error_evaluation.h

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//
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// Copyright (C) 2026 by the ryujin authors
//
 
#pragma once
 
#include <compile_time_options.h>
 
#include "mpi_ensemble.h"
#include "observer_pointer.h"
#include "offline_data.h"
#include "selected_components_extractor.h"
 
#include <deal.II/base/parameter_acceptor.h>
 
#include <ostream>
#include <string>
#include <vector>
 
namespace ryujin
{
  template <typename Description, int dim, typename Number = double>
  class ErrorEvaluation final : public dealii::ParameterAcceptor
  {
  public:
 
    using HyperbolicSystem = typename Description::HyperbolicSystem;
    using ParabolicSystem = typename Description::ParabolicSystem;
 
    using View = typename HyperbolicSystem::template View<dim, Number>;
 
    static constexpr auto problem_dimension = View::problem_dimension;
 
    using StateVector = typename View::StateVector;
    using InitialPrecomputedVector = typename View::InitialPrecomputedVector;
    using ScalarHostVector = Vectors::ScalarHostVector<Number>;
 
 
 
    ErrorEvaluation(const MPIEnsemble &mpi_ensemble,
                    const OfflineData<dim, Number> &offline_data,
                    const HyperbolicSystem &hyperbolic_system,
                    const ParabolicSystem &parabolic_system,
                    const InitialPrecomputedVector &initial_precomputed,
                    const std::string &subsection = "/ErrorEvaluation");
 
    void prepare(const std::string &name);
 
 
 
    std::vector<Number> compute(const StateVector &state_vector,
                                const StateVector &analytic) const;
 
    void write_out(const StateVector &state_vector,
                   const StateVector &analytic,
                   Number t) const;
 
    void print_summary(std::ostream &stream,
                       Number t,
                       dealii::types::global_dof_index n_global_dofs,
                       const std::vector<Number> &norms) const;
 
  private:
 
 
    std::vector<std::string> error_quantities_;
 
    bool error_normalize_;
 
    std::vector<std::string> error_norms_;
 
 
 
    const MPIEnsemble &mpi_ensemble_;
 
    dealii::ObserverPointer<const OfflineData<dim, Number>> offline_data_;
 
    SelectedComponentsExtractor<Description, dim, Number>
        selected_components_extractor_;
 
    std::string base_name_;
 
 
 
    std::string description() const;
 
  };
 
} /* namespace ryujin */