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ICU-7091 Use java timezone instead of java calendar.

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X-SVN-Rev: 27008
This commit is contained in:
Michael Ow 2009-12-03 05:38:18 +00:00
parent 8aac5e1176
commit 2ece8a6f3d
1 changed files with 26 additions and 42 deletions
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68
icu4j/main/classes/core/src/com/ibm/icu/impl/JavaTimeZone.java
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@ -9,6 +9,7 @@ package com.ibm.icu.impl;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TreeSet;
import com.ibm.icu.util.TimeZone;
@ -30,8 +31,7 @@ public class JavaTimeZone extends TimeZone {
private static final TreeSet<String> AVAILABLESET;
private java.util.TimeZone javatz;
private transient java.util.Calendar javacal;
static {
AVAILABLESET = new TreeSet<String>();
String[] availableIds = java.util.TimeZone.getAvailableIDs();
@ -46,7 +46,6 @@ public class JavaTimeZone extends TimeZone {
public JavaTimeZone() {
javatz = java.util.TimeZone.getDefault();
setID(javatz.getID());
javacal = new java.util.GregorianCalendar(javatz);
}
/**
@ -82,7 +81,6 @@ public class JavaTimeZone extends TimeZone {
javatz = java.util.TimeZone.getTimeZone(id);
}
setID(id);
javacal = new java.util.GregorianCalendar(javatz);
}
/* (non-Javadoc)
@ -96,45 +94,32 @@ public class JavaTimeZone extends TimeZone {
* @see com.ibm.icu.util.TimeZone#getOffset(long, boolean, int[])
*/
public void getOffset(long date, boolean local, int[] offsets) {
synchronized (javacal) {
if (local) {
int fields[] = new int[6];
Grego.timeToFields(date, fields);
int hour, min, sec, mil;
int tmp = fields[5];
mil = tmp % 1000;
tmp /= 1000;
sec = tmp % 60;
tmp /= 60;
min = tmp % 60;
hour = tmp / 60;
javacal.clear();
javacal.set(fields[0], fields[1], fields[2], hour, min, sec);
javacal.set(java.util.Calendar.MILLISECOND, mil);
int doy1, hour1, min1, sec1, mil1;
doy1 = javacal.get(java.util.Calendar.DAY_OF_YEAR);
hour1 = javacal.get(java.util.Calendar.HOUR_OF_DAY);
min1 = javacal.get(java.util.Calendar.MINUTE);
sec1 = javacal.get(java.util.Calendar.SECOND);
mil1 = javacal.get(java.util.Calendar.MILLISECOND);
if (fields[4] != doy1 || hour != hour1 || min != min1 || sec != sec1 || mil != mil1) {
// Calendar field(s) were changed due to the adjustment for non-existing time
// Note: This code does not support non-existing local time at year boundary properly.
// But, it should work fine for real timezones.
int dayDelta = Math.abs(doy1 - fields[4]) > 1 ? 1 : doy1 - fields[4];
int delta = ((((dayDelta * 24) + hour1 - hour) * 60 + min1 - min) * 60 + sec1 - sec) * 1000 + mil1 - mil;
// In this case, we use the offsets before the transition
javacal.setTimeInMillis(javacal.getTimeInMillis() - delta - 1);
}
} else {
javacal.setTimeInMillis(date);
int offset;
int dstOffset = 0;
if (local) {
int fields[] = new int[6];
Grego.timeToFields(date, fields);
int era = GregorianCalendar.AD;
int year = fields[0];
if (year <= 0) {
era = GregorianCalendar.BC;
year = 1 - year;
}
offsets[0] = javacal.get(java.util.Calendar.ZONE_OFFSET);
offsets[1] = javacal.get(java.util.Calendar.DST_OFFSET);
offset = javatz.getOffset(era, year, fields[1], fields[2], fields[3], fields[5]);
} else {
offset = javatz.getOffset(date);
}
if (javatz.inDaylightTime(new Date(date))) {
dstOffset = javatz.getDSTSavings();
}
offsets[0] = offset - dstOffset;
offsets[1] = dstOffset;
}
/* (non-Javadoc)
@ -204,6 +189,5 @@ public class JavaTimeZone extends TimeZone {
private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
s.defaultReadObject();
javacal = new java.util.GregorianCalendar(javatz);
}
}