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/*
 * Copyright 2003-2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.codehaus.groovy.tools.shell.util;

import java.util.ResourceBundle;
import java.util.MissingResourceException;

import java.text.MessageFormat;

import groovy.lang.GroovyObjectSupport;

/**
 * Message source backed up by one or more {@link java.util.ResourceBundle}
 * instances for simple i18n support.
 *
 * @version $Id$
 * @author Jason Dillon
 */
public class MessageSource
    extends GroovyObjectSupport
{
    private final String[] bundleNames;
    
    private ResourceBundle[] cachedBundles;
    
    public MessageSource(final String[] names) {
        assert names != null;
        assert names.length != 0;
        
        this.bundleNames = names;
    }
    
    public MessageSource(final String name) {
        this(new String[] { name });
    }
    
    private static String[] classNames(final Class[] types) {
        assert types != null;
        assert types.length != 0;
        
        String[] names = new String[types.length];
        
        for (int i=0; i