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提交 487e9e87 authored 作者: Thomas Mueller's avatar Thomas Mueller
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h2/src/main/org/h2/util/DateTimeUtils.java 0 → 100644
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/*
* Copyright 2004-2006 H2 Group. Licensed under the H2 License, Version 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.util;
import java.sql.Date;
import java.sql.SQLException;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.TimeZone;
import org.h2.message.Message;
import org.h2.value.Value;
import org.h2.value.ValueDate;
import org.h2.value.ValueTime;
import org.h2.value.ValueTimestamp;
public class DateTimeUtils {
public static Timestamp convertTimestampToCalendar(Timestamp x, Calendar calendar) throws SQLException {
if(x != null) {
Timestamp y = new Timestamp(getLocalTime(x, calendar));
// fix the nano seconds
y.setNanos(x.getNanos());
x = y;
}
return x;
}
public static Time cloneAndNormalizeTime(Time value) {
Calendar cal = Calendar.getInstance();
cal.setTime(value);
// TODO gcj: required so that the millis are calculated?
cal.get(Calendar.HOUR_OF_DAY);
cal.set(1970, 0, 1);
return new Time(cal.getTime().getTime());
}
public static Date cloneAndNormalizeDate(Date value) {
Calendar cal = Calendar.getInstance();
cal.setTime(value);
// TODO gcj: required so that the millis are calculated?
cal.get(Calendar.YEAR);
cal.set(Calendar.MILLISECOND, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.HOUR_OF_DAY, 0);
return new Date(cal.getTime().getTime());
}
public static Value convertDateToUniversal(Date x, Calendar source) throws SQLException {
return ValueDate.get(new Date(getUniversalTime(source, x)));
}
public static Value convertTimeToUniversal(Time x, Calendar source) throws SQLException {
return ValueTime.get(new Time(getUniversalTime(source, x)));
}
public static Value convertTimestampToUniversal(Timestamp x, Calendar source) throws SQLException {
Timestamp y = new Timestamp(getUniversalTime(source, x));
// fix the nano seconds
y.setNanos(x.getNanos());
return ValueTimestamp.getNoCopy(y);
}
private static long getUniversalTime(Calendar source, java.util.Date x) throws SQLException {
if(source == null) {
throw Message.getInvalidValueException("calendar", null);
}
source = (Calendar)source.clone();
Calendar universal=Calendar.getInstance();
source.setTime(x);
convertTime(source, universal);
return universal.getTime().getTime();
}
private static long getLocalTime(java.util.Date x, Calendar target) throws SQLException {
if(target == null) {
throw Message.getInvalidValueException("calendar", null);
}
target = (Calendar)target.clone();
Calendar local=Calendar.getInstance();
local.setTime(x);
convertTime(local, target);
return target.getTime().getTime();
}
private static void convertTime(Calendar from, Calendar to) {
to.set(Calendar.YEAR, from.get(Calendar.YEAR));
to.set(Calendar.MONTH, from.get(Calendar.MONTH));
to.set(Calendar.DAY_OF_MONTH, from.get(Calendar.DAY_OF_MONTH));
to.set(Calendar.HOUR_OF_DAY, from.get(Calendar.HOUR_OF_DAY));
to.set(Calendar.MINUTE, from.get(Calendar.MINUTE));
to.set(Calendar.SECOND, from.get(Calendar.SECOND));
to.set(Calendar.MILLISECOND, from.get(Calendar.MILLISECOND));
}
public static Date convertDateToCalendar(Date x, Calendar calendar) throws SQLException {
return x == null ? x : new Date(getLocalTime(x, calendar));
}
public static Time convertTimeToCalendar(Time x, Calendar calendar) throws SQLException {
return x == null ? x : new Time(getLocalTime(x, calendar));
}
public static java.util.Date parseDateTime(String s, int type, int errorCode) throws SQLException {
if (s == null) {
return null;
}
try {
int timeStart = 0;
TimeZone tz = null;
if(type == Value.TIME) {
timeStart = 0;
} else {
timeStart = s.indexOf(' ') + 1;
if(timeStart <= 0) {
// ISO 8601 compatibility
timeStart = s.indexOf('T') + 1;
}
}
int year = 1970, month = 1, day = 1;
if (type != Value.TIME) {
// support +year
if(s.startsWith("+")) {
s = s.substring(1);
}
// start at position 1 to support -year
int s1 = s.indexOf('-', 1);
int s2 = s.indexOf('-', s1 + 1);
if(s1 <= 0 || s2 <= s1) {
throw Message.getSQLException(errorCode, s);
}
year = Integer.parseInt(s.substring(0, s1));
month = Integer.parseInt(s.substring(s1 + 1, s2));
int end = timeStart == 0 ? s.length() : timeStart - 1;
day = Integer.parseInt(s.substring(s2 + 1, end));
}
int hour = 0, minute = 0, second = 0, nano = 0;
if (type != Value.DATE) {
int s1 = s.indexOf(':', timeStart);
int s2 = s.indexOf(':', s1 + 1);
int s3 = s.indexOf('.', s2 + 1);
if(s1 <= 0 || s2 <= s1) {
throw Message.getSQLException(errorCode, s);
}
if(s.endsWith("Z")) {
s = s.substring(0, s.length()-1);
} else {
int tzstart = s.indexOf('+', s2 + 1);
if(tzstart < 0) {
tzstart = s.indexOf('-', s2 + 1);
}
if(tzstart >= 0) {
String tzName = "GMT" + s.substring(tzstart);
tz = TimeZone.getTimeZone(tzName);
if(!tz.getID().equals(tzName)) {
throw Message.getSQLException(errorCode, s + " " + tz.getID() + "/" + tzName);
}
s = s.substring(0, tzstart);
}
}
hour = Integer.parseInt(s.substring(timeStart, s1));
minute = Integer.parseInt(s.substring(s1 + 1, s2));
if (s3 < 0) {
second = Integer.parseInt(s.substring(s2 + 1));
} else {
second = Integer.parseInt(s.substring(s2 + 1, s3));
String n = (s + "000000000").substring(s3 + 1, s3 + 10);
nano = Integer.parseInt(n);
}
}
Calendar c;
if(tz == null) {
c = Calendar.getInstance();
} else {
c = Calendar.getInstance(tz);
}
c.setLenient(false);
long time;
if(year <= 0) {
c.set(Calendar.ERA, GregorianCalendar.BC);
c.set(Calendar.YEAR, 1 - year);
} else {
c.set(Calendar.YEAR, year);
}
c.set(Calendar.MONTH, month - 1); // january is 0
c.set(Calendar.DAY_OF_MONTH, day);
c.set(Calendar.HOUR_OF_DAY, hour);
c.set(Calendar.MINUTE, minute);
c.set(Calendar.SECOND, second);
if(type != Value.TIMESTAMP) {
c.set(Calendar.MILLISECOND, nano / 1000000);
}
time = c.getTime().getTime();
switch(type) {
case Value.DATE:
return new java.sql.Date(time);
case Value.TIME:
return new java.sql.Time(time);
case Value.TIMESTAMP: {
Timestamp ts = new Timestamp(time);
ts.setNanos(nano);
return ts;
}
default:
throw Message.getInternalError("type:"+type);
}
} catch(IllegalArgumentException e) {
throw Message.getSQLException(errorCode, s);
}
}
}
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