| /* |
| * Copyright (c) 2005, 2021 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0, which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package com.sun.tools.txw2.model; |
| |
| import java.util.Iterator; |
| |
| /** |
| * @author Kohsuke Kawaguchi |
| */ |
| final class CycleIterator implements Iterator<Leaf> { |
| private Leaf start; |
| private Leaf current; |
| private boolean hasNext = true; |
| |
| public CycleIterator(Leaf start) { |
| assert start!=null; |
| this.start = start; |
| this.current = start; |
| } |
| |
| public boolean hasNext() { |
| return hasNext; |
| } |
| |
| public Leaf next() { |
| Leaf last = current; |
| current = current.getNext(); |
| if(current==start) |
| hasNext = false; |
| |
| return last; |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| } |