stub_parabolic_module.h

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//
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// Copyright (C) 2025 by the ryujin authors
//
 
#pragma once
 
#include <compile_time_options.h>
 
#include <hyperbolic_module.h>
#include <initial_values.h>
#include <mpi_ensemble.h>
#include <offline_data.h>
 
#include <deal.II/base/parameter_acceptor.h>
 
namespace ryujin
{
  template <typename Description, int dim, typename Number>
  class StubParabolicModule final : public dealii::ParameterAcceptor
  {
  public:
 
    using HyperbolicSystem = typename Description::HyperbolicSystem;
    using ParabolicSystem = typename Description::ParabolicSystem;
 
    using View = typename HyperbolicSystem::template View<dim, Number>;
 
    using StateVector = typename View::StateVector;
 
 
 
    StubParabolicModule(
        const MPIEnsemble & /*mpi_ensemble*/,
        const OfflineData<dim, Number> & /*offline_data*/,
        const HyperbolicSystem & /*hyperbolic_system*/,
        const ParabolicSystem & /*parabolic_system*/,
        const InitialValues<Description, dim, Number> & /*initial_values*/,
        const std::string &subsection = "StubParabolicModule")
        : ParameterAcceptor(subsection)
    {
    }
 
    void prepare()
    {
      // do nothing
    }
 
 
 
    void reinit_state_vector(StateVector & /*state_vector*/) const
    {
      // do nothing
    }
 
    void prepare_state_vector(StateVector & /*state_vector*/,
                              Number /*t*/) const
    {
      Assert(false,
             dealii::ExcMessage("The parabolic system is the identity. This "
                                "function should have never been called."));
    }
 
    template <int stages>
    void
    backward_euler_step(const StateVector &old_state_vector,
                        const Number /*old_t*/,
                        std::array<std::reference_wrapper<const StateVector>,
                                   stages> /*stage_state_vectors*/,
                        const std::array<Number, stages> /*stage_weights*/,
                        StateVector &new_state_vector,
                        Number /*tau*/) const
    {
      Assert(false,
             dealii::ExcMessage("The parabolic system is the identity. This "
                                "function should have never been called."));
 
      new_state_vector = old_state_vector;
    }
 
    void crank_nicolson_step(const StateVector &old_state_vector,
                             const Number /*old_t*/,
                             StateVector &new_state_vector,
                             Number /*tau*/) const
    {
      Assert(false,
             dealii::ExcMessage("The parabolic system is the identity. This "
                                "function should have never been called."));
 
      new_state_vector = old_state_vector;
    }
 
    void set_id_violation_strategy(
        const IDViolationStrategy & /*new_strategy*/) const
    {
      // do nothing
    }
 
 
 
    void print_solver_statistics(std::ostream & /*output*/) const
    {
      // do nothing
    }
 
    unsigned int n_restarts() const
    {
      return 0;
    }
 
    unsigned int n_corrections() const
    {
      return 0;
    }
 
    unsigned int n_warnings() const
    {
      return 0;
    }
 
  };
} /* namespace ryujin */