package iterator;

import arraylist.ArrayIndexList;
import position.Position;

import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * Created with MONSTER.
 * User: xgiovio
 * Date: 06/04/2014
 * Time: 21:13
 */

// generic iterable list creation using an arraylist. the class calling this metod should pass an array of Position<E>

public class IterablePositionIndexList<E> implements Iterable<Position<E>> {

    Position<E>[]  new_structure = null;

    public IterablePositionIndexList (Position<E>[] in){
        new_structure = in;
    }

    @Override
    public Iterator<Position<E>> iterator() {
        return new getpositionsiterator(new_structure);
    }


    class getpositionsiterator implements Iterator<Position<E>>{

        public getpositionsiterator(Position<E>[] in_elements){
            for (int i = 0;i< in_elements.length;i++){
                data.add(i,in_elements[i]);
            }
        }

        @Override
        public boolean hasNext() {

            if (pos <= data.size() -2){
                return true;
            }else {
                return false;
            }

        }

        @Override
        public Position<E> next() throws NoSuchElementException {
            if (hasNext()){
                pos++;
                return data.get(pos);
            }else {
                throw new NoSuchElementException();
            }
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException ();
        }

        private ArrayIndexList<Position<E>> data = new ArrayIndexList<Position<E>>();
        private int pos = -1;


    }


}