/*

 * Copyright (c) 1999, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/**

 * @test

 * @bug 4190323

 * @summary EMPTY_SET, EMPTY_LIST, and the collections returned by

 *          nCopies and singleton were spec'd to be serializable, but weren't.

 */

import java.io.*;

import java.util.*;

public class Ser {

    public static void main(String[] args) throws Exception {

        try {

            ByteArrayOutputStream bos = new ByteArrayOutputStream();

            ObjectOutputStream out = new ObjectOutputStream(bos);

            out.writeObject(Collections.EMPTY_SET);

            out.flush();

            ObjectInputStream in = new ObjectInputStream(

                    new ByteArrayInputStream(bos.toByteArray()));

            if (!Collections.EMPTY_SET.equals(in.readObject()))

                throw new RuntimeException("empty set Ser/Deser failure.");

        } catch (Exception e) {

            throw new RuntimeException("Failed to serialize empty set:" + e);

        }

        try {

            ByteArrayOutputStream bos = new ByteArrayOutputStream();

            ObjectOutputStream out = new ObjectOutputStream(bos);

            out.writeObject(Collections.EMPTY_LIST);

            out.flush();

            ObjectInputStream in = new ObjectInputStream(

                    new ByteArrayInputStream(bos.toByteArray()));

            if (!Collections.EMPTY_LIST.equals(in.readObject()))

                throw new RuntimeException("empty list Ser/Deser failure.");

        } catch (Exception e) {

            throw new RuntimeException("Failed to serialize empty list:" + e);

        }

        try {

            ByteArrayOutputStream bos = new ByteArrayOutputStream();

            ObjectOutputStream out = new ObjectOutputStream(bos);

            Set gumby = Collections.singleton("gumby");

            out.writeObject(gumby);

            out.flush();

            ObjectInputStream in = new ObjectInputStream(

                    new ByteArrayInputStream(bos.toByteArray()));

            if (!gumby.equals(in.readObject()))

                throw new RuntimeException("Singleton Ser/Deser failure.");

        } catch (Exception e) {

            throw new RuntimeException("Failed to serialize singleton:" + e);

        }

        try {

            ByteArrayOutputStream bos = new ByteArrayOutputStream();

            ObjectOutputStream out = new ObjectOutputStream(bos);

            List gumbies = Collections.nCopies(50, "gumby");

            out.writeObject(gumbies);

            out.flush();

            ObjectInputStream in = new ObjectInputStream(

                    new ByteArrayInputStream(bos.toByteArray()));

            if (!gumbies.equals(in.readObject()))

                throw new RuntimeException("nCopies Ser/Deser failure.");

        } catch (Exception e) {

            throw new RuntimeException("Failed to serialize nCopies:" + e);

        }

    }

}