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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/resources/Resources.java @ 413:8a4c219fd0ee

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Added a method to Resources that returns translated compound messages. flys-artifacts/trunk@1877 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 10 May 2011 11:40:15 +0000
parents 25593857b8f8
children e0fec407a280
rev   line source
125
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1 package de.intevation.flys.artifacts.resources;
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2
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3 import java.text.MessageFormat;
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4 import java.util.Locale;
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5 import java.util.MissingResourceException;
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6 import java.util.ResourceBundle;
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7
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8 import org.apache.log4j.Logger;
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9
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10 import de.intevation.artifacts.CallMeta;
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11
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12 /**
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13 * This class provides methods for i18n.
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14 *
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15 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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16 */
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17 public class Resources {
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18
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19 /** The logger that is used in this class.*/
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20 private static Logger logger = Logger.getLogger(Resources.class);
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21
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22 /** The singleton instance.*/
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23 private static Resources INSTANCE;
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24
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25 /** The locales supported by this server.*/
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26 protected Locale[] locales;
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27
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28 /**
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29 * No instance of this class is necessary.
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30 */
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31 private Resources() {
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32 }
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33
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34
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35 /**
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36 * Returns the locales supported by this server.
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37 *
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38 * @return the supported locales.
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39 */
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40 public Locale[] getLocales() {
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41 if (locales == null) {
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42 readLocales();
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43 }
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44
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45 return locales;
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46 }
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47
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48
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49 /**
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50 * Read the locales configured for this server.
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51 */
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52 protected void readLocales() {
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53 // TODO IMPLEMENT ME
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54
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55 locales = new Locale[2];
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56 locales[0] = Locale.GERMANY;
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57 locales[1] = Locale.ENGLISH;
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58 }
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59
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60
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61 /**
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62 * This method returns the translated value for <i>key</i> or <i>def</i> if
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63 * <i>key</i> is not existing in the resource bundle.
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64 *
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65 * @param meta The CallMeta object of the request that contains the
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66 * preferred locale.
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67 * @param key The key that should be translated.
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68 * @param def A default value that is returned, if <i>key</i> was not found.
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69 *
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70 * @return the translated message.
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71 */
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72 public static String getMsg(CallMeta meta, String key, String def) {
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73 if (INSTANCE == null) {
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74 INSTANCE = new Resources();
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75 }
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76
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77 Locale[] locales = INSTANCE.getLocales();
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78 Locale locale = meta.getPreferredLocale(locales);
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79
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80 return getMsg(locale, key, def);
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81 }
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82
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83
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84 /**
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85 * Returns a translated message based on a template specified by <i>key</i>
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86 * that has necessary values to be filled in.
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87 *
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88 * @param meta The CallMeta object.
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89 * @param key The key of the template in the resource bundle.
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90 * @param def the default value if no template was found with <i>key</i>.
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91 * @param args The arguments that are necessary for the template.
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92 *
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93 * @return a translated string.
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94 */
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95 public static String getMsg(
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96 CallMeta meta,
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97 String key,
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98 String def,
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99 Object[] args)
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100 {
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101 String template = getMsg(meta, key, null);
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102
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103 if (template == null) {
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104 return def;
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105 }
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106
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107 return MessageFormat.format(template, args);
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108 }
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109
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110
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111 /**
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112 * This method returns the translated value for <i>key</i> or <i>def</i> if
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113 * <i>key</i> is not existing in the resource bundle.
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114 *
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115 * @param locale The locale.
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116 * @param key The key that should be translated.
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117 * @param def A default value that is returned, if <i>key</i> was not found.
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118 *
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119 * @return the translated message.
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120 */
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121 public static String getMsg(Locale locale, String key, String def) {
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122 ResourceBundle bundle = ResourceBundle.getBundle("messages", locale);
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123
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124 try {
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125 return bundle.getString(key);
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126 }
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127 catch (MissingResourceException mre) {
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128 logger.warn("No message found for key: " + key);
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129
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130 return def;
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diff changeset
131 }
25593857b8f8 Implemented a singleton instance that provides i18n strings.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
132 }
25593857b8f8 Implemented a singleton instance that provides i18n strings.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
133 }
25593857b8f8 Implemented a singleton instance that provides i18n strings.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
134 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org