AbstractLinAlgPack_MatrixWithOpConcreteEncap.hpp

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#ifndef MATRIX_WITH_OP_CONCRETE_ENCAP_H
#define MATRIX_WITH_OP_CONCRETE_ENCAP_H

#include "AbstractLinAlgPack_MatrixOp.hpp"

namespace AbstractLinAlgPack {

template<class M>
class MatrixWithOpConcreteEncap : public virtual MatrixOp
{
public:

  // /////////////////////////////////////////////////////

  MatrixWithOpConcreteEncap()
  {}

  MatrixWithOpConcreteEncap(const M& m) : m_(m)
  {}

  M& m() {
    return m_;
  }

  const M& m() const {
    return m_;
  }


  // /////////////////////////////////////////////////////
  // Overridden from Matrix

  size_type rows() const;

  size_type cols() const;

  // /////////////////////////////////////////////////////
  // Overridden from MatrixOp

  MatrixOp& operator=(const MatrixOp& m);

private:
  M m_;

};  // end class MatrixWithOpConcreteEncap<M>

// Template definitions

template<class M>
size_type MatrixWithOpConcreteEncap<M>::rows() const {
  return m().rows();
}

template<class M>
size_type MatrixWithOpConcreteEncap<M>::cols() const {
  return m().cols();
}

template<class M>
MatrixOp& MatrixWithOpConcreteEncap<M>::operator=(const MatrixOp& m) {
  if(&m == this) return *this;  // assignment to self
  const MatrixWithOpConcreteEncap<M> *p_m = dynamic_cast<const MatrixWithOpConcreteEncap<M>*>(&m);
  if(p_m) {
    m_ = p_m->m_;
  }
  else {
    throw std::invalid_argument("MatrixWithOpConcreteEncap<M>::operator=(const MatrixOp& m)"
      " : The concrete type of m is not a subclass of MatrixWithOpConcreteEncap<M> as expected" );
  }
  return *this;
}

} // end namespace AbstractLinAlgPack 

#endif  // MATRIX_WITH_OP_CONCRETE_ENCAP_H