com.thoughtworks.xstream.core.util.ISO8601JodaTimeConverter.java Source code

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Here is the source code for com.thoughtworks.xstream.core.util.ISO8601JodaTimeConverter.java

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/*
 * Copyright (C) 2005 Joe Walnes.
 * Copyright (C) 2006, 2007, 2011, 2013, 2014, 2015, 2016, 2017 XStream Committers.
 * All rights reserved.
 *
 * The software in this package is published under the terms of the BSD
 * style license a copy of which has been included with this distribution in
 * the LICENSE.txt file.
 *
 * Created on 05. May 2017 by Joerg Schaible, copied from ISO8601GregorianCalendarConverter
 */
package com.thoughtworks.xstream.core.util;

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

import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;

import com.thoughtworks.xstream.converters.ConversionException;
import com.thoughtworks.xstream.converters.basic.AbstractSingleValueConverter;

/**
 * A converter for {@link GregorianCalendar} conforming to the ISO8601 standard based on Joda-Time.
 * <p>
 * The converter will always serialize the calendar value in UTC and deserialize it to a value in the current default
 * time zone.
 * </p>
 *
 * @author Mauro Talevi
 * @author J&ouml;rg Schaible
 * @see <a href="http://www.iso.org/iso/home/store/catalogue_ics/catalogue_detail_ics.htm?csnumber=40874">ISO 8601</a>
 * @since 1.4.10
 */
public class ISO8601JodaTimeConverter extends AbstractSingleValueConverter {
    private static final DateTimeFormatter[] formattersUTC = { //
            ISODateTimeFormat.dateTime(), //
            ISODateTimeFormat.dateTimeNoMillis(), //
            ISODateTimeFormat.basicDateTime(), //
            ISODateTimeFormat.basicDateTimeNoMillis(), //
            ISODateTimeFormat.basicOrdinalDateTime(), //
            ISODateTimeFormat.basicOrdinalDateTimeNoMillis(), //
            ISODateTimeFormat.basicTime(), //
            ISODateTimeFormat.basicTimeNoMillis(), //
            ISODateTimeFormat.basicTTime(), //
            ISODateTimeFormat.basicTTimeNoMillis(), //
            ISODateTimeFormat.basicWeekDateTime(), //
            ISODateTimeFormat.basicWeekDateTimeNoMillis(), //
            ISODateTimeFormat.ordinalDateTime(), //
            ISODateTimeFormat.ordinalDateTimeNoMillis(), //
            ISODateTimeFormat.time(), //
            ISODateTimeFormat.timeNoMillis(), //
            ISODateTimeFormat.tTime(), //
            ISODateTimeFormat.tTimeNoMillis(), //
            ISODateTimeFormat.weekDateTime(), //
            ISODateTimeFormat.weekDateTimeNoMillis() //
    };
    private static final DateTimeFormatter[] formattersNoUTC = { //
            ISODateTimeFormat.basicDate(), //
            ISODateTimeFormat.basicOrdinalDate(), //
            ISODateTimeFormat.basicWeekDate(), //
            ISODateTimeFormat.date(), //
            ISODateTimeFormat.dateHour(), //
            ISODateTimeFormat.dateHourMinute(), //
            ISODateTimeFormat.dateHourMinuteSecond(), //
            ISODateTimeFormat.dateHourMinuteSecondFraction(), //
            ISODateTimeFormat.dateHourMinuteSecondMillis(), //
            ISODateTimeFormat.hour(), //
            ISODateTimeFormat.hourMinute(), //
            ISODateTimeFormat.hourMinuteSecond(), //
            ISODateTimeFormat.hourMinuteSecondFraction(), //
            ISODateTimeFormat.hourMinuteSecondMillis(), //
            ISODateTimeFormat.ordinalDate(), //
            ISODateTimeFormat.weekDate(), //
            ISODateTimeFormat.year(), //
            ISODateTimeFormat.yearMonth(), //
            ISODateTimeFormat.yearMonthDay(), //
            ISODateTimeFormat.weekyear(), //
            ISODateTimeFormat.weekyearWeek(), //
            ISODateTimeFormat.weekyearWeekDay() //
    };

    @Override
    public boolean canConvert(final Class<?> type) {
        return false;
    }

    @Override
    public Object fromString(final String str) {
        for (final DateTimeFormatter formatter : formattersUTC) {
            try {
                final DateTime dt = formatter.parseDateTime(str);
                final Calendar calendar = dt.toGregorianCalendar();
                calendar.setTimeZone(TimeZone.getDefault());
                return calendar;
            } catch (final IllegalArgumentException e) {
                // try with next formatter
            }
        }
        final DateTimeZone dateTimeZone = DateTimeZone.forTimeZone(TimeZone.getDefault());
        for (final DateTimeFormatter element : formattersNoUTC) {
            try {
                final DateTimeFormatter formatter = element.withZone(dateTimeZone);
                final DateTime dt = formatter.parseDateTime(str);
                final Calendar calendar = dt.toGregorianCalendar();
                calendar.setTimeZone(TimeZone.getDefault());
                return calendar;
            } catch (final IllegalArgumentException e) {
                // try with next formatter
            }
        }
        final ConversionException exception = new ConversionException("Cannot parse date");
        exception.add("date", str);
        throw exception;
    }

    @Override
    public String toString(final Object obj) {
        final DateTime dt = new DateTime(obj);
        return dt.toString(formattersUTC[0]);
    }
}