multiDimAggregator.h

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 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
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#ifndef GUM_MULTI_DIM_AGGREGATOR_H
#define GUM_MULTI_DIM_AGGREGATOR_H
 
#include <agrum/base/multidim/implementations/multiDimReadOnly.h>
 
namespace gum {
  namespace aggregator {
    // =========================================================================
    // ===                       GUM_MULTI_DIM_AGGREGATOR                    ===
    // =========================================================================

    template < typename GUM_SCALAR >
    class MultiDimAggregator: public MultiDimReadOnly< GUM_SCALAR > {
      public:
      // =======================================================================
      // =======================================================================

      MultiDimAggregator();

      MultiDimAggregator(const MultiDimAggregator< GUM_SCALAR >& from);

      virtual ~MultiDimAggregator();


      virtual MultiDimContainer< GUM_SCALAR >* newFactory() const override = 0;
 
      // =======================================================================
      // =======================================================================
 
      public:
      virtual GUM_SCALAR get(const Instantiation& i) const override;
 
      virtual std::string aggregatorName() const = 0;
      std::string         toString() const override;
 
      void changeNotification(const gum::Instantiation&,
                              const gum::DiscreteVariable* const,
                              gum::Idx,
                              gum::Idx) override {};
 
      void setFirstNotification(const gum::Instantiation&) override {};
 
      void setLastNotification(const gum::Instantiation&) override {};
 
      void setIncNotification(const gum::Instantiation&) override {};
 
      void setDecNotification(const gum::Instantiation&) override {};
 
      void setChangeNotification(const gum::Instantiation&) override {};
 
      std::string toString(const gum::Instantiation* i) const override { return i->toString(); };

      Size realSize() const override { return 0; };

      const std::string& name() const override;

      void copyFrom(const MultiDimContainer< GUM_SCALAR >& src) const override;

      bool isDecomposable() const;

 
      protected:
      virtual Idx buildValue_(const gum::Instantiation& i) const;

      bool decomposable_;

      virtual Idx neutralElt_() const = 0;

      virtual Idx fold_(const DiscreteVariable& v, Idx i1, Idx i2, bool& stop_iteration) const = 0;
    };
 
 
#ifndef GUM_NO_EXTERN_TEMPLATE_CLASS
    extern template class MultiDimAggregator< double >;
#endif

    template < typename GUM_SCALAR >
    std::ostream& operator<<(std::ostream& s, const MultiDimAggregator< GUM_SCALAR >& ag);
 
  } /* namespace aggregator */
} /* namespace gum */
 
#include <agrum/base/multidim/aggregators/multiDimAggregator_tpl.h>
 
#endif /* GUM_MULTI_DIM_AGGREGATOR_H */