| /* |
| * Copyright (c) 2013, 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 |
| * @summary Unit test for Files.walkFileTree to test SKIP_SUBTREE return value |
| * @library ../.. |
| * @compile SkipSubtree.java CreateFileTree.java |
| * @run main SkipSubtree |
| * @key randomness |
| */ |
| import java.nio.file.*; |
| import java.nio.file.attribute.BasicFileAttributes; |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Random; |
| import java.util.Set; |
| |
| public class SkipSubtree { |
| |
| static final Random rand = new Random(); |
| static final Set<Path> skipped = new HashSet<>(); |
| |
| // check if this path should have been skipped |
| static void check(Path path) { |
| do { |
| if (skipped.contains(path)) |
| throw new RuntimeException(path + " should not have been visited"); |
| path = path.getParent(); |
| } while (path != null); |
| } |
| |
| // indicates if the subtree should be skipped |
| static boolean skip(Path path) { |
| if (rand.nextInt(3) == 0) { |
| skipped.add(path); |
| return true; |
| } |
| return false; |
| } |
| |
| public static void main(String[] args) throws Exception { |
| Path top = CreateFileTree.create(); |
| try { |
| test(top); |
| } finally { |
| TestUtil.removeAll(top); |
| } |
| } |
| |
| static void test(final Path start) throws IOException { |
| Files.walkFileTree(start, new SimpleFileVisitor<Path>() { |
| @Override |
| public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) { |
| check(dir); |
| if (skip(dir)) |
| return FileVisitResult.SKIP_SUBTREE; |
| return FileVisitResult.CONTINUE; |
| } |
| @Override |
| public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) { |
| check(file); |
| return FileVisitResult.CONTINUE; |
| } |
| @Override |
| public FileVisitResult postVisitDirectory(Path dir, IOException x) { |
| if (x != null) |
| throw new RuntimeException(x); |
| check(dir); |
| return FileVisitResult.CONTINUE; |
| } |
| }); |
| } |
| } |