How to use

isInvalid

method

in

java.io.File

public boolean renameTo(File dest) {
  if (dest == null) throw new NullPointerException();
  if (this.isInvalid() || dest.isInvalid()) return false;
  return fs.rename(this, dest);
}

public boolean setWritable(boolean writable, boolean ownerOnly) {
  if (isInvalid()) return false;
  return fs.setPermission(this, FileSystem.ACCESS_WRITE, writable, ownerOnly);
}

public boolean canExecute() {
  if (isInvalid()) return false;
  return fs.checkAccess(this, FileSystem.ACCESS_EXECUTE);
}

public boolean canWrite() {
  if (isInvalid()) return false;
  return fs.checkAccess(this, FileSystem.ACCESS_WRITE);
}

public boolean isFile() {
  if (isInvalid()) return false;
  return ((fs.getBooleanAttributes(this) & FileSystem.BA_REGULAR) != 0);
}

public String[] list() {
  if (isInvalid()) return null;
  return fs.list(this);
}

public boolean canRead() {
  if (isInvalid()) return false;
  return fs.checkAccess(this, FileSystem.ACCESS_READ);
}

public long length() {
  if (isInvalid()) return 0L;
  return fs.getLength(this);
}

public boolean delete() {
  if (isInvalid()) return false;
  return fs.delete(this);
}

public boolean setReadOnly() {
  if (isInvalid()) return false;
  return fs.setReadOnly(this);
}

public boolean setExecutable(boolean executable, boolean ownerOnly) {
  if (isInvalid()) return false;
  return fs.setPermission(this, FileSystem.ACCESS_EXECUTE, executable, ownerOnly);
}

@Deprecated
public URL toURL() throws MalformedURLException {
  if (isInvalid()) throw new MalformedURLException("Invalid file path");
  return new URL("file", "", slashify(getAbsolutePath(), isDirectory()));
}

public boolean setLastModified(long time) {
  if (time < 0) throw new IllegalArgumentException("Negative time");
  if (isInvalid()) return false;
  return fs.setLastModifiedTime(this, time);
}

public boolean isHidden() {
  if (isInvalid()) return false;
  return ((fs.getBooleanAttributes(this) & FileSystem.BA_HIDDEN) != 0);
}

public boolean setReadable(boolean readable, boolean ownerOnly) {
  if (isInvalid()) return false;
  return fs.setPermission(this, FileSystem.ACCESS_READ, readable, ownerOnly);
}

public long getFreeSpace() {
  if (isInvalid()) return 0L;
  return fs.getSpace(this, FileSystem.SPACE_FREE);
}

public long getUsableSpace() {
  if (isInvalid()) return 0L;
  return fs.getSpace(this, FileSystem.SPACE_USABLE);
}

public boolean mkdir() {
  if (isInvalid()) return false;
  return fs.createDirectory(this);
}

public String getCanonicalPath() throws IOException {
  if (isInvalid()) throw new IOException("Invalid file path");
  return fs.canonicalize(fs.resolve(this));
}

public FileOutputStream(File file, boolean append) throws FileNotFoundException {
  String name = (file != null ? file.getPath() : null);
  if (name == null) throw new NullPointerException();
  if (file.isInvalid()) throw new FileNotFoundException("Invalid file path");
  this.fd = new FileDescriptor();
  this.append = append;
  this.path = name;
  jfd = JTranscSyncIO.impl.open(name, JTranscSyncIO.O_RDWR);
  if (append) {
    jfd.setPosition(jfd.getLength());
  }
}