event& e) {
      _values.clear();
      for (string pname : _projNames) _values.push_back(apply<SingleValueProjection>(e, pname)());
      if (!_values.empty()) setValue(_values[0]);
    }

    bool empty() const {
      return _projNames.empty();
    }

    double operator[](int i) const {
      return _values[i];
    }
 
    // Standard comparison function.
    CmpState compare(const Projection& p) const {
      const CentralityProjection* other = dynamic_cast<const CentralityProjection*>(&p);
      if (other->_projNames.size() == 0) return CmpState::NEQ;
      // cholm: This is not enough.  The contained projections may be
      // different but have the same names.  We need to compare the
      // projections directly.
      for (string pname : _projNames) {
        auto& proj = getProjection(pname);
        bool hasPname = true;
        for (string p2name : other->_projNames) {
          if (pname != p2name) hasPname = false;
        }
        if (!hasPname) return CmpState::NEQ;
 
        auto& oth = other->getProjection(pname);
        if (proj.compare(oth) != CmpState::EQ) return CmpState::NEQ;
      }
      return CmpState::EQ;
    }

    vector<string> projections() const {
      return _projNames;
    }
 
 
  protected:

    vector<string> _projNames;

    vector<double> _values;
  };
 
 
}
 
#endif