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 33 import java.nio.file.*; 34 import java.nio.file.attribute.*; 35 import java.io.IOException; 36 import java.util.*; 37 38 public 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 }