// Key rotation configuration
    private long keyRotationIntervalMillis = 3600000L; // 1 hour default
    private final Map<String, Long> keyCreationTimes = new ConcurrentHashMap<>();
    private final Map<String, Integer> keyVersions = new ConcurrentHashMap<>();
    private final java.util.concurrent.ScheduledExecutorService rotationScheduler =
            java.util.concurrent.Executors.newSingleThreadScheduledExecutor(r -> {

    return delegateOrNull() != null;
  }

  /** Stores the hash table mask as the number of bits needed to represent an index. */
  private void setHashTableMask(int mask) {
    int hashTableBits = Integer.SIZE - Integer.numberOfLeadingZeros(mask);
    metadata =
        CompactHashing.maskCombine(metadata, hashTableBits, CompactHashing.HASH_TABLE_BITS_MASK);
  }

   * {@code Map<T, Something>} to {@code Map<String, Something>} etc. Similarly, {@code formal} and
   * {@code actual} can be {@code Map<K, V>} and {@code Map<String, Integer>} respectively, or they
   * can be {@code E[]} and {@code String[]} respectively, or even any arbitrary combination
   * thereof.
   *

   * example, {@code repeat("hey", 3)} returns the string {@code "heyheyhey"}.
   *
   * @param string any non-null string
   * @param count the number of times to repeat it; a nonnegative integer
   * @return a string containing {@code string} repeated {@code count} times (the empty string if
   *     {@code count} is zero)
   * @throws IllegalArgumentException if {@code count} is negative
   */

     * @param form the search form
     * @return HTML response for the list page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse list(final OptionalThing<Integer> pageNumber, final SearchForm form) {
        pageNumber.ifPresent(num -> {
            fileAuthenticationPager.setCurrentPageNumber(pageNumber.get());
        }).orElse(() -> {

     * @return HTML response with the request header list
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse list(final OptionalThing<Integer> pageNumber, final SearchForm form) {
        pageNumber.ifPresent(num -> {
            reqHeaderPager.setCurrentPageNumber(pageNumber.get());
        }).orElse(() -> {
            reqHeaderPager.setCurrentPageNumber(0);

            bb.putShort((short) 0);
            bb.putShort((short) 0);

            buffer.decode(testBuffer, 0, testBuffer.length);

            assertEquals(7, buffer.getPathConsumed()); // 15 / 2 = 7 (integer division)
        }
    }

    private final int maxAnalyzedContentLength;

    /**
     * Constructor.
     */
    public DefaultContentsParser() {
        maxAnalyzedContentLength = Integer.getInteger("fess.suggest.max.analyzed.content.length", 1000);
    }

    @Override
    public SuggestItem parseSearchWords(final String[] words, final String[][] readings, final String[] fields, final String[] tags,

  }

  private static int mixK1(int k1) {
    k1 *= C1;
    k1 = Integer.rotateLeft(k1, 15);
    k1 *= C2;
    return k1;
  }

  private static int mixH1(int h1, int k1) {
    h1 ^= k1;
    h1 = Integer.rotateLeft(h1, 13);
    h1 = h1 * 5 + 0xe6546b64;
    return h1;
  }

  // Finalization mix - force all bits of a hash block to avalanche

        Runnable r,
        Number n,
        Iterable<?> it,
        boolean b,
        Equivalence<String> eq,
        Exception e,
        InputStream in,
        Comparable<?> c,
        Ordering<Integer> ord,
        Charset charset,
        TimeUnit unit,
        Class<?> cls,
        Joiner joiner,
        Pattern pattern,
        UnsignedInteger ui,
        UnsignedLong ul,
        StringBuilder sb,