/* * Sun Public License Notice * * The contents of this file are subject to the Sun Public License * Version 1.0 (the "License"). You may not use this file except in * compliance with the License. A copy of the License is available at * http://www.sun.com/ * * The Original Code is Forte for Java, Community Edition. The Initial * Developer of the Original Code is Sun Microsystems, Inc. Portions * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved. */ package org.openide.util.enum; import java.util.Enumeration; import java.util.NoSuchElementException; /** The class that encapsulates one object into one element enumeration. * * @author Jaroslav Tulach * @version 0.10, Apr 10, 1998 */ public class SingletonEnumeration implements Enumeration { /** object to return */ private Object object; /** @param object object to be put into the enumeration */ public SingletonEnumeration (Object object) { this.object = object; } /** Tests if this enumeration contains next element. * @return <code>true</code> if this enumeration contains it * <code>false</code> otherwise. */ public boolean hasMoreElements() { return object != null; } /** Returns the next element of this enumeration. * @return the next element of this enumeration. * @exception NoSuchElementException if no more elements exist. */ public synchronized Object nextElement() { if (object == null) { throw new NoSuchElementException(); } else { Object o = object; object = null; return o; } } } /* * Log * 4 Gandalf 1.3 10/22/99 Ian Formanek NO SEMANTIC CHANGE - Sun * Microsystems Copyright in File Comment * 3 Gandalf 1.2 6/8/99 Ian Formanek ---- Package Change To * org.openide ---- * 2 Gandalf 1.1 1/5/99 Ian Formanek * 1 Gandalf 1.0 1/5/99 Ian Formanek * $ */