multiDimBucket.h

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 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
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#ifndef GUM_MULTIDIM_BUCKET_H
#define GUM_MULTIDIM_BUCKET_H
 
#include <climits>
#include <sstream>
 
#include <agrum/base/core/bijection.h>
#include <agrum/base/multidim/implementations/multiDimArray.h>
#include <agrum/base/multidim/implementations/multiDimReadOnly.h>
 
namespace gum {

 
  template < typename GUM_ELEMENT >
  class MultiDimBucket final: public MultiDimReadOnly< GUM_ELEMENT > {
    public:
    // ========================================================================
    // ========================================================================

    explicit MultiDimBucket(Size bufferSize = INT_MAX);

    MultiDimBucket(const MultiDimBucket< GUM_ELEMENT >& source);

    ~MultiDimBucket() override;

    // ========================================================================
    // ========================================================================

    void add(const MultiDimContainer< GUM_ELEMENT >& impl);

    void add(const MultiDimContainer< GUM_ELEMENT >* impl);

    void erase(const MultiDimContainer< GUM_ELEMENT >& impl);

    void erase(const MultiDimContainer< GUM_ELEMENT >* impl);

    bool contains(const MultiDimContainer< GUM_ELEMENT >& impl) const;

    const gum::VariableSet& allVariables() const;

    Size bucketSize() const;

    bool isBucketEmpty() const;

    bool bucketChanged() const;

    const MultiDimArray< GUM_ELEMENT >& bucket() const;

    Size bufferSize() const;

    void setBufferSize(Size amount);

    void compute(bool force = false) const;

    // ========================================================================
    // ========================================================================
 
    [[nodiscard]] MultiDimContainer< GUM_ELEMENT >* newFactory() const override;
 
    const std::string& name() const override;
 
    void add(const DiscreteVariable& v) override;
 
    void erase(const DiscreteVariable& v) override;
 
    Size realSize() const override;
 
    bool contains(const DiscreteVariable& v) const override;
 
    GUM_ELEMENT get(const Instantiation& i) const override;
 
    void changeNotification(const Instantiation&          i,
                            const DiscreteVariable* const var,
                            Idx                           oldval,
                            Idx                           newval) override;
 
    void setFirstNotification(const Instantiation& i) override;
 
    void setLastNotification(const Instantiation& i) override;
 
    void setIncNotification(const Instantiation& i) override;
 
    void setDecNotification(const Instantiation& i) override;
 
    void setChangeNotification(const Instantiation& i) override;
 
    bool registerSlave(Instantiation& i) override;
 
    bool unregisterSlave(Instantiation& i) override;
 
    MultiDimAdressable& getMasterRef() override;
 
    const MultiDimAdressable& getMasterRef() const override;
 
    std::string toString(const Instantiation* i) const override;


    const HashTable< const MultiDimContainer< GUM_ELEMENT >*, Instantiation* >& multidims() const;
 
    protected:
    void commitMultipleChanges_() override;

    GUM_ELEMENT& get_(const Instantiation& i) const override;
 
    void replace_(const DiscreteVariable* x, const DiscreteVariable* y) override;
 
    private:
    Size _bufferSize_;

    Bijection< Instantiation*, Instantiation* > _instantiations_;

    MultiDimArray< GUM_ELEMENT >* _bucket_;

    mutable HashTable< const MultiDimContainer< GUM_ELEMENT >*, Instantiation* > _multiDims_;

    gum::VariableSet _allVariables_;

    mutable Instantiation _allVarsInst_;

    void _addVariable_(const DiscreteVariable* var);

    void _eraseVariable_(const DiscreteVariable* var);

    void _initializeBuffer_();

    void _eraseBuffer_();

    GUM_ELEMENT _computeValue_(const Instantiation& value) const;

    mutable bool _changed_;

    mutable HashTable< const Instantiation*, GUM_ELEMENT > _slavesValue_;

    std::string _name_;
  };
 
 
#ifndef GUM_NO_EXTERN_TEMPLATE_CLASS
  extern template class MultiDimBucket< double >;
#endif
 
 
} /* namespace gum */
 
#include <agrum/base/multidim/implementations/multiDimBucket_tpl.h>
 
#endif /* GUM_MULTIDIM_BUCKET_H */