influent.server.utilities.DateTimeParser.java Source code

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Here is the source code for influent.server.utilities.DateTimeParser.java

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/*
 * Copyright (C) 2013-2015 Uncharted Software Inc.
 *
 * Property of Uncharted(TM), formerly Oculus Info Inc.
 * http://uncharted.software/
 *
 * Released under the MIT License.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package influent.server.utilities;

import org.joda.time.DateTime;
import org.joda.time.DateTimeConstants;
import org.joda.time.DateTimeUtils;
import org.joda.time.DateTimeZone;
import org.joda.time.Period;
import org.joda.time.PeriodType;
import org.joda.time.chrono.ISOChronology;
import org.joda.time.field.FieldUtils;
import org.joda.time.format.ISODateTimeFormat;

/**
 * DateTime handler for influent dates.
 * 
 * @author djonker
 */
public class DateTimeParser {

    /**
     * @see http://joda-time.sourceforge.net/apidocs/org/joda/time/DateTime.html#parse(java.lang.String)
     */
    public static DateTime parse(String str) {
        if (str == null || str.isEmpty())
            return null;

        // if we can, just pick out the date because we need to ignore any time zone information.
        if (str.length() >= 10) {
            try {
                int yyyy = Integer.parseInt(str.substring(0, 4));
                int mm = Integer.parseInt(str.substring(5, 7));
                int dd = Integer.parseInt(str.substring(8, 10));

                // extra sanity check
                switch (str.charAt(4)) {
                case '-':
                case '/':
                    return new DateTime(yyyy, mm, dd, 0, 0, 0, DateTimeZone.UTC);
                }

            } catch (Exception e) {
            }
        }

        final DateTime d = ISODateTimeFormat.dateTimeParser().withOffsetParsed().parseDateTime(str);

        return new DateTime(d.getYear(), d.getMonthOfYear(), d.getDayOfMonth(), 0, 0, 0, DateTimeZone.UTC);
    }

    public static DateTime fromFL(Object value) {
        if (value instanceof Long) {
            return new DateTime(((Long) value).longValue(), DateTimeZone.UTC);
        }

        return null;
    }

    /**
     * @see http://joda-time.sourceforge.net/apidocs/org/joda/time/Period.html#normalizedStandard()
     */
    public static Period normalize(Period period) {
        long millis = period.getMillis();
        millis += period.getSeconds() * DateTimeConstants.MILLIS_PER_SECOND;
        millis += period.getMinutes() * DateTimeConstants.MILLIS_PER_MINUTE;
        millis += period.getHours() * DateTimeConstants.MILLIS_PER_HOUR;
        millis += period.getDays() * DateTimeConstants.MILLIS_PER_DAY;
        millis += period.getWeeks() * DateTimeConstants.MILLIS_PER_WEEK;

        Period result = new Period(millis, DateTimeUtils.getPeriodType(PeriodType.standard()),
                ISOChronology.getInstanceUTC());
        int years = period.getYears();
        int months = period.getMonths();

        if (years != 0 || months != 0) {
            years = FieldUtils.safeAdd(years, months / 12);
            months = months % 12;
            if (years != 0) {
                result = result.withYears(years);
            }
            if (months != 0) {
                result = result.withMonths(months);
            }
        }

        return result;
    }
}