001/*
002 * (C) Copyright 2006-2008 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 *
019 * $Id$
020 */
021
022package org.nuxeo.ecm.webengine.model;
023
024import java.util.HashMap;
025import java.util.Locale;
026import java.util.Map;
027import java.util.MissingResourceException;
028import java.util.concurrent.ConcurrentHashMap;
029
030/**
031 * @author <a href="mailto:[email protected]">Bogdan Stefanescu</a>
032 */
033public class Messages {
034
035    protected final Messages parent;
036
037    protected final MessagesProvider provider;
038
039    protected final Map<String, MessagesBundle> messages;
040
041    protected MessagesBundle defaultMessages;
042
043    protected static final String BUILT_IN_DEFAULT_LANG = "en";
044
045    public Messages(Messages parent, MessagesProvider provider) {
046        this.parent = parent;
047        this.provider = provider;
048        messages = new ConcurrentHashMap<String, MessagesBundle>();
049        String serverDefaultLang = Locale.getDefault().getLanguage();
050        defaultMessages = getMessagesBundle(serverDefaultLang);
051        if (defaultMessages == null) {
052            defaultMessages = new MessagesBundle(null, new HashMap<String, String>());
053        }
054        if (defaultMessages.messages.size() == 0 && !BUILT_IN_DEFAULT_LANG.equals(serverDefaultLang)) {
055            defaultMessages = getMessagesBundle(BUILT_IN_DEFAULT_LANG);
056        }
057    }
058
059    public MessagesBundle getMessagesBundle() {
060        return defaultMessages;
061    }
062
063    public MessagesBundle getMessagesBundle(String language) {
064        if (language == null) {
065            return defaultMessages;
066        }
067        MessagesBundle bundle = messages.get(language);
068        if (bundle == null) {
069            Map<String, String> map = provider.getMessages(language);
070            if (map == null && defaultMessages != null) {
071                return defaultMessages;
072            }
073            MessagesBundle parentBundle = parent != null ? parent.getMessagesBundle(language) : null;
074            bundle = new MessagesBundle(parentBundle, map);
075            messages.put(language, bundle);
076        }
077        return bundle;
078    }
079
080    public Object getObject(String key, String language) {
081        MessagesBundle bundle = getMessagesBundle(language);
082        if (bundle != null) {
083            return bundle.getObject(key);
084        }
085        throw new MissingResourceException("Can't find resource for bundle " + this.getClass().getName() + ", key "
086                + key, Messages.class.getName(), key);
087    }
088
089    public Object getObject(String key) {
090        return getObject(key, null);
091    }
092
093    public String getString(String key) {
094        return getString(key, null);
095    }
096
097    public String getString(String key, String language) {
098        return (String) getObject(key, language);
099    }
100
101    public String[] getStringArray(String key) {
102        return getStringArray(key, null);
103    }
104
105    public String[] getStringArray(String key, String language) {
106        return (String[]) getObject(key, language);
107    }
108
109}