*
     * @return an Iterator over the elements in this set.
     * @see ConcurrentModificationException
     */
    @Override
    public Iterator<E> iterator() {
        return map.keySet().iterator();
    }

    /**
     * Returns the number of elements in this set (its cardinality).
     *
     * @return the number of elements in this set (its cardinality).
     */
    @Override

     * Cleanup method called when the bean is destroyed.
     * Stops all running processes and cleans up resources.
     */
    @PreDestroy
    public void destroy() {
        for (final String sessionId : runningProcessMap.keySet()) {
            if (logger.isInfoEnabled()) {
                logger.info("Stopping process {}", sessionId);
            }
            if (destroyProcess(sessionId) == 0 && logger.isInfoEnabled()) {

    }

    /**
     * Gets the set of all metadata keys.
     *
     * @return the set of metadata keys
     */
    public Set<String> getKeySet() {
        return metadata.keySet();
    }

    /**
     * Gets the extracted content.
     *
     * @return the extracted content
     */
    public String getContent() {
        return content;
    }

    /**

    }

    @Override
    public Enumeration<Object> keys() {
        return getProperties().keys();
    }

    @Override
    public Set<Object> keySet() {
        return getProperties().keySet();
    }

    @Override
    public void list(final PrintStream out) {
        getProperties().list(out);
    }

    @Override
    public void list(final PrintWriter out) {

            if (StringUtil.isBlank(value)) {
                list = Collections.emptyList();
            } else {
                final Set<String> keySet = new HashSet<>();
                list = split(value, "\n").get(stream -> stream.filter(StringUtil::isNotBlank).map(s -> {
                    final String[] pair = s.split("=");
                    if (pair.length == 1) {

                value = e.getValue().toString();
            }
            itemList.add(createItem(k, value));
        });
        if (fessConfig instanceof final ObjectiveConfig config) {
            config.keySet().stream().forEach(k -> {
                final String value;
                if (isMaskedValue(k)) {
                    value = MASKED_VALUE;
                } else {
                    value = config.get(k);

            final UserInfoBhv userInfoBhv = ComponentUtil.getComponent(UserInfoBhv.class);
            userInfoBhv.selectList(cb -> {
                cb.query().setId_InScope(userInfoMap.keySet());
                cb.fetchFirst(userInfoMap.size());
            }).forEach(userInfo -> {
                final String code = userInfo.getId();
                final UserInfo entity = userInfoMap.get(code);

        } catch (InterruptedException e) {
            scheduler.shutdownNow();
            Thread.currentThread().interrupt();
        }

        // Stop all change watchers
        for (String path : directoryCache.keySet()) {
            changeNotifier.stopWatching(path);
        }

        // Clear caches
        directoryCache.clear();
        leaseToPath.clear();
    }

    /**

     */
    public int forceRotateAllKeys() {
        checkNotClosed();

        int rotated = 0;
        java.util.List<String> sessionIds = new java.util.ArrayList<>(sessionKeys.keySet());

        for (String sessionId : sessionIds) {
            // Skip archived keys
            if (!sessionId.contains(".v")) {
                try {
                    rotateSessionKey(sessionId);

            if (!path.equals("\\")) {
                key += path;
            }
            key = key.toLowerCase();

            final Iterator iter = referrals.map.keySet().iterator();
            while (iter.hasNext()) {
                final String _key = (String) iter.next();
                final int _klen = _key.length();
                boolean match = false;