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bug 59805: avoid memory leaks if time zone or locale are never set or user never resets the time zone or locale; patch from apptaro 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1751739 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Javen O'Neal 2016-07-07 01:10:24 +00:00
parent 5c43bcf436
commit 2365d88bd4
1 changed files with 20 additions and 26 deletions
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42
src/java/org/apache/poi/util/LocaleUtil.java
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@ -52,21 +52,8 @@ public final class LocaleUtil {
*/ */
public static final Charset CHARSET_1252 = Charset.forName("CP1252"); public static final Charset CHARSET_1252 = Charset.forName("CP1252");
private static final ThreadLocal<TimeZone> userTimeZone = new ThreadLocal<TimeZone>() { private static final ThreadLocal<TimeZone> userTimeZone = new ThreadLocal<TimeZone>();
@Override private static final ThreadLocal<Locale> userLocale = new ThreadLocal<Locale>();
@SuppressForbidden("implementation around default locales in POI")
protected TimeZone initialValue() {
return TimeZone.getDefault();
}
};
private static final ThreadLocal<Locale> userLocale = new ThreadLocal<Locale>() {
@Override
@SuppressForbidden("implementation around default locales in POI")
protected Locale initialValue() {
return Locale.getDefault();
}
};
/** /**
* As time zone information is not stored in any format, it can be * As time zone information is not stored in any format, it can be
@ -80,12 +67,17 @@ public final class LocaleUtil {
} }
/** /**
* @return the time zone which is used for date calculations, defaults to UTC * @return the time zone which is used for date calculations. If not set, returns {@link TimeZone#getDefault()}.
*/ */
@SuppressForbidden("implementation around default locales in POI")
public static TimeZone getUserTimeZone() { public static TimeZone getUserTimeZone() {
return userTimeZone.get(); TimeZone timeZone = userTimeZone.get();
return (timeZone != null) ? timeZone : TimeZone.getDefault();
} }
/**
* Clear the thread-local user time zone.
*/
public static void resetUserTimeZone() { public static void resetUserTimeZone() {
userTimeZone.remove(); userTimeZone.remove();
} }
@ -98,15 +90,17 @@ public final class LocaleUtil {
userLocale.set(locale); userLocale.set(locale);
} }
public static void resetUserLocale() { /**
userLocale.remove(); * @return the default user locale. If not set, returns {@link Locale#getDefault()}.
*/
@SuppressForbidden("implementation around default locales in POI")
public static Locale getUserLocale() {
Locale locale = userLocale.get();
return (locale != null) ? locale : Locale.getDefault();
} }
/** public static void resetUserLocale() {
* @return the default user locale, defaults to {@link Locale#ROOT} userLocale.remove();
*/
public static Locale getUserLocale() {
return userLocale.get();
} }
/** /**