org.zkoss.util
Class Locales

java.lang.Object
  org.zkoss.util.Locales

public class Locales
extends java.lang.Object

The locale relevant utilities.

Author:

tomyeh

Constructor Summary

Locales()

Method Summary

static java.util.Locale	getByFallback(java.util.Collection<java.util.Locale> values, java.util.Locale locale) Returns any occurrence of the specified Locale or any its fallback in the value collection, or null if not found.
static java.util.Locale	getCurrent() Returns the current locale; never null.
static java.util.Locale	getLocale(java.util.Locale locale) Converts a Locale to one of them being used before.
static java.util.Locale	getLocale(java.lang.String localeString) Converts a string that consists of language, country and variant to a locale.
static java.util.Locale	getLocale(java.lang.String localeString, char separator) Converts a string that consists of language, country and variant to a locale.
static java.util.Locale	getThreadLocal() Returns the locale defined by setThreadLocal(java.util.Locale).
static int	indexOfUnderline(java.lang.String s) Returns the index of '_' preceding the country part.
static int	indexOfUnderline(java.lang.String s, int j) Returns the index of '_' preceding the country part, starting from j.
static java.util.Locale	setThreadLocal(java.util.Locale locale) Sets the locale for the current thread only.
static boolean	testCurrent(java.lang.String lang, java.lang.String country) Returns whether the current locale (getCurrent()) belongs to the specified language and/or country.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Locales

public Locales()

Method Detail

getCurrent

public static final java.util.Locale getCurrent()

Returns the current locale; never null. This is the locale that every other objects shall use, unless they have special consideration.

Default: If setThreadLocal(java.util.Locale) was called with non-null, the value is returned. Otherwise, Locale.getDefault() is returned,

testCurrent

public static final boolean testCurrent(java.lang.String lang,
                                        java.lang.String country)

Returns whether the current locale (getCurrent()) belongs to the specified language and/or country.

Parameters:

lang - the language code, e.g., en and zh. Ignored if null.

country - the country code, e.g., US. Ignored if null. If empty, it means no country code at all.

setThreadLocal

public static final java.util.Locale setThreadLocal(java.util.Locale locale)

Sets the locale for the current thread only.

Each thread could have an independent locale, called the thread locale.

When Invoking this method under a thread that serves requests, remember to clean up the setting upon completing each request.

Locale old = Locales.setThreadLocal(newValue);
try { 
  ...
} finally {
  Locales.setThreadLocal(old);
}

Parameters:

locale - the thread locale; null to denote no thread locale

Returns:

the previous thread locale

getThreadLocal

public static final java.util.Locale getThreadLocal()

Returns the locale defined by setThreadLocal(java.util.Locale).

Since:

3.0.0

See Also:

getCurrent()

getLocale

public static final java.util.Locale getLocale(java.lang.String localeString,
                                               char separator)

Converts a string that consists of language, country and variant to a locale.

The separator between language, country and variant is customizable, and whitespaces are ignored, e.g., "zh_TW" and "zh, TW".

Thus, locale.equals(Locales.getLocale(locale.toString(), '_')).

Parameters:

localeString - the locale in string; null is OK

separator - the separator; ((char)0) means to decide automatically (either ',' or '_')

Returns:

the locale or null if locale is null or empty

getLocale

public static final java.util.Locale getLocale(java.lang.String localeString)

Converts a string that consists of language, country and variant to a locale.

A shortcut: getLocale(localeString, (char)0).

getLocale

public static final java.util.Locale getLocale(java.util.Locale locale)

Converts a Locale to one of them being used before. To save memory (since locale is used frequently), it is suggested to pass thru this method after creating a new instance of Locale.
Example, getLocale(new Locale(...)).

This method first look for any locale

getByFallback

public static java.util.Locale getByFallback(java.util.Collection<java.util.Locale> values,
                                             java.util.Locale locale)

Returns any occurrence of the specified Locale or any its fallback in the value collection, or null if not found. By fallback, we mean will try without variant and country. Example, if locale is zh_TW, it will try zh_TW and then zh.

indexOfUnderline

public static int indexOfUnderline(java.lang.String s,
                                   int j)

Returns the index of '_' preceding the country part, starting from j. It is similar to s.indexOf('_', j), except it detects country part (which must be only two letter in lower cases.

indexOfUnderline

public static int indexOfUnderline(java.lang.String s)

Returns the index of '_' preceding the country part. It is similar to s.indexOf('_'), except it detects country part (which must be only two letter in lower cases.