AnasaziTsqrOrthoManager.hpp

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#ifndef __AnasaziTsqrOrthoManager_hpp
#define __AnasaziTsqrOrthoManager_hpp

#include "AnasaziTsqrOrthoManagerImpl.hpp"
#include "AnasaziSVQBOrthoManager.hpp"


namespace Anasazi {

  template<class Scalar, class MV>
  class OutOfPlaceNormalizerMixin {
  public:
    typedef Scalar scalar_type;
    typedef typename Teuchos::ScalarTraits<Scalar>::magnitudeType magnitude_type;
    typedef MV multivector_type;

    typedef Teuchos::SerialDenseMatrix<int, Scalar> mat_type;
    typedef Teuchos::RCP<mat_type>                  mat_ptr;

    virtual int 
    normalizeOutOfPlace (MV& X, MV& Q, mat_ptr B) const = 0;

    virtual int 
    projectAndNormalizeOutOfPlace (MV& X_in, 
           MV& X_out, 
           Teuchos::Array<mat_ptr> C,
           mat_ptr B,
           Teuchos::ArrayView<Teuchos::RCP<const MV> > Q) const = 0;

    virtual ~OutOfPlaceNormalizerMixin () {}
  };

  template<class Scalar, class MV>
  class TsqrOrthoManager : 
    public OrthoManager<Scalar, MV>, 
    public OutOfPlaceNormalizerMixin<Scalar, MV>,
    public Teuchos::ParameterListAcceptor
  {
  public:
    typedef Scalar scalar_type;
    typedef typename Teuchos::ScalarTraits<Scalar>::magnitudeType magnitude_type;
    typedef MV multivector_type;

    typedef Teuchos::SerialDenseMatrix<int, Scalar> mat_type;
    typedef Teuchos::RCP<mat_type>                  mat_ptr;

    void setParameterList (const Teuchos::RCP<Teuchos::ParameterList>& params) {
      impl_.setParameterList (params);
    }

    Teuchos::RCP<Teuchos::ParameterList> getNonconstParameterList () {
      return impl_.getNonconstParameterList ();
    }

    Teuchos::RCP<Teuchos::ParameterList> unsetParameterList () {
      return impl_.unsetParameterList ();
    }

    Teuchos::RCP<const Teuchos::ParameterList> getValidParameters() const {
      return impl_.getValidParameters();
    }

    Teuchos::RCP<const Teuchos::ParameterList> getFastParameters() const {
      return impl_.getFastParameters();
    }

    TsqrOrthoManager (const Teuchos::RCP<Teuchos::ParameterList>& params, 
          const std::string& label = "Anasazi") :
      impl_ (params, label)
    {}

    TsqrOrthoManager (const std::string& label) :
      impl_ (label)
    {}

    virtual ~TsqrOrthoManager() {}

    void innerProd (const MV &X, const MV& Y, mat_type& Z) const {
      return impl_.innerProd (X, Y, Z);
    }

    void norm (const MV& X, std::vector<magnitude_type>& normVec) const {
      return impl_.norm (X, normVec);
    }

    void 
    project (MV &X, 
       Teuchos::Array<Teuchos::RCP<const MV> > Q,
       Teuchos::Array<Teuchos::RCP<Teuchos::SerialDenseMatrix<int,Scalar> > > C 
       = Teuchos::tuple(Teuchos::RCP< Teuchos::SerialDenseMatrix<int,Scalar> >(Teuchos::null))) const
    {
      return impl_.project (X, C, Q);
    }

    int 
    normalize (MV &X, mat_ptr B = Teuchos::null) const
    {
      return impl_.normalize (X, B);
    }

    int 
    projectAndNormalize (MV &X, 
       Teuchos::Array<Teuchos::RCP<const MV> > Q,
       Teuchos::Array<Teuchos::RCP<Teuchos::SerialDenseMatrix<int,Scalar> > > C 
       = Teuchos::tuple(Teuchos::RCP< Teuchos::SerialDenseMatrix<int,Scalar> >(Teuchos::null)),
       Teuchos::RCP<Teuchos::SerialDenseMatrix<int,Scalar> > B = Teuchos::null) const
    {
      return impl_.projectAndNormalize (X, C, B, Q);
    }

    int 
    normalizeOutOfPlace (MV& X, MV& Q, mat_ptr B) const
    {
      return impl_.normalizeOutOfPlace (X, Q, B);
    }

    int 
    projectAndNormalizeOutOfPlace (MV& X_in, 
           MV& X_out,
           Teuchos::Array<mat_ptr> C,
           mat_ptr B,
           Teuchos::ArrayView<Teuchos::RCP<const MV> > Q) const
    {
      return impl_.projectAndNormalizeOutOfPlace (X_in, X_out, C, B, Q);
    }

