Thyra_VectorSpaceDefaultBase.hpp

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//    Thyra: Interfaces and Support for Abstract Numerical Algorithms
//                 Copyright (2004) Sandia Corporation
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#ifndef THYRA_VECTOR_SPACE_DEFAULT_BASE_HPP
#define THYRA_VECTOR_SPACE_DEFAULT_BASE_HPP

#include "Thyra_VectorSpaceDefaultBaseDecl.hpp"
#include "Thyra_VectorSpaceBase.hpp"
#include "Thyra_VectorBase.hpp"
#include "Thyra_MultiVectorStdOps.hpp"
#include "Thyra_DefaultColumnwiseMultiVector.hpp"

namespace Thyra {

// Helper classes

template<class Scalar>
class CopyVectorViewBack {
public:
  CopyVectorViewBack( const VectorBase<Scalar> *v, const RTOpPack::SubVectorView<Scalar>  &raw_v )
    :v_(v), raw_v_(raw_v)
    {}
  ~CopyVectorViewBack()
    {
      RTOpPack::ConstSubVectorView<Scalar> sv;
      v_->acquireDetachedView(Range1D(),&sv);
      RTOpPack::assign_entries( &raw_v_, sv );
      v_->releaseDetachedView(&sv);
    }
private:
  const VectorBase<Scalar>                   *v_;
  const RTOpPack::SubVectorView<Scalar>  raw_v_;
};

template<class Scalar>
class CopyMultiVectorViewBack {
public:
  CopyMultiVectorViewBack( const MultiVectorBase<Scalar> *mv, const RTOpPack::SubMultiVectorView<Scalar>  &raw_mv )
    :mv_(mv), raw_mv_(raw_mv)
    {}
  ~CopyMultiVectorViewBack()
    {
      RTOpPack::ConstSubMultiVectorView<Scalar> smv;
      mv_->acquireDetachedView(Range1D(),Range1D(),&smv);
      RTOpPack::assign_entries( &raw_mv_, smv );
      mv_->releaseDetachedView(&smv);
    }
private:
  const MultiVectorBase<Scalar>                       *mv_;
  const RTOpPack::SubMultiVectorView<Scalar>  raw_mv_;
};

// Overridden protected functions from VectorSpaceBase

template<class Scalar>
Teuchos::RefCountPtr<MultiVectorBase<Scalar> > 
VectorSpaceDefaultBase<Scalar>::createMembers(int numMembers) const
{
  return Teuchos::rcp(new DefaultColumnwiseMultiVector<Scalar> (Teuchos::rcp(this,false),this->smallVecSpcFcty()->createVecSpc(numMembers)));
}

template<class Scalar>
Teuchos::RefCountPtr<VectorBase<Scalar> >
VectorSpaceDefaultBase<Scalar>::createMemberView( const RTOpPack::SubVectorView<Scalar> &raw_v ) const
{
#ifdef TEUCHOS_DEBUG
  TEST_FOR_EXCEPT( raw_v.subDim() != this->dim() );
#endif
  // Create a vector
  Teuchos::RefCountPtr<VectorBase<Scalar> > v = this->createMember();
  // Copy initial values in raw_v into vector
  RTOpPack::SubVectorView<Scalar> sv;
  v->acquireDetachedView(Range1D(),&sv);
  RTOpPack::assign_entries( &sv, raw_v );
  v->commitDetachedView(&sv);
  // Setup smart pointer to vector to copy view back out just before vector is destroyed
  Teuchos::set_extra_data(
    Teuchos::rcp(new CopyVectorViewBack<Scalar>(&*v,raw_v))
    ,"CopyVectorViewBack"
    ,&v
    ,Teuchos::PRE_DESTROY
    );
  return v;
}

template<class Scalar>
Teuchos::RefCountPtr<const VectorBase<Scalar> >
VectorSpaceDefaultBase<Scalar>::createMemberView( const RTOpPack::ConstSubVectorView<Scalar> &raw_v ) const
{
#ifdef TEUCHOS_DEBUG
  TEST_FOR_EXCEPT( raw_v.subDim() != this->dim() );
#endif
  // Create a vector
  Teuchos::RefCountPtr<VectorBase<Scalar> > v = this->createMember();
  // Copy initial values in raw_v into vector
  RTOpPack::SubVectorView<Scalar> sv;
  v->acquireDetachedView(Range1D(),&sv);
  RTOpPack::assign_entries( &sv, raw_v );
  v->commitDetachedView(&sv);
  return v;
}

template<class Scalar>
Teuchos::RefCountPtr<MultiVectorBase<Scalar> >
VectorSpaceDefaultBase<Scalar>::createMembersView( const RTOpPack::SubMultiVectorView<Scalar> &raw_mv ) const
{
#ifdef TEUCHOS_DEBUG
  TEST_FOR_EXCEPT( raw_mv.subDim() != this->dim() );
#endif
  // Create a multi-vector
  Teuchos::RefCountPtr< MultiVectorBase<Scalar> > mv = this->createMembers(raw_mv.numSubCols());
  // Copy initial values in raw_mv into multi-vector
  RTOpPack::SubMultiVectorView<Scalar> smv;
  mv->acquireDetachedView(Range1D(),Range1D(),&smv);
  RTOpPack::assign_entries( &smv, raw_mv );
  mv->commitDetachedView(&smv);
  // Setup smart pointer to multi-vector to copy view back out just before multi-vector is destroyed
  Teuchos::set_extra_data(
    Teuchos::rcp(new CopyMultiVectorViewBack<Scalar>(&*mv,raw_mv))
    ,"CopyMultiVectorViewBack"
    ,&mv
    ,Teuchos::PRE_DESTROY
    );
  return mv;
}

template<class Scalar>
Teuchos::RefCountPtr<const MultiVectorBase<Scalar> >
VectorSpaceDefaultBase<Scalar>::createMembersView( const RTOpPack::ConstSubMultiVectorView<Scalar> &raw_mv ) const
{
#ifdef TEUCHOS_DEBUG
  TEST_FOR_EXCEPT( raw_mv.subDim() != this->dim() );
#endif
  // Create a multi-vector
  Teuchos::RefCountPtr< MultiVectorBase<Scalar> > mv = this->createMembers(raw_mv.numSubCols());
  // Copy values in raw_mv into multi-vector
  RTOpPack::SubMultiVectorView<Scalar> smv;
  mv->acquireDetachedView(Range1D(),Range1D(),&smv);
  RTOpPack::assign_entries( &smv, raw_mv );
  mv->commitDetachedView(&smv);
  return mv;
}

} // end namespace Thyra

#endif // THYRA_VECTOR_SPACE_DEFAULT_BASE_HPP

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