/*

 * Copyright (c) 2010, 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 6945316

   @summary The Win32ShellFolderManager2.isFileSystemRoot can throw NPE

   @author Pavel Porvatov

   @run main bug6945316

*/

import sun.awt.OSInfo;

import sun.awt.shell.ShellFolder;

import java.awt.*;

import java.io.File;

import java.util.concurrent.CountDownLatch;

public class bug6945316 {

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

        if (OSInfo.getOSType() != OSInfo.OSType.WINDOWS) {

            System.out.println("The test is suitable only for Windows OS. Skipped.");

            return;

        }

        // Init toolkit because it shouldn't be interrupted while initialization

        Toolkit.getDefaultToolkit();

        // Init the sun.awt.shell.Win32ShellFolderManager2.drives field

        ShellFolder.get("fileChooserComboBoxFolders");

        // To get NPE the path must obey the following rules:

        // path.length() == 3 && path.charAt(1) == ':'

        final File tempFile = new File("c:\\");

        for (int i = 0; i < 10000; i++) {

            final CountDownLatch countDownLatch = new CountDownLatch(1);

            final Thread thread = new Thread() {

                public void run() {

                    countDownLatch.countDown();

                    ShellFolder.isFileSystemRoot(tempFile);

                }

            };

            thread.start();

            countDownLatch.await();

            thread.interrupt();

        }

    }

}