Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/ressource/RessourceFactory.java @ 1115:f953c9a559d8

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Added license file and license headers. gnv-artifacts/trunk@1260 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 02 Nov 2010 17:46:55 +0000
parents 05bf8534a35a
children
rev   line source
1115
f953c9a559d8 Added license file and license headers.
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.artifacts.ressource;
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10
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11 import de.intevation.artifacts.PreferredLocale;
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12
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13 import java.io.BufferedReader;
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14 import java.io.FileNotFoundException;
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15 import java.io.IOException;
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16 import java.io.InputStream;
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17 import java.io.InputStreamReader;
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19 import java.util.ArrayList;
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20 import java.util.List;
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21 import java.util.Locale;
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22 import java.util.MissingResourceException;
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23 import java.util.ResourceBundle;
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24
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25 import org.apache.log4j.Logger;
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26
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27 /**
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28 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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29 *
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30 */
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31 public class RessourceFactory {
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32
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33 /**
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34 * the logger, used to log exceptions and additonaly information
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35 */
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36 private static Logger log = Logger.getLogger(RessourceFactory.class);
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37
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38 /**
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39 * The singleton Instance of this Factory.
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40 */
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41 private static RessourceFactory instance = null;
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42
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43 private static String RESSOURCE_BASE_ID = "artifact.ressource.dir";
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44
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45 private static String ressourceName = "artifactMessages";
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46 private static String DEFAULT_DIR = "lang";
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47 private static String LANG_CONFIG_FILE = "lang.conf";
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48
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49 private String ressourceDir = null;
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51 private Locale[] locales = null;
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52
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53 /**
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54 * Basic-Constructor of this Class
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55 */
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56 private RessourceFactory() {
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57 super();
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58 ressourceDir = System.getProperty(RESSOURCE_BASE_ID, DEFAULT_DIR);
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59 }
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60
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61 /**
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62 * This Method provides an singleton Instance of this Class.
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63 *
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64 * @return an singleton Instance of this Class
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65 */
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66 public static synchronized RessourceFactory getInstance() {
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67 if (instance == null) {
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68 instance = new RessourceFactory();
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69 }
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70 return instance;
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71 }
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74 /**
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75 * This method reads locales, configured in LANG_CONFIG_FILE, from
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76 * filesystem and returns them as array.
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77 *
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78 * @return Array of locales supported by the the server.
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79 */
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80 public Locale[] getLocales() {
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81
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82 if (locales != null)
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83 return locales;
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84
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85 log.debug("Supported locales have not been read - read now.");
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86 try {
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87 String config = "/" + ressourceDir + "/" + LANG_CONFIG_FILE;
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88 InputStream in = RessourceFactory.class.getResourceAsStream(config);
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89
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90 BufferedReader reader = new BufferedReader(
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91 new InputStreamReader(in)
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92 );
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93
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94 String line = null;
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95 String country = null;
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96 String language = null;
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97 int idx = -1;
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98
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99 List tmpLocales = new ArrayList();
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100
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101 while((line = reader.readLine()) != null) {
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102 // validate if defined locale has a valid length
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103 if (line.length() != 2 && line.length() != 5) {
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104 log.warn("Illegal locale definition found.");
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105 continue;
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106 }
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107
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108 idx = line.indexOf("_");
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109 if (idx > 0) {
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110 // found locale containing language and country code
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111 language = line.substring(0, idx);
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112 country = line.substring(idx+1);
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113 tmpLocales.add(new Locale(language, country));
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114 }
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115 else {
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116 // found locale containing languagey code only
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117 tmpLocales.add(new Locale(line));
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118 }
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119 }
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120
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121 locales = (Locale[]) tmpLocales.toArray(
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122 new Locale[tmpLocales.size()]
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123 );
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124
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125 return locales;
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126 }
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127 catch (FileNotFoundException fnfe) {
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128 log.warn("File not found: " + LANG_CONFIG_FILE, fnfe);
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129 }
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130 catch (IOException ioe) {
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131 log.warn(ioe.getLocalizedMessage(), ioe);
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132 }
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133
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134 return null;
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135 }
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136
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137
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138 /**
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139 * Deliveres the translated Value for an Key to an given Language
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140 *
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141 * @param preferredLocales
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142 * @param key the key
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143 * @param defaultValue the Value that should be returned.
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144 * @return the translated Value
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145 */
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146 public String getRessource(PreferredLocale[] preferredLocales, String key,
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147 String defaultValue) {
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148 if (key == null || preferredLocales.length == 0) {
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149 return defaultValue;
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150 }
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151
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152 return getRessource(preferredLocales[0].getLocale(), key, defaultValue);
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153 }
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154
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155
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156 /**
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157 * Deliveres the language specific value for the given <code>key</code>
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158 *
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159 * @param locale
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160 * @param key
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161 * @param defaultVal
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162 * @return language specific string.
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163 */
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164 public String getRessource(Locale locale, String key, String defaultVal) {
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165 if (key == null || locale == null)
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166 return defaultVal;
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167
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168 try {
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169 ResourceBundle rb = ResourceBundle.getBundle(
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170 ressourceDir + "/" + ressourceName,
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171 locale
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172 );
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173
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174 return rb.getString(key);
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175 }
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176 catch (MissingResourceException mre) {
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177 log.warn("No resource bundle: " + locale.toString(), mre);
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178 return defaultVal;
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179 }
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180 }
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181 }
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182 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org