}

  private static final class JdkMatcher extends CommonMatcher {
    final Matcher matcher;

    JdkMatcher(Matcher matcher) {
      this.matcher = Preconditions.checkNotNull(matcher);
    }

    @Override
    public boolean matches() {
      return matcher.matches();
    }

    @Override
    public boolean find() {
      return matcher.find();
    }

    @Override
    public boolean find(int index) {

        // Verify patterns work correctly
        assertTrue(includePatterns.get(0).matcher("http://example.com/page").matches());
        assertTrue(excludePatterns.get(0).matcher("http://example.com/admin/users").matches());
        assertFalse(excludePatterns.get(0).matcher("http://example.com/page").matches());

        urlFilterService.delete(sessionId);
    }

    }

    /**
     * Creates a path matcher function for path mapping.
     *
     * @param matcher the regex matcher
     * @param replacement the replacement string
     * @return the path matcher function
     */
    public BiFunction<String, Matcher, String> createPathMatcher(final Matcher matcher, final String replacement) { // for PathMapping

            return null;
        }

        for (final Map.Entry<Pattern, CrawlerClient> entry : clientMap.entrySet()) {
            final Matcher matcher = entry.getKey().matcher(urlKey);
            if (matcher.matches()) {
                return entry.getValue();
            }
        }
        return null;
    }

    /**
     * Sets the initialization parameter map for all clients.

      versionChecks.forEach { (versionMatcher, failureMatcher) ->
        if (versionMatcher.matches(PlatformVersion) && failureMatcher.matches(e)) {
          return
        }
      }

      throw e
    }

    fun failIfExpected() {
      versionChecks.forEach { (versionMatcher, failureMatcher) ->
        if (versionMatcher.matches(PlatformVersion)) {
          val description = StringDescription()

        // Get rule after removal
        matched = ruleManager.getRule(responseData);
        assertNull(matched); // No matching rule now

        // Add rule4 which matches
        ruleManager.addRule(rule4);
        matched = ruleManager.getRule(responseData);
        assertEquals("rule4", matched.getRuleId());
    }

    /**
     * Test rule replacement scenario
     */

import com.google.common.annotations.GwtCompatible;

/**
 * The subset of the {@link java.util.regex.Matcher} API which is used by this package, and also
 * shared with the {@code re2j} library. For internal use only. Please refer to the {@code Matcher}
 * javadoc for details.
 */
@GwtCompatible
abstract class CommonMatcher {
  public abstract boolean matches();

  public abstract boolean find();

  public abstract boolean find(int index);

        if (username.length() > MAX_USERNAME_LENGTH) {
            throw new IllegalArgumentException("Username exceeds maximum length: " + username.length());
        }
        if (!username.isEmpty() && !VALID_USERNAME.matcher(username).matches()) {
            throw new IllegalArgumentException("Username contains invalid characters: " + username);
        }
    }

    /**
     * Validates domain name
     *

     * Returns a filter for directories that may contain paths accepted by the given matcher.
     * The given path matcher should be an instance created by this service.
     * The path matcher returned by this method expects directory paths.
     * If that matcher returns {@code false}, then the directory will definitively not contain
     * the paths selected by the matcher given in argument to this method.

        if (!includeList.isEmpty()) {
            boolean match = false;
            for (final Pattern pattern : includeList) {
                final Matcher matcher = pattern.matcher(url);
                if (matcher.matches()) {
                    match = true;
                }
            }
            if (!match) {
                return false;
            }
        }