/*
* Copyright 2007 Sun Microsystems, Inc.
* All rights reserved. You may not modify, use,
* reproduce, or distribute this software except in
* compliance with the terms of the License at:
* http://developer.sun.com/berkeley_license.html
*/
package com.sun.bookstore6.util;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.MissingResourceException;
import javax.faces.application.Application;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import java.text.MessageFormat;
/**
*
* <p>supported filters: <code>package</code> and
* <code>protection</code>.</p>
*/
public class MessageFactory extends Object {
//
// Protected Constants
//
//
// Class Variables
//
//
// Instance Variables
//
// Attribute Instance Variables
// Relationship Instance Variables
//
// Constructors and Initializers
//
private MessageFactory() {
}
//
// Class methods
//
//
// General Methods
//
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);
MessageFormat mf = new MessageFormat(msgtext);
if (locale != null) {
mf.setLocale(locale);
b.append(mf.format(params));
localizedStr = b.toString();
}
return localizedStr;
}
/**
* This version of getMessage() is used in the RI for localizing RI
* specific messages.
*/
public static FacesMessage getMessage(
String messageId,
Object[] params) {
Locale locale = null;
FacesContext context = FacesContext.getCurrentInstance();
// context.getViewRoot() may not have been initialized at this point.
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) {
FacesMessage result = null;
String summary = null;
String detail = null;
String bundleName = null;
ResourceBundle bundle = null;
// see if we have a user-provided bundle
if (null != (bundleName = getApplication()
.getMessageBundle())) {
if (null != (bundle = ResourceBundle.getBundle(
bundleName,
locale,
getCurrentLoader(bundleName)))) {
// see if we have a hit
try {
summary = bundle.getString(messageId);
} catch (MissingResourceException e) {
}
}
}
// we couldn't find a summary in the user-provided bundle
if (null == summary) {
// see if we have a summary in the app provided bundle
bundle = ResourceBundle.getBundle(
FacesMessage.FACES_MESSAGES,
locale,
getCurrentLoader(bundleName));
if (null == bundle) {
throw new NullPointerException();
}
// see if we have a hit
try {
summary = bundle.getString(messageId);
} catch (MissingResourceException e) {
}
}
// we couldn't find a summary anywhere! Return null
if (null == summary) {
return null;
}
// At this point, we have a summary and a bundle.
if ((null == summary) || (null == bundle)) {
throw new NullPointerException();
}
summary = substituteParams(locale, summary, params);
try {
detail = substituteParams(
locale,
bundle.getString(messageId + "_detail"),
params);
} catch (MissingResourceException e) {
}
return (new FacesMessage(summary, detail));
}
//
// Methods from MessageFactory
//
public static FacesMessage getMessage(
FacesContext context,
String messageId) {
return getMessage(context, messageId, null);
}
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object[] params) {
if ((context == null) || (messageId == null)) {
throw new NullPointerException(
"One or more parameters could be null");
}
Locale locale = null;
// viewRoot may not have been initialized at this point.
if ((context != null) && (context.getViewRoot() != null)) {
locale = context.getViewRoot()
.getLocale();
} else {
locale = Locale.getDefault();
}
if (null == locale) {
throw new NullPointerException();
}
FacesMessage message = getMessage(locale, messageId, params);
if (message != null) {
return message;
}
locale = Locale.getDefault();
return (getMessage(locale, messageId, params));
}
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object param0) {
return getMessage(
context,
messageId,
new Object[] { param0 });
}
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object param0,
Object param1) {
return getMessage(
context,
messageId,
new Object[] { param0, param1 });
}
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object param0,
Object param1,
Object param2) {
return getMessage(
context,
messageId,
new Object[] { param0, param1, param2 });
}
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object param0,
Object param1,
Object param2,
Object param3) {
return getMessage(
context,
messageId,
new Object[] { param0, param1, param2, param3 });
}
protected static Application getApplication() {
return (FacesContext.getCurrentInstance().getApplication());
}
protected static ClassLoader getCurrentLoader(Object fallbackClass) {
ClassLoader loader = Thread.currentThread()
.getContextClassLoader();
if (loader == null) {
loader = fallbackClass.getClass()
.getClassLoader();
}
return loader;
}
} // end of class MessageFactory