/*

 * Copyright (c) 2000, 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 4089540

 * @summary Verify compatibility with 1.1 externalizable format

 */

import java.io.*;

import java.util.*;

class Foo implements Externalizable {

    private static final long serialVersionUID = 0xbabel;

    int x;

    int y;

    Object obj;

    public Foo() {

    }

    public Foo(int x, int y, Object obj) {

        this.x = x;

        this.y = y;

        this.obj = obj;

    }

    public void writeExternal(ObjectOutput out) throws IOException {

        out.writeInt(x);

        out.writeInt(y);

        out.writeObject(obj);

    }

    public void readExternal(ObjectInput in)

        throws IOException, ClassNotFoundException

    {

        x = in.readInt();

        y = in.readInt();

        obj = in.readObject();

    }

    public boolean equals(Object other) {

        if (other instanceof Foo) {

            Foo f = (Foo) other;

            return ((x == f.x) && (y == f.y) &&

                    ((obj != null) ? obj.equals(f.obj) : (f.obj == null)));

        }

        return false;

    }

}

public class ExternalizableBlockData {

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

        byte[] oldExternalizableBytes = getFileBytes(

                new File(System.getProperty("test.src", "."), "old.ser"));

        Foo foo = new Foo(0xbad, 0xbeef, "burrito");

        ByteArrayOutputStream bout = new ByteArrayOutputStream();

        ObjectOutputStream oout = new ObjectOutputStream(bout);

        oout.useProtocolVersion(ObjectStreamConstants.PROTOCOL_VERSION_1);

        oout.writeObject(foo);

        oout.close();

        if (! Arrays.equals(bout.toByteArray(), oldExternalizableBytes)) {

            throw new Error();

        }

        ObjectInputStream oin = new ObjectInputStream(

                new ByteArrayInputStream(oldExternalizableBytes));

        if (! foo.equals(oin.readObject())) {

            throw new Error();

        }

        bout = new ByteArrayOutputStream();

        oout = new ObjectOutputStream(bout);

        oout.writeObject(foo);

        oout.close();

        if (Arrays.equals(bout.toByteArray(), oldExternalizableBytes)) {

            throw new Error();

        }

    }

    static byte[] getFileBytes(File file) throws IOException {

        FileInputStream fin = new FileInputStream(file);

        ByteArrayOutputStream bout = new ByteArrayOutputStream();

        byte[] buf = new byte[256];

        int n;

        while ((n = fin.read(buf)) != -1) {

            bout.write(buf, 0, n);

        }

        fin.close();

        return bout.toByteArray();

    }

}