@Override
 @SuppressWarnings("unchecked")
 public <A extends BasicFileAttributes> A readAttributes(
     Path file, Class<A> type, LinkOption... options) throws IOException {
   if (type == DosFileAttributes.class) {
     DosFileAttributeView view = getFileAttributeView(file, DosFileAttributeView.class, options);
     return (A) view.readAttributes();
   } else {
     return super.readAttributes(file, type, options);
   }
 }
예제 #2
0
  // "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--;
      }
    }
  }