| /* |
| ******************************************************************************* |
| * Copyright (C) 2008-2014, International Business Machines Corporation and * |
| * others. All Rights Reserved. * |
| ******************************************************************************* |
| */ |
| package com.ibm.icu.impl; |
| |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.Date; |
| import java.util.TreeSet; |
| |
| import com.ibm.icu.util.TimeZone; |
| |
| /** |
| * JavaTimeZone inherits com.ibm.icu.util.TimeZone and wraps java.util.TimeZone. |
| * We used to have JDKTimeZone which wrapped Java TimeZone and used it as primary |
| * TimeZone implementation until ICU4J 3.4.1. This class works exactly like |
| * JDKTimeZone and allows ICU users who use ICU4J and JDK date/time/calendar |
| * services in mix to maintain only JDK timezone rules. |
| * |
| * This TimeZone subclass is returned by the TimeZone factory method getTimeZone(String) |
| * when the default timezone type in TimeZone class is TimeZone.TIMEZONE_JDK. |
| */ |
| public class JavaTimeZone extends TimeZone { |
| |
| private static final long serialVersionUID = 6977448185543929364L; |
| |
| private static final TreeSet<String> AVAILABLESET; |
| |
| private java.util.TimeZone javatz; |
| private transient java.util.Calendar javacal; |
| private static Method mObservesDaylightTime; |
| |
| static { |
| AVAILABLESET = new TreeSet<String>(); |
| String[] availableIds = java.util.TimeZone.getAvailableIDs(); |
| for (int i = 0; i < availableIds.length; i++) { |
| AVAILABLESET.add(availableIds[i]); |
| } |
| |
| try { |
| mObservesDaylightTime = java.util.TimeZone.class.getMethod("observesDaylightTime", (Class[]) null); |
| } catch (NoSuchMethodException e) { |
| // Java 6 or older |
| } catch (SecurityException e) { |
| // not visible |
| } |
| } |
| |
| /** |
| * Constructs a JavaTimeZone with the default Java TimeZone |
| */ |
| public JavaTimeZone() { |
| this(java.util.TimeZone.getDefault(), null); |
| } |
| |
| /** |
| * Constructs a JavaTimeZone with the specified Java TimeZone and ID. |
| * @param jtz the Java TimeZone |
| * @param id the ID of the zone. if null, the zone ID is initialized |
| * by the given Java TimeZone's ID. |
| */ |
| public JavaTimeZone(java.util.TimeZone jtz, String id) { |
| if (id == null) { |
| id = jtz.getID(); |
| } |
| javatz = jtz; |
| setID(id); |
| javacal = new java.util.GregorianCalendar(javatz); |
| } |
| |
| /** |
| * Creates an instance of JavaTimeZone with the given timezone ID. |
| * @param id A timezone ID, either a system ID or a custom ID. |
| * @return An instance of JavaTimeZone for the given ID, or null |
| * when the ID cannot be understood. |
| */ |
| public static JavaTimeZone createTimeZone(String id) { |
| java.util.TimeZone jtz = null; |
| |
| if (AVAILABLESET.contains(id)) { |
| jtz = java.util.TimeZone.getTimeZone(id); |
| } |
| |
| if (jtz == null) { |
| // Use ICU's canonical ID mapping |
| boolean[] isSystemID = new boolean[1]; |
| String canonicalID = TimeZone.getCanonicalID(id, isSystemID); |
| if (isSystemID[0] && AVAILABLESET.contains(canonicalID)) { |
| jtz = java.util.TimeZone.getTimeZone(canonicalID); |
| } |
| } |
| |
| if (jtz == null) { |
| return null; |
| } |
| |
| return new JavaTimeZone(jtz, id); |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#getOffset(int, int, int, int, int, int) |
| */ |
| public int getOffset(int era, int year, int month, int day, int dayOfWeek, int milliseconds) { |
| return javatz.getOffset(era, year, month, day, dayOfWeek, milliseconds); |
| } |
| |
| /* (non-Javadoc) |
| * @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); |
| } |
| offsets[0] = javacal.get(java.util.Calendar.ZONE_OFFSET); |
| offsets[1] = javacal.get(java.util.Calendar.DST_OFFSET); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#getRawOffset() |
| */ |
| public int getRawOffset() { |
| return javatz.getRawOffset(); |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#inDaylightTime(java.util.Date) |
| */ |
| public boolean inDaylightTime(Date date) { |
| return javatz.inDaylightTime(date); |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#setRawOffset(int) |
| */ |
| public void setRawOffset(int offsetMillis) { |
| if (isFrozen()) { |
| throw new UnsupportedOperationException("Attempt to modify a frozen JavaTimeZone instance."); |
| } |
| javatz.setRawOffset(offsetMillis); |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#useDaylightTime() |
| */ |
| public boolean useDaylightTime() { |
| return javatz.useDaylightTime(); |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#observesDaylightTime() |
| */ |
| public boolean observesDaylightTime() { |
| if (mObservesDaylightTime != null) { |
| // Java 7+ |
| try { |
| return (Boolean)mObservesDaylightTime.invoke(javatz, (Object[]) null); |
| } catch (IllegalAccessException e) { |
| } catch (IllegalArgumentException e) { |
| } catch (InvocationTargetException e) { |
| } |
| } |
| return super.observesDaylightTime(); |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#getDSTSavings() |
| */ |
| public int getDSTSavings() { |
| return javatz.getDSTSavings(); |
| } |
| |
| public java.util.TimeZone unwrap() { |
| return javatz; |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#clone() |
| */ |
| public Object clone() { |
| if (isFrozen()) { |
| return this; |
| } |
| return cloneAsThawed(); |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#hashCode() |
| */ |
| public int hashCode() { |
| return super.hashCode() + javatz.hashCode(); |
| } |
| |
| private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException { |
| s.defaultReadObject(); |
| javacal = new java.util.GregorianCalendar(javatz); |
| } |
| |
| // Freezable stuffs |
| private transient volatile boolean isFrozen = false; |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#isFrozen() |
| */ |
| public boolean isFrozen() { |
| return isFrozen; |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#freeze() |
| */ |
| public TimeZone freeze() { |
| isFrozen = true; |
| return this; |
| } |
| |
| /* (non-Javadoc) |
| * @see com.ibm.icu.util.TimeZone#cloneAsThawed() |
| */ |
| public TimeZone cloneAsThawed() { |
| JavaTimeZone tz = (JavaTimeZone)super.cloneAsThawed(); |
| tz.javatz = (java.util.TimeZone)javatz.clone(); |
| tz.javacal = (java.util.GregorianCalendar)javacal.clone(); |
| tz.isFrozen = false; |
| return tz; |
| } |
| |
| } |
