    001    // Copyright 2006 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    //     http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.ioc.internal.util;
    016
    017    import org.apache.tapestry5.ioc.Messages;
    018    import org.apache.tapestry5.ioc.util.AbstractMessages;
    019
    020    import java.util.Enumeration;
    021    import java.util.Locale;
    022    import java.util.Map;
    023    import java.util.ResourceBundle;
    024
    025    /**
    026     * Implementation of {@link org.apache.tapestry5.ioc.Messages} based around a {@link java.util.ResourceBundle}.
    027     */
    028    public class MessagesImpl extends AbstractMessages
    029    {
    030        private final Map<String, String> properties = CollectionFactory.newCaseInsensitiveMap();
    031
    032        /**
    033         * Finds the messages for a given Messages utility class. Strings the trailing "Messages" and replaces it with
    034         * "Strings" to form the base path. Loads the bundle using the default locale, and the class' class loader.
    035         *
    036         * @param forClass
    037         * @return Messages for the class
    038         */
    039        public static Messages forClass(Class forClass)
    040        {
    041            String className = forClass.getName();
    042            String stringsClassName = className.replaceAll("Messages$", "Strings");
    043
    044            Locale locale = Locale.getDefault();
    045
    046            ResourceBundle bundle = ResourceBundle.getBundle(stringsClassName, locale, forClass.getClassLoader());
    047
    048            return new MessagesImpl(locale, bundle);
    049        }
    050
    051        public MessagesImpl(Locale locale, ResourceBundle bundle)
    052        {
    053            super(locale);
    054
    055            // Our best (threadsafe) chance to determine all the available keys.
    056            Enumeration<String> e = bundle.getKeys();
    057            while (e.hasMoreElements())
    058            {
    059                String key = e.nextElement();
    060                String value = bundle.getString(key);
    061
    062                properties.put(key, value);
    063            }
    064        }
    065
    066        @Override
    067        protected String valueForKey(String key)
    068        {
    069            return properties.get(key);
    070        }
    071
    072    }