case FILE -> ComponentUtil.getProtocolHelper().getFileProtocols();
        default -> throw new ConstraintDefinitionException("protocolType is empty or invalid: " + uriType.protocolType());
        };
    }

    @Override
    public boolean isValid(final String value, final ConstraintValidatorContext context) {
        if (StringUtil.isNotBlank(value)) {
            return check(protocols, value);
        }

     * @param in the input stream to validate
     * @return true if the stream contains valid sitemap data, false otherwise
     */
    public boolean isValid(final InputStream in) {
        return isValid(in, true);
    }

    /**
     * Checks if the given input stream contains valid sitemap data.
     * @param in the input stream to validate

        final java.lang.reflect.Method method = CrawlerThread.class.getDeclaredMethod("isValid", UrlQueue.class);
        method.setAccessible(true);
        final boolean result = (boolean) method.invoke(crawlerThread, urlQueue);

        assertTrue(result);
    }

    /**
     * Test isValid method with a null URL queue.
     */
    public void test_isValid_nullUrlQueue() throws Exception {

            // for invalid data, which is also acceptable
            assertNotNull("Exception message should not be null", e.getMessage());
        }
    }

    /**
     * Test that MsExcelExtractor throws appropriate exception for invalid data.
     * POI may throw various exceptions depending on the type of invalid data.
     */

        // Test GoodBot - should parse valid directives and ignore invalid ones
        assertNotNull(robotsTxt.getDirective("goodbot"));
        assertFalse(robotsTxt.allows("/admin/", "GoodBot"));
        assertTrue(robotsTxt.allows("/public/", "GoodBot"));
        // Invalid directives should not cause parsing to fail

        // Test crawl-delay with invalid values
        // Invalid number should be ignored, valid ones should work

        }
    }

    public void test_invalidTransliteratorId() {
        try {
            new ICUNormalizer("Invalid-Transliterator-ID-12345");
            fail("Expected IllegalArgumentException");
        } catch (IllegalArgumentException e) {
            assertTrue(e.getMessage().contains("Invalid transliterator ID"));
        }
    }

        assertTrue(sitemapsHelper.isValidChangefreq(null));
        assertTrue(sitemapsHelper.isValidChangefreq(""));

        // Invalid changefreq
        assertFalse(sitemapsHelper.isValidChangefreq("sometimes"));
        assertFalse(sitemapsHelper.isValidChangefreq("invalid"));

        // Valid date format
        assertTrue(sitemapsHelper.isValidDateFormat("2025-01-01"));

   *
   * @throws IllegalArgumentException if subtype is invalid
   */
  static MediaType createApplicationType(String subtype) {
    return create(APPLICATION_TYPE, subtype);
  }

  /**
   * Creates a media type with the "audio" type and the given subtype.
   *
   * @throws IllegalArgumentException if subtype is invalid
   */
  static MediaType createAudioType(String subtype) {

    }

    /**
     * Gets the pattern for matching invalid URLs.
     *
     * @return the invalid URL pattern
     */
    public Pattern getInvalidUrlPattern() {
        return invalidUrlPattern;
    }

    /**
     * Sets the pattern for matching invalid URLs.
     *
     * @param invalidUrlPattern the invalid URL pattern to set
     */

     * It will parse valid directives and ignore invalid ones, ensuring that partial
     * content can be extracted even from poorly formatted files.</p>
     *
     * <p>The following errors are handled gracefully (line is skipped, parsing continues):</p>
     * <ul>
     * <li>Invalid directive formats</li>
     * <li>Unknown directives</li>
     * <li>Invalid crawl-delay values (non-numeric, negative)</li>