/*

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 * 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.

 *

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 */

/* @test

   @bug 6868611

   @summary FileSystemView throws NullPointerException

   @author Pavel Porvatov

   @run main bug6868611

*/

import javax.swing.*;

import javax.swing.filechooser.FileSystemView;

import java.io.File;

public class bug6868611 {

    private static final int COUNT = 1000;

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

        String tempDirProp = System.getProperty("java.io.tmpdir");

        final String tempDir = tempDirProp == null || !new File(tempDirProp).isDirectory() ?

            System.getProperty("user.home") : tempDirProp;

        System.out.println("Temp directory: " + tempDir);

        // Create 1000 files

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

            new File(tempDir, "temp" + i).createNewFile();

        }

        // Init default FileSystemView

        SwingUtilities.invokeAndWait(new Runnable() {

            public void run() {

                FileSystemView.getFileSystemView().getFiles(new File(tempDir), false);

            }

        });

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

            Thread thread = new MyThread(tempDir);

            thread.start();

            Thread.sleep((long) (Math.random() * 100));

            thread.interrupt();

            if (i % 100 == 0) {

                System.out.print("*");

            }

        }

        System.out.println();

        // Remove 1000 files

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

            new File(tempDir, "temp" + i).delete();

        }

    }

    private static class MyThread extends Thread {

        private final String dir;

        private MyThread(String dir) {

            this.dir = dir;

        }

        public void run() {

            FileSystemView fileSystemView = FileSystemView.getFileSystemView();

            fileSystemView.getFiles(new File(dir), false);

        }

    }

}