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 */ 31 32 import java.nio.file.*; 33 import java.nio.file.attribute.*; 34 import java.io.IOException; 35 import java.util.*; 36 37 public class TerminateWalk { 38 39 static final Random rand = new Random(); 40 static boolean terminated; 41 42 static FileVisitResult maybeTerminate() { 43 if (terminated) 44 throw new RuntimeException("FileVisitor invoked after termination"); 45 if (rand.nextInt(10) == 0) { 46 terminated = true; 47 return FileVisitResult.TERMINATE; 48 } else { 49 return FileVisitResult.CONTINUE; 50 } 51 } 52 53 public static void main(String[] args) throws Exception { 54 Path top = CreateFileTree.create(); 55 try { 56 test(top); 57 } finally { 58 TestUtil.removeAll(top); 59 } 60 } 61 62 static void test(Path start) throws IOException { 63 Files.walkFileTree(start, new SimpleFileVisitor<Path>() { 64 @Override 65 public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) { 66 return maybeTerminate(); 67 } 68 @Override 69 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) { 70 return maybeTerminate(); 71 } 72 @Override 73 public FileVisitResult postVisitDirectory(Path dir, IOException x) { 74 return maybeTerminate(); 75 } 76 }); 77 } 78 }