/*

 * Copyright (c) 2019, 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     8227368

 * @summary Test deserialization of a stream containing EnumSet.class object

 */

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.util.EnumSet;

import java.util.stream.Collectors;

import java.util.stream.IntStream;

public class EnumSetClassSerialization {

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

        // EnumSet.class object serialized with JDK 8

        int[] bytes = {

            0xac, 0xed, 0x00, 0x05, 0x76, 0x72, 0x00, 0x11, 0x6a, 0x61, 0x76, 0x61, 0x2e, 0x75, 0x74, 0x69,

            0x6c, 0x2e, 0x45, 0x6e, 0x75, 0x6d, 0x53, 0x65, 0x74, 0x0e, 0x03, 0x21, 0x6a, 0xcd, 0x8c, 0x29,

            0xdd, 0x02, 0x00, 0x02, 0x4c, 0x00, 0x0b, 0x65, 0x6c, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x54, 0x79,

            0x70, 0x65, 0x74, 0x00, 0x11, 0x4c, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c, 0x61, 0x6e, 0x67, 0x2f,

            0x43, 0x6c, 0x61, 0x73, 0x73, 0x3b, 0x5b, 0x00, 0x08, 0x75, 0x6e, 0x69, 0x76, 0x65, 0x72, 0x73,

            0x65, 0x74, 0x00, 0x11, 0x5b, 0x4c, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c, 0x61, 0x6e, 0x67, 0x2f,

            0x45, 0x6e, 0x75, 0x6d, 0x3b, 0x78, 0x70

        };

        InputStream in = new InputStream() {

            int i = 0;

            @Override

            public int read() {

                return i < bytes.length ? bytes[i++] & 0xFF : -1;

            }

        };

        ObjectInputStream ois = new ObjectInputStream(in);

        Object res = ois.readObject();

        if (res != EnumSet.class) {

            throw new AssertionError(

                "Expected: " + EnumSet.class + ", got: " + res);

        }

    }

    /**

     * This class can be used to print out lines that constitute

     * the 'bytes' variable initializer in the test.

     */

    public static class Serializer {

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

            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            ObjectOutputStream oos = new ObjectOutputStream(baos);

            oos.writeObject(EnumSet.class);

            oos.close();

            byte[] bytes = baos.toByteArray();

            int bpl = 16;

            System.out.print(

                IntStream

                    .range(0, (bytes.length + bpl - 1) / bpl)

                    .mapToObj(i -> IntStream

                        .range(

                            i * bpl,

                            Math.min(i * bpl + bpl, bytes.length)

                        )

                        .mapToObj(ii -> {

                            String s = Integer.toHexString(bytes[ii] & 0xFF);

                            return s.length() == 1 ? "0x0" + s : "0x" + s;

                        })

                        .collect(Collectors.joining(", "))

                    )

                    .collect(Collectors.joining(",\n  ", "int[] bytes = {\n  ", "\n};"))

            );

        }

    }

}