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Diffstat (limited to 'libjava/classpath/gnu/java/locale/LocaleHelper.java')
| -rw-r--r-- | libjava/classpath/gnu/java/locale/LocaleHelper.java | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/locale/LocaleHelper.java b/libjava/classpath/gnu/java/locale/LocaleHelper.java new file mode 100644 index 00000000000..ff00293907b --- /dev/null +++ b/libjava/classpath/gnu/java/locale/LocaleHelper.java @@ -0,0 +1,158 @@ +/* LocaleHelper.java -- helper routines for localization + Copyright (C) 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.locale; + +import java.util.Locale; +import java.util.MissingResourceException; +import java.util.ResourceBundle; + +/** + * This class provides common helper methods + * for handling localized data. + * + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * + * @see java.util.Locale + * @see java.util.ResourceBundle + */ +public class LocaleHelper +{ + /** + * This method is used by the localized name lookup methods to retrieve + * the localized name of a particular piece of locale data. + * If the display name can not be localized to the supplied + * locale, it will fall back on other output in the following order: + * + * <ul> + * <li>the localized name in the default locale</li> + * <li>the localized name in English (optional)</li> + * <li>the localized name in the root locale bundle (optional)</li> + * <li>the localized input string</li> + * </ul> + * <p> + * If the supplied key is merely the empty string, then the empty string is + * returned. + * </p> + * + * @param inLocale the locale to use for formatting the display string. + * @param key the locale data used as a key to the localized lookup tables. + * @param name the name of the hashtable containing the localized data. + * @param checkEnglish true if the method should fall back on data + * from the English locale. + * @param checkRoot true if the method should fall back on data from the + * unlocalized root locale. + * @return a <code>String</code>, hopefully containing the localized + * variant of the input data. + * @throws NullPointerException if <code>inLocale</code> is null. + */ + public static String getLocalizedString(Locale inLocale, String key, + String name, boolean checkEnglish, + boolean checkRoot) + { + String localizedString; + String property; + + if (key.equals("")) + return ""; + property = name + "." + key; + /* Localize to inLocale */ + try + { + localizedString = + ResourceBundle.getBundle("gnu.java.locale.LocaleInformation", + inLocale).getString(property); + } + catch (MissingResourceException exception) + { + localizedString = null; + } + /* Localize to default locale */ + if (localizedString == null) + { + try + { + ResourceBundle bundle; + + bundle = + ResourceBundle.getBundle("gnu.java.locale.LocaleInformation"); + localizedString = bundle.getString(property); + } + catch (MissingResourceException exception) + { + localizedString = null; + } + } + /* Localize to English */ + if (localizedString == null && checkEnglish) + { + try + { + localizedString = + ResourceBundle.getBundle("gnu.java.locale.LocaleInformation", + Locale.ENGLISH).getString(property); + } + catch (MissingResourceException exception) + { + localizedString = null; + } + } + /* Return unlocalized version */ + if (localizedString == null && checkRoot) + { + try + { + localizedString = + ResourceBundle.getBundle("gnu.java.locale.LocaleInformation", + new Locale("","","") + ).getString(property); + } + catch (MissingResourceException exception) + { + localizedString = null; + } + } + /* Return original input string */ + if (localizedString == null) + { + localizedString = key; + } + return localizedString; + } +} + |