Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/ressource/RessourceFactory.java @ 792:9b9bf42b7928

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Added and repaired JavaDoc in artifacts package. gnv-artifacts/trunk@874 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 31 Mar 2010 10:52:34 +0000
parents c4156275c1e1
children feae2f9d6c6f
rev   line source
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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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5 import java.io.BufferedReader;
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6 import java.io.FileNotFoundException;
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7 import java.io.IOException;
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8 import java.io.InputStream;
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9 import java.io.InputStreamReader;
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11 import java.util.ArrayList;
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12 import java.util.List;
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13 import java.util.Locale;
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14 import java.util.MissingResourceException;
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15 import java.util.ResourceBundle;
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16
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17 import org.apache.log4j.Logger;
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18
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19 /**
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20 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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21 *
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22 */
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23 public class RessourceFactory {
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24
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25 /**
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26 * the logger, used to log exceptions and additonaly information
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27 */
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28 private static Logger log = Logger.getLogger(RessourceFactory.class);
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29
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30 /**
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31 * The singleton Instance of this Factory.
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32 */
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33 private static RessourceFactory instance = null;
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34
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35 private static String RESSOURCE_BASE_ID = "artifact.ressource.dir";
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37 private static String ressourceName = "artifactMessages";
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38 private static String DEFAULT_DIR = "lang";
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39 private static String LANG_CONFIG_FILE = "lang.conf";
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41 private String ressourceDir = null;
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42
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43 private Locale[] locales = null;
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44
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45 /**
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46 * Basic-Constructor of this Class
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47 */
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48 private RessourceFactory() {
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49 super();
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50 ressourceDir = System.getProperty(RESSOURCE_BASE_ID, DEFAULT_DIR);
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51 }
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52
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53 /**
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54 * This Method provides an singleton Instance of this Class.
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55 *
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56 * @return an singleton Instance of this Class
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57 */
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58 public static synchronized RessourceFactory getInstance() {
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59 if (instance == null) {
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60 instance = new RessourceFactory();
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61 }
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62 return instance;
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63 }
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66 /**
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67 * This method reads locales, configured in LANG_CONFIG_FILE, from
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68 * filesystem and returns them as array.
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69 *
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70 * @return Array of locales supported by the the server.
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71 */
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72 public Locale[] getLocales() {
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74 if (locales != null)
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75 return locales;
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77 log.debug("Supported locales have not been read - read now.");
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78 try {
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79 String config = "/" + ressourceDir + "/" + LANG_CONFIG_FILE;
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80 InputStream in = RessourceFactory.class.getResourceAsStream(config);
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81
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82 BufferedReader reader = new BufferedReader(
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83 new InputStreamReader(in)
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84 );
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85
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86 String line = null;
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87 String country = null;
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88 String language = null;
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89 int idx = -1;
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90
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91 List tmpLocales = new ArrayList();
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92
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93 while((line = reader.readLine()) != null) {
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94 // validate if defined locale has a valid length
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95 if (line.length() != 2 && line.length() != 5) {
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96 log.warn("Illegal locale definition found.");
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97 continue;
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98 }
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99
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100 idx = line.indexOf("_");
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101 if (idx > 0) {
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102 // found locale containing language and country code
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103 language = line.substring(0, idx);
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104 country = line.substring(idx+1);
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105 tmpLocales.add(new Locale(language, country));
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106 }
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107 else {
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108 // found locale containing languagey code only
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109 tmpLocales.add(new Locale(line));
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110 }
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111 }
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112
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113 locales = (Locale[]) tmpLocales.toArray(
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114 new Locale[tmpLocales.size()]
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115 );
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116
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117 return locales;
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118 }
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119 catch (FileNotFoundException fnfe) {
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120 log.warn("File not found: " + LANG_CONFIG_FILE, fnfe);
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121 }
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122 catch (IOException ioe) {
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123 log.warn(ioe.getLocalizedMessage(), ioe);
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124 }
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125
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126 return null;
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127 }
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128
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129
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130 /**
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131 * Deliveres the translated Value for an Key to an given Language
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132 *
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133 * @param preferredLocales
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134 * @param key the key
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135 * @param defaultValue the Value that should be returned.
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136 * @return the translated Value
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137 */
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138 public String getRessource(PreferredLocale[] preferredLocales, String key,
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139 String defaultValue) {
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140 if (key == null || preferredLocales.length == 0) {
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141 return defaultValue;
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142 }
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143
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144 return getRessource(preferredLocales[0].getLocale(), key, defaultValue);
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145 }
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146
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147
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148 /**
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149 * Deliveres the language specific value for the given <code>key</code>
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150 *
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151 * @param locale
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152 * @param key
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153 * @param defaultVal
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154 * @return language specific string.
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155 */
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156 public String getRessource(Locale locale, String key, String defaultVal) {
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157 if (key == null || locale == null)
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158 return defaultVal;
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159
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160 try {
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161 ResourceBundle rb = ResourceBundle.getBundle(
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162 ressourceDir + "/" + ressourceName,
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163 locale
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164 );
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165
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166 return rb.getString(key);
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167 }
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168 catch (MissingResourceException mre) {
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169 log.warn("No resource bundle: " + locale.toString(), mre);
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170 return defaultVal;
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171 }
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172 }
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173 }
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174 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org