/*

 * Copyright 2003 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 4652911

 * @summary test Hashtable readObject for invocation of overridable put method

 */

import java.util.Hashtable;

import java.io.ByteArrayOutputStream;

import java.io.ObjectOutputStream;

import java.io.ByteArrayInputStream;

import java.io.ObjectInputStream;

import java.io.Serializable;

/**

 * Class that extends Hashtable to demonstrate bug when

 * subclass wraps the values put into the Hashtable.

 */

public class ReadObject extends Hashtable {

    /**

     * Wraps the values put into MyHashtable objects

     */

    class ValueWrapper implements Serializable {

        private Object mValue;

        ValueWrapper(Object value) {

            mValue = value;

        }

        Object getValue() {

            return mValue;

        }

    };

    public Object get(Object key) {

        ValueWrapper valueWrapper = (ValueWrapper)super.get(key);

        Object value = valueWrapper.getValue();

        if(value instanceof ValueWrapper)

            throw new RuntimeException("Hashtable.get bug");

        return value;

    }

    public Object put(Object key, Object value) {

        if(value instanceof ValueWrapper)

            throw new RuntimeException(

                "Hashtable.put bug: value is already wrapped");

        ValueWrapper valueWrapper = new ValueWrapper(value);

        super.put(key, valueWrapper);

        return value;

    }

    private static Object copyObject(Object oldObj) {

        Object newObj = null;

        try {

           //Create a stream in which to serialize the object.

            ByteArrayOutputStream ostream = new ByteArrayOutputStream();

            ObjectOutputStream p = new ObjectOutputStream(ostream);

            //Serialize the object into the stream

            p.writeObject(oldObj);

            //Create an input stream from which to deserialize the object

            byte[] byteArray = ostream.toByteArray();

            ByteArrayInputStream istream = new ByteArrayInputStream(byteArray);

            ObjectInputStream q = new ObjectInputStream(istream);

            //Deserialize the object

            newObj = q.readObject();

        } catch (Exception ex) {

            ex.printStackTrace();

        }

        return newObj;

    }

    public static void main(String[] args) {

        ReadObject myHashtable = new ReadObject();

        myHashtable.put("key", "value");

        ReadObject myHashtableCopy = (ReadObject)copyObject(myHashtable);

        String value = (String)myHashtableCopy.get("key");

    }

};