1 /* 2 * Copyright (c) 2006, 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 6276988 27 * @summary All enum constants in a class should share a single "universe". 28 * @modules java.base/java.util:open 29 */ 30 31 package test.java.util.EnumSet; 32 33 import java.lang.reflect.Field; 34 import java.math.RoundingMode; 35 import java.util.EnumSet; 36 37 public class OneUniverse { 38 39 private static final Field universeField; 40 41 static { 42 try { 43 universeField = EnumSet.class.getDeclaredField("universe"); 44 } catch (NoSuchFieldException e) { 45 throw new AssertionError(e); 46 } 47 universeField.setAccessible(true); 48 } 49 main(String... args)50 public static void main(String... args) { 51 52 EnumSet<RoundingMode> noneSet = EnumSet.noneOf(RoundingMode.class); 53 EnumSet<RoundingMode> allSet = EnumSet.allOf(RoundingMode.class); 54 55 if (getUniverse(noneSet) != getUniverse(allSet)) { 56 throw new AssertionError( 57 "Multiple universes detected. Inform the bridge!"); 58 } 59 } 60 getUniverse(EnumSet<E> set)61 private static <E extends Enum<E>> Enum<E>[] getUniverse(EnumSet<E> set) { 62 try { 63 return (Enum<E>[]) universeField.get(set); 64 } catch (IllegalAccessException e) { 65 throw new AssertionError(e); 66 } 67 } 68 } 69