/*
* Copyright (c) 2010, 2011, 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 maxDepth parameter
* @library ../..
* @compile MaxDepth.java CreateFileTree.java
* @run main MaxDepth
*/
import java.nio.file.*;
import java.nio.file.attribute.*;
import java.io.IOException;
import java.util.*;
public class MaxDepth {
public static void main(String[] args) throws IOException {
Path top = CreateFileTree.create();
try {
test(top);
} finally {
TestUtil.removeAll(top);
}
}
static void test(final Path top) throws IOException {
for (int i=0; i<5; i++) {
Set<FileVisitOption> opts = Collections.emptySet();
final int maxDepth = i;
Files.walkFileTree(top, opts, maxDepth, new SimpleFileVisitor<Path>() {
// compute depth based on relative path to top directory
private int depth(Path file) {
Path rp = file.relativize(top);
return (rp.getFileName().toString().equals("")) ? 0 : rp.getNameCount();
}
@Override
public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) {
int d = depth(dir);
if (d == maxDepth)
throw new RuntimeException("Should not open directories at maxDepth");
if (d > maxDepth)
throw new RuntimeException("Too deep");
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
int d = depth(file);
if (d > maxDepth)
throw new RuntimeException("Too deep");
return FileVisitResult.CONTINUE;
}
});
}
}
}