/*

 * Copyright (c) 2005, 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 6232010

 * @summary this test checks that replacing SoftCache class with ConcurrentMap

 *          in ObjectInputStream/ObjectOutputStream gives an opportunity to

 *          classes which are inherited from OIS and OOS and loaded through

 *          separete ClassLoaders be available for garbage collection

 *

 * @author Andrey Ozerov

 * @run main/othervm/policy=security.policy SubclassGC

 */

import java.io.*;

import java.lang.ref.Reference;

import java.lang.ref.ReferenceQueue;

import java.lang.ref.WeakReference;

import java.lang.reflect.Constructor;

import java.net.URL;

import java.net.URLClassLoader;

public class SubclassGC {

        private static final long TIMEOUT = 1000;

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

                System.err.println("\n Regression test for bug 6232010\n");

                if (System.getSecurityManager() == null) {

                        System.setSecurityManager(new SecurityManager());

                }

                ClassLoader systemLoader = ClassLoader.getSystemClassLoader();

                Class<? extends ObjectOutputStream> cl =

                        Class.forName(SubclassOfOOS.class.getName(), false,

                                                  loader).asSubclass(ObjectOutputStream.class);

                Constructor<? extends ObjectOutputStream> cons =

                        cl.getConstructor(OutputStream.class);

                OutputStream os = new ByteArrayOutputStream();

                ObjectOutputStream obj = cons.newInstance(os);

                final ReferenceQueue<Class<?>> queue = new ReferenceQueue<Class<?>>();

                WeakReference<Class<?>> ref = new WeakReference<Class<?>>(cl, queue);

                cl = null;

                obj = null;

                loader = null;

                cons = null;

                systemLoader = null;

                System.err.println("\nStart Garbage Collection right now");

                System.gc();

                Reference<? extends Class<?>> dequeued = queue.remove(TIMEOUT);

                if (dequeued == ref) {

                        System.err.println("\nTEST PASSED");

                } else {

                        throw new Error();

                }

        }

}