EpetraExt_Transform_Composite.h

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// 
//     EpetraExt: Epetra Extended - Linear Algebra Services Package
//                 Copyright (2001) Sandia Corporation
// 
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
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//-----------------------------------------------------------------------
// EpetraExt_Transform_Composite.h
//-----------------------------------------------------------------------

#ifndef EPETRAEXT_TRANSFORM_COMPOSITE_H
#define EPETRAEXT_TRANSFORM_COMPOSITE_H

#include <EpetraExt_Transform.h>

#include <list>

namespace EpetraExt {


template<typename T>
class Transform_Composite : public SameTypeTransform<T>
{

 public:

  typedef SameTypeTransform<T> * TransformTypePtr;

  Transform_Composite() {}

  virtual ~Transform_Composite();


  void addTransform( TransformTypePtr new_trans );


  virtual
  typename Transform<T,T>::NewTypeRef
  operator()
  ( typename Transform<T,T>::OriginalTypeRef orig );


  virtual bool fwd();


  virtual bool rvs();

 protected:

  typedef typename list<TransformTypePtr>::iterator         TransListIter;
  typedef typename list<TransformTypePtr>::reverse_iterator TransListRvsIter;

  list<TransformTypePtr> transList_;

}; // end class Tranform_Composite

template<typename T>
Transform_Composite<T>::
~Transform_Composite()
{
  TransListIter iter = transList_.begin();
  TransListIter end = transList_.end();
  for( ; iter != end; ++iter ) delete *iter;
}

template<typename T>
void
Transform_Composite<T>::
addTransform( TransformTypePtr new_trans )
{
  transList_.push_back( new_trans );
}

template<typename T>
typename Transform<T,T>::NewTypeRef
Transform_Composite<T>::
operator()
( typename Transform<T,T>::OriginalTypeRef orig )
{
  this->origObj_ = &orig;
  this->newObj_ = &orig;

  TransListIter iter = transList_.begin();
  TransListIter end = transList_.end();
  for( ; iter != end; ++iter )
    this->newObj_ = &((**iter)( *(this->newObj_) ));

  return *(this->newObj_);
}

template<typename T>
bool
Transform_Composite<T>::
fwd()
{
  bool success = true;

  TransListIter iter = transList_.begin();
  TransListIter end = transList_.end();
  for( ; iter != end; ++iter )
    if( !(**iter).fwd() ) return false;

  return success;
}

template<typename T>
bool
Transform_Composite<T>::
rvs()
{
  bool success = true;

  TransListRvsIter iter = transList_.rbegin();
  TransListRvsIter end = transList_.rend();
  for( ; iter != end; ++iter )
    if( !(**iter).rvs() ) return false;

  return success;
}

} //namespace EpetraExt
  
#endif //EPETRAEXT_TRANSFORM_COMPOSITE_H

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