return !isEmpty(text);
    }

    /**
     * Replaces all occurrences of a substring within a string with another string.
     *
     * @param text
     *            The original string.
     * @param fromText
     *            The substring to be replaced.
     * @param toText
     *            The replacement substring.
     * @return The resulting string after replacements.
     */

        if (lower.startsWith(allowPrefix)) {
            lower = lower.substring(allowPrefix.length());
            permission = permission.substring(allowPrefix.length());
            aclPrefix = StringUtil.EMPTY;
        } else if (lower.startsWith(denyPrefix)) {
            lower = lower.substring(denyPrefix.length());
            permission = permission.substring(denyPrefix.length());

    // pool ID but a thread ID of 2.
    Thread thread2 = threadFactory.newThread(monitoredRunnable);
    checkThreadPoolName(thread2, 2);
    assertEquals(
        thread.getName().substring(0, thread.getName().lastIndexOf('-')),
        thread2.getName().substring(0, thread.getName().lastIndexOf('-')));

    // Building again should give us a different pool ID.
    ThreadFactory threadFactory2 = builder.build();

        out.append(format.normalizeFirstWord(s.substring(i, j)));
      } else {
        requireNonNull(out).append(format.normalizeWord(s.substring(i, j)));
      }
      out.append(format.wordSeparator);
      i = j + wordSeparator.length();
    }
    return (i == 0)
        ? format.normalizeFirstWord(s)
        : requireNonNull(out).append(format.normalizeWord(s.substring(i))).toString();
  }

  /**

        String url = u;
        final String originalUrl = url;

        int idx = url.indexOf("://");
        if (idx >= 0) {
            url = url.substring(idx + 3);
        }

        idx = url.indexOf('/');
        if (idx >= 0) {
            url = url.substring(0, idx);
        }

        if (url.equals(originalUrl)) {
            return getFessConfig().getCrawlerDocumentUnknownHostname();
        }

    // pool ID but a thread ID of 2.
    Thread thread2 = threadFactory.newThread(monitoredRunnable);
    checkThreadPoolName(thread2, 2);
    assertEquals(
        thread.getName().substring(0, thread.getName().lastIndexOf('-')),
        thread2.getName().substring(0, thread.getName().lastIndexOf('-')));

    // Building again should give us a different pool ID.
    ThreadFactory threadFactory2 = builder.build();

        out.append(format.normalizeFirstWord(s.substring(i, j)));
      } else {
        requireNonNull(out).append(format.normalizeWord(s.substring(i, j)));
      }
      out.append(format.wordSeparator);
      i = j + wordSeparator.length();
    }
    return (i == 0)
        ? format.normalizeFirstWord(s)
        : requireNonNull(out).append(format.normalizeWord(s.substring(i))).toString();
  }

  /**

            String[] alphabets;
            if (i + 1 < text.length() && CONVERT_MAP.get(text.substring(i, i + 2)) != null) {
                alphabets = CONVERT_MAP.get(text.substring(i, i + 2));
                i += 2;
            } else {
                if (CONVERT_MAP.get(text.substring(i, i + 1)) != null) {
                    alphabets = CONVERT_MAP.get(text.substring(i, i + 1));
                } else {

        }
        if (s.startsWith("^") && s.endsWith("$")) {
            return "^" + Pattern.quote(s.substring(1, s.length() - 1)) + "$";
        }
        if (s.startsWith("^")) {
            return "^" + Pattern.quote(s.substring(1));
        }
        if (s.endsWith("$")) {
            return Pattern.quote(s.substring(0, s.length() - 1)) + "$";
        }
        return Pattern.quote(s);
    }

    /**

            final String value = decodeUrlAsName(url.substring(9), true);
            return abbreviateSite("\\\\" + value.replace('/', '\\'));
        }
        if (url.startsWith("file:")) {
            final String value = decodeUrlAsName(url.substring(5), true);
            if (value.length() > 2 && value.charAt(2) == ':') {
                // Windows
                return abbreviateSite(value.substring(1).replace('/', '\\'));
            }