aoqi@0: /*
aoqi@0:  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.dtdparser;
aoqi@0: 
aoqi@0: import java.io.InputStream;
aoqi@0: import java.text.FieldPosition;
aoqi@0: import java.text.MessageFormat;
aoqi@0: import java.util.Hashtable;
aoqi@0: import java.util.Locale;
aoqi@0: import java.util.MissingResourceException;
aoqi@0: import java.util.ResourceBundle;
aoqi@0: 
aoqi@0: 
aoqi@0: /**
aoqi@0:  * This class provides support for multi-language string lookup, as needed
aoqi@0:  * to localize messages from applications supporting multiple languages
aoqi@0:  * at the same time.  One class of such applications is network services,
aoqi@0:  * such as HTTP servers, which talk to clients who may not be from the
aoqi@0:  * same locale as the server.  This class supports a form of negotiation
aoqi@0:  * for the language used in presenting a message from some package, where
aoqi@0:  * both user (client) preferences and application (server) support are
aoqi@0:  * accounted for when choosing locales and formatting messages.
aoqi@0:  * <p/>
aoqi@0:  * <P> Each package should have a singleton package-private message catalog
aoqi@0:  * class.  This ensures that the correct class loader will always be used to
aoqi@0:  * access message resources, and minimizes use of memory: <PRE>
aoqi@0:  * package <em>some.package</em>;
aoqi@0:  * <p/>
aoqi@0:  * // "foo" might be public
aoqi@0:  * class foo {
aoqi@0:  * ...
aoqi@0:  * // package private
aoqi@0:  * static final Catalog messages = new Catalog ();
aoqi@0:  * static final class Catalog extends MessageCatalog {
aoqi@0:  * Catalog () { super (Catalog.class); }
aoqi@0:  * }
aoqi@0:  * ...
aoqi@0:  * }
aoqi@0:  * </PRE>
aoqi@0:  * <p/>
aoqi@0:  * <P> Messages for a known client could be generated using code
aoqi@0:  * something like this:  <PRE>
aoqi@0:  * String clientLanguages [];
aoqi@0:  * Locale clientLocale;
aoqi@0:  * String clientMessage;
aoqi@0:  * <p/>
aoqi@0:  * // client languages will probably be provided by client,
aoqi@0:  * // e.g. by an HTTP/1.1 "Accept-Language" header.
aoqi@0:  * clientLanguages = new String [] { "en-ca", "fr-ca", "ja", "zh" };
aoqi@0:  * clientLocale = foo.messages.chooseLocale (clientLanguages);
aoqi@0:  * clientMessage = foo.messages.getMessage (clientLocale,
aoqi@0:  * "fileCount",
aoqi@0:  * new Object [] { new Integer (numberOfFiles) }
aoqi@0:  * );
aoqi@0:  * </PRE>
aoqi@0:  * <p/>
aoqi@0:  * <P> At this time, this class does not include functionality permitting
aoqi@0:  * messages to be passed around and localized after-the-fact.  The consequence
aoqi@0:  * of this is that the locale for messages must be passed down through layers
aoqi@0:  * which have no normal reason to support such passdown, or else the system
aoqi@0:  * default locale must be used instead of the one the client needs.
aoqi@0:  * <p/>
aoqi@0:  * <P> <hr> The following guidelines should be used when constructiong
aoqi@0:  * multi-language applications:  <OL>
aoqi@0:  * <p/>
aoqi@0:  * <LI> Always use <a href=#chooseLocale>chooseLocale</a> to select the
aoqi@0:  * locale you pass to your <code>getMessage</code> call.  This lets your
aoqi@0:  * applications use IETF standard locale names, and avoids needless
aoqi@0:  * use of system defaults.
aoqi@0:  * <p/>
aoqi@0:  * <LI> The localized messages for a given package should always go in
aoqi@0:  * a separate <em>resources</em> sub-package.  There are security
aoqi@0:  * implications; see below.
