source: josm/trunk/src/org/openstreetmap/josm/data/osm/DateFormatter.java@ 2667

package org.openstreetmap.josm.data.osm;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;

/**
 * Outputs a date in a format suitable for an OSM XML file.
 *
 * @author Brett Henderson
 */
public class DateFormatter {

    private GregorianCalendar calendar;

    /**
     * Creates a new instance.
     */
    public DateFormatter() {
        calendar = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
    }

    /**
     * Formats a date in XML format.
     *
     * @param date
     *            The date to be formatted.
     * @return The string representing the date.
     */
    public String format(Date date) {
        StringBuilder result;
        int year;
        int month;
        int day;
        int hour;
        int minute;
        int second;

        calendar.setTime(date);

        result = new StringBuilder(20);

        year = calendar.get(Calendar.YEAR);
        month = calendar.get(Calendar.MONTH) + 1;
        day = calendar.get(Calendar.DATE);
        hour = calendar.get(Calendar.HOUR_OF_DAY);
        minute = calendar.get(Calendar.MINUTE);
        second = calendar.get(Calendar.SECOND);

        result.append(year);
        result.append('-');
        if (month < 10) {
            result.append('0');
        }
        result.append(month);
        result.append('-');
        if (day < 10) {
            result.append('0');
        }
        result.append(day);
        result.append('T');
        if (hour < 10) {
            result.append('0');
        }
        result.append(hour);
        result.append(':');
        if (minute < 10) {
            result.append('0');
        }
        result.append(minute);
        result.append(':');
        if (second < 10) {
            result.append('0');
        }
        result.append(second);
        result.append('Z');

        return result.toString();
    }
}