import org.codelibs.fess.util.ComponentUtil;

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;

public class PopularWordHelper {
    private static final Logger logger = LogManager.getLogger(PopularWordHelper.class);

    protected static final char CACHE_KEY_SPLITTER = '\n';

    protected Cache<String, List<String>> cache;

    protected FessConfig fessConfig;

    protected RoleQueryHelper roleQueryHelper;

    @Resource
    protected UserInfoHelper userInfoHelper;

    @Resource
    protected OsddHelper osddHelper;

    @Resource
    protected PopularWordHelper popularWordHelper;

    @Resource
    protected HttpServletRequest request;

    protected boolean searchLogSupport;

    protected boolean favoriteSupport;

    protected boolean thumbnailSupport;

    protected final Set<String> tagFieldNameSet = new HashSet<>();

    protected final Set<String> roleFieldNameSet = new HashSet<>();

    protected List<String> contentFieldList;

    protected PopularWordHelper popularWordHelper = null;

    protected long searchStoreInterval = 1; // min

    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {

	</component>
	<component name="userAgentHelper" class="org.codelibs.fess.helper.UserAgentHelper">
	</component>
	<component name="popularWordHelper" class="org.codelibs.fess.helper.PopularWordHelper">
	</component>
	<component name="userInfoHelper" class="org.codelibs.fess.helper.UserInfoHelper">
	</component>

import org.codelibs.fess.helper.NotificationHelper;
import org.codelibs.fess.helper.PathMappingHelper;
import org.codelibs.fess.helper.PermissionHelper;
import org.codelibs.fess.helper.PluginHelper;
import org.codelibs.fess.helper.PopularWordHelper;
import org.codelibs.fess.helper.ProcessHelper;
import org.codelibs.fess.helper.QueryHelper;
import org.codelibs.fess.helper.RelatedContentHelper;
import org.codelibs.fess.helper.RelatedQueryHelper;

        }
        final String[] fields = request.getParameterValues("field");

        final PopularWordHelper popularWordHelper = ComponentUtil.getPopularWordHelper();

        final StringBuilder buf = new StringBuilder(255);
        try {
            final List<String> popularWordList =
                    popularWordHelper.getWordList(SearchRequestType.JSON, seed, tags, null, fields, StringUtil.EMPTY_STRINGS);