aoqi@0:  * <p/>
aoqi@0:  * <LI> Make sure that a language name is included in each bundle name,
aoqi@0:  * so that the developer's locale will not be inadvertently used. That
aoqi@0:  * is, don't create defaults like <em>resources/Messages.properties</em>
aoqi@0:  * or <em>resources/Messages.class</em>, since ResourceBundle will choose
aoqi@0:  * such defaults rather than giving software a chance to choose a more
aoqi@0:  * appropriate language for its messages.  Your message bundles should
aoqi@0:  * have names like <em>Messages_en.properties</em> (for the "en", or
aoqi@0:  * English, language) or <em>Messages_ja.class</em> ("ja" indicates the
aoqi@0:  * Japanese language).
aoqi@0:  * <p/>
aoqi@0:  * <LI> Only use property files for messages in languages which can
aoqi@0:  * be limited to the ISO Latin/1 (8859-1) characters supported by the
aoqi@0:  * property file format.  (This is mostly Western European languages.)
aoqi@0:  * Otherwise, subclass ResourceBundle to provide your messages; it is
aoqi@0:  * simplest to subclass <code>java.util.ListResourceBundle</code>.
aoqi@0:  * <p/>
aoqi@0:  * <LI> Never use another package's message catalog or resource bundles.
aoqi@0:  * It should not be possible for a change internal to one package (such
aoqi@0:  * as eliminating or improving messages) to break another package.
aoqi@0:  * <p/>
aoqi@0:  * </OL>
aoqi@0:  * <p/>
aoqi@0:  * <P> The "resources" sub-package can be treated separately from the
aoqi@0:  * package with which it is associated.  That main package may be sealed
aoqi@0:  * and possibly signed, preventing other software from adding classes to
aoqi@0:  * the package which would be able to access methods and data which are
aoqi@0:  * not designed to be publicly accessible.  On the other hand, resources
aoqi@0:  * such as localized messages are often provided after initial product
aoqi@0:  * shipment, without a full release cycle for the product.  Such files
aoqi@0:  * (text and class files) need to be added to some package.  Since they
aoqi@0:  * should not be added to the main package, the "resources" subpackage is
aoqi@0:  * used without risking the security or integrity of that main package
aoqi@0:  * as distributed in its JAR file.
aoqi@0:  *
aoqi@0:  * @author David Brownell
aoqi@0:  * @version 1.1, 00/08/05
aoqi@0:  * @see java.util.Locale
aoqi@0:  * @see java.util.ListResourceBundle
aoqi@0:  * @see java.text.MessageFormat
aoqi@0:  */
aoqi@0: // leave this as "abstract" -- each package needs its own subclass,
aoqi@0: // else it's not always going to be using the right class loader.
aoqi@0: abstract public class MessageCatalog {
aoqi@0:     private String bundleName;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Create a message catalog for use by classes in the same package
aoqi@0:      * as the specified class.  This uses <em>Messages</em> resource
aoqi@0:      * bundles in the <em>resources</em> sub-package of class passed as
aoqi@0:      * a parameter.
aoqi@0:      *
aoqi@0:      * @param packageMember Class whose package has localized messages
aoqi@0:      */
aoqi@0:     protected MessageCatalog(Class packageMember) {
aoqi@0:         this(packageMember, "Messages");
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Create a message catalog for use by classes in the same package
aoqi@0:      * as the specified class.  This uses the specified resource
aoqi@0:      * bundle name in the <em>resources</em> sub-package of class passed
aoqi@0:      * as a parameter; for example, <em>resources.Messages</em>.
aoqi@0:      *
aoqi@0:      * @param packageMember Class whose package has localized messages
aoqi@0:      * @param bundle        Name of a group of resource bundles
aoqi@0:      */
aoqi@0:     private MessageCatalog(Class packageMember, String bundle) {
aoqi@0:         int index;
aoqi@0: 
aoqi@0:         bundleName = packageMember.getName();
aoqi@0:         index = bundleName.lastIndexOf('.');
aoqi@0:         if (index == -1)    // "ClassName"
aoqi@0:             bundleName = "";
aoqi@0:         else            // "some.package.ClassName"
aoqi@0:             bundleName = bundleName.substring(0, index) + ".";
aoqi@0:         bundleName = bundleName + "resources." + bundle;
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Get a message localized to the specified locale, using the message ID
aoqi@0:      * and package name if no message is available.  The locale is normally
aoqi@0:      * that of the client of a service, chosen with knowledge that both the
aoqi@0:      * client and this server support that locale.  There are two error
aoqi@0:      * cases:  first, when the specified locale is unsupported or null, the
aoqi@0:      * default locale is used if possible; second, when no bundle supports
aoqi@0:      * that locale, the message ID and package name are used.
