/*

 * Copyright 2008-2009 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.

 */

import java.nio.file.*;

import java.nio.file.attribute.*;

import java.io.IOException;

import java.util.*;

/**

 * Unit test for Files.walkFileTree to test TERMINATE return value

 */

public class TerminateWalk {

    static final Random rand = new Random();

    static boolean terminated;

    static FileVisitResult maybeTerminate() {

        if (terminated)

            throw new RuntimeException("FileVisitor invoked after termination");

        if (rand.nextInt(10) == 0) {

            terminated = true;

            return FileVisitResult.TERMINATE;

        } else {

            return FileVisitResult.CONTINUE;

        }

    }

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

        Path dir = Paths.get(args[0]);

        Files.walkFileTree(dir, new FileVisitor<Path>() {

            public FileVisitResult preVisitDirectory(Path dir) {

                return maybeTerminate();

            }

            public FileVisitResult preVisitDirectoryFailed(Path dir, IOException exc) {

                return maybeTerminate();

            }

            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {

                return maybeTerminate();

            }

            public FileVisitResult postVisitDirectory(Path dir, IOException x) {

                return maybeTerminate();

            }

            public FileVisitResult visitFileFailed(Path file, IOException x) {

                return maybeTerminate();

            }

        });

    }

}