protected static Application getApplication() 
{
        FacesContext context = FacesContext.getCurrentInstance();
        if (context != null) {
            return (FacesContext.getCurrentInstance().getApplication());
        }
        ApplicationFactory afactory = (ApplicationFactory)
            FactoryFinder.getFactory(FactoryFinder.APPLICATION_FACTORY);
        return (afactory.getApplication());
}

 protected static ClassLoader getCurrentLoader(Object fallbackClass) 
{
        ClassLoader loader =
            Thread.currentThread().getContextClassLoader();
        if (loader == null) {
            loader = fallbackClass.getClass().getClassLoader();
        }
        return loader;
}

 static Object getLabel(FacesContext context,
    UIComponent component) 
{
                                        
        Object o = component.getAttributes().get("label");
        if (o == null || (o instanceof String && ((String) o).length() == 0)) {
            o = component.getValueExpression("label");
        }
        // Use the "clientId" if there was no label specified.
        if (o == null) {
            o = component.getClientId(context);
        }
        return o;
}

Returns the label property from the specified component.

 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);
}

This version of getMessage() is used for localizing implementation specific messages.

 static FacesMessage getMessage(String messageId,
    Severity severity,
    Object params) 
{
        FacesMessage message = getMessage(messageId, params);
        message.setSeverity(severity);
        return message;
}

 static FacesMessage getMessage(Locale locale,
    String messageId,
    Object params) 
{
       
        String summary = null;
        String detail = null;       
        ResourceBundle bundle;
        String bundleName;
        // 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);
                    detail = bundle.getString(messageId + "_detail");
                }
                catch (MissingResourceException e) {
                    // ignore
                }
            }
        }
        // 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);
                detail = bundle.getString(messageId + "_detail");
            } catch (MissingResourceException e) {
                // ignore
            }
        }
        // no hit found in the standard javax.faces.Messages bundle.
        // check the Mojarra resources
        if (summary == null) {
            // see if we have a summary in the app provided bundle
            bundle = ResourceBundle.getBundle(MOJARRA_RESOURCE_BASENAME,
                                              locale,
                                              getCurrentLoader(bundleName));
            if (null == bundle) {
                throw new NullPointerException();
            }
            // see if we have a hit
            try {
                summary = bundle.getString(messageId);
            } catch (MissingResourceException e) {
                return null;
            }
        }
        // At this point, we have a summary and a bundle.     
        FacesMessage ret = new BindingFacesMessage(locale, summary, detail, params);
        ret.setSeverity(FacesMessage.SEVERITY_ERROR);
        return (ret);
}

Creates and returns a FacesMessage for the specified Locale.

 static FacesMessage getMessage(FacesContext context,
    String messageId,
    Object params) 
{
                                                
        if (context == null || messageId == null ) {
            throw new NullPointerException(" context " 
                + context 
                + " messageId " 
                + messageId);
        }
        Locale locale;
        // viewRoot may not have been initialized at this point.
        if (context.getViewRoot() != null) {
            locale = context.getViewRoot().getLocale();
        } else {
            locale = Locale.getDefault();
        }
        if (null == locale) {
            throw new NullPointerException(" locale is null ");
        }
        FacesMessage message = getMessage(locale, messageId, params);
        if (message != null) {
            return message;
        }
        locale = Locale.getDefault();
        return (getMessage(locale, messageId, params));
}

Creates and returns a FacesMessage for the specified Locale.

 static FacesMessage getMessage(Locale locale,
    String messageId,
    Severity severity,
    Object params) 
{
        FacesMessage message = getMessage(locale, messageId, params);
        message.setSeverity(severity);
        return message;
}

 static FacesMessage getMessage(FacesContext context,
    String messageId,
    Severity severity,
    Object params) 
{
        FacesMessage message = getMessage(context, messageId, params);
        message.setSeverity(severity);
        return message;
}