aoqi@0:      *
aoqi@0:      * @param locale    The locale of the message to use.  If this is null,
aoqi@0:      *                  the default locale will be used.
aoqi@0:      * @param messageId The ID of the message to use.
aoqi@0:      * @return The message, localized as described above.
aoqi@0:      */
aoqi@0:     public String getMessage(Locale locale,
aoqi@0:                              String messageId) {
aoqi@0:         ResourceBundle bundle;
aoqi@0: 
aoqi@0:         // cope with unsupported locale...
aoqi@0:         if (locale == null)
aoqi@0:             locale = Locale.getDefault();
aoqi@0: 
aoqi@0:         try {
aoqi@0:             bundle = ResourceBundle.getBundle(bundleName, locale);
aoqi@0:         } catch (MissingResourceException e) {
aoqi@0:             bundle = ResourceBundle.getBundle(bundleName, Locale.ENGLISH);
aoqi@0:         }
aoqi@0:         return bundle.getString(messageId);
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Format a message localized to the specified locale, using the message
aoqi@0:      * ID with its package name if none is available.  The locale is normally
aoqi@0:      * the client of a service, chosen with knowledge that both the client
aoqi@0:      * server support that locale.  There are two error cases:  first, if the
aoqi@0:      * specified locale is unsupported or null, the default locale is used if
aoqi@0:      * possible; second, when no bundle supports that locale, the message ID
aoqi@0:      * and package name are used.
aoqi@0:      *
aoqi@0:      * @param locale     The locale of the message to use.  If this is null,
aoqi@0:      *                   the default locale will be used.
aoqi@0:      * @param messageId  The ID of the message format to use.
aoqi@0:      * @param parameters Used when formatting the message.  Objects in
aoqi@0:      *                   this list are turned to strings if they are not Strings, Numbers,
aoqi@0:      *                   or Dates (that is, if MessageFormat would treat them as errors).
aoqi@0:      * @return The message, localized as described above.
aoqi@0:      * @see java.text.MessageFormat
aoqi@0:      */
aoqi@0:     public String getMessage(Locale locale,
aoqi@0:                              String messageId,
aoqi@0:                              Object parameters []) {
aoqi@0:         if (parameters == null)
aoqi@0:             return getMessage(locale, messageId);
aoqi@0: 
aoqi@0:         // since most messages won't be tested (sigh), be friendly to
aoqi@0:         // the inevitable developer errors of passing random data types
aoqi@0:         // to the message formatting code.
aoqi@0:         for (int i = 0; i < parameters.length; i++) {
aoqi@0:             if (!(parameters[i] instanceof String)
aoqi@0:                     && !(parameters[i] instanceof Number)
aoqi@0:                     && !(parameters[i] instanceof java.util.Date)) {
aoqi@0:                 if (parameters[i] == null)
aoqi@0:                     parameters[i] = "(null)";
aoqi@0:                 else
aoqi@0:                     parameters[i] = parameters[i].toString();
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         // similarly, cope with unsupported locale...
