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 015package org.apache.tapestry5.ioc.internal.util; 016 017import org.apache.tapestry5.ioc.Messages; 018import org.apache.tapestry5.ioc.util.AbstractMessages; 019 020import java.util.Enumeration; 021import java.util.Locale; 022import java.util.Map; 023import java.util.ResourceBundle; 024 025/** 026 * Implementation of {@link org.apache.tapestry5.ioc.Messages} based around a {@link java.util.ResourceBundle}. 027 */ 028public 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}