D-Net

package eu.dnetlib.miscutils.functional.xml;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

import java.util.GregorianCalendar;

import java.util.Random;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import com.google.common.base.Joiner;

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

import org.apache.commons.lang3.StringUtils;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

/**

 * This class provides some XSLT functions.

 * 

 * <xsl:stylesheet ... xmlns:dnet="eu.dnetlib.miscutils.functional.xml.DnetXsltFunctions"> ... </xsl:stylesheet>

 * 

 * @author michele

 * 

 */

public class DnetXsltFunctions {

	private static final Log log = LogFactory.getLog(DnetXsltFunctions.class); // NOPMD by marko on 11/24/08 5:02 PM

	private static volatile long seedUniquifier = 8682522807148012L;

	private static String[] dateFormats = { "yyyy-MM-dd", "yyyy/MM/dd" };

	private static final String[] normalizeDateFormats = { "yyyy-MM-dd'T'hh:mm:ss", "yyyy-MM-dd", "yyyy/MM/dd", "yyyy" };

	private static final String normalizeOutFormat = new String("yyyy-MM-dd'T'hh:mm:ss'Z'");

	public static String extractYear(String s) throws ParseException {

		Calendar c = new GregorianCalendar();

		for (String format : dateFormats) {

			try {

				c.setTime(new SimpleDateFormat(format).parse(s));

				String year = String.valueOf(c.get(Calendar.YEAR));

				return year;

			} catch (ParseException e) {}

		}

		return "";

	}

	public static String normalizeDate(final String s, final boolean strict) {

		final String date = s != null ? s.trim() : "";

		for (String format : normalizeDateFormats) {

			try {

				Date parse = new SimpleDateFormat(format).parse(date);

				String res = new SimpleDateFormat(normalizeOutFormat).format(parse);

				return res;

			} catch (ParseException e) {}

		}

		if (strict) {

			throw new IllegalArgumentException("unable to normalize date: " + date);

		} else {

			//log.warn("unable to normalize date: " + s);

			return "";

		}

	}

	public static String randomInt(int max) {

		return String.valueOf(new Random(++seedUniquifier + System.nanoTime()).nextInt(max));

	}

	public static String md5(String s) {

		return Hashing.md5(s);

	}

	public static String decodeBase64(String s) {

		return Hashing.decodeBase64(s);

	}

	public static String encodeBase64(String s) {

		return Hashing.encodeBase64(s);

	}

	public static String lc(String s) {

		return s.toLowerCase();

	}

	public static String uc(String s) {

		return s.toUpperCase();

	}

	public static String decade(String s) {

		String res = _decade(s.trim());

		log.debug(s + "--> " + res);

		return res;

	}

	private static String _decade(String s) {

		Matcher m1 = Pattern.compile("(\\d\\d\\d)\\d").matcher(s);

		if (m1.find()) {

			String part = m1.group(1);

			return part + "0-" + part + "9";

		}

		Matcher m2 = Pattern.compile("(\\d)\\d").matcher(s);

		if (m2.find()) {

			String part = m2.group(1);

			return "19" + part + "0-19" + part + "9";

		}

		return "n/a";

	}

	public static String join(final String s1, final String separator, final String s2) {

		if(StringUtils.isBlank(s1) || StringUtils.isBlank(s2)){

			return "";

		}

		return Joiner.on(separator).join(s1, s2);

	}

	public static String pickFirst(final String s1, final String s2) {

		return StringUtils.isNotBlank(s1) ? s1 : StringUtils.isNotBlank(s2) ? s2 : "";

	}

}