< prev index next >
src/java.base/share/classes/java/util/TimeZone.java
Print this page
@@ -40,10 +40,13 @@
import java.io.Serializable;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.time.ZoneId;
+
+import sun.misc.JavaUtilTimeZoneAccess;
+import sun.misc.SharedSecrets;
import sun.security.action.GetPropertyAction;
import sun.util.calendar.ZoneInfo;
import sun.util.calendar.ZoneInfoFile;
import sun.util.locale.provider.TimeZoneNameUtility;
@@ -129,10 +132,20 @@
* @see SimpleTimeZone
* @author Mark Davis, David Goldsmith, Chen-Lieh Huang, Alan Liu
* @since 1.1
*/
abstract public class TimeZone implements Serializable, Cloneable {
+
+ static {
+ SharedSecrets.setJavaUtilTimeZoneAccess(new JavaUtilTimeZoneAccess() {
+ @Override
+ public TimeZone getDefaultRef() {
+ return TimeZone.getDefaultRef();
+ }
+ });
+ }
+
/**
* Sole constructor. (For invocation by subclass constructors, typically
* implicit.)
*/
public TimeZone() {
@@ -291,10 +304,11 @@
{
if (ID == null) {
throw new NullPointerException();
}
this.ID = ID;
+ this.zoneId = null; // invalidate cache
}
/**
* Returns a long standard time name of this {@code TimeZone} suitable for
* presentation to the user in the default locale.
@@ -542,20 +556,26 @@
* @return a {@code ZoneId} representing the same time zone as this
* {@code TimeZone}
* @since 1.8
*/
public ZoneId toZoneId() {
+ ZoneId zId = zoneId;
+ if (zId == null) {
String id = getID();
if (ZoneInfoFile.useOldMapping() && id.length() == 3) {
if ("EST".equals(id))
- return ZoneId.of("America/New_York");
- if ("MST".equals(id))
- return ZoneId.of("America/Denver");
- if ("HST".equals(id))
- return ZoneId.of("America/Honolulu");
+ zId = ZoneId.of("America/New_York");
+ else if ("MST".equals(id))
+ zId = ZoneId.of("America/Denver");
+ else if ("HST".equals(id))
+ zId = ZoneId.of("America/Honolulu");
+ } else {
+ zId = ZoneId.of(id, ZoneId.SHORT_IDS);
+ }
+ zoneId = zId;
}
- return ZoneId.of(id, ZoneId.SHORT_IDS);
+ return zId;
}
private static TimeZone getTimeZone(String ID, boolean fallback) {
TimeZone tz = ZoneInfo.getTimeZone(ID);
if (tz == null) {
@@ -708,11 +728,11 @@
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(new PropertyPermission
("user.timezone", "write"));
}
- defaultTimeZone = zone;
+ defaultTimeZone = (TimeZone) zone.clone();
}
/**
* Returns true if this zone has the same rule and offset as another zone.
* That is, if this zone differs only in ID, if at all. Returns false
@@ -733,13 +753,11 @@
* @return a clone of this <code>TimeZone</code>
*/
public Object clone()
{
try {
- TimeZone other = (TimeZone) super.clone();
- other.ID = ID;
- return other;
+ return super.clone();
} catch (CloneNotSupportedException e) {
throw new InternalError(e);
}
}
@@ -757,10 +775,16 @@
* display names. <code>ID</code> values are unique in the system
* table but may not be for dynamically created zones.
* @serial
*/
private String ID;
+
+ /**
+ * Cached {@link ZoneId} for this TimeZone
+ */
+ private transient ZoneId zoneId;
+
private static volatile TimeZone defaultTimeZone;
static final String GMT_ID = "GMT";
private static final int GMT_ID_LENGTH = 3;
< prev index next >