package rebelsky.list;

/**
 * Simple cursors for array-based simple lists.
 *
 * @author CSC152 2004F
 */
class SimpleNodeCursor
	implements SimpleCursor
{
// +--------+------------------------------------------------------------
// | Fields |
// +--------+

	/**
	 * The list that we iterate.
	 */
	SimpleLinkedList list;
	
	/**
	 * The node that represents the current position in the list.
	 */
	Node pos;

// +--------------+------------------------------------------------------
// | Constructors |
// +--------------+

	/**
	 * Construct the cursor.
	 */
	public SimpleNodeCursor(SimpleLinkedList _list)
	{
		this.list = _list;
		this.pos = this.list.front;
	} // SimpleNodeCursor

	
// +---------+-----------------------------------------------------------
// | Methods |
// +---------+

	/**
	 * Get a value not yet visited by this cursor.  See
	 * interface for more details.
	 */
	public Object next()
		throws NoSuchPosition
	{
		// Get the thing at the current position
		Object tmp = this.pos.data;
		// Advance to the next thing
		this.pos = this.pos.next;
		// Return the thing you found
		return tmp;
	} // next()

	/**
	 * Determine whether or not unvisited elements remain.
	 * See interface for more details.
	 */
	public boolean hasNext()
	{
		// STUB
		return false;
	} // hasNext()
} // class SimpleNodeCursor