messages.java

It is a java server faces tab component.

package com.cim.jsf.util;


import java.text.MessageFormat;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
import javax.faces.application.Application;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;

public class Messages {

		/**
		 * Gets the resource bundle associated with current context
		 * @param context FacesContext
		 * @return ResourceBundle
		 */

	public static ResourceBundle getBundle(FacesContext context) {
		Application app = context.getApplication();
		String appBundle = app.getMessageBundle();
		Locale locale = getLocale( context );
		ClassLoader loader = getClassLoader();
		ResourceBundle bundle = null;

		//System.out.println( "appBundle::" + appBundle);

		if (appBundle != null) {
			bundle = ResourceBundle.getBundle( appBundle, locale, loader );
		}

		return bundle;
	}

	/**
	 * Gets the localized string from the resource bundles
	 * Returns null if resource not found in the resource bundle.
	 * @param bundle ResourceBundle
	 * @param resourceId String
	 * @return String
	 */
	public static String getMessageResourceString(ResourceBundle bundle, String resourceId) {
	 String resource = null;

	 if ( bundle != null ) {
		 try {
			 //System.out.println("resourceId::" + resourceId);
			 resource = bundle.getString( resourceId );
			 //System.out.println("resource::" + resource);
		 } catch ( MissingResourceException ex ) {
			 return null;
		 }
	 }
	 if (resource == null) return null; // no match
	 else return resource;

   }


   public static FacesMessage getMessage(String bundleName, String resourceId,
	  Object[] params) {
	  FacesContext context = FacesContext.getCurrentInstance();
	  Application app = context.getApplication();
	  String appBundle = app.getMessageBundle();
	  Locale locale = getLocale(context);
	  ClassLoader loader = getClassLoader();
	  String summary = getString(appBundle, bundleName, resourceId,
		 locale, loader, params);
	  if (summary == null) summary = "???" + resourceId + "???";
	  String detail = getString(appBundle, bundleName, resourceId + "_detail",
		 locale, loader, params);
	  return new FacesMessage(summary, detail);
   }

   public static String getString(String bundle, String resourceId,
		 Object[] params) {
	  FacesContext context = FacesContext.getCurrentInstance();
	  Application app = context.getApplication();
	  String appBundle = app.getMessageBundle();
	  Locale locale = getLocale(context);
	  ClassLoader loader = getClassLoader();
	  return getString(appBundle, bundle, resourceId, locale, loader, params);
   }

   public static String getString(String bundle1, String bundle2,
		 String resourceId, Locale locale, ClassLoader loader,
		 Object[] params) {
	  String resource = null;
	  ResourceBundle bundle;

	  if (bundle1 != null) {
		 bundle = ResourceBundle.getBundle(bundle1, locale, loader);
		 if (bundle != null)
			try {
			   resource = bundle.getString(resourceId);
			} catch (MissingResourceException ex) {
			}
	  }

	  if (resource == null) {
		 bundle = ResourceBundle.getBundle(bundle2, locale, loader);
		 if (bundle != null)
			try {
			   resource = bundle.getString(resourceId);
			} catch (MissingResourceException ex) {
			}
	  }

	  if (resource == null) return null; // no match
	  if (params == null) return resource;

	  MessageFormat formatter = new MessageFormat(resource, locale);
	  return formatter.format(params);
   }

   public static Locale getLocale(FacesContext context) {
	  Locale locale = null;
	  UIViewRoot viewRoot = context.getViewRoot();
	  if (viewRoot != null) locale = viewRoot.getLocale();
	  if (locale == null) locale = Locale.getDefault();
	  return locale;
   }

   public static ClassLoader getClassLoader() {
	  ClassLoader loader = Thread.currentThread().getContextClassLoader();
	  if (loader == null) loader = ClassLoader.getSystemClassLoader();
	  return loader;
   }

   public static String getString(FacesContext context, String resourceId) {
	  Application app = context.getApplication();
	  String appBundle = app.getMessageBundle();
	  Locale locale = getLocale(context);
	  ClassLoader loader = getClassLoader();
	  return getString(appBundle, locale, loader, resourceId);
   }

   public static String getString(String appBundle, Locale locale, ClassLoader loader, String resourceId) {
	  String resource = null;
	  ResourceBundle bundle;

	  if (appBundle != null) {
		 bundle = ResourceBundle.getBundle(appBundle, locale, loader);
		 if (bundle != null)
			try {
			   resource = bundle.getString(resourceId);
			} catch (MissingResourceException ex) {
			}
	  }

	  if (resource == null) return null; // no match
	  else return resource;
   }

}