/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.richfaces.application;
import java.text.MessageFormat;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
import javax.faces.application.FacesMessage;
import javax.faces.application.FacesMessage.Severity;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;
import org.richfaces.l10n.BundleLoader;
import org.richfaces.l10n.MessageBundle;
import com.google.common.base.Strings;
/**
* @author Nick Belaevski
*
*/
public class MessageFactoryImpl implements MessageFactory {
protected interface Factory<T> {
T create(ResourceBundle bundle, Enum<?> messageKey, Object... args) throws MissingResourceException;
}
private static final Factory<FacesMessage> MESSAGE_FACTORY = new Factory<FacesMessage>() {
public FacesMessage create(ResourceBundle bundle, Enum<?> messageKey, Object... args) throws MissingResourceException {
String messageId = messageKey.toString();
String summary = null;
String detail = null;
try {
summary = bundle.getString(messageId);
detail = bundle.getString(messageId + "_detail");
} catch (MissingResourceException e) {
// do nothing
}
if (summary != null) {
String formattedSummary = MessageFormat.format(summary, args);
String formattedDetail = null;
if (detail != null) {
formattedDetail = MessageFormat.format(detail, args);
}
return new FacesMessage(formattedSummary, formattedDetail);
}
return null;
}
};
private static final Factory<String> LABEL_FACTORY = new Factory<String>() {
public String create(ResourceBundle bundle, Enum<?> messageKey, Object... args) throws MissingResourceException {
String pattern = bundle.getString(messageKey.toString());
return MessageFormat.format(pattern, args);
}
};
private static final Factory<String> FORMAT_FACTORY = new Factory<String>() {
public String create(ResourceBundle bundle, Enum<?> messageKey, Object... args) throws MissingResourceException {
String format = bundle.getString(messageKey.toString());
return format;
}
};
private BundleLoader bundleLoader;
public MessageFactoryImpl(BundleLoader bundleLoader) {
super();
this.bundleLoader = bundleLoader;
}
private Locale detectLocale(FacesContext context) {
UIViewRoot viewRoot = context.getViewRoot();
if (viewRoot != null && viewRoot.getLocale() != null) {
return viewRoot.getLocale();
}
return null;
}
public FacesMessage createMessage(FacesContext facesContext, Enum<?> messageKey, Object... args) {
return createMessage(facesContext, FacesMessage.SEVERITY_INFO, messageKey, args);
}
public FacesMessage createMessage(FacesContext facesContext, Severity severity, Enum<?> messageKey, Object... args) {
if (facesContext == null) {
throw new NullPointerException("context");
}
if (severity == null) {
throw new NullPointerException("severity");
}
if (messageKey == null) {
throw new NullPointerException("messageKey");
}
FacesMessage result = detectLocalesAndCreate(facesContext, MESSAGE_FACTORY, messageKey, args);
if (result != null) {
result.setSeverity(severity);
}
return result;
}
public String getMessageText(FacesContext facesContext, Enum<?> messageKey, Object... args) {
String text = detectLocalesAndCreate(facesContext, LABEL_FACTORY, messageKey, args);
if (text == null) {
text = "???" + messageKey + "???";
}
return text;
}
public String getMessageFormat(FacesContext facesContext, Enum<?> messageKey) {
String text = detectLocalesAndCreate(facesContext, FORMAT_FACTORY, messageKey);
if (Strings.isNullOrEmpty(text)) {
throw new IllegalStateException("Format not found");
}
return text;
}
protected <T> T detectLocalesAndCreate(FacesContext context, Factory<T> factory, Enum<?> messageKey, Object... args) {
T result = null;
Locale locale = detectLocale(context);
if (locale != null) {
result = create(context, factory, locale, messageKey, args);
}
if (result == null) {
Locale defaultLocale = Locale.getDefault();
if (!defaultLocale.equals(locale)) {
result = create(context, factory, defaultLocale, messageKey, args);
}
}
return result;
}
protected <T> T create(FacesContext context, Factory<T> factory, Locale locale, Enum<?> messageKey, Object... args) {
MessageBundle messageBundle = messageKey.getClass().getAnnotation(MessageBundle.class);
if (messageBundle == null) {
return null;
}
T result = null;
try {
ResourceBundle bundle = bundleLoader.getApplicationBundle(context, messageKey, locale);
result = factory.create(bundle, messageKey, args);
} catch (MissingResourceException e) {
// do nothing
}
if (result == null) {
try {
ResourceBundle bundle = bundleLoader.getBundle(messageKey, locale);
result = factory.create(bundle, messageKey, args);
} catch (MissingResourceException e) {
// do nothing
}
}
return result;
}
}