Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/resources/Resources.java @ 8222:1cd7225df846
Let official epochs be showy and remove detritus of 'yields' in datacage config.
author | Tom Gottfried <tom@intevation.de> |
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date | Mon, 08 Sep 2014 15:54:12 +0200 |
parents | e4606eae8ea5 |
children | e4aadc953665 0a5239a1e46e |
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 |
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16 import org.apache.log4j.Logger; |
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17 |
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18 import org.dive4elements.artifacts.CallMeta; |
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19 |
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20 /** |
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21 * This class provides methods for i18n. |
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22 * |
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23 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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24 */ |
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25 public class Resources { |
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26 |
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27 /** The log that is used in this class.*/ |
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28 private static Logger log = Logger.getLogger(Resources.class); |
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29 |
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30 /** The singleton instance.*/ |
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31 private static Resources INSTANCE; |
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32 |
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33 /** The locales supported by this server.*/ |
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34 protected Locale[] locales; |
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35 |
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36 /** |
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37 * No instance of this class is necessary. |
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38 */ |
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39 private Resources() { |
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40 } |
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41 |
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42 |
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43 /** |
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44 * Returns the locales supported by this server. |
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45 * |
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46 * @return the supported locales. |
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47 */ |
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48 public synchronized Locale [] getLocales() { |
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49 if (locales == null) { |
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50 readLocales(); |
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51 } |
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52 |
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53 return locales; |
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54 } |
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55 |
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56 |
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57 /** |
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58 * Read the locales configured for this server. |
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59 */ |
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60 protected void readLocales() { |
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61 // TODO IMPLEMENT ME |
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62 |
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63 locales = new Locale[2]; |
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64 locales[0] = Locale.GERMANY; |
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65 locales[1] = Locale.ENGLISH; |
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66 } |
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67 |
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68 |
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69 private static synchronized void ensureInstance() { |
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70 if (INSTANCE == null) { |
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71 INSTANCE = new Resources(); |
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72 } |
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73 } |
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74 |
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75 |
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76 public static Locale getLocale(CallMeta meta) { |
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77 ensureInstance(); |
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78 |
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79 Locale[] locales = INSTANCE.getLocales(); |
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80 return meta.getPreferredLocale(locales); |
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81 } |
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82 |
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83 public static String getMsg(CallMeta meta, String key) { |
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84 return getMsg(meta, key, key); |
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85 } |
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86 |
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87 /** |
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88 * This method returns the translated value for <i>key</i> or <i>def</i> if |
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89 * <i>key</i> is not existing in the resource bundle. |
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90 * |
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91 * @param meta The CallMeta object of the request that contains the |
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92 * preferred locale. |
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93 * @param key The key that should be translated. |
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94 * @param def A default value that is returned, if <i>key</i> was not found. |
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95 * |
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96 * @return the translated message. |
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97 */ |
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98 public static String getMsg(CallMeta meta, String key, String def) { |
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99 ensureInstance(); |
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100 |
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101 Locale[] locales = INSTANCE.getLocales(); |
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102 Locale locale = meta.getPreferredLocale(locales); |
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103 |
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104 return getMsg(locale, key, def); |
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105 } |
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106 |
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107 public static String getMsg( |
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109 String key, | |
110 Object[] args | |
111 ) { | |
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112 return getMsg(meta, key, key, args); |
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113 } |
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114 |
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115 /** |
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116 * Returns a translated message based on a template specified by <i>key</i> |
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117 * that has necessary values to be filled in. |
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118 * |
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119 * @param meta The CallMeta object. |
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120 * @param key The key of the template in the resource bundle. |
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121 * @param def the default value if no template was found with <i>key</i>. |
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122 * @param args The arguments that are necessary for the template. |
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123 * |
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124 * @return a translated string. |
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125 */ |
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126 public static String getMsg( |
3771 | 127 CallMeta meta, |
128 String key, | |
129 String def, | |
130 Object[] args) | |
413
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131 { |
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132 String template = getMsg(meta, key, (String)null); |
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133 |
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134 if (template == null) { |
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135 return def; |
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136 } |
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137 |
3771 | 138 return format(meta, template, args); |
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139 } |
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140 |
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141 public static String format( |
3771 | 142 CallMeta meta, |
143 String key, | |
144 String def, | |
145 Object ... args | |
146 ) { | |
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147 String template = getMsg(meta, key, (String)null); |
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148 |
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149 if (template == null) { |
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150 template = def; |
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151 } |
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152 |
3771 | 153 return format(meta, template, args); |
154 } | |
155 | |
156 /** | |
157 * Formats the given template using the arguments with respect of the | |
158 * appropriate locale given by the CallMeta instance. | |
159 */ | |
160 public static String format(CallMeta meta, String templ, Object ... args) { | |
161 Locale locale = getLocale(meta); | |
162 MessageFormat mf = new MessageFormat(templ, locale); | |
163 | |
164 return mf.format(args, new StringBuffer(), null).toString(); | |
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165 } |
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166 |
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167 /** |
125
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168 * This method returns the translated value for <i>key</i> or <i>def</i> if |
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169 * <i>key</i> is not existing in the resource bundle. |
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170 * |
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171 * @param locale The locale. |
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172 * @param key The key that should be translated. |
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173 * @param def A default value that is returned, if <i>key</i> was not found. |
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174 * |
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175 * @return the translated message. |
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176 */ |
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177 public static String getMsg(Locale locale, String key, String def) { |
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178 ResourceBundle bundle = ResourceBundle.getBundle("messages", locale); |
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179 |
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180 try { |
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181 return bundle.getString(key); |
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182 } |
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183 catch (MissingResourceException mre) { |
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184 log.warn("No message found for key: " + key); |
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185 |
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186 return def; |
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187 } |
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188 } |
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189 } |
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190 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |