D-Net

import eu.dnetlib.miscutils.functional.hash.Hashing;

import eu.dnetlib.oai.BadResumptionTokenException;

		final String escapedQuery = StringEscapeUtils.escapeXml11(query);

		final List<String> info =

				Arrays.asList("" + nMaxElements, metadataPrefix, escapedQuery, "" + nRead, lastObjIdentifier, "" + hasDateRange, requestedSet);

		String s = StringUtils.join(info, "|");

		while ((s.length() % 3) != 0) {

			s += " "; // If the length is multiple of 3 the base64 does not contain the padding chars (=)

		}

		return Hashing.encodeBase64(s);

		final String[] info = Hashing.decodeBase64(token).trim().split("\\|");

		if (info.length < 6) { throw new BadResumptionTokenException(token); }

		nMaxElements = Integer.parseInt(info[0]);

		metadataPrefix = info[1];

		final String unescapedQuery = StringEscapeUtils.unescapeXml(info[2]);

		query = unescapedQuery;

		nRead = Integer.parseInt(info[3]);

		lastObjIdentifier = info[4];

		hasDateRange = Boolean.valueOf(info[5]);

			requestedSet = info[6];

		return hasDateRange;