1/*
2 * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @summary Unit test for Files.walkFileTree to test TERMINATE return value
27 * @library ../..
28 * @compile TerminateWalk.java CreateFileTree.java
29 * @run main TerminateWalk
30 * @key randomness
31 */
32
33import java.nio.file.*;
34import java.nio.file.attribute.*;
35import java.io.IOException;
36import java.util.*;
37
38public class TerminateWalk {
39
40    static final Random rand = new Random();
41    static boolean terminated;
42
43    static FileVisitResult maybeTerminate() {
44        if (terminated)
45            throw new RuntimeException("FileVisitor invoked after termination");
46        if (rand.nextInt(10) == 0) {
47            terminated = true;
48            return FileVisitResult.TERMINATE;
49        } else {
50            return FileVisitResult.CONTINUE;
51        }
52    }
53
54    public static void main(String[] args) throws Exception {
55        Path top = CreateFileTree.create();
56        try {
57            test(top);
58        } finally {
59            TestUtil.removeAll(top);
60        }
61    }
62
63    static void test(Path start) throws IOException {
64        Files.walkFileTree(start, new SimpleFileVisitor<Path>() {
65            @Override
66            public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) {
67                return maybeTerminate();
68            }
69            @Override
70            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
71                return maybeTerminate();
72            }
73            @Override
74            public FileVisitResult postVisitDirectory(Path dir, IOException x) {
75                return maybeTerminate();
76            }
77        });
78    }
79}
80