* according to RFC 1035.
   *
   * @return Is the domain name syntactically valid?
   */
  private static boolean validateSyntax(List<String> parts) {
    int lastIndex = parts.size() - 1;

    // Validate the last part specially, as it has different syntax rules.

    if (!validatePart(parts.get(lastIndex), true)) {
      return false;
    }

    for (int i = 0; i < lastIndex; i++) {

 * stale).
 */
class CacheStrategy internal constructor(
  /** The request to send on the network, or null if this call doesn't use the network. */
  val networkRequest: Request?,
  /** The cached response to return or validate; or null if this call doesn't use a cache. */
  val cacheResponse: Response?,
) {
  class Factory(
    private val nowMillis: Long,
    internal val request: Request,
    private val cacheResponse: Response?,
  ) {

      when (expected) {
        is SSLHandshakeException -> {
          // On Android, the handshake fails before the certificate pinner runs.
          assertThat(expected.message!!).contains("Could not validate certificate")
        }
        is SSLPeerUnverifiedException -> {
          // On OpenJDK, the handshake succeeds but the certificate pinner fails.

        isBind = false;
    }

    /**
     * Validates the LDAP connection.
     *
     * @return True if the LDAP connection is valid, otherwise false.
     */
    protected boolean validate() {
        if (!isBind) {
            if (fessConfig.getLdapAdminSecurityPrincipal() == null || fessConfig.getLdapAdminSecurityCredentials() == null) {
                // no credentials

        }
    }

    /**
     * Attempts to obtain login credentials using SPNEGO authentication.
     *
     * This method processes the HTTP request to extract and validate SPNEGO
     * authentication tokens. It handles the SPNEGO handshake process and
     * extracts the user principal from successful authentication.
     *

        return crawlingConfig.getConfigParameterMap(config);
    }

    /**
     * Validates if the given URL string is a valid URL.
     *
     * @param urlStr the URL string to validate
     * @return true if the URL is valid, false otherwise
     */
    protected boolean isValidUrl(final String urlStr) {
        if (StringUtil.isBlank(urlStr)) {
            return false;
        }

       *
       * Well, really, we use this when we think we're running under Java 8, as determined by some
       * logic in the static initializer, which does not check for getTypeName specifically. We
       * should really validate that it works as desired for all Android versions that we support.
       */
      @IgnoreJRERequirement
      @SuppressWarnings("AndroidJdkLibsChecker")
      @Override
      String typeName(Type type) {

## 🏗️ Architecture & Design Patterns

### Core Design Principles
CoreLib follows a **utility-class pattern** where most functionality is exposed through static methods:

- **Assertion-based validation** - All methods validate inputs using `AssertionUtil.assertArgumentNotNull()` and `AssertionUtil.assertArgumentNotEmpty()`

    /**
     * If the delegate collection is empty, but the multimap has values for the key, replace the
     * delegate with the new collection for the key.
     *
     * <p>For a subcollection, refresh its ancestor and validate that the ancestor delegate hasn't
     * changed.
     */
    void refreshIfEmpty() {
      if (ancestor != null) {
        ancestor.refreshIfEmpty();
        if (ancestor.getDelegate() != ancestorDelegate) {

name="'+h+'"]');if(!i.length)return a.formUtils.warn('Password confirmation validator: could not find an input with name "'+h+'"',!0),!1;if(g=i.val(),d.validateOnBlur&&!i[0].hasValidationCallback){i[0].hasValidationCallback=!0;var j=function(){c.validate()};i.on("keyup",j),f.one("formValidationSetup",function(){i[0].hasValidationCallback=!1,i.off("keyup",j)})}return b===g},errorMessage:"",errorMessageKey:"notConfirmed"});var c={amex:[15,15],diners_club:[14,14],cjb:[16,16],laser:[16,19],visa:[16,...