/*
* 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
* @bug 8011128
* @summary Test file and directory name limits. This test is primarily
* intended to test Files.createDirectory on resolved paths at or around
* the short path limit of 248 on Windows.
*/
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
public class NameLimits {
static final int MAX_PATH = 255;
static final int MIN_PATH = 8; // arbitrarily chosen
static Path generatePath(int len) {
if (len < MIN_PATH)
throw new RuntimeException("Attempting to generate path less than MIN_PATH");
StringBuilder sb = new StringBuilder(len);
sb.append("name");
while (sb.length() < len) {
sb.append('X');
}
return Paths.get(sb.toString());
}
static boolean tryCreateFile(int len) throws IOException {
Path name = generatePath(len);
try {
Files.createFile(name);
} catch (IOException ioe) {
System.err.format("Unable to create file of length %d (full path %d), %s%n",
name.toString().length(), name.toAbsolutePath().toString().length(), ioe);
return false;
}
Files.delete(name);
return true;
}
static boolean tryCreateDirectory(int len) throws IOException {
Path name = generatePath(len);
try {
Files.createDirectory(name);
} catch (IOException ioe) {
System.err.format("Unable to create directory of length %d (full path %d), %s%n",
name.toString().length(), name.toAbsolutePath().toString().length(), ioe);
return false;
}
Files.delete(name);
return true;
}
public static void main(String[] args) throws Exception {
int len;
// find the maximum file name if MAX_PATH or less
len = MAX_PATH;
while (!tryCreateFile(len)) {
len--;
}
System.out.format("Testing createFile on paths %d .. %d%n", MIN_PATH, len);
while (len >= MIN_PATH) {
if (!tryCreateFile(len--))
throw new RuntimeException("Test failed");
}
// find the maximum directory name if MAX_PATH or less
len = MAX_PATH;
while (!tryCreateDirectory(len)) {
len--;
}
System.out.format("Testing createDirectory on paths %d .. %d%n", MIN_PATH, len);
while (len >= MIN_PATH) {
if (!tryCreateDirectory(len--))
throw new RuntimeException("Test failed");
}
}
}