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/*
* @(#)Locale.java 1.21 97/01/29
*
* (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
* (C) Copyright IBM Corp. 1996 - 1998 - All Rights Reserved
*
* Portions copyright (c) 1996 Sun Microsystems, Inc. All Rights Reserved.
*
* The original version of this source code and documentation is copyrighted
* and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
* materials are provided under terms of a License Agreement between Taligent
* and Sun. This technology is protected by multiple US and International
* patents. This notice and attribution to Taligent may not be removed.
* Taligent is a registered trademark of Taligent, Inc.
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for NON-COMMERCIAL purposes and without
* fee is hereby granted provided that this copyright notice
* appears in all copies. Please refer to the file "copyright.html"
* for further important copyright and licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
* THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
*
*/
package java.util;
import java.io.Serializable;
import java.text.MessageFormat;
/**
*
* A <code>Locale</code> object represents a specific geographical, political,
* or cultural region. An operation that requires a <code>Locale</code> to perform
* its task is called <em>locale-sensitive</em> and uses the <code>Locale</code>
* to tailor information for the user. For example, displaying a number
* is a locale-sensitive operation--the number should be formatted
* according to the customs/conventions of the user's native country,
* region, or culture.
*
* <P>
* You create a <code>Locale</code> object using one of the two constructors in
* this class:
* <blockquote>
* <pre>
* Locale(String language, String country)
* Locale(String language, String country, String variant)
* </pre>
* </blockquote>
* The first argument to both constructors is a valid <STRONG>ISO
* Language Code.</STRONG> These codes are the lower-case two-letter
* codes as defined by ISO-639.
* You can find a full list of these codes at a number of sites, such as:
* <BR><a href ="http://www.ics.uci.edu/pub/ietf/http/related/iso639.txt">
* <code>http://www.ics.uci.edu/pub/ietf/http/related/iso639.txt</code></a>
*
* <P>
* The second argument to both constructors is a valid <STRONG>ISO Country
* Code.</STRONG> These codes are the upper-case two-letter codes
* as defined by ISO-3166.
* You can find a full list of these codes at a number of sites, such as:
* <BR><a href="http://www.chemie.fu-berlin.de/diverse/doc/ISO_3166.html">
* <code>http://www.chemie.fu-berlin.de/diverse/doc/ISO_3166.html</code></a>
*
* <P>
* The second constructor requires a third argument--the <STRONG>Variant.</STRONG>
* The Variant codes are vendor and browser-specific.
* For example, use WIN for Windows, MAC for Macintosh, and POSIX for POSIX.
* Where there are two variants, separate them with an underscore, and
* put the most important one first. For
* example, a Traditional Spanish collation might be referenced, with
* "ES", "ES", "Traditional_WIN".
*
* <P>
* Because a <code>Locale</code> object is just an identifier for a region,
* no validity check is performed when you construct a <code>Locale</code>.
* If you want to see whether particular resources are available for the
* <code>Locale</code> you construct, you must query those resources. For
* example, ask the <code>NumberFormat</code> for the locales it supports
* using its <code>getAvailableLocales</code> method.
* <BR><STRONG>Note:</STRONG> When you ask for a resource for a particular
* locale, you get back the best available match, not necessarily
* precisely what you asked for. For more information, look at
* <a href="java.util.ResourceBundle.html"><code>ResourceBundle</code></a>.
*
* <P>
* The <code>Locale</code> class provides a number of convenient constants
* that you can use to create <code>Locale</code> objects for commonly used
* locales. For example, the following creates a <code>Locale</code> object
* for the United States:
* <blockquote>
* <pre>
* Locale.US
* </pre>
* </blockquote>
*
* <P>
* Once you've created a <code>Locale</code> you can query it for information about
* itself. Use <code>getCountry</code> to get the ISO Country Code and
* <code>getLanguage</code> to get the ISO Language Code. You can
* use <code>getDisplayCountry</code> to get the
* name of the country suitable for displaying to the user. Similarly,
* you can use <code>getDisplayLanguage</code> to get the name of
* the language suitable for displaying to the user. Interestingly,
* the <code>getDisplayXXX</code> methods are themselves locale-sensitive
* and have two versions: one that uses the default locale and one
* that uses the locale specified as an argument.
