1 /* |
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2 * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Sun designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Sun in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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22 * CA 95054 USA or visit www.sun.com if you need additional information or |
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23 * have any questions. |
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24 */ |
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25 |
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26 package com.sun.tools.javac.util; |
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27 |
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28 import java.util.ResourceBundle; |
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29 import java.util.MissingResourceException; |
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30 import java.text.MessageFormat; |
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31 |
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32 /** |
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33 * Support for localized messages. |
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34 * |
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35 * <p><b>This is NOT part of any API supported by Sun Microsystems. If |
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36 * you write code that depends on this, you do so at your own risk. |
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37 * This code and its internal interfaces are subject to change or |
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38 * deletion without notice.</b> |
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39 */ |
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40 public class Messages { |
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41 /** The context key for the Messages object. */ |
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42 protected static final Context.Key<Messages> messagesKey = |
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43 new Context.Key<Messages>(); |
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44 |
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45 /** Get the Messages instance for this context. */ |
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46 public static Messages instance(Context context) { |
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47 Messages instance = context.get(messagesKey); |
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48 if (instance == null) |
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49 instance = new Messages(context); |
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50 return instance; |
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51 } |
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52 |
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53 private List<ResourceBundle> bundles = List.nil(); |
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54 |
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55 /** Creates a Messages object. |
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56 */ |
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57 public Messages(Context context) { |
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58 context.put(messagesKey, this); |
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59 add(getDefaultBundle()); |
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60 } |
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61 |
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62 /** Creates a Messages object. |
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63 * @param bundle the name to identify the resource buundle of localized messages. |
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64 */ |
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65 public Messages(String bundleName) throws MissingResourceException { |
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66 add(bundleName); |
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67 } |
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68 |
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69 /** Creates a Messages object. |
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70 * @param bundle the name to identif the resource buundle of localized messages. |
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71 */ |
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72 public Messages(ResourceBundle bundle) throws MissingResourceException { |
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73 add(bundle); |
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74 } |
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75 |
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76 /** Add a new resource bundle to the list that is searched for localized messages. |
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77 * @param bundle the name to identify the resource bundle of localized messages. |
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78 */ |
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79 public void add(String bundleName) throws MissingResourceException { |
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80 add(ResourceBundle.getBundle(bundleName)); |
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81 } |
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82 |
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83 /** Add a new resource bundle to the list that is searched for localized messages. |
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84 * Resource bundles will be searched in reverse order in which they are added. |
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85 * @param bundle the bundle of localized messages. |
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86 */ |
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87 public void add(ResourceBundle bundle) { |
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88 bundles = bundles.prepend(bundle); |
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89 } |
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90 |
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91 /** Gets the localized string corresponding to a key, formatted with a set of args. |
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92 */ |
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93 public String getLocalizedString(String key, Object... args) { |
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94 return getLocalizedString(bundles, key, args); |
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95 } |
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96 |
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97 |
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98 /* Static access: |
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99 * javac has a firmly entrenched notion of a default message bundle |
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100 * which it can access from any static context. This is used to get |
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101 * easy access to simple localized strings. |
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102 */ |
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103 |
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104 private static final String defaultBundleName = |
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105 "com.sun.tools.javac.resources.compiler"; |
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106 private static ResourceBundle defaultBundle; |
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107 private static Messages defaultMessages; |
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108 |
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109 |
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110 /** |
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111 * Gets a localized string from the compiler's default bundle. |
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112 */ |
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113 // used to support legacy Log.getLocalizedString |
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114 static String getDefaultLocalizedString(String key, Object... args) { |
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115 return getLocalizedString(List.of(getDefaultBundle()), key, args); |
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116 } |
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117 |
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118 // used to support legacy static Diagnostic.fragment |
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119 static Messages getDefaultMessages() { |
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120 if (defaultMessages == null) |
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121 defaultMessages = new Messages(getDefaultBundle()); |
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122 return defaultMessages; |
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123 } |
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124 |
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125 public static ResourceBundle getDefaultBundle() { |
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126 try { |
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127 if (defaultBundle == null) |
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128 defaultBundle = ResourceBundle.getBundle(defaultBundleName); |
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129 return defaultBundle; |
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130 } |
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131 catch (MissingResourceException e) { |
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132 throw new Error("Fatal: Resource for compiler is missing", e); |
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133 } |
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134 } |
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135 |
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136 private static String getLocalizedString(List<ResourceBundle> bundles, |
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137 String key, |
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138 Object... args) { |
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139 String msg = null; |
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140 for (List<ResourceBundle> l = bundles; l.nonEmpty() && msg == null; l = l.tail) { |
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141 ResourceBundle rb = l.head; |
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142 try { |
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143 msg = rb.getString(key); |
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144 } |
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145 catch (MissingResourceException e) { |
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146 // ignore, try other bundles in list |
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147 } |
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148 } |
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149 if (msg == null) { |
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150 msg = "compiler message file broken: key=" + key + |
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151 " arguments={0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}"; |
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152 } |
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153 return MessageFormat.format(msg, args); |
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154 } |
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155 |
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156 |
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157 } |
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