com.sos.hibernate.classes.UtcTimeHelper.java Source code

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Here is the source code for com.sos.hibernate.classes.UtcTimeHelper.java

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/**
 * Copyright (C) 2014 BigLoupe http://bigloupe.github.io/SoS-JobScheduler/
 *
 * 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
 */
/********************************************************* begin of preamble
**
** Copyright (C) 2003-2012 Software- und Organisations-Service GmbH. 
** All rights reserved.
**
** This file may be used under the terms of either the 
**
**   GNU General Public License version 2.0 (GPL)
**
**   as published by the Free Software Foundation
**   http://www.gnu.org/licenses/gpl-2.0.txt and appearing in the file
**   LICENSE.GPL included in the packaging of this file. 
**
** or the
**  
**   Agreement for Purchase and Licensing
**
**   as offered by Software- und Organisations-Service GmbH
**   in the respective terms of supply that ship with this file.
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
** IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
** THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
** POSSIBILITY OF SUCH DAMAGE.
********************************************************** end of preamble*/
package com.sos.hibernate.classes;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

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

public class UtcTimeHelper {

    public static String localTimeZoneString() {
        return TimeZone.getDefault().getID();
    }

    public static String convertTimeZonesToString(String dateFormat, String fromTimeZone, String toTimeZone,
            DateTime fromDateTime) {
        DateTimeZone fromZone = DateTimeZone.forID(fromTimeZone);
        DateTimeZone toZone = DateTimeZone.forID(toTimeZone);

        DateTime dateTime = new DateTime(fromDateTime);

        dateTime = dateTime.withZoneRetainFields(fromZone);

        DateTime toDateTime = new DateTime(dateTime).withZone(toZone);

        DateTimeFormatter oFormatter = DateTimeFormat.forPattern("yyyy-MM-dd'T'H:mm:ss.SSSZ");
        DateTimeFormatter oFormatter2 = DateTimeFormat.forPattern(dateFormat);

        DateTime newDate = oFormatter.withOffsetParsed().parseDateTime(toDateTime.toString());

        return oFormatter2.withZone(toZone).print(newDate.getMillis());

    }

    public static Date convertTimeZonesToDate(String fromTimeZone, String toTimeZone, DateTime fromDateTime) {
        if (fromDateTime == null) {
            return null;
        }
        DateTimeZone fromZone = DateTimeZone.forID(fromTimeZone);
        DateTimeZone toZone = DateTimeZone.forID(toTimeZone);

        DateTime dateTime = new DateTime(fromDateTime);

        dateTime = dateTime.withZoneRetainFields(fromZone);

        DateTime toDateTime = new DateTime(dateTime).withZone(toZone);

        DateTimeFormatter oFormatter = DateTimeFormat.forPattern("yyyy-MM-dd'T'H:mm:ss.SSSZ");
        DateTimeFormatter oFormatter2 = DateTimeFormat.forPattern("yyyy-MM-dd H:mm:ss.ss");

        DateTime newDate = oFormatter.withOffsetParsed().parseDateTime(toDateTime.toString());

        try {
            return new SimpleDateFormat("yyyy-MM-dd H:mm:ss.ss")
                    .parse(oFormatter2.withZone(toZone).print(newDate.getMillis()));
        } catch (ParseException e) {
            e.printStackTrace();
            return null;
        }

    }
}