2 * Copyright (C) 2001-2006 The Mir-coders group
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4 * This file is part of Mir.
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6 * Mir is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or
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9 * (at your option) any later version.
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11 * Mir is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with Mir; if not, write to the Free Software
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18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 * In addition, as a special exception, The Mir-coders gives permission to link
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21 * the code of this program with any library licensed under the Apache Software License,
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22 * and distribute linked combinations including the two. You must obey the
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23 * GNU General Public License in all respects for all of the code used other than
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24 * the above mentioned libraries. If you modify this file, you may extend this
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25 * exception to your version of the file, but you are not obligated to do so.
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26 * If you do not wish to do so, delete this exception statement from your version.
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28 package mir.storage;
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30 import mir.config.MirPropertiesConfiguration;
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31 import mir.misc.StringUtil;
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33 import java.text.DateFormat;
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34 import java.text.SimpleDateFormat;
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35 import java.util.Date;
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36 import java.util.TimeZone;
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37 import java.util.GregorianCalendar;
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38 import java.util.Calendar;
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40 public class DatabaseHelper {
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41 public static final TimeZone INTERNAL_TIMEZONE = TimeZone.getTimeZone(
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42 MirPropertiesConfiguration.instance().getString("Mir.DefaultTimezone"));
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43 public static final DateFormat INTERNAL_DATE_FORMAT =
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44 new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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46 private DatabaseHelper() {
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50 INTERNAL_DATE_FORMAT.setTimeZone(INTERNAL_TIMEZONE);
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53 public static String convertDateToInternalRepresenation(Date aDate) {
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54 Calendar calendar = new GregorianCalendar();
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55 calendar.setTime(aDate);
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56 calendar.setTimeZone(INTERNAL_TIMEZONE);
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57 int offset = calendar.get(Calendar.ZONE_OFFSET);
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58 boolean positive = true;
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63 int offsethours = offset / (60*60*1000);
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65 return INTERNAL_DATE_FORMAT.format(aDate) + (positive?"+":"-") +
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66 StringUtil.zeroPaddingNumber((long) offsethours, 2, 2);
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69 public static String getInternalTimeZoneOffset(Date aDate) {
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70 Calendar calendar = new GregorianCalendar();
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71 calendar.setTime(aDate);
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72 calendar.setTimeZone(INTERNAL_TIMEZONE);
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74 int offset = calendar.get(Calendar.DST_OFFSET);
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75 boolean positive = true;
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80 int offsethours = offset / 60*60*1000;
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81 int offsetminutes = ( offset / 60*1000 ) % 60;
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83 return (positive?"+":"-") +
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84 StringUtil.zeroPaddingNumber((long) offsethours, 2, 2) + ":" +
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85 StringUtil.zeroPaddingNumber((long) offsetminutes, 2, 2);
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