src/linkgraph/demands.h

   1 /** @file demands.h Declaration of demand calculating link graph handler. */
   2
   3 #ifndef DEMANDS_H
   4 #define DEMANDS_H
   5
   6 #include "linkgraphjob_base.h"
   7
   8 /**
   9  * Calculate the demands. This class has a state, but is recreated for each
  10  * call to of DemandHandler::Run.
  11  */
  12 class DemandCalculator {
  13 public:
  14         DemandCalculator(LinkGraphJob &job);
  15
  16 private:
  17         int32_t base_distance; ///< Base distance for scaling purposes.
  18         int32_t mod_dist;      ///< Distance modifier, determines how much demands decrease with distance.
  19         int32_t accuracy;      ///< Accuracy of the calculation.
  20
  21         template<class Tscaler>
  22         void CalcDemand(LinkGraphJob &job, Tscaler scaler);
  23 };
  24
  25 /**
  26  * Stateless, thread safe demand handler. Doesn't do anything but call DemandCalculator.
  27  */
  28 class DemandHandler : public ComponentHandler {
  29 public:
  30
  31         /**
  32          * Call the demand calculator on the given component.
  33          * @param job Component to calculate the demands for.
  34          */
  35         void Run(LinkGraphJob &job) const override { DemandCalculator c(job); }
  36
  37         /**
  38          * Virtual destructor has to be defined because of virtual Run().
  39          */
  40         virtual ~DemandHandler() = default;
  41 };
  42
  43 #endif /* DEMANDS_H */