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 org.apache.commons.lang3.StringUtils;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

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

import org.springframework.util.Assert;

/**

 * This class provides some XSLT functions.

 * 

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

 *

 * For using in Saxon HE, methods in this class are becoming classes extending ExtensionFunctionDefinition in package eu.dnetlib.saxon.ext

 * 

 * @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 "";

		}

	}

	/**

	 * TODO: this function seems not to be used.

	 * @param max

	 * @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);

	}

	/**

	 * TODO: this function seems not to be used.

	 * @param s

	 * @return

	 */

	public static String decodeBase64(String s) {

		return Hashing.decodeBase64(s);

	}

	/**

	 * TODO: this function seems not to be used.

	 * @param s

	 * @return

	 */

	public static String encodeBase64(String s) {

		return Hashing.encodeBase64(s);

	}

	/**

	 * TODO: this function seems not to be used.

	 * @param s

	 * @return

	 */

	public static String lc(String s) {

		return s.toLowerCase();

	}

	/**

	 * TODO: this function seems not to be used.

	 * @param s

	 * @return

	 */

	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";

	}

	// ENVELOPE(-10, 20, 15, 10) which is minX, maxX, maxY, minY order

	public static String normalizeSolrBBox(final String box) {

		if (StringUtils.isBlank(box)) return "";

		final String[] split = box.trim().split(" ");

		if (split == null) return  "";

		try {

			Assert.isTrue(split.length == 4, "all 4 coordinates are present");

			// Rect(minX=-180.0,maxX=180.0,minY=-90.0,maxY=90.0)

			Assert.isTrue(Double.parseDouble(split[1]) >= -180.0, "minX=-180");

			Assert.isTrue(Double.parseDouble(split[3]) <=  180.0, "maxX= 180");

			Assert.isTrue(Double.parseDouble(split[0]) >= -90.0, "minY= -90");

			Assert.isTrue(Double.parseDouble(split[2]) <=  90.0, "maxY=  90");

			//maxY must be >= minY: 90.0 to -90.0

			Assert.isTrue(Double.parseDouble(split[2]) >= Double.parseDouble(split[0]), "maxY must be >= minY");

			//maxX must be >= minX: 180.0 to -180.0

			Assert.isTrue(Double.parseDouble(split[3]) >= Double.parseDouble(split[1]), "maxX must be >= minX");

		} catch (IllegalArgumentException e) {

			//System.err.println(String.format("document %s has %s coordinates: %s", d.getDNGF().getEntity().getId(), split.length, e.getMessage()));

			return "";

		}

		return String.format("ENVELOPE(%s, %s, %s, %s)", split[1], split[3], split[2], split[0]);

	}

}