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--;
}
}
}