2 * Copyright (C) 2016, 2017 Roland Häder
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU Affero General Public License as
6 * published by the Free Software Foundation, either version 3 of the
7 * License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU Affero General Public License for more details.
14 * You should have received a copy of the GNU Affero General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 package org.mxchange.jjobs.beans.localization;
19 import java.text.MessageFormat;
20 import java.text.NumberFormat;
21 import java.util.Iterator;
22 import java.util.LinkedHashMap;
23 import java.util.Locale;
25 import java.util.Objects;
26 import javax.annotation.PostConstruct;
27 import javax.enterprise.context.SessionScoped;
28 import javax.enterprise.event.Event;
29 import javax.enterprise.event.Observes;
30 import javax.enterprise.inject.Any;
31 import javax.faces.context.FacesContext;
32 import javax.inject.Inject;
33 import javax.inject.Named;
34 import org.mxchange.jcoreee.events.locale.LocaleChangeEvent;
35 import org.mxchange.jcoreee.events.locale.ObservableLocaleChangeEvent;
36 import org.mxchange.jjobs.beans.BaseJobsBean;
37 import org.mxchange.juserlogincore.events.login.ObservableUserLoggedInEvent;
38 import org.mxchange.juserlogincore.events.logout.ObservableUserLogoutEvent;
41 * A session-scoped bean for handling localization/internationalization changes.
42 * This class is based on an example at [1] from mkyong.
44 * 1: http://www.mkyong.com/jsf2/jsf-2-internationalization-example/
46 * @author Roland Häder<roland@mxchange.org>
48 @Named ("localizationController")
50 public class JobsLocalizationSessionBean extends BaseJobsBean implements JobsLocalizationSessionController {
55 private static NumberFormat NUMBER_FORMAT;
60 private static final long serialVersionUID = 158_768_216_759_107L;
65 private Locale locale;
68 * Event being fired when a locale has changed successfully
72 private Event<ObservableLocaleChangeEvent> localeChangeEvent;
75 * Locale code (example: de for Germany)
77 private String localeCode;
80 * A map of all supported locales, using language code as key
82 private final Map<String, Locale> supportedLocales;
87 public JobsLocalizationSessionBean () {
88 // Call super constructor
92 this.supportedLocales = new LinkedHashMap<>(2);
96 * Event observer for logged-in user
98 * @param event Event instance
100 public void afterUserLoginEvent (@Observes final ObservableUserLoggedInEvent event) {
101 // event should not be null
104 throw new NullPointerException("event is null"); //NOI18N
105 } else if (event.getLoggedInUser() == null) {
107 throw new NullPointerException("event.loggedInUser is null"); //NOI18N
108 } else if (event.getLoggedInUser().getUserId() == null) {
110 throw new NullPointerException("event.loggedInUser.userId is null"); //NOI18N
111 } else if (event.getLoggedInUser().getUserId() < 1) {
113 throw new IllegalArgumentException(MessageFormat.format("userId of user={0} is not valid: {1}", event.getLoggedInUser(), event.getLoggedInUser().getUserId())); //NOI18N
116 // Is the locale set?
117 if (event.getLoggedInUser().getUserLocale() instanceof Locale) {
119 final Locale userLocale = event.getLoggedInUser().getUserLocale();
122 this.changeLocale(userLocale, Boolean.TRUE);
127 * Event observer for logged-out user
129 * @param event Event instance
131 public void afterUserLogoutEvent (@Observes final ObservableUserLogoutEvent event) {
132 // event should not be null
135 throw new NullPointerException("event is null"); //NOI18N
136 } else if (event.getLoggedOutUser() == null) {
138 throw new NullPointerException("event.loggedOutUser is null"); //NOI18N
139 } else if (event.getLoggedOutUser().getUserId() == null) {
141 throw new NullPointerException("event.loggedOutUser.userId is null"); //NOI18N
142 } else if (event.getLoggedOutUser().getUserId() < 1) {
144 throw new IllegalArgumentException(MessageFormat.format("userId of user={0} is not valid: {1}", event.getLoggedOutUser(), event.getLoggedOutUser().getUserId())); //NOI18N
147 // Clear this bean as well
152 * Changes locale in application
154 public void doChangeLocale () {
155 // Is locale code set?
