Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/ressource/RessourceFactory.java @ 324:e6e172a4915e

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Removed needless imports. gnv-artifacts/trunk@387 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 30 Nov 2009 15:08:47 +0000
parents 7b4e2f80cba2
children 1c427acb6c76
rev   line source
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1 /**
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2 *
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3 */
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4 package de.intevation.gnv.artifacts.ressource;
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5
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6 import java.io.BufferedReader;
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7 import java.io.File;
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8 import java.io.FileNotFoundException;
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9 import java.io.InputStream;
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10 import java.io.InputStreamReader;
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11 import java.io.IOException;
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12 import java.util.ArrayList;
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13 import java.util.Locale;
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14 import java.util.List;
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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 import de.intevation.artifacts.PreferredLocale;
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21
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22 /**
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23 * @author Tim Englich <tim.englich@intevation.de>
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24 *
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25 */
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26 public class RessourceFactory {
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27
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28 /**
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29 * the logger, used to log exceptions and additonaly information
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30 */
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31 private static Logger log = Logger.getLogger(RessourceFactory.class);
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32
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33 /**
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34 * The singleton Instance of this Factory.
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35 */
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36 private static RessourceFactory instance = null;
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37
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38 private static String RESSOURCE_BASE_ID = "artifact.ressource.dir";
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39
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40 private static String ressourceName = "artifactMessages";
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41 private static String DEFAULT_DIR = "lang";
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42 private static String LANG_CONFIG_FILE = "lang.conf";
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43
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44 private String ressourceDir = null;
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46 private Locale[] locales = null;
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47
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48 /**
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49 * Basic-Constructor of this Class
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50 */
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51 private RessourceFactory() {
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52 super();
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53 ressourceDir = System.getProperty(RESSOURCE_BASE_ID, DEFAULT_DIR);
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54 }
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55
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56 /**
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57 * This Method provides an singleton Instance of this Class.
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58 *
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59 * @return an singleton Instance of this Class
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60 */
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61 public static synchronized RessourceFactory getInstance() {
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62 if (instance == null) {
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63 instance = new RessourceFactory();
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64 }
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65 return instance;
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66 }
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69 /**
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70 * This method reads locales, configured in LANG_CONFIG_FILE, from
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71 * filesystem and returns them as array.
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72 *
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73 * @return Array of locales supported by the the server.
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74 */
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75 public Locale[] getLocales() {
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76
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77 if (locales != null)
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78 return locales;
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79
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80 log.debug("Supported locales have not been read - read now.");
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81 try {
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82 String config = "/" + ressourceDir + "/" + LANG_CONFIG_FILE;
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83 InputStream in = RessourceFactory.class.getResourceAsStream(config);
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84
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85 BufferedReader reader = new BufferedReader(
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86 new InputStreamReader(in)
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87 );
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88
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89 String line = null;
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90 String country = null;
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91 String language = null;
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92 int idx = -1;
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93
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94 List tmpLocales = new ArrayList();
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95
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96 while((line = reader.readLine()) != null) {
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97 // validate if defined locale has a valid length
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98 if (line.length() != 2 && line.length() != 5) {
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99 log.warn("Illegal locale definition found.");
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100 continue;
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101 }
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102
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103 idx = line.indexOf("_");
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104 if (idx > 0) {
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105 // found locale containing language and country code
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106 language = line.substring(0, idx);
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107 country = line.substring(idx+1);
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108 tmpLocales.add(new Locale(language, country));
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109 }
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110 else {
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111 // found locale containing languagey code only
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112 tmpLocales.add(new Locale(line));
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113 }
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114 }
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115
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116 locales = (Locale[]) tmpLocales.toArray(
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117 new Locale[tmpLocales.size()]
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118 );
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119
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120 return locales;
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121 }
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122 catch (FileNotFoundException fnfe) {
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123 log.warn("File not found: " + LANG_CONFIG_FILE, fnfe);
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124 }
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125 catch (IOException ioe) {
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126 log.warn(ioe.getLocalizedMessage(), ioe);
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127 }
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128
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129 return null;
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130 }
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131
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132
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133 /**
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134 * Deliveres the translated Value for an Key to an given Language
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135 *
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136 * @param locale
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137 * The choosen locale
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138 * @param key
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139 * the key
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140 * @param defaultValue
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141 * the Value that should be returned.
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142 * @return the translated Value
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143 */
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144 public String getRessource(PreferredLocale[] preferredLocales, String key,
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145 String defaultValue) {
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146 if (key == null || preferredLocales.length == 0) {
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147 return defaultValue;
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148 }
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149
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150 try {
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151 ResourceBundle rb = ResourceBundle.getBundle(ressourceDir + "/"
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152 + ressourceName,
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153 preferredLocales[0].getLocale());
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154
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155 return rb.getString(key);
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156 } catch (MissingResourceException mre) {
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157 log.warn(mre.getLocalizedMessage());
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158 return defaultValue;
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159 }
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160 }
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161 }
http://dive4elements.wald.intevation.org