1 /* 2 * Copyright (c) 2010, 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 import java.nio.file.*; 25 import java.nio.file.attribute.*; 26 import java.io.IOException; 27 import java.util.*; 28 29 /** 30 * Unit test for Files.walkFileTree to test maxDepth parameter 31 */ 32 33 public class MaxDepth { 34 public static void main(String[] args) throws Exception { 35 final Path top = Paths.get(args[0]); 36 37 for (int i=0; i<5; i++) { 38 Set<FileVisitOption> opts = Collections.emptySet(); 39 final int maxDepth = i; 40 Files.walkFileTree(top, opts, maxDepth, new SimpleFileVisitor<Path>() { 41 // compute depth based on relative path to top directory 42 private int depth(Path file) { 43 Path rp = file.relativize(top); 44 return (rp == null) ? 0 : rp.getNameCount(); 45 } 46 47 @Override 48 public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) { 49 int d = depth(dir); 50 if (d == maxDepth) 51 throw new RuntimeException("Should not open directories at maxDepth"); 52 if (d > maxDepth) 53 throw new RuntimeException("Too deep"); 54 return FileVisitResult.CONTINUE; 55 } 56 57 @Override 58 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) { 59 int d = depth(file); 60 if (d > maxDepth) 61 throw new RuntimeException("Too deep"); 62 return FileVisitResult.CONTINUE; 63 } 64 }); 65 } 66 } 67 }