    magnitude_type orthonormError (const MV &X) const {
      return impl_.orthonormError (X);
    }

    magnitude_type orthogError (const MV &X1, const MV &X2) const {
      return impl_.orthogError (X1, X2);
    }

  private:
    mutable TsqrOrthoManagerImpl<Scalar, MV> impl_;
  };


  template<class Scalar, class MV, class OP>
  class TsqrMatOrthoManager : 
    public MatOrthoManager<Scalar, MV, OP>,
    public OutOfPlaceNormalizerMixin<Scalar, MV>,
    public Teuchos::ParameterListAcceptorDefaultBase
  {
  public:
    typedef Scalar scalar_type;
    typedef typename Teuchos::ScalarTraits<Scalar>::magnitudeType magnitude_type;
    typedef MV multivector_type;
    typedef OP operator_type;

    typedef Teuchos::SerialDenseMatrix<int, Scalar> mat_type;
    typedef Teuchos::RCP<mat_type>                  mat_ptr;

  private:
    typedef MatOrthoManager<Scalar, MV, OP> base_type;

    typedef TsqrOrthoManagerImpl<Scalar, MV> tsqr_type;

    typedef SVQBOrthoManager<Scalar, MV, OP> svqb_type;

    typedef MultiVecTraits<Scalar, MV> MVT;

  public:
    TsqrMatOrthoManager (const Teuchos::RCP<Teuchos::ParameterList>& params,
       const std::string& label = "Belos",
       Teuchos::RCP<const OP> Op = Teuchos::null) :
      MatOrthoManager<Scalar, MV, OP> (Op),
      tsqr_ (params, label),
      pSvqb_ (Teuchos::null) // Initialized lazily
    {}

    TsqrMatOrthoManager (const std::string& label = "Belos",
       Teuchos::RCP<const OP> Op = Teuchos::null) :
      MatOrthoManager<Scalar, MV, OP> (Op),
      tsqr_ (label),
      pSvqb_ (Teuchos::null) // Initialized lazily
    {}

    virtual ~TsqrMatOrthoManager() {}

    Teuchos::RCP<const Teuchos::ParameterList> getValidParameters() const {
      return tsqr_.getValidParameters ();
    }

    Teuchos::RCP<const Teuchos::ParameterList> getFastParameters() {
      return tsqr_.getFastParameters ();
    }

    void setParameterList (const Teuchos::RCP<Teuchos::ParameterList>& params) {
      tsqr_.setParameterList (params);
    }

    virtual void 
    setOp (Teuchos::RCP< const OP > Op) 
    {
      // We override the base class' setOp() so that the
      // SVQBOrthoManager instance gets the new op.
      //
      // The base_type notation helps C++ resolve the name for a
      // member function of a templated base class.
      base_type::setOp (Op); // base class gets a copy of the Op too

      if (! Op.is_null()) {
  ensureSvqbInit (); // Make sure the SVQB object has been initialized
  pSvqb_->setOp (Op);
      }
    }

    Teuchos::RCP<const OP> getOp () const { 
      // The base_type notation helps C++ resolve the name for a
      // member function of a templated base class.
      return base_type::getOp(); 
    }

    void 
    projectMat (MV &X, 
    Teuchos::Array<Teuchos::RCP<const MV> > Q,
    Teuchos::Array<Teuchos::RCP<mat_type> > C = 
      Teuchos::tuple (Teuchos::RCP<mat_type> (Teuchos::null)),
    Teuchos::RCP<MV> MX = Teuchos::null,
    Teuchos::Array<Teuchos::RCP<const MV> > MQ = 
      Teuchos::tuple (Teuchos::null)) const
    {
      if (getOp().is_null()) {
  // FIXME (mfh 12 Jan 2011): Do we need to check if C is null
  // and allocate space if so?
  tsqr_.project (X, C, Q);
  // FIXME (mfh 20 Jul 2010) What about MX and MQ?
  // 
  // FIXME (mfh 12 Jan 2011) Need to port MVT::Assign from Belos to Anasazi
#if 0
  if (! MX.is_null()) {
    // MX gets a copy of X; M is the identity operator.
    MVT::Assign (X, *MX);
  }
#endif // 0
      } else {
  ensureSvqbInit ();
  pSvqb_->projectMat (X, Q, C, MX, MQ);
      }
    }

