* to determine if a given response data matches the rule, retrieve the rule's identifier,
 * and obtain the associated response processor.
 */
public interface Rule extends Serializable {

    /**
     * Determines if the given response data matches the rule.
     *
     * @param responseData the response data to be evaluated
     * @return true if the response data matches the rule, false otherwise
     */

     *
     * @see
     * org.codelibs.fess.crawler.rule.RuleManager#addRule(org.codelibs.fess.crawler.rule.Rule)
     */
    /**
     * Adds a rule to the end of the rule list.
     * @param rule the rule to add
     */
    @Override
    public void addRule(final Rule rule) {
        ruleList.add(rule);
    }

    /**
     * Adds a rule at the specified position in the rule list.
     * @param index the position to insert the rule

        public void addRule(int index, Rule rule) {
            if (rule != null) {
                rules.add(index, rule);
            }
        }

        @Override
        public boolean removeRule(Rule rule) {
            return rules.remove(rule);
        }

        @Override
        public boolean hasRule(Rule rule) {
            return rules.contains(rule);
        }
    }

    /**

        while (!source.exhausted()) {
          var rule: ByteString = source.readUtf8LineStrict().toRule() ?: continue

          if (rule.startsWith(EXCEPTION_RULE_MARKER)) {
            rule = rule.substring(1)
            // We use '\n' for end of value.
            totalExceptionRuleBytes += rule.size + 1
            sortedExceptionRules.add(rule)
          } else {
            totalRuleBytes += rule.size + 1 // We use '\n' for end of value.

        assertTrue(rule.isTarget(12, 30, 3)); // 12:30 on Tuesday
        assertTrue(rule.isTarget(12, 30, 5)); // 12:30 on Thursday

        // Within time range but not matching day
        assertFalse(rule.isTarget(12, 30, 2)); // 12:30 on Monday
        assertFalse(rule.isTarget(12, 30, 4)); // 12:30 on Wednesday
        assertFalse(rule.isTarget(12, 30, 6)); // 12:30 on Friday
        assertFalse(rule.isTarget(12, 30, 7)); // 12:30 on Saturday

    /**
     * Returns whether this rule is a default rule that matches all responses.
     * @return true if this is a default rule, false otherwise
     */
    public boolean isDefaultRule() {
        return defaultRule;
    }

    /**
     * Sets whether this rule should be a default rule that matches all responses.
     * @param defaultRule true to make this a default rule, false otherwise
     */

    val rule = findMatchingRule(domainLabels)
    if (domainLabels.size == rule.size && rule[0][0] != EXCEPTION_MARKER) {
      return null // The domain is a public suffix.
    }

    val firstLabelOffset =
      if (rule[0][0] == EXCEPTION_MARKER) {
        // Exception rules hold the effective TLD plus one.
        domainLabels.size - rule.size
      } else {

    /**
     * Gets a boost document rule by its ID.
     * @param id The boost document rule ID.
     * @return Optional entity containing the boost document rule if found.
     */
    public OptionalEntity<BoostDocumentRule> getBoostDocumentRule(final String id) {
        return boostDocumentRuleBhv.selectByPK(id);
    }

    /**
     * Stores (inserts or updates) a boost document rule.

     */
    public void test_matchWithNullResponseData() {
        ConfigurableRule rule = new ConfigurableRule();
        rule.setRuleId("nullTest");
        rule.setResponseProcessor(new TestResponseProcessor("nullProcessor"));

        // Should handle null gracefully
        assertFalse(rule.match(null));
    }

    /**
     * Test Rule with null rule ID
     */

        final Rule rule = ruleManager.getRule(responseData);
        assertNotNull(rule);
        assertEquals("fileRule", rule.getRuleId());
        CloseableUtil.closeQuietly(responseData);
    }

    public void test_checkRule() {
        final Rule rule = ruleManager.getRule(new ResponseData());
        assertNotNull(rule);
        assertEquals("fileRule", rule.getRuleId());