&& !ListenableFuture.class.getName().equals(name)) {
              synchronized (loadedClasses) {
                Class<?> toReturn = loadedClasses.get(name);
                if (toReturn == null) {
                  toReturn = super.findClass(name);
                  loadedClasses.put(name, toReturn);
                }
                return toReturn;
              }
            }

      }
      return 0;
    }

    @Override
    public int add(E element, int occurrences) {
      checkArgument(occurrences >= 0);
      Integer frequency = backingMap.get(element);
      if (frequency == null) {
        frequency = 0;
      }
      if (occurrences == 0) {
        return frequency;
      }
      checkArgument(occurrences <= Integer.MAX_VALUE - frequency);

    }

    protected QueryBuilder buildMatchPhraseQuery(final String f, final String text) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        if (text == null || text.length() != 1
                || !fessConfig.getIndexFieldTitle().equals(f) && !fessConfig.getIndexFieldContent().equals(f)) {
            return QueryBuilders.matchPhraseQuery(f, text);
        }

 */
public abstract class SerializeUtil {

    private static final int BYTE_ARRAY_SIZE = 8 * 1024;

    /**
     * オブジェクトをシリアライズできるかテストします。
     *
     * @param obj
     *            シリアライズ対象のオブジェクト。{@literal null}であってはいけません
     * @return シリアライズして復元したオブジェクト
     */
    public static Object serialize(final Object obj) {
        assertArgumentNotNull("obj", obj);

        final byte[] binary = fromObjectToBinary(obj);

   * {@link #rightValue} are not equal, and one but not both of them may be null.
   *
   * @since 2.0
   */
  @DoNotMock("Use Maps.difference")
  interface ValueDifference<V extends @Nullable Object> {
    /** Returns the value from the left map (possibly null). */
    @ParametricNullness
    V leftValue();

    /** Returns the value from the right map (possibly null). */
    @ParametricNullness
    V rightValue();

    /**

  /**
   * Visits the given types. Null types are ignored. This allows subclasses to call {@code
   * visit(parameterizedType.getOwnerType())} safely without having to check nulls.
   */
  public final void visit(@Nullable Type... types) {
    for (Type type : types) {
      if (type == null || !visited.add(type)) {
        // null owner type, or already visited;
        continue;
      }

  }

  @Override
  public Optional<V> edgeValue(N nodeU, N nodeV) {
    return Optional.ofNullable(edgeValueOrDefault(nodeU, nodeV, null));
  }

  @Override
  public Optional<V> edgeValue(EndpointPair<N> endpoints) {
    return Optional.ofNullable(edgeValueOrDefault(endpoints, null));
  }

  @Override
  public final boolean equals(@CheckForNull Object obj) {
    if (obj == this) {
      return true;
    }

     * @return {@literal byte}の配列
     */
    public static byte[] toBinary(final Object o) {
        if (o instanceof byte[]) {
            return (byte[]) o;
        } else if (o == null) {
            return null;
        } else {
            assertArgument("o", o instanceof String, o.getClass().toString());
            return ((String) o).getBytes();
        }
    }

        for ( CharSequence element : elements ) {
            if ( sb.length() > 0 ) {
                if ( delimiter != null ) {
                    sb.append(delimiter);
                }
                else {
                    sb.append("null");
                }
            }
            sb.append(element);
        }
        return sb.toString();
    }

 */
public class FilenameExtractor extends AbstractExtractor {

    @Override
    public ExtractData getText(final InputStream in, final Map<String, String> params) {
        if (in == null) {
            throw new CrawlerSystemException("The inputstream is null.");
        }
        final String content = params.getOrDefault(ExtractData.RESOURCE_NAME_KEY, StringUtil.EMPTY);
        try {
            return new ExtractData(content);