Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/resources/Resources.java @ 9801:1d7a72a50183 3.2.x tip
Assume Compose V2, consistently
author | Tom Gottfried <tom@intevation.de> |
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date | Thu, 23 Nov 2023 10:14:13 +0100 |
parents | 0a5239a1e46e |
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rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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9 package org.dive4elements.river.artifacts.resources; |
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10 |
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11 import java.text.MessageFormat; |
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12 import java.util.Locale; |
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13 import java.util.MissingResourceException; |
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14 import java.util.ResourceBundle; |
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15 |
9726 | 16 import org.apache.logging.log4j.Logger; |
17 import org.apache.logging.log4j.LogManager; | |
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18 |
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19 import org.dive4elements.artifacts.CallMeta; |
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20 |
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21 /** |
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22 * This class provides methods for i18n. |
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23 * |
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24 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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25 */ |
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26 public class Resources { |
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27 |
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28 /** The log that is used in this class.*/ |
9726 | 29 private static Logger log = LogManager.getLogger(Resources.class); |
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30 |
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31 /** The singleton instance.*/ |
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32 private static Resources INSTANCE; |
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33 |
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34 /** The locales supported by this server.*/ |
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35 protected Locale[] locales; |
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36 |
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37 /** |
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38 * No instance of this class is necessary. |
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39 */ |
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40 private Resources() { |
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41 } |
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42 |
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43 |
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44 /** |
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45 * Returns the locales supported by this server. |
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46 * |
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47 * @return the supported locales. |
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48 */ |
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49 public synchronized Locale [] getLocales() { |
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50 if (locales == null) { |
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51 readLocales(); |
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52 } |
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53 |
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54 return locales; |
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55 } |
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56 |
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57 |
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58 /** |
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59 * Read the locales configured for this server. |
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60 */ |
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61 protected void readLocales() { |
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62 // TODO IMPLEMENT ME |
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63 |
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64 locales = new Locale[2]; |
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65 locales[0] = Locale.GERMANY; |
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66 locales[1] = Locale.ENGLISH; |
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67 } |
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68 |
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69 |
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70 private static synchronized void ensureInstance() { |
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71 if (INSTANCE == null) { |
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72 INSTANCE = new Resources(); |
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73 } |
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74 } |
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75 |
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76 |
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77 public static Locale getLocale(CallMeta meta) { |
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78 ensureInstance(); |
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79 |
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80 Locale[] locales = INSTANCE.getLocales(); |
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81 return meta.getPreferredLocale(locales); |
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82 } |
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83 |
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84 public static String getMsg(CallMeta meta, String key) { |
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85 return getMsg(meta, key, key); |
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86 } |
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87 |
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88 /** |
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89 * This method returns the translated value for <i>key</i> or <i>def</i> if |
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90 * <i>key</i> is not existing in the resource bundle. |
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91 * |
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92 * @param meta The CallMeta object of the request that contains the |
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93 * preferred locale. |
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94 * @param key The key that should be translated. |
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95 * @param def A default value that is returned, if <i>key</i> was not found. |
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96 * |
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97 * @return the translated message. |
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98 */ |
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99 public static String getMsg(CallMeta meta, String key, String def) { |
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100 ensureInstance(); |
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101 |
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102 Locale[] locales = INSTANCE.getLocales(); |
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103 Locale locale = meta.getPreferredLocale(locales); |
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104 |
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105 return getMsg(locale, key, def); |
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106 } |
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107 |
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108 public static String getMsg( |
3771 | 109 CallMeta meta, |
110 String key, | |
111 Object[] args | |
112 ) { | |
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113 return getMsg(meta, key, key, args); |
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114 } |
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115 |
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116 /** |
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117 * Returns a translated message based on a template specified by <i>key</i> |
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118 * that has necessary values to be filled in. |
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119 * |
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120 * @param meta The CallMeta object. |
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121 * @param key The key of the template in the resource bundle. |
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122 * @param def the default value if no template was found with <i>key</i>. |
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123 * @param args The arguments that are necessary for the template. |
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124 * |
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125 * @return a translated string. |
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126 */ |
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127 public static String getMsg( |
3771 | 128 CallMeta meta, |
129 String key, | |
130 String def, | |
131 Object[] args) | |
413
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132 { |
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133 String template = getMsg(meta, key, (String)null); |
413
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134 |
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135 if (template == null) { |
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136 return def; |
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137 } |
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138 |
3771 | 139 return format(meta, template, args); |
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140 } |
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141 |
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142 public static String format( |
3771 | 143 CallMeta meta, |
144 String key, | |
145 String def, | |
146 Object ... args | |
147 ) { | |
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148 String template = getMsg(meta, key, (String)null); |
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149 |
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150 if (template == null) { |
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151 template = def; |
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152 } |
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153 |
3771 | 154 return format(meta, template, args); |
155 } | |
156 | |
157 /** | |
158 * Formats the given template using the arguments with respect of the | |
159 * appropriate locale given by the CallMeta instance. | |
160 */ | |
161 public static String format(CallMeta meta, String templ, Object ... args) { | |
162 Locale locale = getLocale(meta); | |
163 MessageFormat mf = new MessageFormat(templ, locale); | |
164 | |
165 return mf.format(args, new StringBuffer(), null).toString(); | |
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166 } |
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167 |
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168 /** |
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169 * This method returns the translated value for <i>key</i> or <i>def</i> if |
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170 * <i>key</i> is not existing in the resource bundle. |
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171 * |
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172 * @param locale The locale. |
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173 * @param key The key that should be translated. |
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174 * @param def A default value that is returned, if <i>key</i> was not found. |
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175 * |
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176 * @return the translated message. |
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177 */ |
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178 public static String getMsg(Locale locale, String key, String def) { |
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179 ResourceBundle bundle = ResourceBundle.getBundle("messages", locale); |
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180 |
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181 try { |
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182 return bundle.getString(key); |
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183 } |
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184 catch (MissingResourceException mre) { |
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185 log.warn("No message found for key: " + key); |
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186 |
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187 return def; |
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188 } |
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189 } |
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190 } |
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191 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |