package jalview.util;

import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;

/**
 * An iterator that traverses a list backwards.
 * 
 * @author gmcarstairs (and checked against
 *         org.codehaus.groovey.runtime.ReverseListIterator)
 *
 * @param <E>
 */
public class ReverseListIterator<E> implements Iterator<E>
{

  private ListIterator<E> iterator;

  public ReverseListIterator(List<E> stuff)
  {
    this.iterator = stuff.listIterator(stuff.size());
  }
  @Override
  public boolean hasNext()
  {
    return iterator.hasPrevious();
  }

  @Override
  public E next()
  {
    return iterator.previous();
  }

  @Override
  public void remove()
  {
    iterator.remove();
  }

}