Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/ressource/RessourceFactory.java @ 780:c4156275c1e1
Bring @author javadoc tags in form '@author <a href="john.doe@example.com">John Doe</a>'
gnv-artifacts/trunk@857 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 29 Mar 2010 09:35:44 +0000 |
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children | 9b9bf42b7928 |
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1 package de.intevation.gnv.artifacts.ressource; |
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2 |
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3 import de.intevation.artifacts.PreferredLocale; |
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4 |
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5 import java.io.BufferedReader; |
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6 import java.io.File; |
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7 import java.io.FileNotFoundException; |
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8 import java.io.IOException; |
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9 import java.io.InputStream; |
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10 import java.io.InputStreamReader; |
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11 |
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12 import java.util.ArrayList; |
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13 import java.util.List; |
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14 import java.util.Locale; |
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15 import java.util.MissingResourceException; |
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16 import java.util.ResourceBundle; |
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17 |
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18 import org.apache.log4j.Logger; |
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19 |
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20 /** |
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21 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> |
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22 * |
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23 */ |
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24 public class RessourceFactory { |
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25 |
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26 /** |
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27 * the logger, used to log exceptions and additonaly information |
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28 */ |
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29 private static Logger log = Logger.getLogger(RessourceFactory.class); |
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30 |
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31 /** |
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32 * The singleton Instance of this Factory. |
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33 */ |
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34 private static RessourceFactory instance = null; |
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35 |
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36 private static String RESSOURCE_BASE_ID = "artifact.ressource.dir"; |
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37 |
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38 private static String ressourceName = "artifactMessages"; |
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39 private static String DEFAULT_DIR = "lang"; |
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40 private static String LANG_CONFIG_FILE = "lang.conf"; |
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41 |
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42 private String ressourceDir = null; |
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43 |
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44 private Locale[] locales = null; |
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45 |
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46 /** |
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47 * Basic-Constructor of this Class |
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48 */ |
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49 private RessourceFactory() { |
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50 super(); |
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51 ressourceDir = System.getProperty(RESSOURCE_BASE_ID, DEFAULT_DIR); |
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52 } |
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53 |
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54 /** |
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55 * This Method provides an singleton Instance of this Class. |
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56 * |
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57 * @return an singleton Instance of this Class |
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58 */ |
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59 public static synchronized RessourceFactory getInstance() { |
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60 if (instance == null) { |
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61 instance = new RessourceFactory(); |
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62 } |
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63 return instance; |
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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 * This method reads locales, configured in LANG_CONFIG_FILE, from |
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69 * filesystem and returns them as array. |
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70 * |
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71 * @return Array of locales supported by the the server. |
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72 */ |
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73 public Locale[] getLocales() { |
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74 |
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75 if (locales != null) |
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76 return locales; |
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77 |
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78 log.debug("Supported locales have not been read - read now."); |
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79 try { |
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80 String config = "/" + ressourceDir + "/" + LANG_CONFIG_FILE; |
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81 InputStream in = RessourceFactory.class.getResourceAsStream(config); |
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82 |
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83 BufferedReader reader = new BufferedReader( |
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84 new InputStreamReader(in) |
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85 ); |
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86 |
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87 String line = null; |
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88 String country = null; |
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89 String language = null; |
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90 int idx = -1; |
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91 |
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92 List tmpLocales = new ArrayList(); |
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93 |
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94 while((line = reader.readLine()) != null) { |
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95 // validate if defined locale has a valid length |
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96 if (line.length() != 2 && line.length() != 5) { |
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97 log.warn("Illegal locale definition found."); |
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98 continue; |
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99 } |
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100 |
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101 idx = line.indexOf("_"); |
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102 if (idx > 0) { |
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103 // found locale containing language and country code |
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104 language = line.substring(0, idx); |
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105 country = line.substring(idx+1); |
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106 tmpLocales.add(new Locale(language, country)); |
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107 } |
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108 else { |
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109 // found locale containing languagey code only |
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110 tmpLocales.add(new Locale(line)); |
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111 } |
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112 } |
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113 |
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114 locales = (Locale[]) tmpLocales.toArray( |
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115 new Locale[tmpLocales.size()] |
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116 ); |
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117 |
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118 return locales; |
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119 } |
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120 catch (FileNotFoundException fnfe) { |
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121 log.warn("File not found: " + LANG_CONFIG_FILE, fnfe); |
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122 } |
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123 catch (IOException ioe) { |
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124 log.warn(ioe.getLocalizedMessage(), ioe); |
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125 } |
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126 |
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127 return null; |
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128 } |
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129 |
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130 |
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131 /** |
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132 * Deliveres the translated Value for an Key to an given Language |
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133 * |
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134 * @param locale |
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135 * The choosen locale |
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136 * @param key |
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137 * the key |
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138 * @param defaultValue |
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139 * the Value that should be returned. |
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140 * @return the translated Value |
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141 */ |
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142 public String getRessource(PreferredLocale[] preferredLocales, String key, |
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143 String defaultValue) { |
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144 if (key == null || preferredLocales.length == 0) { |
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145 return defaultValue; |
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146 } |
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147 |
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148 return getRessource(preferredLocales[0].getLocale(), key, defaultValue); |
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149 } |
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150 |
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151 |
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152 public String getRessource(Locale locale, String key, String defaultVal) { |
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153 if (key == null || locale == null) |
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154 return defaultVal; |
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155 |
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156 try { |
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157 ResourceBundle rb = ResourceBundle.getBundle( |
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158 ressourceDir + "/" + ressourceName, |
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159 locale |
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160 ); |
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161 |
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162 return rb.getString(key); |
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163 } |
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164 catch (MissingResourceException mre) { |
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165 log.warn("No resource bundle: " + locale.toString(), mre); |
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166 return defaultVal; |
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167 } |
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168 } |
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169 } |