MueLu_AmalgamationInfo_decl.hpp

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/*
 * MueLu_AmalgamationInfo_decl.hpp
 *
 *  Created on: Mar 28, 2012
 *      Author: wiesner
 */

#ifndef MUELU_AMALGAMATIONINFO_DECL_HPP_
#define MUELU_AMALGAMATIONINFO_DECL_HPP_

#include <Xpetra_ConfigDefs.hpp>   // global_size_t
#include <Xpetra_Map_fwd.hpp>
#include <Xpetra_MapFactory_fwd.hpp>
#include <Xpetra_Vector_fwd.hpp>

#include "MueLu_ConfigDefs.hpp"

#include "MueLu_BaseClass.hpp"

#include "MueLu_AmalgamationInfo_fwd.hpp"
#include "MueLu_Aggregates_fwd.hpp"

namespace MueLu {

  template<class LocalOrdinal = DefaultLocalOrdinal,
           class GlobalOrdinal = DefaultGlobalOrdinal,
           class Node = DefaultNode>
  class AmalgamationInfo
    : public BaseClass {
#undef MUELU_AMALGAMATIONINFO_SHORT
#include "MueLu_UseShortNamesOrdinal.hpp"

  public:

    AmalgamationInfo(RCP<Array<LO> > rowTranslation,
                     RCP<Array<LO> > colTranslation,
                     RCP<const Map> nodeRowMap,
                     RCP<const Map> nodeColMap,
                     RCP< const Xpetra::Map<LocalOrdinal, GlobalOrdinal, Node> > const &columnMap,
                     LO fullblocksize, GO offset, LO blockid, LO nStridedOffset, LO stridedblocksize) :
                     rowTranslation_(rowTranslation),
                     colTranslation_(colTranslation),
                     nodeRowMap_(nodeRowMap),
                     nodeColMap_(nodeColMap),
                     columnMap_(columnMap),
                     fullblocksize_(fullblocksize),
                     offset_(offset),
                     blockid_(blockid),
                     nStridedOffset_(nStridedOffset),
                     stridedblocksize_(stridedblocksize),
                     indexBase_(columnMap->getIndexBase())
    {}

    virtual ~AmalgamationInfo() {}

    std::string description() const { return "AmalgamationInfo"; }

    //using MueLu::Describable::describe; // overloading, not hiding
    //void describe(Teuchos::FancyOStream &out, const VerbLevel verbLevel = Default) const;;
    void print(Teuchos::FancyOStream &out, const VerbLevel verbLevel = Default) const;

    RCP<const Map> getNodeRowMap() const { return nodeRowMap_; } 
    RCP<const Map> getNodeColMap() const { return nodeColMap_; } 

    /* @brief Translation arrays
     *
     * Returns translation arrays providing local node ids given local dof ids built from either
     * the non-overlapping (unique) row map or the overlapping (non-unique) column map.
     * The getColTranslation routine, e.g., is used for the MergeRows routine in CoalesceDropFactory.
     */
    RCP<Array<LO> > getRowTranslation() const { return rowTranslation_; }
    RCP<Array<LO> > getColTranslation() const { return colTranslation_; }

    void UnamalgamateAggregates(const Aggregates& aggregates, Teuchos::ArrayRCP<LocalOrdinal>& aggStart, Teuchos::ArrayRCP<GlobalOrdinal>& aggToRowMap) const;
    void UnamalgamateAggregatesLO(const Aggregates& aggregates, Teuchos::ArrayRCP<LocalOrdinal>& aggStart, Teuchos::ArrayRCP<LO>& aggToRowMap) const;

    Teuchos::RCP< Xpetra::Map<LocalOrdinal, GlobalOrdinal, Node> > ComputeUnamalgamatedImportDofMap(const Aggregates& aggregates) const;

    GO ComputeGlobalDOF(GO const &gNodeID, LO const &k=0) const;

    GO GlobalOffset() { return offset_; }

    void GetStridingInformation(LO& fullBlockSize, LO& blockID, LO& stridingOffset, LO& stridedBlockSize, GO& indexBase) {
      fullBlockSize = fullblocksize_;
      blockID = blockid_;
      stridingOffset = nStridedOffset_;
      stridedBlockSize = stridedblocksize_;
      indexBase = indexBase_;
    }

  private:



    // arrays containing local node ids given local dof ids
    RCP<Array<LO> > rowTranslation_;
    RCP<Array<LO> > colTranslation_;

    // node row and column map of graph (built from row and column map of A)
    RCP<const Map> nodeRowMap_;
    RCP<const Map> nodeColMap_;

    // keep an RCP on the column map to make sure that the map is still valid when it is used
    Teuchos::RCP< const Xpetra::Map<LocalOrdinal, GlobalOrdinal, Node> > columnMap_;



    LO fullblocksize_;
    GO offset_;
    LO blockid_;
    LO nStridedOffset_;
    LO stridedblocksize_;
    GO indexBase_;

  };

} // namespace MueLu

#define MUELU_AMALGAMATIONINFO_SHORT
#endif /* MUELU_AMALGAMATIONINFO_DECL_HPP_ */