Panzer_FieldAggPattern.hpp

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// @HEADER
// *****************************************************************************
//           Panzer: A partial differential equation assembly
//       engine for strongly coupled complex multiphysics systems
//
// Copyright 2011 NTESS and the Panzer contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef __Panzer_FieldAggPattern_hpp__
#define __Panzer_FieldAggPattern_hpp__

#include "Panzer_FieldPattern.hpp"
#include "Panzer_FieldType.hpp"

#include <map>
#include <vector>
#include <tuple>

#include "Teuchos_RCP.hpp"
#include "Teuchos_Tuple.hpp"
#include "Phalanx_KokkosDeviceTypes.hpp"

namespace panzer {

class FieldAggPattern : public FieldPattern {
public:
   // The FEI format for prescribing fields seems quite general,
   // so it is my belief that an abstract can be written to it.

   FieldAggPattern();

   FieldAggPattern(std::vector<std::tuple<int,panzer::FieldType,Teuchos::RCP<const FieldPattern> > > & patterns,
                   const Teuchos::RCP<const FieldPattern> & geomAggPattern=Teuchos::null);

   virtual ~FieldAggPattern() {}

   virtual Teuchos::RCP<const FieldPattern> getGeometricAggFieldPattern() const;

   virtual void buildPattern(const std::vector<std::tuple<int,panzer::FieldType,Teuchos::RCP<const FieldPattern> > > & patterns,
                             const Teuchos::RCP<const FieldPattern> & geomAggPattern=Teuchos::null);

   // functions from the abstract FieldPattern
   virtual int getDimension() const;
   virtual int getSubcellCount(int dimension) const;
   virtual const std::vector<int> & getSubcellIndices(int dimension, int subcell) const;
   virtual void getSubcellClosureIndices(int, int, std::vector<int> &) const;
   virtual shards::CellTopology getCellTopology() const;

   virtual void print(std::ostream & os) const;

   virtual Teuchos::RCP<const FieldPattern> getFieldPattern(int fieldId) const;

   virtual FieldType getFieldType(int fieldId) const;



   const std::vector<int> & numFieldsPerId() const { return numFields_; }

   const std::vector<int> & fieldIds() const { return fieldIds_; }




   const std::vector<int> & localOffsets(int fieldId) const;

   const PHX::View<const int*> localOffsetsKokkos(int fieldId) const;
     
   const std::pair<std::vector<int>,std::vector<int> > &
   localOffsets_closure(int fieldId,int subcellDim,int subcellId) const;


protected:
   typedef Teuchos::RCP<const FieldPattern> FPPtr; // for convenience

   void buildFieldIdToPatternIdx();

   void buildFieldIdsVector();

   void mergeFieldPatterns(const FieldType& fieldType);

   void addAllPatternSubcellIndices(int dim,int sc,std::vector<int> & indices);

   void buildFieldPatternData();

   void localOffsets_build(int fieldId,std::vector<int> & offsets) const;
   
   std::size_t dimension_;
   Teuchos::RCP<const FieldPattern> geomAggPattern_;

   std::vector<std::vector<std::vector<int> > > patternData_;

   // FEI patterns
   std::vector<int> numFields_; // number of fields at each geometric ID
   std::vector<int> fieldIds_;  // field IDs at each geometric ID

   // storage for patterns
   std::vector<std::tuple<int,panzer::FieldType,Teuchos::RCP<const FieldPattern> > > patterns_;
   std::map<int,int> fieldIdToPatternIdx_;

   mutable std::map<int, std::vector<int> > fieldOffsets_;

   mutable std::map<int, PHX::View<int*> > fieldOffsetsKokkos_;

   struct LessThan  
   { bool operator()(const Teuchos::Tuple<int,3> & a,const Teuchos::Tuple<int,3> & b) const; };
   mutable std::map<Teuchos::Tuple<int,3>, std::pair<std::vector<int>,std::vector<int> >,LessThan>
         fieldSubcellOffsets_closure_;
};

}

#endif