Fess provides built-in support and compatibility layers for:

- **Google Search Appliance (GSA)** - Configuration import and API compatibility
- **Google Site Search (GSS) / Google Custom Search (CSE)** - JavaScript replacement
- **Elasticsearch / OpenSearch** - Direct data migration via bulk APIs
- **Apache Solr** - Document import via REST API
- **Database Systems** - Direct connection via DataStore plugins

   *     the thread's interrupt status is set
   */
  public abstract V load(K key) throws Exception;

  /**
   * Computes or retrieves a replacement value corresponding to an already-cached {@code key}. This
   * method is called when an existing cache entry is refreshed by {@link
   * CacheBuilder#refreshAfterWrite}, or through a call to {@link LoadingCache#refresh}.
   *

   * Returns a hash code for {@code value}; obsolete alternative to {@link
   * Character#hashCode(char)}.
   *
   * @param value a primitive {@code char} value
   * @return a hash code for the value
   */
  @InlineMe(replacement = "Character.hashCode(value)")
  @InlineMeValidationDisabled(
      "The hash code of a char is the int version of the char itself, so it's simplest to return"
          + " that.")
  public static int hashCode(char value) {

  /**
   * Returns a hash code for {@code value}; obsolete alternative to {@link Short#hashCode(short)}.
   *
   * @param value a primitive {@code short} value
   * @return a hash code for the value
   */
  @InlineMe(replacement = "Short.hashCode(value)")
  @InlineMeValidationDisabled(
      "The hash code of a short is the int version of the short itself, so it's simplest to return"
          + " that.")
  public static int hashCode(short value) {

  /**
   * Returns a hash code for {@code value}; obsolete alternative to {@link Short#hashCode(short)}.
   *
   * @param value a primitive {@code short} value
   * @return a hash code for the value
   */
  @InlineMe(replacement = "Short.hashCode(value)")
  @InlineMeValidationDisabled(
      "The hash code of a short is the int version of the short itself, so it's simplest to return"
          + " that.")
  public static int hashCode(short value) {

final class CompactLinkedHashMap<K extends @Nullable Object, V extends @Nullable Object>
    extends CompactHashMap<K, V> {
  // TODO(lowasser): implement removeEldestEntry so this can be used as a drop-in replacement

  /** Creates an empty {@code CompactLinkedHashMap} instance. */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      CompactLinkedHashMap<K, V> create() {
    return new CompactLinkedHashMap<>();

 * obtaining a token and logging in using the provided credentials.
 *
 * <p>This class supports both GET and POST methods for token and login
 * requests. It also allows for the replacement of placeholders in URLs and
 * parameters with actual credentials.
 *
 * <p>Usage example:
 * <pre>
 * {@code
 * Map<String, String> params = new HashMap<>();
 * params.put("token_url", "http://example.com/token");

   *     negated or reversed, undo the negation or reversal and use {@link #compareTrueFirst}.
   * @since 19.0
   */
  @InlineMe(replacement = "this.compareFalseFirst(left, right)")
  @Deprecated
  public final ComparisonChain compare(Boolean left, Boolean right) {
    return compareFalseFirst(left, right);
  }

  /**

            assertEquals(third, first.next());
            assertEquals(second, third.next());
            assertEquals(first, second.next());
        }

        @Test
        @DisplayName("Should handle cache replacement in complex scenario")
        void testComplexCacheReplacement() {
            Map<String, DfsReferralDataInternal> cache = new HashMap<>();

            // Create multiple entries

   * Returns a hash code for {@code value}; obsolete alternative to {@link
   * Character#hashCode(char)}.
   *
   * @param value a primitive {@code char} value
   * @return a hash code for the value
   */
  @InlineMe(replacement = "Character.hashCode(value)")
  @InlineMeValidationDisabled(
      "The hash code of a char is the int version of the char itself, so it's simplest to return"
          + " that.")
  public static int hashCode(char value) {