Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/resources/Resources.java @ 5181:9d36ddf7dbd3

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Change IllegalArgumentException to HibernateException.
author Raimund Renkert <rrenkert@intevation.de>
date Thu, 07 Mar 2013 10:44:27 +0100
parents 04309ca24614
children
rev   line source
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1 package de.intevation.flys.artifacts.resources;
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2
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3 import java.text.MessageFormat;
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4 import java.util.Locale;
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5 import java.util.MissingResourceException;
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6 import java.util.ResourceBundle;
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7
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8 import org.apache.log4j.Logger;
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9
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10 import de.intevation.artifacts.CallMeta;
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11
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12 /**
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13 * This class provides methods for i18n.
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14 *
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15 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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16 */
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17 public class Resources {
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18
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19 /** The logger that is used in this class.*/
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20 private static Logger logger = Logger.getLogger(Resources.class);
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21
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22 /** The singleton instance.*/
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23 private static Resources INSTANCE;
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24
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25 /** The locales supported by this server.*/
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26 protected Locale[] locales;
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27
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28 /**
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29 * No instance of this class is necessary.
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30 */
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31 private Resources() {
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32 }
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33
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34
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35 /**
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36 * Returns the locales supported by this server.
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37 *
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38 * @return the supported locales.
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39 */
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40 public synchronized Locale [] getLocales() {
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41 if (locales == null) {
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42 readLocales();
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43 }
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44
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45 return locales;
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46 }
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47
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48
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49 /**
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50 * Read the locales configured for this server.
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51 */
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52 protected void readLocales() {
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53 // TODO IMPLEMENT ME
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54
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55 locales = new Locale[2];
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56 locales[0] = Locale.GERMANY;
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57 locales[1] = Locale.ENGLISH;
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58 }
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59
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60
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61 private static synchronized void ensureInstance() {
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62 if (INSTANCE == null) {
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63 INSTANCE = new Resources();
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64 }
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65 }
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66
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67
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68 public static Locale getLocale(CallMeta meta) {
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69 ensureInstance();
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70
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71 Locale[] locales = INSTANCE.getLocales();
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72 return meta.getPreferredLocale(locales);
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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 * This method returns the translated value for <i>key</i> or <i>def</i> if
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78 * <i>key</i> is not existing in the resource bundle.
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79 *
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80 * @param meta The CallMeta object of the request that contains the
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81 * preferred locale.
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82 * @param key The key that should be translated.
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83 * @param def A default value that is returned, if <i>key</i> was not found.
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84 *
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85 * @return the translated message.
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86 */
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87 public static String getMsg(CallMeta meta, String key, String def) {
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88 ensureInstance();
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89
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90 Locale[] locales = INSTANCE.getLocales();
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91 Locale locale = meta.getPreferredLocale(locales);
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92
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93 return getMsg(locale, key, def);
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94 }
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95
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96 public static String getMsg(
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97 CallMeta meta,
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98 String key,
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99 Object[] args
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100 ) {
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101 return getMsg(meta, key, key, args);
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102 }
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103
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104 /**
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105 * Returns a translated message based on a template specified by <i>key</i>
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106 * that has necessary values to be filled in.
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107 *
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108 * @param meta The CallMeta object.
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109 * @param key The key of the template in the resource bundle.
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110 * @param def the default value if no template was found with <i>key</i>.
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111 * @param args The arguments that are necessary for the template.
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112 *
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113 * @return a translated string.
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114 */
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115 public static String getMsg(
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116 CallMeta meta,
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117 String key,
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118 String def,
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119 Object[] args)
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120 {
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121 String template = getMsg(meta, key, (String)null);
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122
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123 if (template == null) {
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124 return def;
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125 }
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126
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127 return format(meta, template, args);
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128 }
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129
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130 public static String format(
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131 CallMeta meta,
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132 String key,
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133 String def,
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134 Object ... args
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135 ) {
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136 String template = getMsg(meta, key, (String)null);
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137
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138 if (template == null) {
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139 template = def;
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140 }
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141
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142 return format(meta, template, args);
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143 }
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144
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145 /**
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146 * Formats the given template using the arguments with respect of the
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147 * appropriate locale given by the CallMeta instance.
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148 */
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149 public static String format(CallMeta meta, String templ, Object ... args) {
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150 Locale locale = getLocale(meta);
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151 MessageFormat mf = new MessageFormat(templ, locale);
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152
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153 return mf.format(args, new StringBuffer(), null).toString();
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154 }
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155
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156 /**
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157 * This method returns the translated value for <i>key</i> or <i>def</i> if
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158 * <i>key</i> is not existing in the resource bundle.
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159 *
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160 * @param locale The locale.
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161 * @param key The key that should be translated.
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162 * @param def A default value that is returned, if <i>key</i> was not found.
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163 *
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164 * @return the translated message.
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165 */
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166 public static String getMsg(Locale locale, String key, String def) {
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167 ResourceBundle bundle = ResourceBundle.getBundle("messages", locale);
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168
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169 try {
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170 return bundle.getString(key);
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171 }
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172 catch (MissingResourceException mre) {
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173 logger.warn("No message found for key: " + key);
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174
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175 return def;
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176 }
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177 }
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178 }
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179 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org