*
* <P>
* The JDK provides a number of classes that perform locale-sensitive
* operations. For example, the <code>NumberFormat</code> class formats
* numbers, currency, or percentages in a locale-sensitive manner. Classes
* such as <code>NumberFormat</code> have a number of convenience methods
* for creating a default object of that type. For example, the
* <code>NumberFormat</code> class provides these three convenience methods
* for creating a default <code>NumberFormat</code> object:
* <blockquote>
* <pre>
* NumberFormat.getInstance()
* NumberFormat.getCurrencyInstance()
* NumberFormat.getPercentInstance()
* </pre>
* </blockquote>
* These methods have two variants; one with an explicit locale
* and one without; the latter using the default locale.
* <blockquote>
* <pre>
* NumberFormat.getInstance(myLocale)
* NumberFormat.getCurrencyInstance(myLocale)
* NumberFormat.getPercentInstance(myLocale)
* </pre>
* </blockquote>
* A <code>Locale</code> is the mechanism for identifying the kind of object
* (<code>NumberFormat</code>) that you would like to get. The locale is
* <STRONG>just</STRONG> a mechanism for identifying objects,
* <STRONG>not</STRONG> a container for the objects themselves.
*
* <P>
* Each class that performs locale-sensitive operations allows you
* to get all the available objects of that type. You can sift
* through these objects by language, country, or variant,
* and use the display names to present a menu to the user.
* For example, you can create a menu of all the collation objects
* suitable for a given language. Such classes must implement these
* three class methods:
* <blockquote>
* <pre>
* public static Locale[] getAvailableLocales()
* public static String getDisplayName(Locale objectLocale,
* Locale displayLocale)
* public static final String getDisplayName(Locale objectLocale)
* // getDisplayName will throw MissingResourceException if the locale
* // is not one of the available locales.
* </pre>
* </blockquote>
*
* @see ResourceBundle
* @see java.text.Format
* @see java.text.NumberFormat
* @see java.text.Collation
* @version 1.21 29 Jan 1997
* @author Mark Davis
*/
public final class Locale implements Cloneable, Serializable {
/** Useful constant for language.
*/
static public final Locale ENGLISH = new Locale("en","","");
/** Useful constant for language.
*/
static public final Locale FRENCH = new Locale("fr","","");
/** Useful constant for language.
*/
static public final Locale GERMAN = new Locale("de","","");
/** Useful constant for language.
*/
static public final Locale ITALIAN = new Locale("it","","");
/** Useful constant for language.
*/
static public final Locale JAPANESE = new Locale("ja","","");
/** Useful constant for language.
*/
static public final Locale KOREAN = new Locale("ko","","");
/** Useful constant for language.
*/
static public final Locale CHINESE = new Locale("zh","","");
/** Useful constant for language.
*/
static public final Locale SIMPLIFIED_CHINESE = new Locale("zh","CN","");
/** Useful constant for language.
*/
static public final Locale TRADITIONAL_CHINESE = new Locale("zh","TW","");
/** Useful constant for country.
*/
static public final Locale FRANCE = new Locale("fr","FR","");
/** Useful constant for country.
*/
static public final Locale GERMANY = new Locale("de","DE","");
/** Useful constant for country.
*/
static public final Locale ITALY = new Locale("it","IT","");
/** Useful constant for country.
*/
static public final Locale JAPAN = new Locale("ja","JP","");
/** Useful constant for country.
*/
static public final Locale KOREA = new Locale("ko","KR","");
/** Useful constant for country.
*/
static public final Locale CHINA = new Locale("zh","CN","");
/** Useful constant for country.
*/
static public final Locale PRC = new Locale("zh","CN","");
/** Useful constant for country.
*/
static public final Locale TAIWAN = new Locale("zh","TW","");
/** Useful constant for country.
*/
static public final Locale UK = new Locale("en","GB","");
/** Useful constant for country.
*/
static public final Locale US = new Locale("en","US","");
/** Useful constant for country.
*/
static public final Locale CANADA = new Locale("en","CA","");
/** Useful constant for country.