    int 
    normalizeMat (MV &X, 
      mat_ptr B = Teuchos::null,
      Teuchos::RCP<MV> MX = Teuchos::null) const
    {
      if (getOp().is_null()) {
  // FIXME (mfh 12 Jan 2011): Do we need to check if B is null
  // and allocate space if so?
  const int rank = tsqr_.normalize (X, B);
  // FIXME (mfh 20 Jul 2010) What about MX?
  // 
  // FIXME (mfh 12 Jan 2011) Need to port MVT::Assign from Belos to Anasazi
#if 0
  if (! MX.is_null()) {
    // MX gets a copy of X; M is the identity operator.
    MVT::Assign (X, *MX);
  }
#endif // 0
  return rank;
      } else {
  ensureSvqbInit ();
  return pSvqb_->normalizeMat (X, B, MX);
      }
    }

    int 
    projectAndNormalizeMat (MV &X, 
          Teuchos::Array<Teuchos::RCP<const MV> > Q,
          Teuchos::Array<Teuchos::RCP<mat_type> > C = 
            Teuchos::tuple (Teuchos::RCP<mat_type> (Teuchos::null)),
          Teuchos::RCP<mat_type> B = Teuchos::null,
          Teuchos::RCP<MV> MX = Teuchos::null,
          Teuchos::Array<Teuchos::RCP<const MV> > MQ = 
            Teuchos::tuple (Teuchos::RCP<const MV> (Teuchos::null))) const 
    {
      if (getOp().is_null()) {
  // FIXME (mfh 12 Jan 2011): Do we need to check if C and B
  // are null and allocate space if so?
  const int rank = tsqr_.projectAndNormalize (X, C, B, Q); 
  // FIXME (mfh 20 Jul 2010) What about MX and MQ?
  // mfh 12 Jan 2011: Ignore MQ (assume Q == MQ).
  // 
  // FIXME (mfh 12 Jan 2011) Need to port MVT::Assign from Belos to Anasazi
#if 0
  if (! MX.is_null()) {
    // MX gets a copy of X; M is the identity operator.
    MVT::Assign (X, *MX);
  }
#endif // 0
  return rank;
      } else {
  ensureSvqbInit ();
  return pSvqb_->projectAndNormalizeMat (X, Q, C, B, MX, MQ);
      }
    }

    int 
    normalizeOutOfPlace (MV& X, MV& Q, mat_ptr B) const
    {
      if (getOp().is_null()) {
  return tsqr_.normalizeOutOfPlace (X, Q, B);
      } else {
  // SVQB normalizes in place, so we have to copy.
  ensureSvqbInit ();
  const int rank = pSvqb_->normalize (X, B);
  MVT::Assign (X, Q);
  return rank;
      }
    }

    int 
    projectAndNormalizeOutOfPlace (MV& X_in, 
           MV& X_out,
           Teuchos::Array<mat_ptr> C,
           mat_ptr B,
           Teuchos::ArrayView<Teuchos::RCP<const MV> > Q) const
    {
      using Teuchos::null;

      if (getOp().is_null()) {
  return tsqr_.projectAndNormalizeOutOfPlace (X_in, X_out, C, B, Q);
      } else {
  ensureSvqbInit ();
  // SVQB's projectAndNormalize wants an Array, not an ArrayView.
  // Copy into a temporary Array and copy back afterwards.
  Teuchos::Array<Teuchos::RCP<const MV> > Q_array (Q);
  const int rank = pSvqb_->projectAndNormalize (X_in, Q_array, C, B);
  Q.assign (Q_array);
  // SVQB normalizes in place, so we have to copy X_in to X_out.
  MVT::Assign (X_in, X_out);
  return rank;
      }
    }

    magnitude_type
    orthonormErrorMat (const MV &X, Teuchos::RCP<const MV> MX = Teuchos::null) const
    {
      if (getOp().is_null()) {
  return tsqr_.orthonormError (X);
  // FIXME (mfh 20 Jul 2010) What about MX?
      } else {
  ensureSvqbInit ();
  return pSvqb_->orthonormErrorMat (X, MX);
      }
    }

    magnitude_type
    orthogErrorMat (const MV &X, 
        const MV &Y,
        Teuchos::RCP<const MV> MX = Teuchos::null, 
        Teuchos::RCP<const MV> MY = Teuchos::null) const
    {
      if (getOp().is_null()) {
  return tsqr_.orthogError (X, Y);
  // FIXME (mfh 20 Jul 2010) What about MX and MY?
      } else {
  ensureSvqbInit ();
  return pSvqb_->orthogErrorMat (X, Y, MX, MY);
      }
    }

  private:
    void 
    ensureSvqbInit () const
    {
      // NOTE (mfh 12 Oct 2011) For now, we rely on the default values
      // of SVQB parameters.
      if (pSvqb_.is_null()) {
  pSvqb_ = Teuchos::rcp (new svqb_type (getOp()));
      }
    }

    mutable tsqr_type tsqr_;

    mutable Teuchos::RCP<svqb_type> pSvqb_;
  };

} // namespace Anasazi

#endif // __AnasaziTsqrOrthoManager_hpp