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.
     * @param params The map of parameters.
     */

    /**
     * {@return whether the given matcher includes all files}.
     * This method may conservatively returns {@code false} if case of doubt.
     * A return value of {@code true} means that the pattern is certain to match all files.
     *
     * @param matcher the matcher to test
     */
    default boolean isIncludesAll(@Nonnull PathMatcher matcher) {
        return Objects.requireNonNull(matcher) == includesAll();
    }

        provides.put(type, matcher);
    }

    @Override
    public boolean matchesRequirements(Map<String, String> requirements) {
        for (Map.Entry<String, String> requirement : requirements.entrySet()) {
            String key = requirement.getKey();

            RequirementMatcher matcher = provides.get(key);

            if (matcher == null) {

        // Check various forms of directory traversal
        if (TRAVERSAL_PATTERN.matcher(path).find()) {
            return true;
        }

        // Check encoded traversals
        if (ENCODED_TRAVERSAL.matcher(path).find()) {
            return true;
        }

        // Check Unicode encoded traversals
        if (UNICODE_TRAVERSAL.matcher(path).find()) {
            return true;
        }

            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                String filename = file.getFileName().toString();
                if (mavenArtifactJar.matcher(filename).matches()) {
                    Process p = Runtime.getRuntime().exec(new String[] {
                        Paths.get(System.getProperty("java.home"), "bin/java").toString(),
                        "-jar",

     * @param pattern the pattern to match against
     * @param line the line to extract the value from
     * @return the extracted value, or null if no match
     */
    protected String getValue(final Pattern pattern, final String line) {
        final Matcher m = pattern.matcher(line);
        if (m.matches() && m.groupCount() > 0) {
            return m.group(1);
        }

            if (artifact.isSnapshot()) {
                Matcher matcher = Artifact.VERSION_FILE_PATTERN.matcher(artifact.getVersion());
                if (matcher.matches()) {
                    Snapshot snapshot = new Snapshot();
                    snapshot.setTimestamp(matcher.group(2));
                    try {
                        snapshot.setBuildNumber(Integer.parseInt(matcher.group(3)));

     * excluding the general "*" pattern which matches all bots.
     *
     * @param userAgent the user agent string to match against directives,
     *                 can be null (treated as empty string)
     * @return the most specific matching directive, or null if no directive matches
     */
    public Directive getMatchedDirective(final String userAgent) {

        assertFalse(auth.matches("ftp://hostname:111/"));
        assertFalse(auth.matches("ftp://hostname:xx/"));
        assertFalse(auth.matches("ftp://hoge/test/aaa.html"));
        assertFalse(auth.matches("ftp://hoge/test"));
        assertFalse(auth.matches("ftp://hoge/"));
        assertFalse(auth.matches("ftp://hoge"));
        assertFalse(auth.matches("ftp://"));
        assertFalse(auth.matches("http://hostname/"));

    // filter flags

    /**
     * Any file name change in the watched directory or subtree causes a change notification wait operation to return.
     * Changes include renaming, creating, or deleting a file.
     */
    int FILE_NOTIFY_CHANGE_FILE_NAME = 0x00000001;

    /**
     * Any directory-name change in the watched directory or subtree causes a change notification wait operation to