*/
static public final Locale CANADA_FRENCH = new Locale("fr","CA","");
/** serialization ID
*/
static final long serialVersionUID = 9149081749638150636L;
/**
* Construct a locale from language, country, variant.
* NOTE: ISO 639 is not a stable standard; some of the language codes it defines
* (specifically iw, ji, and in) have changed. This constructor accepts both the
* old codes (iw, ji, and in) and the new codes (he, yi, and id), but all other
* API on Locale will return only the OLD codes.
* @param language lowercase two-letter ISO-639 code.
* @param country uppercase two-letter ISO-3166 code.
* @param variant vendor and browser specific code. See class description.
*/
public Locale(String language, String country, String variant) {
// we accept both the old and the new ISO codes for the languages whose ISO
// codes have changed, but we always store the OLD code, for backward compatibility
language = toLowerCase(language).intern();
if (language == "he")
language = "iw";
else if (language == "yi")
language = "ji";
else if (language == "id")
language = "in";
this.language = language;
this.country = toUpperCase(country).intern();
this.variant = toUpperCase(variant).intern();
}
/**
* Construct a locale from language, country.
* NOTE: ISO 639 is not a stable standard; some of the language codes it defines
* (specifically iw, ji, and in) have changed. This constructor accepts both the
* old codes (iw, ji, and in) and the new codes (he, yi, and id), but all other
* API on Locale will return only the OLD codes.
* @param language lowercase two-letter ISO-639 code.
* @param country uppercase two-letter ISO-3166 code.
*/
public Locale(String language, String country) {
this(language, country, "");
}
/**
* Common method of getting the current default Locale.
* Used for the presentation: menus, dialogs, etc.
* Generally set once when your applet or application is initialized,
* then never reset. (If you do reset the default locale, you
* probably want to reload your GUI, so that the change is reflected
* in your interface.)
* <p>More advanced programs will allow users to use different locales
* for different fields, e.g. in a spreadsheet.
* <BR>Note that the initial setting will match the host system.
*/
public static Locale getDefault() {
return defaultLocale; // this variable is now initialized at static init time
}
/**
* Sets the default.
* Normally set once at the beginning of applet or application,
* then never reset. <code>setDefault</code> does not reset the host locale.
* @param newLocale Locale to set to.
*/
public static synchronized void setDefault(Locale newLocale) {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkPropertyAccess("user.language");
}
defaultLocale = newLocale;
}
/**
* Getter for programmatic name of field,
* an lowercased two-letter ISO-639 code.
* @see #getDisplayLanguage
*/
public String getLanguage() {
return language;
}
/**
* Getter for programmatic name of field,
* an uppercased two-letter ISO-3166 code.
* @see #getDisplayCountry
*/
public String getCountry() {
return country;
}
/**
* Getter for programmatic name of field.
* @see #getDisplayVariant
*/
public String getVariant() {
return variant;
}
/**
* Getter for the programmatic name of the entire locale,
* with the language, country and variant separated by underbars.
* Language is always lower case, and country is always uppcer case.
* If a field is missing, at most one underbar will occur.
* Example: "Een, "de_DE", "en_US_WIN", "de_POSIX", "fr_MAC"
* @see #getDisplayName
*/
public final String toString() {
StringBuffer result = new StringBuffer(language);
if (country.length() != 0) {
result.append('_');
result.append(country);
if (variant.length() != 0) {
result.append('_');
result.append(variant);
}
}
return result.toString();
}
/**
* Getter for the three-letter ISO language abbreviation
* of the locale. Returns the empty string if the locale doesn't specify a language.
* @exception MissingResourceException Throws MissingResourceException if the
* three-letter language abbreviation is not available for this locale.
*/
public String getISO3Language() throws MissingResourceException {
if (language.length() == 0)
return "";
// the call to getISO2Language() will throw a MissingResourceException if
// the appropriate locale isn't installed
getISO2Language();
ResourceBundle resource = ResourceBundle.getBundle
("java.text.resources.LocaleElements", this);
return resource.getString("ShortLanguage");
}
/**
* Getter for the three-letter ISO country abbreviation
* of the locale. Returns the empty string if the locale doesn't specify a country.
* @exception MissingResourceException Throws MissingResourceException if the
* three-letter language abbreviation is not available for this locale.
