ProblemStat.hpp

#pragma once

#include <tuple>
#include <string>
#include <memory>
#include <list>
#include <map>

#include <dune/istl/bcrsmatrix.hh>
#include <dune/istl/bvector.hh>
#include <dune/istl/matrix.hh>
#include <dune/istl/matrixindexset.hh>

#include <dune/grid/common/grid.hh>

#include "Basic.hpp"
#include "DirichletBC.hpp"
#include "FileWriter.hpp"
#include "Flag.hpp"
#include "Initfile.hpp"
#include "Operator.hpp"
#include "Preconditioner.hpp"
#include "ProblemStatBase.hpp"
#include "SystemMatrix.hpp"
#include "SystemVector.hpp"
#include "Timer.hpp"

namespace AMDiS {
    
    

template <class Traits>
class ProblemStat : public ProblemStatBase
{
public:
      
    using FeSpaces = typename Traits::FeSpaces;
    using Mesh     = typename Traits::Mesh;
    using MeshView = typename Mesh::LeafGridView;
    
    using Codim0   = typename MeshView::template Codim<0>;
    using Element  = typename Codim0::Entity;

    using ElementVector = Dune::BlockVector<Dune::FieldVector<double,1> >;
    using ElementMatrix = Dune::Matrix<Dune::FieldMatrix<double,1,1> >;
    
    
    /// Dimension of the mesh
    static constexpr int dim = Traits::dim;
    
    /// Dimension of the world
    static constexpr int dow = Traits::dimworld;
    
    /// Number of problem components
    static constexpr int nComponents = Traits::nComponents;
    
    
    template <size_t I>
    using FeSpace = std::tuple_element_t<I, FeSpaces>;
    
    using WorldVector = typename Codim0::Geometry::GlobalCoordinate;
    
    using SystemVectorType = SystemVector<FeSpaces>;
    using SystemMatrixType = SystemMatrix<FeSpaces>;
    
    using OperatorType = Operator<MeshView>;
    
public:
    /// \brief Constructor. Takes the name of the problem that is used to 
    /// access values correpsonding to this püroblem in the parameter file.
    /**
     * Parameters read by ProblemStatSeq, with name 'PROB'
     *   PROB->names:                  \ref componentNames
     **/
    ProblemStat(std::string name)
      : name(name)
    {
	Parameters::get(name + "->names", componentNames);
	for (int i = componentNames.size(); i < nComponents; ++i)
	    componentNames.push_back("solution_" + std::to_string(i));
    }
    
    
    /// \brief Initialisation of the problem.
    /**
     * Parameters read in initialize() for problem with name 'PROB'
     *   MESH[0]->global refinements:  nr of initial global refinements
     **/
    void initialize(Flag initFlag, 
		    ProblemStat* adoptProblem = NULL, 
		    Flag adoptFlag = INIT_NOTHING);
    

    /// Adds an operator to \ref A.
    void addMatrixOperator(OperatorType& op, 
			   int i, int j,
                           double* factor = NULL, double* estFactor = NULL);

    
    /// Adds an operator to \ref rhs.
    void addVectorOperator(OperatorType& op, int i,
                           double* factor = NULL, double* estFactor = NULL);
    

    /// Adds a Dirichlet boundary condition
    template <class Predicate, class Values>
    void addDirichletBC(Predicate const& predicate, 
			int row, int col, 
			Values const& values);

    
    /// Implementation of \ref ProblemStatBase::solve
    virtual void solve(AdaptInfo& adaptInfo, 
		       bool createMatrixData = true, 
		       bool storeMatrixData = false) override;
		       
    using BasePreconditioner = Dune::Preconditioner<typename SystemVectorType::MultiVector,
						    typename SystemVectorType::MultiVector>;
    virtual void solveAdvanced(AdaptInfo& adaptInfo, 
			       BasePreconditioner& precon);
    
		       
    /// Implementation of \ref ProblemStatBase::buildAfterCoarse
    virtual void buildAfterCoarsen(AdaptInfo& adaptInfo, 
				   Flag flag, 
				   bool asmMatrix = true, 
				   bool asmVector = true) override;
    

    /// Writes output files.
    void writeFiles(AdaptInfo& adaptInfo, double time = -1.0);
    

    /// Returns nr of components \ref nComponents
    static constexpr size_t getNumComponents()
    {
      return nComponents;
    }
    
    
    /// Return the I'th finite element space
    template <size_t I = 0>
    FeSpace<I> const& getFeSpace(const index_<I> = index_<I>()) const
    {
	return std::get<I>(*feSpaces);
    }
    
    
    std::shared_ptr<FeSpaces> getFeSpaces()
    {
	return feSpaces;
    }

    
    /// Return the mesh
    std::shared_ptr<Mesh> getMesh()
    {
	return mesh;
    }
    
