Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/ressource/RessourceFactory.java @ 779:b1f5f2a8840f

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Ordered imports. Removed needless imports. Removed empty headers. gnv-artifacts/trunk@854 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 29 Mar 2010 08:51:20 +0000
parents 9a828e5a2390
children c4156275c1e1
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.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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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 Tim Englich <tim.englich@intevation.de>
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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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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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42 private String ressourceDir = null;
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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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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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75 if (locales != null)
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76 return locales;
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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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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 }
http://dive4elements.wald.intevation.org