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 }