Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/resources/Resources.java @ 8202:e4606eae8ea5

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sed src/**/*.java 's/logger/log/g'
author Sascha L. Teichmann <teichmann@intevation.de>
date Fri, 05 Sep 2014 12:58:17 +0200
parents af13ceeba52a
children 1cd7225df846
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
125
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84 /**
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85 * This method returns the translated value for <i>key</i> or <i>def</i> if
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86 * <i>key</i> is not existing in the resource bundle.
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87 *
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88 * @param meta The CallMeta object of the request that contains the
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89 * preferred locale.
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90 * @param key The key that should be translated.
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91 * @param def A default value that is returned, if <i>key</i> was not found.
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92 *
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93 * @return the translated message.
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94 */
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95 public static String getMsg(CallMeta meta, String key, String def) {
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96 ensureInstance();
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97
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98 Locale[] locales = INSTANCE.getLocales();
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99 Locale locale = meta.getPreferredLocale(locales);
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100
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101 return getMsg(locale, key, def);
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102 }
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103
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104 public static String getMsg(
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105 CallMeta meta,
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106 String key,
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107 Object[] args
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108 ) {
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109 return getMsg(meta, key, key, args);
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110 }
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111
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112 /**
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113 * Returns a translated message based on a template specified by <i>key</i>
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114 * that has necessary values to be filled in.
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115 *
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116 * @param meta The CallMeta object.
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117 * @param key The key of the template in the resource bundle.
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118 * @param def the default value if no template was found with <i>key</i>.
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119 * @param args The arguments that are necessary for the template.
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120 *
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121 * @return a translated string.
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122 */
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123 public static String getMsg(
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124 CallMeta meta,
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125 String key,
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126 String def,
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127 Object[] args)
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128 {
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129 String template = getMsg(meta, key, (String)null);
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130
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131 if (template == null) {
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132 return def;
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133 }
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134
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135 return format(meta, template, args);
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136 }
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137
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138 public static String format(
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139 CallMeta meta,
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140 String key,
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141 String def,
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142 Object ... args
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143 ) {
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144 String template = getMsg(meta, key, (String)null);
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145
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146 if (template == null) {
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147 template = def;
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148 }
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149
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150 return format(meta, template, args);
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151 }
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152
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153 /**
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154 * Formats the given template using the arguments with respect of the
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155 * appropriate locale given by the CallMeta instance.
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156 */
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157 public static String format(CallMeta meta, String templ, Object ... args) {
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158 Locale locale = getLocale(meta);
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159 MessageFormat mf = new MessageFormat(templ, locale);
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160
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161 return mf.format(args, new StringBuffer(), null).toString();
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162 }
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163
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164 /**
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165 * This method returns the translated value for <i>key</i> or <i>def</i> if
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166 * <i>key</i> is not existing in the resource bundle.
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167 *
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168 * @param locale The locale.
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169 * @param key The key that should be translated.
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170 * @param def A default value that is returned, if <i>key</i> was not found.
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171 *
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172 * @return the translated message.
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173 */
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174 public static String getMsg(Locale locale, String key, String def) {
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175 ResourceBundle bundle = ResourceBundle.getBundle("messages", locale);
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176
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177 try {
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178 return bundle.getString(key);
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179 }
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180 catch (MissingResourceException mre) {
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181 log.warn("No message found for key: " + key);
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182
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183 return def;
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184 }
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185 }
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186 }
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187 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org