Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/resources/Resources.java @ 125:25593857b8f8
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 |
| parents | |
| children | 8a4c219fd0ee |
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| 124:b7a9557957d1 | 125:25593857b8f8 |
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| 1 package de.intevation.flys.artifacts.resources; | |
| 2 | |
| 3 import java.util.Locale; | |
| 4 import java.util.MissingResourceException; | |
| 5 import java.util.ResourceBundle; | |
| 6 | |
| 7 import org.apache.log4j.Logger; | |
| 8 | |
| 9 import de.intevation.artifacts.CallMeta; | |
| 10 | |
| 11 /** | |
| 12 * This class provides methods for i18n. | |
| 13 * | |
| 14 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 15 */ | |
| 16 public class Resources { | |
| 17 | |
| 18 /** The logger that is used in this class.*/ | |
| 19 private static Logger logger = Logger.getLogger(Resources.class); | |
| 20 | |
| 21 /** The singleton instance.*/ | |
| 22 private static Resources INSTANCE; | |
| 23 | |
| 24 /** The locales supported by this server.*/ | |
| 25 protected Locale[] locales; | |
| 26 | |
| 27 /** | |
| 28 * No instance of this class is necessary. | |
| 29 */ | |
| 30 private Resources() { | |
| 31 } | |
| 32 | |
| 33 | |
| 34 /** | |
| 35 * Returns the locales supported by this server. | |
| 36 * | |
| 37 * @return the supported locales. | |
| 38 */ | |
| 39 public Locale[] getLocales() { | |
| 40 if (locales == null) { | |
| 41 readLocales(); | |
| 42 } | |
| 43 | |
| 44 return locales; | |
| 45 } | |
| 46 | |
| 47 | |
| 48 /** | |
| 49 * Read the locales configured for this server. | |
| 50 */ | |
| 51 protected void readLocales() { | |
| 52 // TODO IMPLEMENT ME | |
| 53 | |
| 54 locales = new Locale[2]; | |
| 55 locales[0] = Locale.GERMANY; | |
| 56 locales[1] = Locale.ENGLISH; | |
| 57 } | |
| 58 | |
| 59 | |
| 60 /** | |
| 61 * This method returns the translated value for <i>key</i> or <i>def</i> if | |
| 62 * <i>key</i> is not existing in the resource bundle. | |
| 63 * | |
| 64 * @param meta The CallMeta object of the request that contains the | |
| 65 * preferred locale. | |
| 66 * @param key The key that should be translated. | |
| 67 * @param def A default value that is returned, if <i>key</i> was not found. | |
| 68 * | |
| 69 * @return the translated message. | |
| 70 */ | |
| 71 public static String getMsg(CallMeta meta, String key, String def) { | |
| 72 if (INSTANCE == null) { | |
| 73 INSTANCE = new Resources(); | |
| 74 } | |
| 75 | |
| 76 Locale[] locales = INSTANCE.getLocales(); | |
| 77 Locale locale = meta.getPreferredLocale(locales); | |
| 78 | |
| 79 return getMsg(locale, key, def); | |
| 80 } | |
| 81 | |
| 82 | |
| 83 /** | |
| 84 * This method returns the translated value for <i>key</i> or <i>def</i> if | |
| 85 * <i>key</i> is not existing in the resource bundle. | |
| 86 * | |
| 87 * @param locale The locale. | |
| 88 * @param key The key that should be translated. | |
| 89 * @param def A default value that is returned, if <i>key</i> was not found. | |
| 90 * | |
| 91 * @return the translated message. | |
| 92 */ | |
| 93 public static String getMsg(Locale locale, String key, String def) { | |
| 94 ResourceBundle bundle = ResourceBundle.getBundle("messages", locale); | |
| 95 | |
| 96 try { | |
| 97 return bundle.getString(key); | |
| 98 } | |
| 99 catch (MissingResourceException mre) { | |
| 100 logger.warn("No message found for key: " + key); | |
| 101 | |
| 102 return def; | |
| 103 } | |
| 104 } | |
| 105 } | |
| 106 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |