return new NeverScheduledFuture<>();
      }

      @Override
      public long getDelay(TimeUnit unit) {
        return Long.MAX_VALUE;
      }

      @Override
      public int compareTo(Delayed other) {
        return Long.compare(getDelay(NANOSECONDS), other.getDelay(NANOSECONDS));
      }
    }
  }

        return new NeverScheduledFuture<>();
      }

      @Override
      public long getDelay(TimeUnit unit) {
        return Long.MAX_VALUE;
      }

      @Override
      public int compareTo(Delayed other) {
        return Long.compare(getDelay(NANOSECONDS), other.getDelay(NANOSECONDS));
      }
    }
  }

     * This method calculates the appropriate delay for the current time
     * and applies it by sleeping the current thread.
     */
    public void delayByRules() {
        final long delay = getDelay();
        if (delay > 0) {
            ThreadUtil.sleep(delay);
        }
    }

    /**
     * Calculates the delay in milliseconds based on current time and configured rules.

      return new ImmediateScheduledFuture<>(immediateFailedFuture(t));
    }

    ImmediateScheduledFuture(ListenableFuture<V> delegate) {
      super(delegate);
    }

    @Override
    public long getDelay(TimeUnit unit) {
      return 0;
    }

    @Override
    public int compareTo(Delayed other) {
      return 0;
    }
  }

        throws InterruptedException, ExecutionException, TimeoutException {
      Preconditions.checkNotNull(unit, "unit must not be null!");
      return get();
    }

    @Override
    public long getDelay(TimeUnit unit) {
      Preconditions.checkNotNull(unit, "unit must not be null!");
      return 0;
    }

    @Override
    public int compareTo(Delayed other) {

        throws InterruptedException, ExecutionException, TimeoutException {
      Preconditions.checkNotNull(unit, "unit must not be null!");
      return get();
    }

    @Override
    public long getDelay(TimeUnit unit) {
      Preconditions.checkNotNull(unit, "unit must not be null!");
      return 0;
    }

    @Override
    public int compareTo(Delayed other) {

      implements ScheduledFuture<V> {
    @Override
    protected Future<V> delegate() {
      throw new UnsupportedOperationException("test should not care about this");
    }

    @Override
    public long getDelay(TimeUnit unit) {
      throw new UnsupportedOperationException("test should not care about this");
    }

    @Override
    public int compareTo(Delayed other) {

      implements ScheduledFuture<V> {
    @Override
    protected Future<V> delegate() {
      throw new UnsupportedOperationException("test should not care about this");
    }

    @Override
    public long getDelay(TimeUnit unit) {
      throw new UnsupportedOperationException("test should not care about this");
    }

    @Override
    public int compareTo(Delayed other) {

        assertEquals(2000, intervalControlHelper.getDelay());

        intervalControlHelper.ruleList.clear();

        intervalControlHelper.addIntervalRule("22:15", "2:45", "1", 3000);
        assertEquals(0, intervalControlHelper.getDelay());

        intervalControlHelper.addIntervalRule("22:15", "2:45", "2", 4000);
        assertEquals(4000, intervalControlHelper.getDelay());
    }

    @Test

           * that's possible to detect in general.
           */
        }
        return cancelled;
      }

      @Override
      public long getDelay(TimeUnit unit) {
        return scheduledDelegate.getDelay(unit);
      }

      @Override
      public int compareTo(Delayed other) {
        return scheduledDelegate.compareTo(other);
      }
    }