aoqi@0:         if (locale == null)
aoqi@0:             locale = Locale.getDefault();
aoqi@0: 
aoqi@0:         // get the appropriately localized MessageFormat object
aoqi@0:         ResourceBundle bundle;
aoqi@0:         MessageFormat format;
aoqi@0: 
aoqi@0:         try {
aoqi@0:             bundle = ResourceBundle.getBundle(bundleName, locale);
aoqi@0:         } catch (MissingResourceException e) {
aoqi@0:             bundle = ResourceBundle.getBundle(bundleName, Locale.ENGLISH);
aoqi@0:             /*String retval;
aoqi@0: 
aoqi@0:             retval = packagePrefix (messageId);
aoqi@0:             for (int i = 0; i < parameters.length; i++) {
aoqi@0:             retval += ' ';
aoqi@0:             retval += parameters [i];
aoqi@0:             }
aoqi@0:             return retval;*/
aoqi@0:         }
aoqi@0:         format = new MessageFormat(bundle.getString(messageId));
aoqi@0:         format.setLocale(locale);
aoqi@0: 
aoqi@0:         // return the formatted message
aoqi@0:         StringBuffer result = new StringBuffer();
aoqi@0: 
aoqi@0:         result = format.format(parameters, result, new FieldPosition(0));
aoqi@0:         return result.toString();
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Chooses a client locale to use, using the first language specified in
aoqi@0:      * the list that is supported by this catalog.  If none of the specified
aoqi@0:      * languages is supported, a null value is returned.  Such a list of
aoqi@0:      * languages might be provided in an HTTP/1.1 "Accept-Language" header
aoqi@0:      * field, or through some other content negotiation mechanism.
aoqi@0:      * <p/>
aoqi@0:      * <P> The language specifiers recognized are RFC 1766 style ("fr" for
aoqi@0:      * all French, "fr-ca" for Canadian French), although only the strict
aoqi@0:      * ISO subset (two letter language and country specifiers) is currently
aoqi@0:      * supported.  Java-style locale strings ("fr_CA") are also supported.
aoqi@0:      *
aoqi@0:      * @param languages Array of language specifiers, ordered with the most
aoqi@0:      *                  preferable one at the front.  For example, "en-ca" then "fr-ca",
aoqi@0:      *                  followed by "zh_CN".
aoqi@0:      * @return The most preferable supported locale, or null.
aoqi@0:      * @see java.util.Locale
aoqi@0:      */
aoqi@0:     public Locale chooseLocale(String languages []) {
aoqi@0:         if ((languages = canonicalize(languages)) != null) {
aoqi@0:             for (int i = 0; i < languages.length; i++)
aoqi@0:                 if (isLocaleSupported(languages[i]))
aoqi@0:                     return getLocale(languages[i]);
aoqi@0:         }
aoqi@0:         return null;
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0:     //
aoqi@0:     // Canonicalizes the RFC 1766 style language strings ("en-in") to
aoqi@0:     // match standard Java usage ("en_IN"), removing strings that don't
aoqi@0:     // use two character ISO language and country codes.   Avoids all
aoqi@0:     // memory allocations possible, so that if the strings passed in are
aoqi@0:     // just lowercase ISO codes (a common case) the input is returned.
aoqi@0:     //
aoqi@0:     private String[] canonicalize(String languages []) {
aoqi@0:         boolean didClone = false;
aoqi@0:         int trimCount = 0;
aoqi@0: 
aoqi@0:         if (languages == null)
aoqi@0:             return languages;
aoqi@0: 
aoqi@0:         for (int i = 0; i < languages.length; i++) {
aoqi@0:             String lang = languages[i];
aoqi@0:             int len = lang.length();
aoqi@0: 
aoqi@0:             // no RFC1766 extensions allowed; "zh" and "zh-tw" (etc) are OK
aoqi@0:             // as are regular locale names with no variant ("de_CH").
