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| 1 | /* | ||
| 2 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package com.sun.rowset; | ||
| 27 | |||
| 28 | import java.io.*; | ||
| 29 | import java.util.*; | ||
| 30 | |||
| 31 | /** | ||
| 32 | * This class is used to help in localization of resources, | ||
| 33 | * especially the exception strings. | ||
| 34 | * | ||
| 35 | * @author Amit Handa | ||
| 36 | */ | ||
| 37 | |||
| 38 | public class JdbcRowSetResourceBundle implements Serializable { | ||
| 39 | |||
| 40 | /** | ||
| 41 | * This <code>String</code> variable stores the location | ||
| 42 | * of the resource bundle location. | ||
| 43 | */ | ||
| 44 | private static String fileName; | ||
| 45 | |||
| 46 | /** | ||
| 47 | * This variable will hold the <code>PropertyResourceBundle</code> | ||
| 48 | * of the text to be internationalized. | ||
| 49 | */ | ||
| 50 | private transient PropertyResourceBundle propResBundle; | ||
| 51 | |||
| 52 | /** | ||
| 53 | * The constructor initializes to this object | ||
| 54 | * | ||
| 55 | */ | ||
| 56 | private static volatile JdbcRowSetResourceBundle jpResBundle; | ||
| 57 | |||
| 58 | /** | ||
| 59 | * The variable which will represent the properties | ||
| 60 | * the suffix or extension of the resource bundle. | ||
| 61 | **/ | ||
| 62 | private static final String PROPERTIES = "properties"; | ||
| 63 | |||
| 64 | /** | ||
| 65 | * The variable to represent underscore | ||
| 66 | **/ | ||
| 67 | private static final String UNDERSCORE = "_"; | ||
| 68 | |||
| 69 | /** | ||
| 70 | * The variable which will represent dot | ||
| 71 | **/ | ||
| 72 | private static final String DOT = "."; | ||
| 73 | |||
| 74 | /** | ||
| 75 | * The variable which will represent the slash. | ||
| 76 | **/ | ||
| 77 | private static final String SLASH = "/"; | ||
| 78 | |||
| 79 | /** | ||
| 80 | * The variable where the default resource bundle will | ||
| 81 | * be placed. | ||
| 82 | **/ | ||
| 83 | private static final String PATH = "com/sun/rowset/RowSetResourceBundle"; | ||
| 84 | |||
| 85 | /** | ||
| 86 | * The constructor which initializes the resource bundle. | ||
| 87 | * Note this is a private constructor and follows Singleton | ||
| 88 | * Design Pattern. | ||
| 89 | * | ||
| 90 | * @throws IOException if unable to load the ResourceBundle | ||
| 91 | * according to locale or the default one. | ||
| 92 | */ | ||
| 93 | private JdbcRowSetResourceBundle () throws IOException { | ||
| 94 | // Try to load the resource bundle according | ||
| 95 | // to the locale. Else if no bundle found according | ||
| 96 | // to the locale load the default. | ||
| 97 | |||
| 98 | // In default case the default locale resource bundle | ||
| 99 | // should always be loaded else it | ||
| 100 | // will be difficult to throw appropriate | ||
| 101 | // exception string messages. | ||
| 102 | Locale locale = Locale.getDefault(); | ||
| 103 | |||
| 104 | // Load appropriate bundle according to locale | ||
| 105 | propResBundle = (PropertyResourceBundle) ResourceBundle.getBundle(PATH, | ||
| 106 | locale, Thread.currentThread().getContextClassLoader()); | ||
| 107 | |||
| 108 | } | ||
| 109 | |||
| 110 | /** | ||
| 111 | * This method is used to get a handle to the | ||
| 112 | * initialized instance of this class. Note that | ||
| 113 | * at any time there is only one instance of this | ||
| 114 | * class initialized which will be returned. | ||
| 115 | * | ||
| 116 | * @throws IOException if unable to find the RowSetResourceBundle.properties | ||
| 117 | */ | ||
| 118 | public static JdbcRowSetResourceBundle getJdbcRowSetResourceBundle() | ||
| 119 | throws IOException { | ||
| 120 | |||
| 121 | if(jpResBundle == null){ | ||
| 122 | synchronized(JdbcRowSetResourceBundle.class) { | ||
| 123 | if(jpResBundle == null){ | ||
| 124 | jpResBundle = new JdbcRowSetResourceBundle(); | ||
| 125 | } //end if | ||
| 126 | } //end synchronized block | ||
| 127 | } //end if | ||
| 128 | return jpResBundle; | ||
| 129 | } | ||
| 130 | |||
| 131 | /** | ||
| 132 | * This method returns an enumerated handle of the keys | ||
| 133 | * which correspond to values translated to various locales. | ||
| 134 | * | ||
| 135 | * @return an enumeration of keys which have messages tranlated to | ||
| 136 | * corresponding locales. | ||
| 137 | */ | ||
| 138 | public Enumeration getKeys() { | ||
| 139 | return propResBundle.getKeys(); | ||
| 140 | } | ||
| 141 | |||
| 142 | |||
| 143 | /** | ||
| 144 | * This method takes the key as an argument and | ||
| 145 | * returns the corresponding value reading it | ||
| 146 | * from the Resource Bundle loaded earlier. | ||
| 147 | * | ||
| 148 | * @return value in locale specific language | ||
| 149 | * according to the key passed. | ||
| 150 | */ | ||
| 151 | public Object handleGetObject(String key) { | ||
| 152 | return propResBundle.handleGetObject(key); | ||
| 153 | } | ||
| 154 | |||
| 155 | static final long serialVersionUID = 436199386225359954L; | ||
| 156 | } | ||