}
    }

    public String decodeSimilarDocHash(final String hash) {
        if (hash != null && hash.startsWith(SIMILAR_DOC_HASH_PREFIX) && hash.length() > SIMILAR_DOC_HASH_PREFIX.length()) {
            final byte[] decode = Base64.getUrlDecoder().decode(hash.substring(SIMILAR_DOC_HASH_PREFIX.length()));
            try (BufferedReader reader =

        String hash = "01010101010101010101010101010101";
        String value = "$H4sIAAAAAAAA_zMwNMALAXC7sg0gAAAA";
        assertEquals(value, documentHelper.encodeSimilarDocHash(hash));
        hash = "00101010010010100100101010001010";
        value = "$H4sIAAAAAAAA_zMwMARDCELQQApMAgAi5-3LIAAAAA";
        assertEquals(value, documentHelper.encodeSimilarDocHash(hash));

        final StringBuilder buf = new StringBuilder(50);
        for (int i = 0; i < docid.length(); i += splitSize) {
            int hash = docid.substring(i).hashCode() % splitHashSize;
            if (hash < 0) {
                hash *= -1;
            }
            buf.append('_').append(Integer.toString(hash)).append('/');
        }
        buf.append(docid).append('.').append(imageExtention);
        return buf.toString();
    }

    }

    public void test_normalizeConfigPath() {
        assertEquals("", systemHelper.normalizeConfigPath(""));
        assertEquals("", systemHelper.normalizeConfigPath("#hash"));
        assertEquals(".*\\Qwww.domain.com/test\\E.*", systemHelper.normalizeConfigPath("contains:www.domain.com/test"));
        assertEquals(".*\\Q/test/\\E.*", systemHelper.normalizeConfigPath("contains:/test/"));