1 /* 2 * Copyright (c) 2007, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 6585904 27 * @summary Checked collections with underlying maps with identity comparisons 28 */ 29 30 import java.util.*; 31 import static java.util.Collections.*; 32 33 public class CheckedIdentityMap { 34 void test(String[] args) throws Throwable { 35 Map<Integer, Integer> m1 = checkedMap( 36 new IdentityHashMap<Integer, Integer>(), 37 Integer.class, Integer.class); 38 Map<Integer, Integer> m2 = checkedMap( 39 new IdentityHashMap<Integer, Integer>(), 40 Integer.class, Integer.class); 41 m1.put(new Integer(1), new Integer(1)); 42 m2.put(new Integer(1), new Integer(1)); 43 44 Map.Entry<Integer, Integer> e1 = m1.entrySet().iterator().next(); 45 Map.Entry<Integer, Integer> e2 = m2.entrySet().iterator().next(); 46 check(! e1.equals(e2)); 47 check(e1.hashCode() == hashCode(e1)); 48 check(e2.hashCode() == hashCode(e2)); 49 } 50 51 int hashCode(Map.Entry<?,?> e) { 52 return (System.identityHashCode(e.getKey()) ^ 53 System.identityHashCode(e.getValue())); 54 } 55 56 //--------------------- Infrastructure --------------------------- 57 volatile int passed = 0, failed = 0; 58 void pass() {passed++;} 59 void fail() {failed++; Thread.dumpStack();} 60 void fail(String msg) {System.err.println(msg); fail();} 61 void unexpected(Throwable t) {failed++; t.printStackTrace();} 62 void check(boolean cond) {if (cond) pass(); else fail();} 63 void equal(Object x, Object y) { 64 if (x == null ? y == null : x.equals(y)) pass(); 65 else fail(x + " not equal to " + y);} 66 public static void main(String[] args) throws Throwable { 67 new CheckedIdentityMap().instanceMain(args);} 68 void instanceMain(String[] args) throws Throwable { 69 try {test(args);} catch (Throwable t) {unexpected(t);} 70 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); 71 if (failed > 0) throw new AssertionError("Some tests failed");} 72 abstract class F {abstract void f() throws Throwable;} 73 void THROWS(Class<? extends Throwable> k, F... fs) { 74 for (F f : fs) 75 try {f.f(); fail("Expected " + k.getName() + " not thrown");} 76 catch (Throwable t) { 77 if (k.isAssignableFrom(t.getClass())) pass(); 78 else unexpected(t);}} 79 Thread checkedThread(final Runnable r) { 80 return new Thread() {public void run() { 81 try {r.run();} catch (Throwable t) {unexpected(t);}}};} 82 }