D-Net

import java.io.StringWriter;

import java.util.Collection;

import java.util.stream.Collectors;

import org.apache.commons.lang3.StringUtils;

import eu.dnetlib.data.mdstore.plugins.objects.MdRecord;

	public static String asCsv(final MdRecord record) {

		final StringWriter sw = new StringWriter();

		sw.append(record.getId());

		sw.append("\t");

		sw.append(record.getTitle());

		sw.append("\t");

		sw.append(prepareValue(record.getCreators()));

		sw.append("\t");

		sw.append(record.getPublisher());

		sw.append("\t");

		sw.append(record.getType());

		sw.append("\t");

		sw.append("" + record.getDate());

		sw.append("\t");

		sw.append(prepareValue(record.getDois()));

		return sw.toString();

	private static String prepareValue(final Collection<String> list) {

		return list.stream().map(String::trim).filter(StringUtils::isNotBlank).collect(Collectors.joining(", "));

	}