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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/resources/Resources.java @ 125:25593857b8f8

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Implemented a singleton instance that provides i18n strings. flys-artifacts/trunk@1461 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 14 Mar 2011 14:16:37 +0000
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children 8a4c219fd0ee
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125
25593857b8f8 Implemented a singleton instance that provides i18n strings.
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1 package de.intevation.flys.artifacts.resources;
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2
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3 import java.util.Locale;
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4 import java.util.MissingResourceException;
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5 import java.util.ResourceBundle;
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6
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7 import org.apache.log4j.Logger;
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8
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9 import de.intevation.artifacts.CallMeta;
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10
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11 /**
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12 * This class provides methods for i18n.
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13 *
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14 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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15 */
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16 public class Resources {
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17
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18 /** The logger that is used in this class.*/
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19 private static Logger logger = Logger.getLogger(Resources.class);
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20
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21 /** The singleton instance.*/
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22 private static Resources INSTANCE;
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23
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24 /** The locales supported by this server.*/
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25 protected Locale[] locales;
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26
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27 /**
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28 * No instance of this class is necessary.
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29 */
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30 private Resources() {
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31 }
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32
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33
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34 /**
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35 * Returns the locales supported by this server.
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36 *
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37 * @return the supported locales.
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38 */
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39 public Locale[] getLocales() {
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40 if (locales == null) {
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41 readLocales();
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42 }
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43
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44 return locales;
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45 }
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46
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47
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48 /**
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49 * Read the locales configured for this server.
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50 */
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51 protected void readLocales() {
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52 // TODO IMPLEMENT ME
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53
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54 locales = new Locale[2];
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55 locales[0] = Locale.GERMANY;
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56 locales[1] = Locale.ENGLISH;
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57 }
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58
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59
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60 /**
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61 * This method returns the translated value for <i>key</i> or <i>def</i> if
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62 * <i>key</i> is not existing in the resource bundle.
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63 *
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64 * @param meta The CallMeta object of the request that contains the
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65 * preferred locale.
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66 * @param key The key that should be translated.
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67 * @param def A default value that is returned, if <i>key</i> was not found.
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68 *
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69 * @return the translated message.
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70 */
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71 public static String getMsg(CallMeta meta, String key, String def) {
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72 if (INSTANCE == null) {
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73 INSTANCE = new Resources();
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74 }
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75
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76 Locale[] locales = INSTANCE.getLocales();
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77 Locale locale = meta.getPreferredLocale(locales);
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78
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79 return getMsg(locale, key, def);
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80 }
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81
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82
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83 /**
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84 * This method returns the translated value for <i>key</i> or <i>def</i> if
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85 * <i>key</i> is not existing in the resource bundle.
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86 *
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87 * @param locale The locale.
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88 * @param key The key that should be translated.
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89 * @param def A default value that is returned, if <i>key</i> was not found.
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90 *
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91 * @return the translated message.
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92 */
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93 public static String getMsg(Locale locale, String key, String def) {
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94 ResourceBundle bundle = ResourceBundle.getBundle("messages", locale);
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95
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96 try {
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97 return bundle.getString(key);
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98 }
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99 catch (MissingResourceException mre) {
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100 logger.warn("No message found for key: " + key);
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101
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102 return def;
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103 }
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104 }
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105 }
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106 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org