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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
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 * only if the new code is made subject to such option by the copyright
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 */

package org.glassfish.persistence.common;

import java.util.*;
import java.text.MessageFormat;

public class I18NHelper {
	private static final String bundleSuffix = ".Bundle";	// NOI18N
	private static Hashtable	bundles = new Hashtable();
  	private static Locale 		locale = Locale.getDefault();

	/**
	 * Constructor
	 */
  	public I18NHelper() {
  	}

	/**
	 * Load ResourceBundle by bundle name
	 */
  	public static ResourceBundle loadBundle(String bundleName) {
		return loadBundle(bundleName, I18NHelper.class.getClassLoader());
  	}

	/**
	 * Load ResourceBundle by bundle name and class loader
	 */
  	public static ResourceBundle loadBundle(String bundleName, ClassLoader loader) {
      		ResourceBundle messages = (ResourceBundle)bundles.get(bundleName);

    		if (messages == null) //not found as loaded - add
		{
      			messages = ResourceBundle.getBundle(bundleName, locale, loader);
			bundles.put(bundleName, messages);
    		}
		return messages;
  	}

	/**
	 * Load ResourceBundle by class object - figure out the bundle name
	 * for the class object's package and use the class' class loader.
	 */
  	public static ResourceBundle loadBundle(Class classObject) {
		return loadBundle(
    			getPackageName(classObject.getName()) + bundleSuffix,
    				classObject.getClassLoader());
	}

  
	/**
	 * Returns message as String
	 */
	final public static String getMessage(ResourceBundle messages, String messageKey) 
	{
    		return messages.getString(messageKey);
  	}

  	/**
	 * Formats message by adding Array of arguments
	 */
	final public static String getMessage(ResourceBundle messages, String messageKey, Object msgArgs[]) 
	{
    		for (int i=0; i