*/
public String getISO3Country() throws MissingResourceException {
if (country.length() == 0)
return "";
// the call to getISO2Country() will throw a MissingResourceException if
// the appropriate locale isn't installed
getISO2Country();
ResourceBundle resource = ResourceBundle.getBundle
("java.text.resources.LocaleElements", this);
return resource.getString("ShortCountry");
}
/**
* Getter for the two-letter ISO language abbreviation
* of the locale. Returns the empty string if the locale doesn't specify a language.
* @exception MissingResourceException Throws MissingResourceException if the
* two-letter language abbreviation is not available for this locale.
*/
/*public*/ String getISO2Language() throws MissingResourceException {
if (language.length() == 0)
return "";
ResourceBundle resource = ResourceBundle.getBundle
("java.text.resources.LocaleElements", this);
String localeID = resource.getString("LocaleString");
String result = localeID.substring(0, 2);
if (!result.equals(language))
throw new MissingResourceException("Requested resource bundle not installed",
"LocaleElements", "LocaleString");
return result;
}
/**
* Getter for the two-letter ISO country abbreviation
* of the locale. Returns the empty string if the locale doesn't specify a country.
* @exception MissingResourceException Throws MissingResourceException if the
* two-letter language abbreviation is not available for this locale.
*/
/*public*/ String getISO2Country() throws MissingResourceException {
if (country.length() == 0)
return "";
ResourceBundle resource = ResourceBundle.getBundle
("java.text.resources.LocaleElements", this);
String localeID = resource.getString("LocaleString");
String result = localeID.substring(3, 5);
if (!result.equals(country))
throw new MissingResourceException("Requested resource bundle not installed",
"LocaleElements", "LocaleString");
return result;
}
/**
* Returns a name for the locale's language that is appropriate for display to the
* user. This will be the name the locale's language localized for the default locale,
* if that data is available. For example, if the locale is fr_FR and the default locale
* is en_US, getDisplayLanguage() will return "French"; if the locale is en_US and
* the default locale is fr_FR, getDisplayLanguage() will return "anglais". If the
* appropriate name isn't available (say, we don't have a Japanese name for Croatian),
* this function falls back on the English name and uses the ISO code as a last-resort
* value. If the locale doesn't specify a language, this function returns the empty string.
*/
public final String getDisplayLanguage() {
return getDisplayLanguage(getDefault());
}
/**
* Returns a name for the locale's language that is appropriate for display to the
* user. This will be the name the locale's language localized for inLocale,
* if that data is available. For example, if the locale is fr_FR and inLocale
* is en_US, getDisplayLanguage() will return "French"; if the locale is en_US and
* inLocale is fr_FR, getDisplayLanguage() will return "anglais". If the
* appropriate name isn't available (say, we don't have a Japanese name for Croatian),
* this function falls back on the default locale, on the English name, and finally
* on the ISO code as a last-resort value. If the locale doesn't specify a language,
* this function returns the empty string.
*/
public String getDisplayLanguage(Locale inLocale) {
String langCode = language;
if (langCode.length() == 0)
return "";
Locale workingLocale = (Locale)inLocale.clone();
String result = null;
int phase = 0;
boolean done = false;
if (workingLocale.variant.length() == 0)
phase = 1;
if (workingLocale.country.length() == 0)
phase = 2;
while (!done) {
try {
ResourceBundle bundle = ResourceBundle.getBundle(
"java.text.resources.LocaleElements", workingLocale);
result = findStringMatch((String[][])bundle.getObject("Languages"),
langCode, langCode);
if (result.length() != 0)
done = true;
}
catch (Exception e) {
// just fall through
}
if (!done) {
switch (phase) {
case 0:
workingLocale.variant = "";
break;
case 1:
workingLocale.country = "";
break;
case 2:
workingLocale = getDefault();
break;
case 3:
workingLocale = new Locale("", "", "");
break;
default:
return langCode;
}
phase++;
}
}
return result;
}
/**
* Returns a name for the locale's country that is appropriate for display to the
* user. This will be the name the locale's country localized for the default locale,
* if that data is available. For example, if the locale is fr_FR and the default locale
* is en_US, getDisplayCountry() will return "France"; if the locale is en_US and
* the default locale is fr_FR, getDisplayLanguage() will return "Etats-Unis". If the
* appropriate name isn't available (say, we don't have a Japanese name for Croatia),
* this function falls back on the English name and uses the ISO code as a last-resort
* value. If the locale doesn't specify a country, this function returns the empty string.
