1/* 2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26/* 27 * This source code is provided to illustrate the usage of a given feature 28 * or technique and has been deliberately simplified. Additional steps 29 * required for a production-quality application, such as security checks, 30 * input validation and proper error handling, might not be present in 31 * this sample code. 32 */ 33 34 35package com.sun.tools.example.debug.tty; 36 37import com.sun.jdi.ThreadGroupReference; 38import com.sun.jdi.ThreadReference; 39import java.util.List; 40import java.util.Iterator; 41 42class ThreadIterator implements Iterator<ThreadReference> { 43 Iterator<ThreadReference> it = null; 44 ThreadGroupIterator tgi; 45 46 ThreadIterator(ThreadGroupReference tg) { 47 tgi = new ThreadGroupIterator(tg); 48 } 49 50 ThreadIterator(List<ThreadGroupReference> tgl) { 51 tgi = new ThreadGroupIterator(tgl); 52 } 53 54 ThreadIterator() { 55 tgi = new ThreadGroupIterator(); 56 } 57 58 @Override 59 public boolean hasNext() { 60 while (it == null || !it.hasNext()) { 61 if (!tgi.hasNext()) { 62 return false; // no more 63 } 64 it = tgi.nextThreadGroup().threads().iterator(); 65 } 66 return true; 67 } 68 69 @Override 70 public ThreadReference next() { 71 return it.next(); 72 } 73 74 public ThreadReference nextThread() { 75 return next(); 76 } 77 78 @Override 79 public void remove() { 80 throw new UnsupportedOperationException(); 81 } 82} 83