be.fedict.commons.eid.consumer.tlv.DateOfBirthDataConvertor.java Source code

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Here is the source code for be.fedict.commons.eid.consumer.tlv.DateOfBirthDataConvertor.java

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/*
 * Commons eID Project.
 * Copyright (C) 2008-2013 FedICT.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version
 * 3.0 as published by the Free Software Foundation.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, see 
 * http://www.gnu.org/licenses/.
 */

package be.fedict.commons.eid.consumer.tlv;

import java.io.UnsupportedEncodingException;
import java.util.GregorianCalendar;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Convertor for eID date of birth field.
 * 
 * @author Frank Cornelis
 * 
 */
public class DateOfBirthDataConvertor implements DataConvertor<GregorianCalendar> {

    private static final Log LOG = LogFactory.getLog(DateOfBirthDataConvertor.class);

    @Override
    public GregorianCalendar convert(final byte[] value) throws DataConvertorException {
        String dateOfBirthStr;
        try {
            dateOfBirthStr = new String(value, "UTF-8").trim();
        } catch (final UnsupportedEncodingException uex) {
            throw new DataConvertorException("UTF-8 not supported");
        }
        LOG.debug("\"" + dateOfBirthStr + "\"");
        /*
         * First try to detect the German format as there are cases in which a
         * German format contains both dots and spaces.
         */
        int spaceIdx = dateOfBirthStr.indexOf('.');
        if (-1 == spaceIdx) {
            spaceIdx = dateOfBirthStr.indexOf(' ');
        }

        if (spaceIdx > 0) {
            final String dayStr = dateOfBirthStr.substring(0, spaceIdx);
            LOG.debug("day: \"" + dayStr + "\"");
            final int day = Integer.parseInt(dayStr);
            String monthStr = dateOfBirthStr.substring(spaceIdx + 1, dateOfBirthStr.length() - 4 - 1);
            if (monthStr.endsWith(".")) {
                monthStr = monthStr.substring(0, monthStr.length() - 1);
            }
            LOG.debug("month: \"" + monthStr + "\"");
            final String yearStr = dateOfBirthStr.substring(dateOfBirthStr.length() - 4);
            LOG.debug("year: \"" + yearStr + "\"");
            final int year = Integer.parseInt(yearStr);
            final int month = toMonth(monthStr);
            return new GregorianCalendar(year, month, day);
        }

        if (dateOfBirthStr.length() == 4) {
            /*
             * "case II2b2". Only a birth year is given
             * 
             * there's no way of representing "missing" fields via
             * GregorianCalendar, so we set Jan 1st
             */
            return new GregorianCalendar(Integer.parseInt(dateOfBirthStr), 0, 1);
        }

        throw new DataConvertorException("Unsupported Birth Date Format [" + dateOfBirthStr + "]");
    }

    private static final String[][] MONTHS = new String[][] { new String[] { "JAN" }, new String[] { "FEV", "FEB" },
            new String[] { "MARS", "MAAR", "MR" }, new String[] { "AVR", "APR" }, new String[] { "MAI", "MEI" },
            new String[] { "JUIN", "JUN" }, new String[] { "JUIL", "JUL" }, new String[] { "AOUT", "AUG" },
            new String[] { "SEPT", "SEP" }, new String[] { "OCT", "OKT" }, new String[] { "NOV" },
            new String[] { "DEC", "DEZ" } };

    private int toMonth(String monthStr) throws DataConvertorException {
        monthStr = monthStr.trim();
        for (int monthIdx = 0; monthIdx < MONTHS.length; monthIdx++) {
            final String[] monthNames = MONTHS[monthIdx];
            for (String monthName : monthNames) {
                if (monthName.equals(monthStr)) {
                    return monthIdx;
                }
            }
        }
        throw new DataConvertorException("unknown month: " + monthStr);
    }
}