ProblemOperatorInterface.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#ifdef MFEM_ENABLED

#pragma once
#include "MFEMProblemData.h"

namespace Moose::MFEM
{
class ProblemOperatorInterface
{
public:
  ProblemOperatorInterface(MFEMProblemData & problem) : _problem(problem) {}
  virtual ~ProblemOperatorInterface() = default;

  virtual void SetGridFunctions();
  virtual void SetTestVariablesFromTrueVectors();
  virtual void SetTrialVariablesFromTrueVectors();
  virtual void Init(mfem::BlockVector & X);

  mfem::Array<int> _block_true_offsets;

  mfem::BlockVector _true_x, _true_rhs;
  mfem::OperatorHandle _equation_system_operator;

protected:
  // Reference to the current problem.
  MFEMProblemData & _problem;

  // Vector of names of state gridfunctions used in formulation, ordered by appearance in block
  // vector during solve.
  std::vector<std::string> _test_var_names;
  std::vector<mfem::ParGridFunction *> _test_variables;

  // Vector of names of state gridfunctions used in formulation, ordered by appearance in block
  // vector during solve.
  std::vector<std::string> _trial_var_names;
  std::vector<mfem::ParGridFunction *> _trial_variables;
};
}

#endif