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/*
* $Id$
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2018 OpenLink Software
*
* This project 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; only version 2 of the License, dated June 1991.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
package virtuoso.jdbc2;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;
import java.sql.*;
class DateObject
{
java.util.Calendar cal_dat = new java.util.GregorianCalendar ();
int day;
int hour;
int minute;
int second;
int fraction;
int tz;
int type;
protected DateObject(int _day, int _hour, int _minute, int _second,
int _fraction, int _tz, int _type)
{
this.day = _day;
this.hour = _hour;
this.minute = _minute;
this.second = _second;
this.fraction = _fraction;
this.tz = _tz;
this.type = _type;
}
protected Object getValue (boolean sparql_executed)
{
if (sparql_executed)
{
java.util.Calendar cal_gmt = new java.util.GregorianCalendar(TimeZone.getTimeZone("GMT"));
num2date(day, cal_gmt);
cal_gmt.set (Calendar.HOUR_OF_DAY, hour);
cal_gmt.set (Calendar.MINUTE, minute);
cal_gmt.set (Calendar.SECOND, second);
cal_gmt.set (Calendar.MILLISECOND, fraction/1000);
// Convert to Local GMT
cal_dat.setTime(cal_gmt.getTime());
}
else
{
if(tz != 0)
{
int sec = time_to_sec (0, hour, minute, second);
sec += 60 * tz;
if (sec < 0)
{
day = day - (1 + ((-sec) / SPERDAY));
sec = sec % SPERDAY;
if (sec == 0)
day++;
sec = SPERDAY + sec;
}
else
{
day = day + sec / SPERDAY;
sec = sec % SPERDAY;
}
int dummy_day = sec / SPERDAY;
hour = (sec - (dummy_day * SPERDAY)) / (60 * 60);
minute = (sec - (dummy_day * SPERDAY) - (hour * 60 * 60)) / 60;
second = sec % 60;
}
num2date(day, cal_dat);
cal_dat.set (Calendar.HOUR_OF_DAY, hour);
cal_dat.set (Calendar.MINUTE, minute);
cal_dat.set (Calendar.SECOND, second);
cal_dat.set (Calendar.MILLISECOND, fraction/1000);
}
switch(type)
{
case VirtuosoTypes.DT_TYPE_DATE:
return new VirtuosoDate(cal_dat.getTime().getTime(), tz, sparql_executed);
case VirtuosoTypes.DT_TYPE_TIME:
return new VirtuosoTime(cal_dat.getTime().getTime(), tz, sparql_executed);
default:
{
Timestamp ts = new VirtuosoTimestamp(cal_dat.getTime().getTime(), tz, sparql_executed);
int nanos = fraction * 1000;
if (nanos > 999999999)
ts.setNanos(fraction);
else
ts.setNanos(nanos);
return ts;
}
}
}
static final int SPERDAY = (24 * 60 * 60);
static int time_to_sec (int day, int hour, int min, int sec)
{
return (day * SPERDAY + hour * 60 * 60 + min * 60 + sec);
}
void
num2date (int julian_days, Calendar date)
{
long y_civ, m_civ, d_civ;
long midhignt_jdn;
long mj, g, dg, c, dc, b, db, a, da, y, m, d;
long /*c, d, m,*/ e;
midhignt_jdn = julian_days + 1721423;
if (2299161 <= midhignt_jdn)
{
mj = midhignt_jdn + 32044;
g = mj / 146097;
dg = mj % 146097;
c = (dg / 36524 + 1) * 3 / 4;
dc = dg - c * 36524;
b = dc / 1461;
db = dc % 1461;
a = (db / 365 + 1) * 3 / 4;
da = db - a * 365;
y = g * 400 + c * 100 + b * 4 + a;
m = (da * 5 + 308) / 153 - 2;
d = da - (m + 4) * 153 / 5 + 122;
y_civ = y - 4800 + (m+2)/12;
m_civ = (m+2)%12 + 1;
d_civ = d+1;
}
else if (1722884 == midhignt_jdn)
{
d_civ = m_civ = 1; y_civ = 5;
}
else
{
c = midhignt_jdn + 32082;
d = (4*c+3)/1461;
e = c - (1461*d)/4;
m = (5*e+2)/153;
d_civ = e - (153*m+2)/5+1;
m_civ = m + 3 - 12 * (m/10);
y_civ = d - 4800 + m/10;
if (y_civ < 0)
y_civ--;
}
if (y_civ < 0) {
date.set(Calendar.ERA, GregorianCalendar.BC);
date.set (Calendar.YEAR, (int)-y_civ);
}
else
date.set (Calendar.YEAR, (int)y_civ);
date.set(Calendar.MONTH, (int)m_civ - 1);
date.set(Calendar.DAY_OF_MONTH, (int)d_civ);
}
static final int GREG_JDAYS = 577737;
static final int GREG_LAST_DAY = 14;
static final int GREG_FIRST_DAY = 5;
static final int GREG_MONTH = 10;
static final int GREG_YEAR = 1582;
static final int DAY_LAST = 365;
static final int DAY_MIN = 1;
static final int MONTH_MIN = 1;
static final int MONTH_MAX = 12;
static final int MONTH_LAST = 31;
static final int days_in_month[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
static void yearday2date(int yday, boolean is_leap_year, Calendar date)
{
int i;
boolean decrement_date;
int month, day;
if (yday > DAY_LAST + (is_leap_year ? 1 : 0) || yday < DAY_MIN)
return;
decrement_date = (is_leap_year && (yday > 59));
if (decrement_date)
yday--;
for (i = MONTH_MIN; i < MONTH_MAX; i++)
{
yday -= days_in_month[i - 1];
if (yday <= 0)
{
yday += days_in_month[i - 1];
break;
}
}
month = i;
day = yday;
if (decrement_date && month == 2 && day == 28)
day = day + 1;
//System.err.println (" day=" + day + " month=" + month);
date.set(Calendar.MONTH, month - 1);
date.set(Calendar.DAY_OF_MONTH, day);
return;
}
}
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