1 /* 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 */ 22 23 /* 24 * This file is available under and governed by the GNU General Public 25 * License version 2 only, as published by the Free Software Foundation. 26 * However, the following notice accompanied the original version of this 27 * file: 28 * 29 * Written by Martin Buchholz with assistance from members of JCP JSR-166 30 * Expert Group and released to the public domain, as explained at 31 * http://creativecommons.org/publicdomain/zero/1.0/ 32 */ 33 34 /* 35 * @test 36 * @bug 6950540 37 * @summary Attempt to add a null throws NullPointerException 38 */ 39 40 import java.util.ArrayList; 41 import java.util.Collection; 42 import java.util.Comparator; 43 import java.util.PriorityQueue; 44 import java.util.SortedSet; 45 import java.util.TreeSet; 46 import java.util.concurrent.ArrayBlockingQueue; 47 import java.util.concurrent.LinkedBlockingDeque; 48 import java.util.concurrent.LinkedBlockingQueue; 49 import java.util.concurrent.PriorityBlockingQueue; 50 51 public class NoNulls { test(String[] args)52 void test(String[] args) throws Throwable { 53 final Comparator<String> nullTolerantComparator 54 = new Comparator<>() { 55 public int compare(String x, String y) { 56 return (x == null ? -1 : 57 y == null ? 1 : 58 x.compareTo(y)); 59 }}; 60 61 final SortedSet<String> nullSortedSet 62 = new TreeSet<>(nullTolerantComparator); 63 nullSortedSet.add(null); 64 65 final PriorityQueue<String> nullPriorityQueue 66 = new PriorityQueue<>() { 67 public Object[] toArray() { return new Object[] { null };}}; 68 69 final Collection<String> nullCollection = new ArrayList<>(); 70 nullCollection.add(null); 71 72 THROWS(NullPointerException.class, 73 new F() { void f() { 74 new PriorityQueue<String>(nullCollection); 75 }}, 76 new F() { void f() { 77 new PriorityBlockingQueue<String>(nullCollection); 78 }}, 79 new F() { void f() { 80 new ArrayBlockingQueue<String>(10, false, nullCollection); 81 }}, 82 new F() { void f() { 83 new ArrayBlockingQueue<String>(10, true, nullCollection); 84 }}, 85 new F() { void f() { 86 new LinkedBlockingQueue<String>(nullCollection); 87 }}, 88 new F() { void f() { 89 new LinkedBlockingDeque<String>(nullCollection); 90 }}, 91 92 new F() { void f() { 93 new PriorityQueue<String>((Collection<String>) nullPriorityQueue); 94 }}, 95 new F() { void f() { 96 new PriorityBlockingQueue<String>((Collection<String>) nullPriorityQueue); 97 }}, 98 99 new F() { void f() { 100 new PriorityQueue<String>(nullSortedSet); 101 }}, 102 new F() { void f() { 103 new PriorityBlockingQueue<String>(nullSortedSet); 104 }}, 105 106 new F() { void f() { 107 new PriorityQueue<String>((Collection<String>) nullSortedSet); 108 }}, 109 new F() { void f() { 110 new PriorityBlockingQueue<String>((Collection<String>) nullSortedSet); 111 }}, 112 113 new F() { void f() { 114 new PriorityQueue<String>(nullPriorityQueue); 115 }}, 116 new F() { void f() { 117 new PriorityBlockingQueue<String>(nullPriorityQueue); 118 }}, 119 120 new F() { void f() { 121 new PriorityQueue<String>().add(null); 122 }}, 123 new F() { void f() { 124 new PriorityBlockingQueue<String>().add(null); 125 }}, 126 new F() { void f() { 127 new ArrayBlockingQueue<String>(10, false).add(null); 128 }}, 129 new F() { void f() { 130 new ArrayBlockingQueue<String>(10, true).add(null); 131 }}, 132 new F() { void f() { 133 new LinkedBlockingQueue<String>().add(null); 134 }}, 135 new F() { void f() { 136 new LinkedBlockingDeque<String>().add(null); 137 }}, 138 139 new F() { void f() { 140 new PriorityQueue<String>().offer(null); 141 }}, 142 new F() { void f() { 143 new PriorityBlockingQueue<String>().offer(null); 144 }}); 145 146 nullSortedSet.add("foo"); 147 nullCollection.add("foo"); 148 THROWS(NullPointerException.class, 149 new F() { void f() { 150 new PriorityQueue<String>(nullCollection); 151 }}, 152 new F() { void f() { 153 new PriorityBlockingQueue<String>(nullCollection); 154 }}, 155 156 new F() { void f() { 157 new PriorityQueue<String>((Collection<String>) nullPriorityQueue); 158 }}, 159 new F() { void f() { 160 new PriorityBlockingQueue<String>((Collection<String>) nullPriorityQueue); 161 }}, 162 163 new F() { void f() { 164 new PriorityQueue<String>(nullSortedSet); 165 }}, 166 new F() { void f() { 167 new PriorityBlockingQueue<String>(nullSortedSet); 168 }}, 169 170 new F() { void f() { 171 new PriorityQueue<String>((Collection<String>) nullSortedSet); 172 }}, 173 new F() { void f() { 174 new PriorityBlockingQueue<String>((Collection<String>) nullSortedSet); 175 }}); 176 177 } 178 179 //--------------------- Infrastructure --------------------------- 180 volatile int passed = 0, failed = 0; pass()181 void pass() {passed++;} fail()182 void fail() {failed++; Thread.dumpStack();} fail(String msg)183 void fail(String msg) {System.err.println(msg); fail();} unexpected(Throwable t)184 void unexpected(Throwable t) {failed++; t.printStackTrace();} check(boolean cond)185 void check(boolean cond) {if (cond) pass(); else fail();} equal(Object x, Object y)186 void equal(Object x, Object y) { 187 if (x == null ? y == null : x.equals(y)) pass(); 188 else fail(x + " not equal to " + y);} main(String[] args)189 public static void main(String[] args) throws Throwable { 190 new NoNulls().instanceMain(args);} instanceMain(String[] args)191 public void instanceMain(String[] args) throws Throwable { 192 try {test(args);} catch (Throwable t) {unexpected(t);} 193 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); 194 if (failed > 0) throw new AssertionError("Some tests failed");} f()195 abstract class F {abstract void f() throws Throwable;} THROWS(Class<? extends Throwable> k, F... fs)196 void THROWS(Class<? extends Throwable> k, F... fs) { 197 for (F f : fs) 198 try {f.f(); fail("Expected " + k.getName() + " not thrown");} 199 catch (Throwable t) { 200 if (k.isAssignableFrom(t.getClass())) pass(); 201 else unexpected(t);}} 202 } 203