aoqi@0:             if (!(len == 2 || len == 5)) {
aoqi@0:                 if (!didClone) {
aoqi@0:                     languages = (String[]) languages.clone();
aoqi@0:                     didClone = true;
aoqi@0:                 }
aoqi@0:                 languages[i] = null;
aoqi@0:                 trimCount++;
aoqi@0:                 continue;
aoqi@0:             }
aoqi@0: 
aoqi@0:             // language code ... if already lowercase, we change nothing
aoqi@0:             if (len == 2) {
aoqi@0:                 lang = lang.toLowerCase();
aoqi@0:                 if (lang != languages[i]) {
aoqi@0:                     if (!didClone) {
aoqi@0:                         languages = (String[]) languages.clone();
aoqi@0:                         didClone = true;
aoqi@0:                     }
aoqi@0:                     languages[i] = lang;
aoqi@0:                 }
aoqi@0:                 continue;
aoqi@0:             }
aoqi@0: 
aoqi@0:             // language_country ... fixup case, force "_"
aoqi@0:             char buf [] = new char[5];
aoqi@0: 
aoqi@0:             buf[0] = Character.toLowerCase(lang.charAt(0));
aoqi@0:             buf[1] = Character.toLowerCase(lang.charAt(1));
aoqi@0:             buf[2] = '_';
aoqi@0:             buf[3] = Character.toUpperCase(lang.charAt(3));
aoqi@0:             buf[4] = Character.toUpperCase(lang.charAt(4));
aoqi@0:             if (!didClone) {
aoqi@0:                 languages = (String[]) languages.clone();
aoqi@0:                 didClone = true;
aoqi@0:             }
aoqi@0:             languages[i] = new String(buf);
aoqi@0:         }
aoqi@0: 
aoqi@0:         // purge any shadows of deleted RFC1766 extended language codes
aoqi@0:         if (trimCount != 0) {
aoqi@0:             String temp [] = new String[languages.length - trimCount];
aoqi@0:             int i;
aoqi@0: 
aoqi@0:             for (i = 0, trimCount = 0; i < temp.length; i++) {
aoqi@0:                 while (languages[i + trimCount] == null)
aoqi@0:                     trimCount++;
aoqi@0:                 temp[i] = languages[i + trimCount];
aoqi@0:             }
aoqi@0:             languages = temp;
aoqi@0:         }
aoqi@0:         return languages;
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0:     //
aoqi@0:     // Returns a locale object supporting the specified locale, using
aoqi@0:     // a small cache to speed up some common languages and reduce the
aoqi@0:     // needless allocation of memory.
aoqi@0:     //
aoqi@0:     private Locale getLocale(String localeName) {
aoqi@0:         String language, country;
aoqi@0:         int index;
aoqi@0: 
aoqi@0:         index = localeName.indexOf('_');
aoqi@0:         if (index == -1) {
aoqi@0:             //
aoqi@0:             // Special case the builtin JDK languages
aoqi@0:             //
aoqi@0:             if (localeName.equals("de"))
aoqi@0:                 return Locale.GERMAN;
aoqi@0:             if (localeName.equals("en"))
aoqi@0:                 return Locale.ENGLISH;
aoqi@0:             if (localeName.equals("fr"))
aoqi@0:                 return Locale.FRENCH;
aoqi@0:             if (localeName.equals("it"))
aoqi@0:                 return Locale.ITALIAN;
aoqi@0:             if (localeName.equals("ja"))
aoqi@0:                 return Locale.JAPANESE;
aoqi@0:             if (localeName.equals("ko"))
aoqi@0:                 return Locale.KOREAN;
aoqi@0:             if (localeName.equals("zh"))
aoqi@0:                 return Locale.CHINESE;
aoqi@0: 
aoqi@0:             language = localeName;
aoqi@0:             country = "";
aoqi@0:         } else {
aoqi@0:             if (localeName.equals("zh_CN"))
aoqi@0:                 return Locale.SIMPLIFIED_CHINESE;
aoqi@0:             if (localeName.equals("zh_TW"))
aoqi@0:                 return Locale.TRADITIONAL_CHINESE;
aoqi@0: 
aoqi@0:             //
aoqi@0:             // JDK also has constants for countries:  en_GB, en_US, en_CA,
aoqi@0:             // fr_FR, fr_CA, de_DE, ja_JP, ko_KR.  We don't use those.
aoqi@0:             //
aoqi@0:             language = localeName.substring(0, index);
aoqi@0:             country = localeName.substring(index + 1);
aoqi@0:         }
aoqi@0: 
aoqi@0:         return new Locale(language, country);
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0:     //
aoqi@0:     // cache for isLanguageSupported(), below ... key is a language
aoqi@0:     // or locale name, value is a Boolean
aoqi@0:     //
aoqi@0:     private Hashtable cache = new Hashtable(5);
aoqi@0: 
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Returns true iff the specified locale has explicit language support.
