/*

 * 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 8039396

 * @run main UnresolvableObjectStreamClass serialize

 * @clean MySerializable

 * @run main UnresolvableObjectStreamClass deserialize

 *

 * @summary NPE when writing a class descriptor object to a custom

 *          ObjectOutputStream

 */

import java.io.*;

public class UnresolvableObjectStreamClass {

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

        if (args.length > 0 && args[0].equals("serialize")) {

            try (FileOutputStream fos = new FileOutputStream("temp1.ser");

                 ObjectOutputStream oos = new ObjectOutputStream(fos)) {

                ObjectStreamClass osc =

                         ObjectStreamClass.lookup(MySerializable.class);

                oos.writeObject(osc);

            }

        } else if (args.length > 0 && args[0].equals("deserialize")) {

            try (FileInputStream fis = new FileInputStream("temp1.ser");

                 ObjectInputStream ois = new ObjectInputStream(fis);

                 FileOutputStream fos = new FileOutputStream("temp2.ser");

                 ObjectOutputStream oos = new ObjectOutputStream(fos) {

                         /*must be subclassed*/}) {

                ObjectStreamClass osc = (ObjectStreamClass)ois.readObject();

                // serialize it again

                try {

                    oos.writeObject(osc);

                } catch (NullPointerException e) {

                    throw new RuntimeException("Failed to write" +

                            " unresolvable ObjectStreamClass", e);

                }

            }

        } else {

            throw new RuntimeException("The command line option must be" +

                                       " one of: serialize or deserialize");

        }

    }

}

class MySerializable implements Serializable {

}