0N/A/*
2362N/A * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 6312056 4155650 4294891 4904074
0N/A * @summary Reasonable things should happen if mutating while iterating.
0N/A */
0N/A
0N/Aimport java.util.*;
0N/Aimport java.util.concurrent.*;
0N/A
0N/Apublic class ConcurrentModification {
0N/A static volatile int passed = 0, failed = 0;
0N/A
0N/A static void fail(String msg) {
0N/A failed++;
0N/A new AssertionError(msg).printStackTrace();
0N/A }
0N/A
0N/A static void unexpected(Throwable t) {
0N/A failed++;
0N/A t.printStackTrace();
0N/A }
0N/A
0N/A static void check(boolean condition, String msg) {
0N/A if (condition)
0N/A passed++;
0N/A else
0N/A fail(msg);
0N/A }
0N/A
0N/A static void check(boolean condition) {
0N/A check(condition, "Assertion failed");
0N/A }
0N/A
0N/A private static void test(ConcurrentMap<Integer, Integer> m)
0N/A {
0N/A try {
0N/A m.clear();
0N/A check(m.isEmpty());
0N/A m.put(1,2);
0N/A Iterator<Map.Entry<Integer,Integer>> it = m.entrySet().iterator();
0N/A if (it.hasNext()) {
0N/A m.remove(1); // sneaky
0N/A Map.Entry<Integer, Integer> e = it.next();
0N/A check(m.isEmpty());
0N/A check(e.getKey() == 1);
0N/A check(e.getValue() == 2);
0N/A }
0N/A } catch (Throwable t) {unexpected(t);}
0N/A
0N/A try {
0N/A m.clear();
0N/A check(m.isEmpty());
0N/A m.put(1,2);
0N/A Iterator<Map.Entry<Integer,Integer>> it = m.entrySet().iterator();
0N/A if (it.hasNext()) {
0N/A m.put(1,3); // sneaky
0N/A Map.Entry<Integer, Integer> e = it.next();
0N/A check(e.getKey() == 1);
0N/A check(e.getValue() == 2 || e.getValue() == 3);
0N/A if (m instanceof ConcurrentHashMap) {
0N/A e.setValue(4);
0N/A check(m.get(1) == 4);
0N/A }
0N/A }
0N/A } catch (Throwable t) {unexpected(t);}
0N/A }
0N/A
0N/A public static void main(String[] args) {
0N/A test(new ConcurrentHashMap<Integer,Integer>());
0N/A test(new ConcurrentSkipListMap<Integer,Integer>());
0N/A
0N/A System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
0N/A if (failed > 0) throw new Error("Some tests failed");
0N/A }
0N/A}