package DataStructures;

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

/**
 * Provides the enumeration of an empty collection
 * @author Peter Williams
 */

class EmptyIterator<E> implements Iterator<E> {

    /**
     * @return <code>false</code> in all cases
     */
    public boolean hasNext() {
	return false;
    }

    /**
     * @exception NoSuchElementException in all cases
     */
    public E next() {
	throw new NoSuchElementException();
    }

    /**
     * @exception IllegalStateException in all cases
     */
    public void remove() {
	throw new IllegalStateException();
    }

}