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/*
* #%L
* I18n :: Api
*
* $Id$
* $HeadURL$
* %%
* Copyright (C) 2004 - 2010 CodeLutin
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
package org.nuiton.i18n;
import org.apache.commons.collections4.MapUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.nuiton.i18n.bundle.I18nBundle;
import org.nuiton.i18n.bundle.I18nBundleEntry;
import org.nuiton.i18n.bundle.I18nBundleUtil;
import org.nuiton.i18n.init.I18nInitializer;
import java.util.Collection;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
/**
* Represents the store of languages of the i18n system.
*
* Replace the {@code org.nuiton.i18n.I18nLoader} class from project
* http://maven-site.nuiton.org/nuiton-utils
*
* @author Tony Chemit - [email protected]
* @since 1.1
*/
public class I18nStore {
/** Logger. */
private static final Log log = LogFactory.getLog(I18nStore.class);
/** le language actuellement utilise */
protected I18nLanguage language;
/** le cache de languages deja charges */
protected Map languages;
/** le cache de bundles deja charges */
protected I18nBundle[] bundles;
/** la locale par defaut a utiliser. */
protected Locale defaultLocale;
/** le resolver de bundles */
protected I18nInitializer resolver;
/**
* @param defaultLocale default locale
* @param resolver resolver of bundles
*/
public I18nStore(Locale defaultLocale, I18nInitializer resolver) {
this.defaultLocale = defaultLocale == null ? Locale.getDefault() : defaultLocale;
this.resolver = resolver;
}
/**
* Obtain the current language setted in the store.
*
* This language is used for all translations without locale information
* (says the method {@link I18n#t(String, Object...)}).
*
* @return the current language or {@code null} if none is defined
* @since 2.1
*/
public I18nLanguage getCurrentLanguage() {
return language;
}
/**
* Obtain the current locale setted in the store.
*
* This locale is coming from the current language and is used for all
* translations without locale information (says the method {@link I18n#t(String, Object...)}.
*
* @return the current locale or {@code null} if no current language is setted
* @since 2.1
*/
public Locale getCurrentLocale() {
return language == null ? null : language.getLocale();
}
/**
* Sets the current locale for the store.
*
* This will set the current language with this given locale.
*
* @param locale the new current locale
* @since 2.1
*/
public void setCurrentLocale(Locale locale) {
Locale currentLocale = getCurrentLocale();
if (locale.equals(currentLocale)) {
// nothing to do, alreayd using this locale
return;
}
// set the new current language
init();
if (log.isDebugEnabled()) {
log.debug("locale: " + locale);
}
I18nLanguage result = getLanguage(locale);
language = result;
//TC-20090702 the selected language is the default locale, usefull for
// objects dealing with the default locale (swing widgets,...)
Locale.setDefault(locale);
}
/**
* @return current language loaded or null, if no language was load.
* @deprecated since 2.1, will be removed in version 3.0, prefer use now
* the method {@link #getCurrentLanguage()}.
*/
@Deprecated
public I18nLanguage getLanguage() {
return language;
}
/** @return le cache de language actuellement pris en charge. */
public I18nLanguage[] getLanguages() {
Collection values = getLanguagesCache().values();
return values.toArray(new I18nLanguage[values.size()]);
}
/** @return the default locale of the store */
public Locale getDefaultLocale() {
return defaultLocale;
}
public boolean isEmpty() {
boolean isEmpty = I18nBundleUtil.isEmpty(getBundles());
return isEmpty;
}
/** @return array of all locales loaded */
public Locale[] getLocales() {
Locale[] result = I18nBundleUtil.getLocales(getBundles());
return result;
}
public I18nBundle[] getBundles() {
checkInit();
return bundles;
}
public I18nBundle[] getBundles(Locale l) {
I18nBundle[] result = I18nBundleUtil.getBundles(l, getBundles());
return result;
}
public I18nBundleEntry[] getBundleEntries() {
I18nBundleEntry[] result = I18nBundleUtil.getBundleEntries(getBundles());
return result;
}
public I18nBundleEntry[] getBundleEntries(Locale l) {
I18nBundleEntry[] result =
I18nBundleUtil.getBundleEntries(l, getDefaultLocale(),
getBundles());
return result;
}
protected void init() {
if (isInit()) {
// already init
return;
}
if (resolver == null) {
throw new NullPointerException(
"resolver can not be null in " +
"org.nuiton.i18n.I18nStore.init method");
}
try {
bundles = resolver.resolvBundles();
} catch (Exception e) {
throw new RuntimeException(
"Could not init store for reason " + e.getMessage(), e);
}
if (log.isInfoEnabled()) {
log.info(bundles.length + " bundle(s) found, [" +
getBundleEntries().length + " file(s)].");
}
}
/**
* Set a new language in store, given a locale.
*
* @param locale la locale du language requis
* @deprecated since 2.1, will be removed in version 3.0, use now the
* method {@link #setCurrentLocale(Locale)}.
*/
@Deprecated
protected void setLanguage(Locale locale) {
init();
if (log.isDebugEnabled()) {
log.debug("locale: " + locale);
}
I18nLanguage result = getLanguage(locale);
language = result;
//TC-20090702 the selected language is the default locale, usefull for
// objects dealing with the default locale (swing widgets,...)
Locale.setDefault(locale);
}
/**
* Close store and release cache ofg language.
*
* Current language will be also cleaned.
*/
protected void close() {
if (languages != null) {
if (log.isInfoEnabled()) {
log.info("will close " + languages.size() + " language(s).");
}
for (I18nLanguage l : languages.values()) {
l.close();
}
languages.clear();
languages = null;
}
if (bundles != null) {
bundles = null;
}
language = null;
}
/** @return le cache de language avec instanciation paresseuse */
protected Map getLanguagesCache() {
if (languages == null) {
languages = new HashMap();
}
return languages;
}
/**
* Recherche un object de type {@link I18nLanguage} pour la locale donnée
* en paramètre dans le cache des langues chargées ({@link #languages}).
*
* Si un tel objet n'existe pas, alors on en crée un et on le place dans le
* cache.
*
* @param locale la locale du language recherche
* @return le language trouve dans le cache.
*/
protected I18nLanguage getLanguage(Locale locale) {
I18nLanguage result = null;
if (MapUtils.isNotEmpty(languages)) {
// take the already registred language
result = languages.get(locale);
}
if (result == null) {
// add a new language for the given locale
result = addLanguage(locale);
} else {
if (log.isDebugEnabled()) {
log.debug("using cached language : " + result);
}
}
return result;
}
protected I18nLanguage addLanguage(Locale locale) {
if (!isInit()) {
// always init the store
init();
}
I18nLanguage result;
result = new I18nLanguage(locale, resolver.isMissingKeyReturnNull());
I18nBundleEntry[] entries = getBundleEntries(locale);
result.load(entries, resolver.getEncoding());
if (log.isInfoEnabled()) {
log.info(result + ", nbEntries: " + entries.length +
", nbSentences: " + result.size() + ".");
}
getLanguagesCache().put(locale, result);
return result;
}
protected boolean isInit() {
return bundles != null;
}
protected void checkInit() {
if (!isInit()) {
throw new IllegalStateException(
"should call init method on " + I18nStore.class);
}
}
public I18nInitializer getResolver() {
return resolver;
}
}
