/*

 * Copyright 2008 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 6758673

  @summary Tests that windows are removed from owner's child windows list

  @author art: area=awt.toplevel

  @run main OwnedWindowsLeak

*/

import java.awt.*;

import java.awt.event.*;

import java.lang.ref.*;

import java.lang.reflect.*;

import java.util.*;

public class OwnedWindowsLeak

{

    public static void main(String[] args)

    {

        Frame owner = new Frame("F");

        // First, create many windows

        Vector<WeakReference<Window>> children =

            new Vector<WeakReference<Window>>();

        for (int i = 0; i < 1000; i++)

        {

            Window child = new Window(owner);

            children.add(new WeakReference<Window>(child));

        }

        // Second, make sure all the memory is allocated

        Vector garbage = new Vector();

        while (true)

        {

            try

            {

                garbage.add(new byte[1000]);

            }

            catch (OutOfMemoryError e)

            {

                break;

            }

        }

        // Third, make sure all the weak references are null

        for (WeakReference<Window> ref : children)

        {

            if (ref.get() != null)

            {

                throw new RuntimeException("Test FAILED: some of child windows are not GCed");

            }

        }

        // Fourth, make sure owner's children list contains no elements

        try

        {

            Field f = Window.class.getDeclaredField("ownedWindowList");

            f.setAccessible(true);

            Vector ownersChildren = (Vector)f.get(owner);

            if (ownersChildren.size() > 0)

            {

                throw new RuntimeException("Test FAILED: some of the child windows are not removed from owner's children list");

            }

        }

        catch (NoSuchFieldException z)

        {

            System.out.println("Test PASSED: no 'ownedWindowList' field in Window class");

            return;

        }

        catch (Exception z)

        {

            throw new RuntimeException("Test FAILED: unexpected exception", z);

        }

        // Test passed

        System.out.println("Test PASSED");

        owner.dispose();

    }

}