fm.last.commons.lang.time.XmlGregorianCalendarUtils.java Source code

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Here is the source code for fm.last.commons.lang.time.XmlGregorianCalendarUtils.java

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/*
 * Copyright 2012 Last.fm
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package fm.last.commons.lang.time;

import javax.xml.datatype.XMLGregorianCalendar;

import org.joda.time.DateTime;
import org.joda.time.LocalDateTime;
import org.joda.time.LocalTime;

/**
 * Utility functions for working with DateTime objects.
 */
public final class XmlGregorianCalendarUtils {

    /**
     * Private constructor to prevent instantiation.
     */
    private XmlGregorianCalendarUtils() {
    }

    /**
     * Converts from an XMLGregorianCalendar to a LocalDateTime i.e. represents a date and time without timezone
     * inform.ation
     * 
     * @param calendar XMLGregorianCalendar object.
     * @return The calendar converted to a LocalDateTime.
     */
    public static LocalDateTime convertToLocalDateTime(XMLGregorianCalendar calendar) {
        if (calendar == null) {
            return null;
        }
        int year = calendar.getYear() > 0 ? calendar.getYear() : 0;
        int hour = calendar.getHour() > 0 ? calendar.getHour() : 0;
        int minute = calendar.getMinute() > 0 ? calendar.getMinute() : 0;
        int second = calendar.getSecond() > 0 ? calendar.getSecond() : 0;
        int millisecond = calendar.getMillisecond() > 0 ? calendar.getMillisecond() : 0;

        return new LocalDateTime(year, calendar.getMonth(), calendar.getDay(), hour, minute, second, millisecond);
    }

    public static DateTime convertToDateTime(XMLGregorianCalendar calendar) {
        if (calendar == null) {
            return null;
        }
        // for now we just delegate to version which doesn't deal with time zones, this method should be amended to take TZ
        // into consideration if needed
        return convertToLocalDateTime(calendar).toDateTime();
    }

    /**
     * Converts from an XMLGregorianCalendar to a LocalTime i.e. represents a time without timezone or date information.
     * 
     * @param calendar XMLGregorianCalendar object.
     * @return The calendar converted to a LocalTime.
     */
    public static LocalTime convertToLocalTime(XMLGregorianCalendar calendar) {
        if (calendar == null) {
            return null;
        }
        int hour = calendar.getHour() > 0 ? calendar.getHour() : 0;
        int minute = calendar.getMinute() > 0 ? calendar.getMinute() : 0;
        int second = calendar.getSecond() > 0 ? calendar.getSecond() : 0;
        int millisecond = calendar.getMillisecond() > 0 ? calendar.getMillisecond() : 0;

        return new LocalTime(hour, minute, second, millisecond);
    }

}