SymPermutation.hh

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#ifndef SYMPERMUTATION_HH
#define SYMPERMUTATION_HH

#include <iostream>
#include <cmath>
#include "casm/symmetry/SymOpRepresentation.hh"
#include "casm/container/Permutation.hh"

namespace CASM {
  class MasterSymGroup;
  class Lattice;

  class SymPermutation: public SymOpRepresentation {
  public:
    SymPermutation(const Array<Index> &init_permute) : m_permute(init_permute), m_has_mat(false) {

    }

    SymPermutation(const Permutation &init_permute) : m_permute(init_permute), m_has_mat(false) {

    }

    double character() const override;

    SymOpRepresentation *copy() const override {
      return new SymPermutation(*this);
    }

    Permutation const *get_permutation() const override {
      return &m_permute;
    }

    Eigen::MatrixXd const *get_MatrixXd() const override {
      if(!m_has_mat)
        _calc_mat();
      return &m_mat;
    }

    jsonParser &to_json(jsonParser &json) const override;

    void from_json(const jsonParser &json) override;

  private:
    Permutation m_permute;

    // true if m_mat is initialized
    bool m_has_mat;

    mutable Eigen::MatrixXd m_mat;

    void _calc_mat() const;

  };

  jsonParser &to_json(const SymPermutation &sym, jsonParser &json);
  void from_json(SymPermutation &sym, const jsonParser &json);

}
#endif