#include "Map.h"
#include "MapIterator.h"
#include <exception>
using namespace std;


MapIterator::MapIterator(const Map& d) : map(d)
{
	//O(1)
	this->_current=0;
	while (this->_current<this->map._capacity && this->map._elements[this->_current]==NULL_TELEM)
	{
		this->_current++;
	}
	this->_first=this->_current;
}


void MapIterator::first() {
	//O(1)
	this->_current=this->_first;
}


void MapIterator::next() {
	//O(1)
	if(this->valid()){	
		this->_current++;
		while (this->_current<this->map._capacity && this->map._elements[this->_current]==NULL_TELEM)
		{
			this->_current++;
		}
	}
	else
		throw exception();
}


TElem MapIterator::getCurrent(){
	//O(1)
	if(this->valid())
		return this->map._elements[this->_current];
	throw exception();
}


bool MapIterator::valid() const {
	//O(1)
	if(this->_current<this->map._capacity && this->map._elements[this->_current]!=NULL_TELEM)
		return true;
	return false;
}