*/
public final String getDisplayCountry() {
return getDisplayCountry(getDefault());
}
/**
* Returns a name for the locale's country that is appropriate for display to the
* user. This will be the name the locale's country localized for inLocale,
* if that data is available. For example, if the locale is fr_FR and inLocale
* is en_US, getDisplayCountry() will return "France"; if the locale is en_US and
* inLocale is fr_FR, getDisplayLanguage() will return "Etats-Unis". If the
* appropriate name isn't available (say, we don't have a Japanese name for Croatia),
* this function falls back on the default locale, on the English name, and finally
* on the ISO code as a last-resort value. If the locale doesn't specify a country,
* this function returns the empty string.
*/
public String getDisplayCountry(Locale inLocale) {
String ctryCode = country;
if (ctryCode.length() == 0)
return "";
Locale workingLocale = (Locale)inLocale.clone();
String result = null;
int phase = 0;
boolean done = false;
if (workingLocale.variant.length() == 0)
phase = 1;
if (workingLocale.country.length() == 0)
phase = 2;
while (!done) {
try {
ResourceBundle bundle = ResourceBundle.getBundle(
"java.text.resources.LocaleElements", workingLocale);
result = findStringMatch((String[][])bundle.getObject("Countries"),
ctryCode, ctryCode);
if (result.length() != 0)
done = true;
}
catch (Exception e) {
// just fall through
}
if (!done) {
switch (phase) {
case 0:
workingLocale.variant = "";
break;
case 1:
workingLocale.country = "";
break;
case 2:
workingLocale = getDefault();
break;
case 3:
workingLocale = new Locale("", "", "");
break;
default:
return ctryCode;
}
phase++;
}
}
return result;
}
/**
* Returns a name for the locale's variant code that is appropriate for display to the
* user. If possible, the name will be localized for the default locale. If the locale
* doesn't specify a variant code, this function returns the empty string.
*/
public final String getDisplayVariant() {
return getDisplayVariant(getDefault());
}
/**
* Returns a name for the locale's variant code that is appropriate for display to the
* user. If possible, the name will be localized for inLocale. If the locale
* doesn't specify a variant code, this function returns the empty string.
*/
public String getDisplayVariant(Locale inLocale) {
if (variant.length() == 0)
return "";
ResourceBundle bundle = ResourceBundle.getBundle(
"java.text.resources.LocaleElements", inLocale);
String names[] = getDisplayVariantArray(bundle);
// Get the localized patterns for formatting a list, and use
// them to format the list.
String[] patterns;
try {
patterns = (String[])bundle.getObject("LocaleNamePatterns");
}
catch (MissingResourceException e) {
patterns = null;
}
return formatList(patterns, names);
}
/**
* Returns a name for the locale that is appropriate for display to the
* user. This will be the values returned by getDisplayLanguage(), getDisplayCountry(),
* and getDisplayVariant() assembled into a single string. The display name will have
* one of the following forms:<p><blockquote>
* language (country, variant)<p>
* language (country)<p>
* language (variant)<p>
* country (variant)<p>
* language<p>
* country<p>
* variant<p></blockquote>
* depending on which fields are specified in the locale. If the language, country,
* and variant fields are all empty, this function returns the empty string.
*/
public final String getDisplayName() {
return getDisplayName(getDefault());
}
/**
* Returns a name for the locale that is appropriate for display to the
* user. This will be the values returned by getDisplayLanguage(), getDisplayCountry(),
* and getDisplayVariant() assembled into a single string. The display name will have
* one of the following forms:<p><blockquote>
* language (country, variant)<p>
* language (country)<p>
* language (variant)<p>
* country (variant)<p>
* language<p>
* country<p>
* variant<p></blockquote>
* depending on which fields are specified in the locale. If the language, country,
* and variant fields are all empty, this function returns the empty string.
