/* * $Id: MessageFactory.java,v 1.3 2004/11/14 07:33:08 tcfujii Exp $ *//* * Copyright 2004-2005 Sun Microsystems, Inc.  All rights reserved. * Use is subject to license terms. */package carstore;import javax.faces.application.Application;import javax.faces.application.FacesMessage;import javax.faces.context.FacesContext;import java.text.MessageFormat;import java.util.Locale;import java.util.MissingResourceException;import java.util.ResourceBundle;/** * <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,            detail = null,            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