package rebelsky.lists;

import java.util.Vector;


/**
 * Iterators that step over the values in a vector.
 *
 * @author CSC152 2005S
 */
public class VectorCursor<T>
  implements Cursor<T>
{
  // +--------+--------------------------------------------------
  // | Fields |
  // +--------+

  /**
   * The current position in the vector.
   */
  int pos;

  /**
   * The vector we're iterating.
   */
  Vector<T> vec;


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

  /**
   * Create a new cursor for a particular vector.
   */
  public VectorCursor(Vector<T> _vec)
  {
    this.vec = _vec;
  } // VectorCursor()


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

  public T next() 
  {
    T tmp = vec.get(this.pos); // Error checking handled by vec
    this.pos++;
    return tmp;
  } // next()

  public boolean hasNext()
  {
    return this.pos < this.vec.size();
  } // hasNext()

} // class VectorCursor