package org.codehaus.classloader;

import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * This is an empty implementation of Iterator.
 * <p>
 * @author Ben Yu
 * Aug 4, 2006 12:19:53 PM
 */
public final class NilIterator implements Iterator {
  private NilIterator(){}
  private static NilIterator singleton = new NilIterator();
  /**
   * Get an instance of this implementation.
   */
  public static Iterator instance(){
    return singleton;
  }
  public boolean hasNext() {
    return false;
  }

  public Object next() {
    throw new NoSuchElementException();
  }

  public void remove() {
    throw new UnsupportedOperationException();
  }

}