/*

 * Copyright (c) 2006, 2007, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 * questions.

 */

/*

 * @test

 * @bug     6276988

 * @summary All enum constants in a class should share a single "universe".

 */

import java.lang.reflect.Field;

import java.math.RoundingMode;

import java.util.EnumSet;

public class OneUniverse {

    private static final Field universeField;

    static {

        try {

            universeField = EnumSet.class.getDeclaredField("universe");

        } catch (NoSuchFieldException e) {

            throw new AssertionError(e);

        }

        universeField.setAccessible(true);

    }

    public static void main(String... args) {

        EnumSet<RoundingMode> noneSet = EnumSet.noneOf(RoundingMode.class);

        EnumSet<RoundingMode> allSet  = EnumSet.allOf(RoundingMode.class);

        if (getUniverse(noneSet) != getUniverse(allSet)) {

            throw new AssertionError(

                    "Multiple universes detected.  Inform the bridge!");

        }

    }

    private static <E extends Enum<E>> Enum<E>[] getUniverse(EnumSet<E> set) {

        try {

            return (Enum<E>[]) universeField.get(set);

        } catch (IllegalAccessException e) {

            throw new AssertionError(e);

        }

    }

}