/*
* PatientView
*
* Copyright (c) Worth Solutions Limited 2004-2013
*
* This file is part of PatientView.
*
* PatientView is free software: you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
* PatientView 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 General Public License for more details.
* You should have received a copy of the GNU General Public License along with PatientView in a file
* titled COPYING. If not, see <http://www.gnu.org/licenses/>.
*
* @package PatientView
* @link http://www.patientview.org
* @author PatientView <info@patientview.org>
* @copyright Copyright (c) 2004-2013, Worth Solutions Limited
* @license http://www.gnu.org/licenses/gpl-3.0.html The GNU General Public License V3.0
*/
package org.patientview.patientview.utils;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.concurrent.atomic.AtomicReference;
public final class TimestampUtils {
public static final SimpleDateFormat DAY_FORMAT_SLASH = new SimpleDateFormat("dd/MM/yyyy");
public static final SimpleDateFormat DAY_FORMAT_SLASH_BACKWARDS = new SimpleDateFormat("yyyy/MM/dd");
public static final String DAY_FORMAT_DASH = "dd-MM-yyyy";
public static final String DAY_FORMAT_DASH_BACKWARDS = "yyyy-MM-dd";
public static final String DAY_FORMAT_DASH_BACKWARDS_WITH_HOUR_AND_MINUTE = "yyyy-MM-dd'T'HH:mm";
public static final String DAY_FORMAT_DASH_BACKWARDS_WITH_HOUR_MINUTE_AND_SECOND = "yyyy-MM-dd HH:mm:ss";
public static final String DAY_FORMAT_DASH_BACKWARDS_WITH_T_HOUR_MINUTE_AND_SECOND = "yyyy-MM-dd'T'HH:mm:ss";
private static final int YEAR_FIRST_DASH_POS = 4;
private static final int DATE_WITH_SECONDS_LENGTH = 19;
private static final int DATE_WITH_MINUTES_LENGTH = 16;
private static final int DATE_ONLY_LENGTH = 10;
private static final int ISO_DATE_T_POS = 10;
private static final int NORMAL_DATE_SPACE_POS = 10;
private static final int LAST_HOUR = 23;
private static final int LAST_MINUTE = 59;
private static final int LAST_SECOND = 59;
private static final int LAST_MILLISECOND = 999;
private static final Logger LOGGER = LoggerFactory.getLogger(TimestampUtils.class);
/**
* Given a date string, this method attempts to figure out which format it has and then returns a calendar object
* <p/>
* Ideally this method should get format as a parameter in order to avoid possible ambiguous dates like 2/1/2012
*
* @return date object if date format is recognised
*/
private TimestampUtils() {
}
public static Calendar createTimestamp(String dateTimeString) {
Calendar cal = new GregorianCalendar();
DateTimeFormatter formatter = null;
try {
if (dateTimeString.contains("-")) {
if (dateTimeString.indexOf("-") == 2) {
formatter = DateTimeFormat.forPattern(DAY_FORMAT_DASH);
} else if (dateTimeString.indexOf("-") == YEAR_FIRST_DASH_POS
&& dateTimeString.length() == DATE_WITH_SECONDS_LENGTH
&& dateTimeString.indexOf("T") == ISO_DATE_T_POS) {
formatter = DateTimeFormat.forPattern(DAY_FORMAT_DASH_BACKWARDS_WITH_T_HOUR_MINUTE_AND_SECOND);
} else if (dateTimeString.indexOf("-") == YEAR_FIRST_DASH_POS
&& dateTimeString.length() == DATE_WITH_SECONDS_LENGTH
&& dateTimeString.indexOf(" ") == NORMAL_DATE_SPACE_POS) {
formatter = DateTimeFormat.forPattern(DAY_FORMAT_DASH_BACKWARDS_WITH_HOUR_MINUTE_AND_SECOND);
} else if (dateTimeString.indexOf("-") == YEAR_FIRST_DASH_POS
&& dateTimeString.length() == DATE_WITH_MINUTES_LENGTH) {
formatter = DateTimeFormat.forPattern(DAY_FORMAT_DASH_BACKWARDS_WITH_HOUR_AND_MINUTE);
} else if (dateTimeString.indexOf("-") == YEAR_FIRST_DASH_POS
&& dateTimeString.length() == DATE_ONLY_LENGTH) {
formatter = DateTimeFormat.forPattern(DAY_FORMAT_DASH_BACKWARDS);
}
DateTime dateTime;
if (formatter == null) {
dateTime = new DateTime(dateTimeString);
} else {
dateTime = formatter.parseDateTime(dateTimeString);
}
cal.setTime(dateTime.toDate());
} else {
AtomicReference<Date> date = new AtomicReference<Date>();
if (dateTimeString.indexOf("/") == 2) {
date.set(DAY_FORMAT_SLASH.parse(dateTimeString));
cal.setTime(date.get());
} else {
date.set(DAY_FORMAT_SLASH_BACKWARDS.parse(dateTimeString));
cal.setTime(date.get());
}
}
} catch (Exception e) {
LOGGER.error("Can not parse date {}", dateTimeString, e.getMessage());
cal = null;
}
return cal;
}
public static Calendar createTimestampStartDay(String dateTimeString) {
Calendar cal = createTimestamp(dateTimeString);
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
return cal;
}
public static Calendar createTimestampEndDay(String dateTimeString) {
Calendar cal = createTimestamp(dateTimeString);
cal.set(Calendar.HOUR_OF_DAY, LAST_HOUR);
cal.set(Calendar.MINUTE, LAST_MINUTE);
cal.set(Calendar.SECOND, LAST_SECOND);
cal.set(Calendar.MILLISECOND, LAST_MILLISECOND);
return cal;
}
}