org.betaconceptframework.astroboa.util.DateUtils.java Source code

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Here is the source code for org.betaconceptframework.astroboa.util.DateUtils.java

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/*
 * Copyright (C) 2005-2012 BetaCONCEPT Limited
 *
 * This file is part of Astroboa.
 *
 * Astroboa is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Astroboa 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 Astroboa.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.betaconceptframework.astroboa.util;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.time.DateFormatUtils;

/**
 * @author Gregory Chomatas (gchomatas@betaconcept.com)
 * @author Savvas Triantafyllou (striantafyllou@betaconcept.com)
 * 
 */
public class DateUtils {

    public static Calendar clearTimeFromCalendar(Calendar calendar) {
        if (calendar != null) {
            calendar.set(Calendar.HOUR, 0);
            calendar.clear(Calendar.AM_PM); //ALWAYS clear AM_PM before HOUR_OF_DAY
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.clear(Calendar.DST_OFFSET);
            calendar.clear(Calendar.ZONE_OFFSET);
        }

        return calendar;
    }

    public static Calendar addLocaleToCalendar(Calendar date, String locale) {
        if (date != null) {
            if (locale != null) {
                Calendar localizedDate = Calendar.getInstance(new Locale(locale));
                localizedDate.setTime(date.getTime());
                return localizedDate;
            } else
                return date;
        }

        return null;
    }

    private final static String Default_Pattern = "dd/MM/yyyy HH:mm:ss.SSS";

    public static String format(Calendar calendar, String pattern) {
        if (calendar == null)
            return null;

        return formatDate(calendar.getTime(), pattern);
    }

    public static String formatDate(Date date, String pattern) {
        if (date == null)
            return null;
        if (StringUtils.isBlank(pattern))
            pattern = Default_Pattern; //Default Pattern

        return DateFormatUtils.format(date, pattern);
    }

    public static String formatDate(Date date) {
        return formatDate(date, null);

    }

    public static String format(Calendar calendar) {
        return format(calendar, null);
    }

    public static Calendar fromString(String date) {
        return fromString(date, Default_Pattern);
    }

    public static Calendar fromString(String date, String pattern) {
        SimpleDateFormat df = new SimpleDateFormat(pattern);

        try {
            return toCalendar(df.parse(date));
        } catch (Exception e) {
            return null;
        }
    }

    public static Calendar toCalendar(Date date) {
        if (date == null)
            return null;

        Calendar cal = Calendar.getInstance();
        cal.setTime(date);

        return cal;
    }
}