    
    /// Return the i'th solution component
    template <size_t I = 0>
    decltype(auto) getSolution(const index_<I> _i = index_<I>())
    {
	return (*solution)[_i];
    }
    
    
    decltype(auto) getSolution()	{ return *solution; }
    decltype(auto) getSolution() const	{ return *solution; }
    
    decltype(auto) getSystemMatrix()	   { return *systemMatrix; }
    decltype(auto) getSystemMatrix() const { return *systemMatrix; }
    
    
    /// Return the name of the problem. Implementation of \ref ProblemStatBase::getName
    virtual std::string getName() const override
    {
      return name;
    }
    
public:
    // Reads a filename from the init file and creates the mesh object with 
    // respect to this file.
    void createMesh()
    {
	// TODO: Creation from meshname must be generalized to other meshes than AlbertaGrid.
	meshName = "";
	Parameters::get(name + "->mesh", meshName);
	AMDIS_TEST_EXIT(!meshName.empty(),
	    "No mesh name specified for '" << name << "->mesh'!");
	
	std::string macro_filename = "";
	Parameters::get(meshName + "->macro file name", macro_filename);

	mesh = std::make_shared<Mesh>(macro_filename);
	meshView = std::make_shared<MeshView>(mesh->leafGridView());
    }
    
    //
    void createFeSpaces()
    {
	feSpaces = std::make_shared<FeSpaces>(construct_tuple<FeSpaces>(*meshView));
	
	systemMatrix = std::make_shared<SystemMatrixType>(*feSpaces);
	solution = std::make_shared<SystemVectorType>(*feSpaces, componentNames);
	rhs = std::make_shared<SystemVectorType>(*feSpaces, std::vector<std::string>(nComponents, "rhs"));
    }
    
    //
    template <class RowBasis, class ColBasis>
    void getOccupationPattern(const RowBasis& rowBasis, 
			      const ColBasis& colBasis, 
			      Dune::MatrixIndexSet& nb);
    
    //
    template <class RowView, class ColView>
    bool getElementMatrix(RowView const& rowView,
			  ColView const& colView,
			  ElementMatrix& elementMatrix,
			  std::list<std::shared_ptr<OperatorType>>& operators);
    
    //
    template <class RowView>
    bool getElementVector(RowView const& rowView,
			  ElementVector& elementVector,
			  std::list<std::shared_ptr<OperatorType>>& operators);
    
    
    template <class Matrix, class RowIndexSet, class ColIndexSet>
    void addElementMatrix(Matrix& matrix,
			  RowIndexSet const& rowIndexSet,
			  ColIndexSet const& colIndexSet,
			  ElementMatrix const& elementMatrix);
    
    template <class Vector, class IndexSet>
    void addElementVector(Vector& vector,
			  IndexSet const& indexSet,
			  ElementVector const& elementvector);
    
    //
    template <class RowBasis, class ColBasis, class Matrix, class Vector>
    void assemble(std::pair<int, int> row_col,
		  const RowBasis& rowBasis, 
		  const ColBasis& colBasis, 
		  Matrix* matrix,
		  Vector* rhs);
    
private:
    template <size_t I = 0>
    typename FeSpace<I>::NodeFactory& 
    getNodeFactory(const index_<I> = index_<I>())
    {
	return const_cast<typename FeSpace<I>::NodeFactory&>(std::get<I>(*feSpaces).nodeFactory());
    }
    
private:
    /// Name of this problem.
    std::string name;

    /// Stores the names for all components. Is used for naming the solution
    /// vectors, \ref solution.
    std::vector<std::string> componentNames;
    
    /// Mesh of this problem.
    // TODO: generalize to multi-mesh problems
    std::shared_ptr<Mesh> mesh;
    std::string meshName;
    
    ///
    std::shared_ptr<MeshView> meshView;
    
    /// Pointer to the meshes for the different problem components
    std::vector<Mesh*> componentMeshes;
    
    /// FE spaces of this problem.
    std::shared_ptr<FeSpaces> feSpaces; // eventuell const
    
    std::shared_ptr<FileWriter<Traits>> filewriter;
    
    std::shared_ptr<SystemMatrixType> systemMatrix;
    std::shared_ptr<SystemVectorType> solution;
    std::shared_ptr<SystemVectorType> rhs;
    
    IdxPairList<DirichletBC<WorldVector>>	dirichletBc;
    IdxPairList<OperatorType>			matrixOperators;
    IdxList<OperatorType>			vectorOperators;
};
  
  
#ifndef AMDIS_NO_EXTERN_PROBLEMSTAT
//   extern template class ProblemStat<ProblemStatTraits<1>>;
  extern template class ProblemStat<ProblemStatTraits<2,2,1>>;
  extern template class ProblemStat<ProblemStatTraits<2,2,2>>;
//   extern template class ProblemStat<ProblemStatTraits<3>>;
#endif
  
}

#include "ProblemStat.inc.hpp"