| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.commons.vfs.util; |
| |
| import java.text.MessageFormat; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.MissingResourceException; |
| import java.util.ResourceBundle; |
| |
| /** |
| * Formats messages. |
| * |
| * @author <a href="mailto:adammurdoch@apache.org">Adam Murdoch</a> |
| * @version $Revision$ $Date$ |
| */ |
| public final class Messages |
| { |
| /** |
| * Map from message code to MessageFormat object for the message. |
| */ |
| private static Map messages = new HashMap(); |
| private static ResourceBundle resources; |
| |
| private Messages() |
| { |
| } |
| |
| /** |
| * Formats a message. |
| * |
| * @param code The message code. |
| * @return The formatted message. |
| */ |
| public static String getString(final String code) |
| { |
| return getString(code, new Object[0]); |
| } |
| |
| /** |
| * Formats a message. |
| * |
| * @param code The message code. |
| * @param param The message parameter. |
| * @return The formatted message. |
| */ |
| public static String getString(final String code, final Object param) |
| { |
| return getString(code, new Object[]{param}); |
| } |
| |
| /** |
| * Formats a message. |
| * |
| * @param code The message code. |
| * @param params The message parameters. |
| * @return The formatted message. |
| */ |
| public static String getString(final String code, final Object[] params) |
| { |
| try |
| { |
| if (code == null) |
| { |
| return null; |
| } |
| |
| final MessageFormat msg = findMessage(code); |
| return msg.format(params); |
| } |
| catch (final MissingResourceException mre) |
| { |
| return "Unknown message with code \"" + code + "\"."; |
| } |
| } |
| |
| /** |
| * Locates a message by its code. |
| */ |
| private static synchronized MessageFormat findMessage(final String code) |
| throws MissingResourceException |
| { |
| // Check if the message is cached |
| MessageFormat msg = (MessageFormat) messages.get(code); |
| if (msg != null) |
| { |
| return msg; |
| } |
| |
| // Locate the message |
| if (resources == null) |
| { |
| resources = new CombinedResources("org.apache.commons.vfs.Resources"); |
| } |
| final String msgText = resources.getString(code); |
| msg = new MessageFormat(msgText); |
| messages.put(code, msg); |
| return msg; |
| } |
| } |