158 lines
5 KiB
Java
158 lines
5 KiB
Java
/* LocaleHelper.java -- helper routines for localization
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Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.locale;
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import java.util.Locale;
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import java.util.MissingResourceException;
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import java.util.ResourceBundle;
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/**
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* This class provides common helper methods
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* for handling localized data.
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*
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* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
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*
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* @see java.util.Locale
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* @see java.util.ResourceBundle
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*/
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public class LocaleHelper
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{
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/**
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* This method is used by the localized name lookup methods to retrieve
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* the localized name of a particular piece of locale data.
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* If the display name can not be localized to the supplied
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* locale, it will fall back on other output in the following order:
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*
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* <ul>
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* <li>the localized name in the default locale</li>
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* <li>the localized name in English (optional)</li>
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* <li>the localized name in the root locale bundle (optional)</li>
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* <li>the localized input string</li>
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* </ul>
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* <p>
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* If the supplied key is merely the empty string, then the empty string is
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* returned.
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* </p>
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*
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* @param inLocale the locale to use for formatting the display string.
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* @param key the locale data used as a key to the localized lookup tables.
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* @param name the name of the hashtable containing the localized data.
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* @param checkEnglish true if the method should fall back on data
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* from the English locale.
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* @param checkRoot true if the method should fall back on data from the
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* unlocalized root locale.
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* @return a <code>String</code>, hopefully containing the localized
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* variant of the input data.
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* @throws NullPointerException if <code>inLocale</code> is null.
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*/
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public static String getLocalizedString(Locale inLocale, String key,
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String name, boolean checkEnglish,
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boolean checkRoot)
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{
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String localizedString;
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String property;
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if (key.equals(""))
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return "";
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property = name + "." + key;
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/* Localize to inLocale */
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try
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{
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localizedString =
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ResourceBundle.getBundle("gnu.java.locale.LocaleInformation",
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inLocale).getString(property);
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}
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catch (MissingResourceException exception)
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{
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localizedString = null;
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}
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/* Localize to default locale */
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if (localizedString == null)
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{
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try
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{
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ResourceBundle bundle;
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bundle =
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ResourceBundle.getBundle("gnu.java.locale.LocaleInformation");
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localizedString = bundle.getString(property);
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}
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catch (MissingResourceException exception)
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{
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localizedString = null;
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}
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}
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/* Localize to English */
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if (localizedString == null && checkEnglish)
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{
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try
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{
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localizedString =
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ResourceBundle.getBundle("gnu.java.locale.LocaleInformation",
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Locale.ENGLISH).getString(property);
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}
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catch (MissingResourceException exception)
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{
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localizedString = null;
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}
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}
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/* Return unlocalized version */
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if (localizedString == null && checkRoot)
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{
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try
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{
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localizedString =
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ResourceBundle.getBundle("gnu.java.locale.LocaleInformation",
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new Locale("","","")
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).getString(property);
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}
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catch (MissingResourceException exception)
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{
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localizedString = null;
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}
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}
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/* Return original input string */
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if (localizedString == null)
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{
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localizedString = key;
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}
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return localizedString;
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}
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}
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