*/
public String getDisplayName(Locale inLocale) {
ResourceBundle bundle = ResourceBundle.getBundle(
"java.text.resources.LocaleElements", inLocale);
String languageName = getDisplayLanguage(inLocale);
String countryName = getDisplayCountry(inLocale);
String[] variantNames = getDisplayVariantArray(bundle);
// Get the localized patterns for formatting a display name.
String[] patterns;
try {
patterns = (String[])bundle.getObject("LocaleNamePatterns");
}
catch (MissingResourceException e) {
patterns = null;
}
// The display name consists of a main name, followed by qualifiers.
// Typically, the format is "MainName (Qualifier, Qualifier)" but this
// depends on what pattern is stored in the display locale.
String mainName = null;
String[] qualifierNames = null;
// The main name is the language, or if there is no language, the country.
// If there is neither language nor country (an anomalous situation) then
// the display name is simply the variant's display name.
if (languageName.length() != 0) {
mainName = languageName;
if (countryName.length() != 0) {
qualifierNames = new String[variantNames.length + 1];
System.arraycopy(variantNames, 0, qualifierNames, 1, variantNames.length);
qualifierNames[0] = countryName;
}
else qualifierNames = variantNames;
}
else if (countryName.length() != 0) {
mainName = countryName;
qualifierNames = variantNames;
}
else {
return formatList(patterns, variantNames);
}
// Create an array whose first element is the number of remaining
// elements. This serves as a selector into a ChoiceFormat pattern from
// the resource. The second and third elements are the main name and
// the qualifier; if there are no qualifiers, the third element is
// unused by the format pattern.
Object[] displayNames = {
new Integer(qualifierNames.length != 0 ? 2 : 1),
mainName,
// We could also just call formatList() and have it handle the empty
// list case, but this is more efficient, and we want it to be
// efficient since all the language-only locales will not have any
// qualifiers.
qualifierNames.length != 0 ? formatList(patterns, qualifierNames) : null
};
if (patterns != null) {
return new MessageFormat(patterns[0]).format(displayNames);
}
else {
// If we cannot get the message format pattern, then we use a simple
// hard-coded pattern. This should not occur in practice unless the
// installation is missing some core files (LocaleElements etc.).
StringBuffer result = new StringBuffer();
result.append((String)displayNames[1]);
if (displayNames.length > 2) {
result.append(" (");
result.append((String)displayNames[2]);
result.append(")");
}
return result.toString();
}
}
/**
* Overrides Cloneable
*/
public Object clone()
{
try {
Locale that = (Locale)super.clone();
return that;
} catch (CloneNotSupportedException e) {
throw new InternalError();
}
}
/**
* Override hashCode.
* Since Locales are often used in hashtables, caches the value
* for speed.
*/
// XXX Depending on performance of synchronized, may want to
// XXX just compute in constructor.
public synchronized int hashCode() {
if (hashcode == -1) {
hashcode =
language.hashCode() ^
country.hashCode() ^
variant.hashCode();
}
return hashcode;
}
// Overrides
public boolean equals(Object obj) {
if (this == obj) // quick check
return true;
if (!(obj instanceof Locale)) // (1) same object?
return false;
Locale other = (Locale) obj;
if (hashCode() != other.hashCode()) return false; // quick check
if (!language.equals(other.language)) return false;
if (!country.equals(other.country)) return false;
if (!variant.equals(other.variant)) return false;
return true; // we made it through the guantlet.
// (1) We don't check super.equals since it is Object.
// Since Locale is final, we don't have to check both directions.
}
// ================= privates =====================================
// XXX instance and class variables. For now keep these separate, since it is
// faster to match. Later, make into single string.
private String language = "";
private String country = "";
private String variant = "";
// this field really should be transient, but we made the mistake of letting it
// ship this way, so now we're stuck with it
private int hashcode = -1; // lazy evaluated
private static Locale defaultLocale;
static {
/* The user.region property may be of the form country, country_variant,
* or _variant. Since the Locale constructor takes the country value as
* an unparsed literal, and we don't want to change that behavior, we
* must premunge it here into country and variant. Liu 7/9/98
*/
String country = System.getProperty("user.region", "");
String variant = "";
int i = country.indexOf('_');
if (i >= 0) {
variant = country.substring(i+1);
country = country.substring(0, i);
}
defaultLocale = new Locale(System.getProperty("user.language", "EN"),
country, variant);
}
/*
* Locale needs its own, locale insenitive version of toLowerCase to
* avoid circularity problems between Locale and String.
