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JSF components and utilities that can be used with any JSF implementation.
This library is compatible with both JSF1.1 and JSF1.2; however for JSF1.2 users there
is an alternative build of Tomahawk available that takes advantage of JSF1.2 features to
offer some additional benefits.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.myfaces.shared_tomahawk.util;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.faces.application.FacesMessage;
import javax.faces.application.ApplicationFactory;
import javax.faces.application.Application;
import javax.faces.context.FacesContext;
import javax.faces.FactoryFinder;
import java.text.MessageFormat;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
/**
* Utility class to support multilingual FacesMessages using ResourceBundles.
* Standard messages are stored at DEFAULT_BUNDLE.
* The summary of the message is stored at the requested key value. The detail
* of the message is stored at <messageId>_detail.
*
* @see FacesMessage
* @see java.util.ResourceBundle
*
* @author Thomas Spiegl (latest modification by $Author: skitching $)
* @author Manfred Geiler
* @author Sean Schofield
* @author Stpehan Strittmatter
* @version $Revision: 673826 $ $Date: 2008-07-03 16:43:52 -0500 (Thu, 03 Jul 2008) $
*/
public final class MessageUtils
{
/** Utility class, do not instatiate */
private MessageUtils()
{
// nope
}
/** Default bundle for messages (javax.faces.Messages) */
private static final String DEFAULT_BUNDLE = "javax.faces.Messages";
/** Suffix for message details (_detail)*/
private static final String DETAIL_SUFFIX = "_detail";
private static Log log = LogFactory.getLog(MessageUtils.class);
/**
* @param severity serverity of message
* @param messageId id of message
* @param arg arument of message
*
* @return generated FacesMessage
*/
public static FacesMessage getMessage(FacesMessage.Severity severity,
String messageId,
Object arg)
{
return getMessage(severity,
messageId,
new Object[]{arg},
FacesContext.getCurrentInstance());
}
/**
* @param severity serverity of message
* @param messageId id of message
* @param args aruments of message
*
* @return generated FacesMessage
*/
public static FacesMessage getMessage(FacesMessage.Severity severity,
String messageId,
Object[] args)
{
return getMessage(severity,
messageId,
args,
FacesContext.getCurrentInstance());
}
public static FacesMessage getMessage(FacesMessage.Severity severity,
String messageId,
Object[] args,
FacesContext facesContext)
{
FacesMessage message = getMessage(facesContext, messageId, args);
message.setSeverity(severity);
return message;
}
public static void addMessage(FacesMessage.Severity severity,
String messageId,
Object[] args)
{
addMessage(severity, messageId, args, null, FacesContext.getCurrentInstance());
}
public static void addMessage(FacesMessage.Severity severity,
String messageId,
Object[] args,
FacesContext facesContext)
{
addMessage(severity, messageId, args, null, facesContext);
}
public static void addMessage(FacesMessage.Severity severity,
String messageId,
Object[] args,
String forClientId)
{
addMessage(severity, messageId, args, forClientId, FacesContext.getCurrentInstance());
}
public static void addMessage(FacesMessage.Severity severity,
String messageId,
Object[] args,
String forClientId,
FacesContext facesContext)
{
if(log.isTraceEnabled()) {
log.trace("adding message " + messageId + " for clientId " + forClientId);
}
facesContext.addMessage(forClientId,
getMessage(severity, messageId, args, facesContext));
}
/**
* Uses MessageFormat and the supplied parameters to fill in the param placeholders in the String.
*
* @param locale The Locale to use when performing the substitution.
* @param msgtext The original parameterized String.
* @param params The params to fill in the String with.
* @return The updated String.
