/** WAVE DASH */
    public static final char WAVE_DASH = '\u301C';

    /** FULLWIDTH TILDE */
    public static final char FULLWIDTH_TILDE = '\uFF5E';

    /** DOUBLE VERTICAL LINE */
    public static final char DOUBLE_VERTICAL_LINE = '\u2016';

    /** PARALLEL TO */
    public static final char PARALLEL_TO = '\u2225';

    /** MINUS SIGN */
    public static final char MINUS_SIGN = '\u2212';

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;

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

        StringBuffer sb = new StringBuffer();
        String n = name;

        // fix MSBROWSE name
        if( n == null ) {
            n = "null";
        } else if( n.charAt( 0 ) == 0x01 ) {
            char c[] = n.toCharArray();
            c[0] = '.';
            c[1] = '.';
            c[14] = '.';
            n = new String( c );
        }

    private String unescape(final String s) {
        if (s.indexOf('\\') >= 0) {
            final StringBuilder sb = new StringBuilder();
            for (int i = 0; i < s.length(); i++) {
                final char ch = s.charAt(i);
                if (ch == '\\' && i < s.length() - 1) {
                    i++;
                    sb.append(s.charAt(i));
                } else {
                    sb.append(ch);

            throw new PACDecodingException("Malformed string in PAC");

        this.dis.skip(unusedChars * 2);
        char[] chars = new char[usedChars];
        for ( int l = 0; l < usedChars; l++ )
            chars[ l ] = (char) readShort();

        return new String(chars);
    }


    public SID readId () throws IOException, PACDecodingException {
        byte[] bytes = new byte[4];

        if (zterm) {
            buffer[i] = (short)0;
        }
    }

    public String toString() {
        int len = length / 2 - (zterm ? 1 : 0);
        char[] ca = new char[len];
        for (int i = 0; i < len; i++) {
            ca[i] = (char)buffer[i];
        }
        return new String(ca, 0, len);
    }

                .map(HttpServletRequest::getCharacterEncoding).orElse(Constants.UTF_8);
        final StringBuilder buf = new StringBuilder(url.length() + 100);
        for (final char c : url.toCharArray()) {
            if (CharUtil.isUrlChar(c)) {
                buf.append(c);
            } else {
                try {
                    buf.append(URLEncoder.encode(String.valueOf(c), enc));

    private String unescape(final String s) {
        if (s.indexOf('\\') >= 0) {
            final StringBuilder sb = new StringBuilder();
            for (int i = 0; i < s.length(); i++) {
                final char ch = s.charAt(i);
                if (ch == '\\' && i < s.length() - 1) {
                    i++;
                    sb.append(s.charAt(i));
                } else {
                    sb.append(ch);

     */
    public static String toHexString ( int val, int size ) {
        char[] c = new char[size];
        toHexChars(val, c, 0, size);
        return new String(c);
    }


    /**
     * @param val
     * @param size
     * @return hex string
     */
    public static String toHexString ( long val, int size ) {
        char[] c = new char[size];
        toHexChars(val, c, 0, size);
        return new String(c);

        }
    }


    @Override
    public String toString () {
        int len = this.length / 2 - ( this.zterm ? 1 : 0 );
        char[] ca = new char[len];
        for ( int i = 0; i < len; i++ ) {
            ca[ i ] = (char) this.buffer[ i ];
        }
        return new String(ca, 0, len);
    }