/*

 * Copyright 1999 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/* @test

 * @bug 4217676

 * @summary Ensure that object streams support serialization of long strings

 *          (strings whose UTF representation > 64k in length)

 */

import java.io.*;

import java.util.*;

public class LongString {

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

        Random rand = new Random(System.currentTimeMillis());

        ByteArrayOutputStream bout;

        ByteArrayInputStream bin;

        ObjectOutputStream oout;

        ObjectInputStream oin;

        FileInputStream fin;

        File mesgf;

        // generate a long random string

        StringBuffer sbuf = new StringBuffer();

        for (int i = 0; i < 100000; i++)

            sbuf.append((char) rand.nextInt(Character.MAX_VALUE + 1));

        String str = sbuf.toString();

        // write and read long string

        bout = new ByteArrayOutputStream();

        oout = new ObjectOutputStream(bout);

        oout.writeObject(str);

        oout.flush();

        bin = new ByteArrayInputStream(bout.toByteArray());

        oin = new ObjectInputStream(bin);

        String strcopy = (String) oin.readObject();

        if (! str.equals(strcopy))

            throw new Error("deserialized long string not equal to original");

        // test backwards compatibility

        String mesg = "Message in golden file";

        bout = new ByteArrayOutputStream();

        oout = new ObjectOutputStream(bout);

        oout.writeObject(mesg);

        oout.flush();

        byte[] buf1 = bout.toByteArray();

        mesgf = new File(System.getProperty("test.src", "."), "mesg.ser");

        fin = new FileInputStream(mesgf);

        bout = new ByteArrayOutputStream();

        while (fin.available() > 0)

            bout.write(fin.read());

        byte[] buf2 = bout.toByteArray();

        if (! Arrays.equals(buf1, buf2))

            throw new Error("incompatible string format (write)");

        fin = new FileInputStream(mesgf);

        oin = new ObjectInputStream(fin);

        String mesgcopy = (String) oin.readObject();

        if (! mesg.equals(mesgcopy))

            throw new Error("incompatible string format (read)");

    }

}