/*
 * SelectiveConstIterator.hpp
 *
 *  Created on: Mar 19, 2013
 *      Author: heber
 */

#ifndef SELECTIVECONSTITERATOR_HPP_
#define SELECTIVECONSTITERATOR_HPP_

// include config.h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif


#include <iterator>

template<class _Target,
         class _Container,
         class _Descriptor>
class SelectiveConstIterator :
  public std::iterator<typename std::iterator_traits<typename _Container::const_iterator>::difference_type,
                       typename std::iterator_traits<typename _Container::const_iterator>::value_type,
                       typename std::iterator_traits<typename _Container::const_iterator>::pointer,
                       typename std::iterator_traits<typename _Container::const_iterator>::reference>
{
public:
  typedef typename _Container::const_iterator     Iter;
  typedef          _Target                  Target;
  typedef typename Iter::value_type         value_type;
  typedef typename Iter::difference_type    difference_type;
  typedef typename Iter::pointer            pointer;
  typedef typename Iter::reference          reference;
  typedef typename Iter::iterator_category  iterator_category;


  SelectiveConstIterator(_Descriptor, const _Container&);
  SelectiveConstIterator(_Descriptor, const _Container&, Iter);
  SelectiveConstIterator(const SelectiveConstIterator&);
  SelectiveConstIterator& operator=(const SelectiveConstIterator&);
  SelectiveConstIterator& operator++();     // prefix
  SelectiveConstIterator  operator++(int);  // postfix with dummy parameter
  bool operator==(const SelectiveConstIterator&);
  bool operator!=(const SelectiveConstIterator&);
  Target const operator*();

  int getCount();
protected:
  void advanceState();
  Iter state;
  typename _Descriptor::impl_ptr descr;
  int index;

  const _Container &content;
};

#endif /* SELECTIVECONSTITERATOR_HPP_ */