package rebelsky.list;

/**
 * Things that indicate positions in a list and can move.  Cursors
 * start at the front of the list.
 *
 * @author CSC152 2004F
 */
public class ArrayBasedCursor
	extends ArrayBasedSimpleCursor
	implements Cursor
{

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

	/**
	 * Construct the cursor.
	 */
	public ArrayBasedCursor(ArrayBasedSimpleList _list)
	{
		super(_list);
	} // ArrayBasedCursor
	
// +---------+-----------------------------------------------------------
// | Methods |
// +---------+

	/**
	 * Reset the cursor to the front of the list.
	 */
	public void toFront()
	{
		// STUB
	} // toFront()

	/**
	 * Reset the cursor to the rear of the list.
	 */
	public void toRear()
	{
		// STUB
	} // toRear()


	/**
	 * Determine if the cursor is still valid.
	 */
	public boolean isValid()
	{
		// STUB
		return true;
	} // isValid()

	/**
	 * Get the value "under" the cursor.
	 */
	public Object get() {
		return null;
	} // get()

	/** 
	 * Retreat the cursor to the previous object and return that
	 * object.
	 *
	 * @pre
	 *   Must not be at the front of the ist.
	 */
	public Object prev()
	{
		// STUB
		return null;
	} // reference()

	/*
	 * Determine if the cursor is at the front of its list.
	 */
	public boolean hasPrev()
	{
		// STUB
		return true;
	} // atFront()
} // interface Cursor