*/
public static String substituteParams(Locale locale, String msgtext, Object params[])
{
String localizedStr = null;
if(params == null || msgtext == null)
return msgtext;
StringBuffer b = new StringBuffer(100);
if(locale != null)
{
MessageFormat mf = new MessageFormat(msgtext,locale);
b.append(mf.format(params));
localizedStr = b.toString();
}
return localizedStr;
}
public static FacesMessage getMessage(String messageId, Object params[])
{
Locale locale = null;
FacesContext context = FacesContext.getCurrentInstance();
if(context != null && context.getViewRoot() != null)
{
locale = context.getViewRoot().getLocale();
if(locale == null)
locale = Locale.getDefault();
} else
{
locale = Locale.getDefault();
}
return getMessage(locale, messageId, params);
}
public static FacesMessage getMessage(Locale locale, String messageId, Object params[])
{
String summary = null;
String detail = null;
String bundleName = getApplication().getMessageBundle();
ResourceBundle bundle = null;
if (bundleName != null)
{
try
{
bundle = ResourceBundle.getBundle(bundleName, locale, org.apache.myfaces.shared_tomahawk.util.ClassUtils.getCurrentLoader(bundleName));
summary = bundle.getString(messageId);
}
catch (MissingResourceException e) {
// NoOp
}
}
if (summary == null)
{
try
{
bundle = ResourceBundle.getBundle(DEFAULT_BUNDLE, locale, org.apache.myfaces.shared_tomahawk.util.ClassUtils.getCurrentLoader(DEFAULT_BUNDLE));
if(bundle == null)
{
throw new NullPointerException();
}
summary = bundle.getString(messageId);
}
catch(MissingResourceException e) {
// NoOp
}
}
if(summary == null)
{
summary = messageId;
}
if (bundle == null)
{
throw new NullPointerException(
"Unable to locate ResrouceBundle: bundle is null");
}
summary = substituteParams(locale, summary, params);
try
{
detail = substituteParams(locale,
bundle.getString(messageId + DETAIL_SUFFIX), params);
}
catch(MissingResourceException e) {
// NoOp
}
return new FacesMessage(summary, detail);
}
/**
* @param bundleBaseName baseName of ResourceBundle to load localized messages
* @param messageId id of message
* @param params parameters to set at localized message
* @return generated FacesMessage
*/
public static FacesMessage getMessage(String bundleBaseName, String messageId, Object params[])
{
return getMessage(bundleBaseName, getCurrentLocale(), messageId, params);
}
/**
*
* @return currently applicable Locale for this request.
*/
public static Locale getCurrentLocale() {
Locale locale;
FacesContext context = FacesContext.getCurrentInstance();
if(context != null && context.getViewRoot() != null) {
locale = context.getViewRoot().getLocale();
if(locale == null)
locale = Locale.getDefault();
} else {
locale = Locale.getDefault();
}
return locale;
}
/**
* @param severity severity of message
* @param bundleBaseName baseName of ResourceBundle to load localized messages
* @param messageId id of message
* @param params parameters to set at localized message
* @return generated FacesMessage
*/
public static FacesMessage getMessage(FacesMessage.Severity severity, String bundleBaseName, String messageId, Object params[])
{
FacesMessage msg = getMessage(bundleBaseName, messageId, params);
msg.setSeverity(severity);
return msg;
}
/**
* @param bundleBaseName baseName of ResourceBundle to load localized messages
* @param locale current locale
* @param messageId id of message
* @param params parameters to set at localized message
* @return generated FacesMessage
*/
public static FacesMessage getMessage(String bundleBaseName, Locale locale, String messageId, Object params[])
{
if (bundleBaseName == null)
{
throw new NullPointerException(
"Unable to locate ResourceBundle: bundle is null");
}
ResourceBundle bundle = ResourceBundle.getBundle(bundleBaseName, locale);
return getMessage(bundle, messageId, params);
}
/**
* @param bundle ResourceBundle to load localized messages
* @param messageId id of message
* @param params parameters to set at localized message
* @return generated FacesMessage
*/
public static FacesMessage getMessage(ResourceBundle bundle, String messageId, Object params[])
{
String summary = null;
String detail = null;
try
{
summary = bundle.getString(messageId);
}
catch (MissingResourceException e) {
// NoOp
}
if(summary == null)
{
summary = messageId;
}
summary = substituteParams(bundle.getLocale(), summary, params);
try
{
detail = substituteParams(bundle.getLocale(),
bundle.getString(messageId + DETAIL_SUFFIX), params);
}
catch(MissingResourceException e) {
// NoOp
}
return new FacesMessage(summary, detail);
}
/**
*
* @param context
* @param messageId
* @return generated FacesMessage
*/
public static FacesMessage getMessage(FacesContext context, String messageId)
{
return getMessage(context, messageId, ((Object []) (null)));
}
/**
*
* @param context
* @param messageId
* @param params
* @return generated FacesMessage
*/
public static FacesMessage getMessage(FacesContext context, String messageId, Object params[])
{
if(context == null || messageId == null)
throw new NullPointerException(" context " + context + " messageId " + messageId);
Locale locale = getCurrentLocale();
if(null == locale)
throw new NullPointerException(" locale " + locale);
FacesMessage message = getMessage(locale, messageId, params);
if(message != null)
{
return message;
} else
{
// TODO /FIX: Note that this has fallback behavior to default Locale for message,
// but similar behavior above does not. The methods should probably behave
locale = Locale.getDefault();
return getMessage(locale, messageId, params);
}
}
private static Application getApplication()
{
FacesContext context = FacesContext.getCurrentInstance();
if(context != null)
{
return FacesContext.getCurrentInstance().getApplication();
} else
{
ApplicationFactory afactory = (ApplicationFactory)FactoryFinder.getFactory("javax.faces.application.ApplicationFactory");
return afactory.getApplication();
}
}
}