1/* 2 * Copyright (c) 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. 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 5045147 27 * @summary Test handling of null with empty Map 28 * @author Mike Duigou 29 */ 30 31import java.util.*; 32import java.util.concurrent.*; 33import java.util.concurrent.atomic.*; 34import java.lang.reflect.*; 35 36public class EmptyMapAndNulls { 37 38 @SuppressWarnings("rawtypes") 39 static void realMain(String[] args) throws Throwable { 40 // No comparator 41 Map<String,String> comparable = new TreeMap<>(); 42 43 // insert null into empty map (5045147 failure) 44 try { 45 comparable.put(null, "anything"); 46 fail("null shouldn't be accepted"); 47 } catch (NullPointerException failed) { 48 pass(); 49 } 50 51 // insert non-null into empty map 52 try { 53 comparable.put("test", "anything"); 54 pass(); 55 } catch (NullPointerException failed) { 56 fail(); 57 } 58 59 // insert null into non-empty map 60 try { 61 comparable.put(null, "anything"); 62 fail("null shouldn't be accepted"); 63 } catch (NullPointerException failed) { 64 pass(); 65 } 66 67 // Comparator (String.CASE_INSENSITIVE_ORDER). Intentionally a raw type. 68 Map comparator = new TreeMap(String.CASE_INSENSITIVE_ORDER); 69 70 // insert null into empty map (5045147 failure) 71 try { 72 comparator.put(null, "anything"); 73 fail("null shouldn't be accepted"); 74 } catch (NullPointerException failed) { 75 pass(); 76 } 77 78 // insert non-null into empty map 79 try { 80 comparator.put("test", "anything"); 81 pass(); 82 } catch (NullPointerException failed) { 83 fail(); 84 } 85 86 // insert null into non-empty map 87 try { 88 comparator.put(null, "anything"); 89 fail("null shouldn't be accepted"); 90 } catch (NullPointerException failed) { 91 pass(); 92 } 93 94 comparator.clear(); 95 96 // insert non-String into empty map (5045147 failure) 97 try { 98 comparator.put(new Object(), "anything"); 99 fail("Object shouldn't be accepted"); 100 } catch (ClassCastException failed) { 101 pass(); 102 } 103 104 } 105 106 //--------------------- Infrastructure --------------------------- 107 static volatile int passed = 0, failed = 0; 108 static void pass() {passed++;} 109 static void fail() {failed++; Thread.dumpStack();} 110 static void fail(String msg) {System.out.println(msg); fail();} 111 static void unexpected(Throwable t) {failed++; t.printStackTrace();} 112 static void check(boolean cond) {if (cond) pass(); else fail();} 113 static void equal(Object x, Object y) { 114 if (x == null ? y == null : x.equals(y)) pass(); 115 else fail(x + " not equal to " + y);} 116 public static void main(String[] args) throws Throwable { 117 try {realMain(args);} catch (Throwable t) {unexpected(t);} 118 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); 119 if (failed > 0) throw new AssertionError("Some tests failed");} 120} 121