static Map<String, ByteBuffer> readUserDefinedFileAttributes(Path file) throws IOException { UserDefinedFileAttributeView view = getFileAttributeView(file, UserDefinedFileAttributeView.class); Map<String, ByteBuffer> result = new HashMap<>(); for (String name : view.list()) { int size = view.size(name); ByteBuffer bb = ByteBuffer.allocate(size); int n = view.read(name, bb); assertTrue(n == size); bb.flip(); result.put(name, bb); } return result; }
// "randomize" the file attributes of the given file. static void randomizeAttributes(Path file) throws IOException { String os = System.getProperty("os.name"); boolean isWindows = os.startsWith("Windows"); boolean isUnix = os.equals("SunOS") || os.equals("Linux"); boolean isDirectory = isDirectory(file, NOFOLLOW_LINKS); if (isUnix) { Set<PosixFilePermission> perms = getPosixFilePermissions(file, NOFOLLOW_LINKS); PosixFilePermission[] toChange = { PosixFilePermission.GROUP_READ, PosixFilePermission.GROUP_WRITE, PosixFilePermission.GROUP_EXECUTE, PosixFilePermission.OTHERS_READ, PosixFilePermission.OTHERS_WRITE, PosixFilePermission.OTHERS_EXECUTE }; for (PosixFilePermission perm : toChange) { if (heads()) { perms.add(perm); } else { perms.remove(perm); } } setPosixFilePermissions(file, perms); } if (isWindows) { DosFileAttributeView view = getFileAttributeView(file, DosFileAttributeView.class, NOFOLLOW_LINKS); // only set or unset the hidden attribute view.setHidden(heads()); } boolean addUserDefinedFileAttributes = heads() && getFileStore(file).supportsFileAttributeView("xattr"); // remove this when copying a direcory copies its named streams if (isWindows && isDirectory) addUserDefinedFileAttributes = false; if (addUserDefinedFileAttributes) { UserDefinedFileAttributeView view = getFileAttributeView(file, UserDefinedFileAttributeView.class); int n = rand.nextInt(16); while (n > 0) { byte[] value = new byte[1 + rand.nextInt(100)]; view.write("user." + Integer.toString(n), ByteBuffer.wrap(value)); n--; } } }