package sequence;

import arraylist.IndexList;
import position.Position;
import position.PositionList;
import exceptions.*;

/**
 * Created with MONSTER.
 * User: xgiovio
 * Date: 30/03/2014
 * Time: 14:31
 */
public interface Sequence<E> extends PositionList<E>, IndexList<E> {
    public E getFirst() throws EmptySequenceException;
    public E getLast()  throws  EmptySequenceException;
    public E removeFirst() throws  EmptySequenceException;
    public E removeLast() throws EmptySequenceException;

    public Position<E> atIndex(  int  index)  throws  BoundaryViolationException;
    public int  indexOf(Position <E> position) throws InvalidPositionException;


}