aoqi@0:      * For example, the traditional Chinese locale "zh_TW" has such support
aoqi@0:      * if there are message bundles suffixed with either "zh_TW" or "zh".
aoqi@0:      * <p/>
aoqi@0:      * <P> This method is used to bypass part of the search path mechanism
aoqi@0:      * of the <code>ResourceBundle</code> class, specifically the parts which
aoqi@0:      * force use of default locales and bundles.  Such bypassing is required
aoqi@0:      * in order to enable use of a client's preferred languages.  Following
aoqi@0:      * the above example, if a client prefers "zh_TW" but can also accept
aoqi@0:      * "ja", this method would be used to detect that there are no "zh_TW"
aoqi@0:      * resource bundles and hence that "ja" messages should be used.  This
aoqi@0:      * bypasses the ResourceBundle mechanism which will return messages in
aoqi@0:      * some other locale (picking some hard-to-anticipate default) instead
aoqi@0:      * of reporting an error and letting the client choose another locale.
aoqi@0:      *
aoqi@0:      * @param localeName A standard Java locale name, using two character
aoqi@0:      *                   language codes optionally suffixed by country codes.
aoqi@0:      * @return True iff the language of that locale is supported.
aoqi@0:      * @see java.util.Locale
aoqi@0:      */
aoqi@0:     public boolean isLocaleSupported(String localeName) {
aoqi@0:         //
aoqi@0:         // Use previous results if possible.  We expect that the codebase
aoqi@0:         // is immutable, so we never worry about changing the cache.
aoqi@0:         //
aoqi@0:         Boolean value = (Boolean) cache.get(localeName);
aoqi@0: 
aoqi@0:         if (value != null)
aoqi@0:             return value.booleanValue();
aoqi@0: 
aoqi@0:         //
aoqi@0:         // Try "language_country_variant", then "language_country",
aoqi@0:         // then finally "language" ... assuming the longest locale name
aoqi@0:         // is passed.  If not, we'll try fewer options.
aoqi@0:         //
aoqi@0:         ClassLoader loader = null;
aoqi@0: 
aoqi@0:         for (; ;) {
aoqi@0:             String name = bundleName + "_" + localeName;
aoqi@0: 
aoqi@0:             // look up classes ...
aoqi@0:             try {
aoqi@0:                 Class.forName(name);
aoqi@0:                 cache.put(localeName, Boolean.TRUE);
aoqi@0:                 return true;
aoqi@0:             } catch (Exception e) {
aoqi@0:             }
aoqi@0: 
aoqi@0:             // ... then property files (only for ISO Latin/1 messages)
aoqi@0:             InputStream in;
aoqi@0: 
aoqi@0:             if (loader == null)
aoqi@0:                 loader = getClass().getClassLoader();
aoqi@0: 
aoqi@0:             name = name.replace('.', '/');
aoqi@0:             name = name + ".properties";
aoqi@0:             if (loader == null)
aoqi@0:                 in = ClassLoader.getSystemResourceAsStream(name);
aoqi@0:             else
aoqi@0:                 in = loader.getResourceAsStream(name);
aoqi@0:             if (in != null) {
aoqi@0:                 cache.put(localeName, Boolean.TRUE);
aoqi@0:                 return true;
aoqi@0:             }
aoqi@0: 
aoqi@0:             int index = localeName.indexOf('_');
aoqi@0: 
aoqi@0:             if (index > 0)
aoqi@0:                 localeName = localeName.substring(0, index);
aoqi@0:             else
aoqi@0:                 break;
aoqi@0:         }
aoqi@0: 
aoqi@0:         //
aoqi@0:         // If we got this far, we failed.  Remember for later.
aoqi@0:         //
aoqi@0:         cache.put(localeName, Boolean.FALSE);
aoqi@0:         return false;
aoqi@0:     }
aoqi@0: }