156 if (this.getLocaleCode() == null) {
158 throw new NullPointerException("this.localeCode is null"); //NOI18N
159 } else if (this.getLocaleCode().isEmpty()) {
161 throw new IllegalArgumentException("this.localeCode is empty"); //NOI18N
164 // Default new locale is null, will be handled later
165 Locale newLocale = null;
167 // Iterate over whole map
168 for (final Map.Entry<String, Locale> entry : this.getSupportedLocales().entrySet()) {
169 final Locale foundLocale = entry.getValue();
171 // Does the language match?
172 if (Objects.equals(foundLocale.toString(), this.getLocaleCode())) {
173 // Is found, take it as request locale
174 newLocale = foundLocale;
179 // Clear locale code field
182 // Has a matching locale
183 if (null == newLocale) {
185 throw new NullPointerException("this.localeCode=" + this.getLocaleCode() + " cannot be found."); //NOI18N
189 this.changeLocale(newLocale, Boolean.TRUE);
192 NUMBER_FORMAT = NumberFormat.getNumberInstance(newLocale);
196 public String formatCurrency (final Float amount) {
198 return NUMBER_FORMAT.format(amount);
206 public Locale getLocale () {
213 * @param locale Locale
215 public void setLocale (final Locale locale) {
216 this.locale = locale;
220 * Getter for localeCode code
222 * @return Language code
224 public String getLocaleCode () {
225 return this.localeCode;
229 * Setter for localeCode code
231 * @param localeCode Language code
233 public void setLocaleCode (final String localeCode) {
234 this.localeCode = localeCode;
238 * Getter for selectable localizations
240 * @return Selectable localizations
242 @SuppressWarnings ("ReturnOfCollectionOrArrayField")
243 public Map<String, Locale> getSupportedLocales () {
245 return this.supportedLocales;
249 * Initializer for this bean
252 public void init () {
253 // Get default locale
254 final Locale defaultLocale = FacesContext.getCurrentInstance().getApplication().getDefaultLocale();
257 this.getSupportedLocales().put(defaultLocale.toString(), defaultLocale);
259 // Get iterator from faces context
260 final Iterator<Locale> iterator = FacesContext.getCurrentInstance().getApplication().getSupportedLocales();
263 while (iterator.hasNext()) {
265 Locale supportedLocale = iterator.next();
268 this.getSupportedLocales().put(supportedLocale.toString(), supportedLocale);
271 // Get locale instance from request (e.g. browser)
272 Locale requestLocale = FacesContext.getCurrentInstance().getExternalContext().getRequestLocale();
274 // Is no country code found?
275 if (requestLocale.getCountry().isEmpty()) {
276 // Then try to find one, get language from it
277 final String language = requestLocale.getLanguage();
278 Boolean found = Boolean.FALSE;
280 // Iterate over whole map
281 for (final Map.Entry<String, Locale> entry : this.getSupportedLocales().entrySet()) {
282 final String languageCode = entry.getKey();
283 final Locale foundLocale = entry.getValue();
285 // Does the language match?
286 if (languageCode.startsWith(language)) {
287 // Is found, take it as request locale
288 requestLocale = foundLocale;
289 found = Boolean.TRUE;
296 // Then set default locale
297 requestLocale = defaultLocale;
301 // Change locale, may set same back in faces context, but triggers event
302 this.changeLocale(requestLocale, Boolean.FALSE);
304 // Initial formatting, may change when user chooses other locale
305 NUMBER_FORMAT = NumberFormat.getNumberInstance(this.locale);
309 * Changes current locale in this controller and faces context to given.
310 * This method makes sure that locales with at least language and country
311 * information are being changed to.
313 * @param locale New locale to set
314 * @param notifyBeans Whether to notify other beans
316 private void changeLocale (final Locale locale, final Boolean notifyBeans) {
317 // Is the locale language_country at least?
318 if (null == locale) {
320 throw new NullPointerException("locale is null"); //NOI18N
321 } else if (!locale.toString().contains("_")) { //NOI18N
323 throw new IllegalArgumentException(MessageFormat.format("locale={0} does not have country information set.", locale)); //NOI18N
326 // Set locale + code here
327 this.setLocale(locale);
328 this.setLocaleCode(locale.toString());
330 // Inform faces context
331 FacesContext.getCurrentInstance().getViewRoot().setLocale(locale);
333 // Notify other beans?
336 this.localeChangeEvent.fire(new LocaleChangeEvent(locale));
343 private void clear () {
345 this.setLocaleCode(null);
346 this.setLocale(null);