* a file or directory that would be more accessible.
 */
@J2ktIncompatible
@GwtIncompatible
@J2ObjCIncompatible
abstract class TempFileCreator {
  static final TempFileCreator INSTANCE = pickSecureCreator();

  /**
   * @throws IllegalStateException if the directory could not be created (to implement the contract

     * system property.
     */

    String save = System.getProperty("user.name");
    System.setProperty("user.name", "-this-is-definitely-not-the-username-we-are-running-as//?");
    try {
      TempFileCreator.testMakingUserPermissionsFromScratch();
      assertThat(isJava8()).isFalse();
    } catch (IOException expectedIfJava8) {
      assertThat(isJava8()).isTrue();
    } finally {
      System.setProperty("user.name", save);

     * if so.
     */
    @GuardedBy("this")
    void update(int len) throws IOException {
      if (memory != null && (memory.getCount() + len > fileThreshold)) {
        File temp = TempFileCreator.INSTANCE.createTempFile("FileBackedOutputStream");
        if (resetWhenGarbageCollected) {
          // References are not guaranteed to be collected on system shutdown; this is insurance.
          temp.deleteOnExit();