* The most straightforward algorithm is used. Look at optimizations later.
*/
private String toLowerCase(String str) {
char[] buf = str.toCharArray();
for (int i = 0; i < buf.length; i++) {
buf[i] = Character.toLowerCase( buf[i] );
}
return new String( buf );
}
/*
* Locale needs its own, locale insenitive version of toUpperCase to
* avoid circularity problems between Locale and String.
* The most straightforward algorithm is used. Look at optimizations later.
*/
private String toUpperCase(String str) {
char[] buf = str.toCharArray();
for (int i = 0; i < buf.length; i++) {
buf[i] = Character.toUpperCase( buf[i] );
}
return new String( buf );
}
private String findStringMatch(String[][] languages,
String desiredLanguage, String fallbackLanguage)
{
for (int i = 0; i < languages.length; ++i)
if (desiredLanguage.equals(languages[i][0]))
return languages[i][1];
if (!fallbackLanguage.equals(desiredLanguage))
for (int i = 0; i < languages.length; ++i)
if (fallbackLanguage.equals(languages[i][0]))
return languages[i][1];
if (!"EN".equals(desiredLanguage) && "EN".equals(fallbackLanguage))
for (int i = 0; i < languages.length; ++i)
if ("EN".equals(languages[i][0]))
return languages[i][1];
return "";
}
/**
* Return an array of the display names of the variant.
* @param bundle the ResourceBundle to use to get the display names
* @return an array of display names, possible of zero length.
*/
private String[] getDisplayVariantArray(ResourceBundle bundle) {
// Split the variant name into tokens separated by '_'.
StringTokenizer tokenizer = new StringTokenizer(variant, "_");
String[] names = new String[tokenizer.countTokens()];
// For each variant token, lookup the display name. If
// not found, use the variant name itself.
for (int i=0; i<names.length; ++i) {
String token = tokenizer.nextToken();
try {
names[i] = (String)bundle.getObject("%%" + token);
}
catch (MissingResourceException e) {
names[i] = token;
}
}
return names;
}
/**
* Format a list with an array of patterns.
* @param patterns an array of three patterns. The first pattern is not
* used. The second pattern should create a MessageFormat taking 0-3 arguments
* and formatting them into a list. The third pattern should take 2 arguments
* and is used by composeList. If patterns is null, then a the list is
* formatted by concatenation with the delimiter ','.
* @param stringList the list of strings to be formatted.
* @return a string representing the list.
*/
private static String formatList(String[] patterns, String[] stringList) {
// If we have no list patterns, compose the list in a simple,
// non-localized way.
if (patterns == null) {
StringBuffer result = new StringBuffer();
for (int i=0; i<stringList.length; ++i) {
if (i>0) result.append(',');
result.append(stringList[i]);
}
return result.toString();
}
// Compose the list down to three elements if necessary
if (stringList.length > 3) {
MessageFormat format = new MessageFormat(patterns[2]);
stringList = composeList(format, stringList);
}
// Rebuild the argument list with the list length as the first element
Object[] args = new Object[stringList.length + 1];
System.arraycopy(stringList, 0, args, 1, stringList.length);
args[0] = new Integer(stringList.length);
// Format it using the pattern in the resource
MessageFormat format = new MessageFormat(patterns[1]);
return format.format(args);
}
/**
* Given a list of strings, return a list shortened to three elements.
* Shorten it by applying the given format to the first two elements
* recursively.
* @param format a format which takes two arguments
* @param list a list of strings
* @return if the list is three elements or shorter, the same list;
* otherwise, a new list of three elements.
*/
private static String[] composeList(MessageFormat format, String[] list) {
if (list.length <= 3) return list;
// Use the given format to compose the first two elements into one
String[] listItems = { list[0], list[1] };
String newItem = format.format(listItems);
// Form a new list one element shorter
String[] newList = new String[list.length-1];
System.arraycopy(list, 2, newList, 1, newList.length-1);
newList[0] = newItem;
// Recurse
return composeList(format, newList);
}
}