MueLu_SmootherBase.hpp

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#ifndef MUELU_SMOOTHERBASE_HPP
#define MUELU_SMOOTHERBASE_HPP

#include "Xpetra_MultiVector.hpp"

#include "MueLu_ConfigDefs.hpp"
#include "MueLu_BaseClass.hpp"

namespace MueLu {
  template <class Scalar = DefaultScalar,
            class LocalOrdinal = DefaultLocalOrdinal,
            class GlobalOrdinal = DefaultGlobalOrdinal,
            class Node = DefaultNode>
  class SmootherBase : public virtual BaseClass {
  public:
    typedef Scalar scalar_type;
    typedef LocalOrdinal local_ordinal_type;
    typedef GlobalOrdinal global_ordinal_type;
    typedef Node node_type;

  private:

#undef MUELU_SMOOTHERBASE_SHORT
#include "MueLu_UseShortNames.hpp"

  public:
    SmootherBase() {}

    virtual ~SmootherBase() {}



    virtual void Apply(MultiVector& x, const MultiVector& rhs, bool InitialGuessIsZero = false) const = 0;

    virtual size_t getNodeSmootherComplexity() const= 0;

    void declareConstructionOutcome(bool fail, std::string msg) {
      constructionSuccessful_ = !fail;
      if (!fail)
        constructionErrorMsg_ = "";
      else
        constructionErrorMsg_ = msg;
    };
    bool constructionSuccessful() { return constructionSuccessful_; }
    std::string constructionErrorMsg() { return constructionErrorMsg_; }


  private:
    bool constructionSuccessful_;
    std::string constructionErrorMsg_;

  }; //class SmootherBase
} //namespace MueLu

#define MUELU_SMOOTHERBASE_SHORT

#endif //ifndef MUELU_SMOOTHERBASE_HPP

// SmootherBase = Interface used by Hierarchy.Iterate(). Minimal condition to be used as smoother.
// SmootherPrototype = minimal interface used by the generic SmootherFactory.
// Note that one can implements and use his own SmootherFactory. In this case, SmootherBase is enough.
// AdvSmootherPrototype = for more complex case of reusing setup between presmoother and postsmoother