67 lines
2.2 KiB
Java
67 lines
2.2 KiB
Java
/*
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* Copyright (c) 2006, 2007, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6276988
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* @summary All enum constants in a class should share a single "universe".
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* @modules java.base/java.util:open
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*/
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import java.lang.reflect.Field;
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import java.math.RoundingMode;
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import java.util.EnumSet;
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public class OneUniverse {
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private static final Field universeField;
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static {
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try {
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universeField = EnumSet.class.getDeclaredField("universe");
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} catch (NoSuchFieldException e) {
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throw new AssertionError(e);
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}
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universeField.setAccessible(true);
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}
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public static void main(String... args) {
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EnumSet<RoundingMode> noneSet = EnumSet.noneOf(RoundingMode.class);
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EnumSet<RoundingMode> allSet = EnumSet.allOf(RoundingMode.class);
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if (getUniverse(noneSet) != getUniverse(allSet)) {
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throw new AssertionError(
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"Multiple universes detected. Inform the bridge!");
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}
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}
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private static <E extends Enum<E>> Enum<E>[] getUniverse(EnumSet<E> set) {
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try {
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return (Enum<E>[]) universeField.get(set);
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} catch (IllegalAccessException e) {
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throw new AssertionError(e);
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}
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}
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}
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