vectorIterator.h

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#ifndef BALL_LINALG_VECTORITERATOR_H
#define BALL_LINALG_VECTORITERATOR_H

#ifndef BALL_LINALG_VECTOR_IH
# include <BALL/MATHS/LINALG/vector.ih>
#endif

#ifndef BALL_CONCEPT_RANDOMACCESSITERATOR_H
#include <BALL/CONCEPT/randomAccessIterator.h>
#endif

namespace BALL {

        // forward declaration
        template <typename valuetype>
    class Vector;

  
        template <typename valuetype>
  class VectorIteratorTraits
   {

    typedef valuetype ValueType;

    typedef valuetype* PointerType;

    typedef int IteratorPosition;

    typedef int Distance;

    typedef int Index;

      friend class Vector<valuetype>;
    public:

      virtual ~VectorIteratorTraits()
      {
      }

      VectorIteratorTraits()
        : bound_(0),
          position_(0)
      {
      }
      
      VectorIteratorTraits(const Vector<valuetype>& vector)
        : bound_(const_cast<Vector<valuetype>*>(&vector)),
          position_(0)
      {
      }
      
      VectorIteratorTraits(const VectorIteratorTraits& traits)
        : bound_(traits.bound_),
          position_(traits.position_)
      {
      }
      
      VectorIteratorTraits& operator = (const VectorIteratorTraits& traits)
      {
        bound_ = traits.bound_;
        position_ = traits.position_;
    
        return *this;
      }

      Vector<valuetype>* getContainer()
      {
        return bound_;
      }
      
      const Vector<valuetype>* getContainer() const
      {
        return bound_;
      }
      
      bool isSingular() const
      {
        return (bound_ == 0);
      }
      
      IteratorPosition& getPosition()
      {
        return position_;
      }

      const IteratorPosition& getPosition() const
      {
        return position_;
      }

      bool operator == (const VectorIteratorTraits& traits) const
      {
        return (position_ == traits.position_);
      }

      bool operator != (const VectorIteratorTraits& traits) const
      {
        return (position_ != traits.position_);
      }
        
      bool operator < (const VectorIteratorTraits& traits) const
      {
        return (position_ < traits.position_);
      }

      Distance getDistance(const VectorIteratorTraits& traits) const
      {
        return (Distance)(position_ - traits.position_);
      }
      
      bool isValid() const
      {
        return ((bound_ != 0) && (position_ >= 0) && (position_ < (int)bound_->data_.size()));
      }

      void invalidate()
      {
        bound_ = 0;
        position_ = -1;
      }
      
      void toBegin()
      {
        position_ = 0;
      }

      bool isBegin() const
      {
        return ( position_ == 0 );
      }

      void toEnd()
      {
        position_ = bound_->data_.size();
      }
      
      bool isEnd() const
      {
        return ( position_ == (int)bound_->data_.size());
      }
      
      ValueType& getData()
      {
        return (*bound_)[position_];
      }

      const ValueType& getData() const
      {
        return (*bound_)[position_];
      }

      void forward()
      {
        position_++;
      }

      friend std::ostream& operator << (std::ostream& s, const VectorIteratorTraits& traits)
      {
        return (s << traits.position_ << ' ');
      }
      
      void dump(std::ostream& s) const
      {
        s << position_ << std::endl;
      }
      
      void toRBegin()
      {
        position_ = bound_->data_.size() - 1;
      }
      
      bool isRBegin() const
      {
        return (position_ == bound_->data_.size() - 1);
      }
      
      void toREnd()
      {
        position_ = -1;
      }

      bool isREnd() const
      {
        return (position_ <= -1);
      }
      
      void backward()
      {
        position_--;
      }

      void backward(Distance distance)
      {
        position_ -= distance;
      }

      void forward(Distance distance)
      {
        position_ += distance;
      }
      
      ValueType& getData(Index index)
      {
        return (*bound_)[index];
      }
      
      const ValueType& getData(Index index) const
      {
        return (*bound_)[index];
      }
      

      protected:

      Vector<valuetype>*    bound_;
      IteratorPosition    position_;
    };


} // namespace BALL

#endif

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