tim@117: /**
tim@117:  *
tim@117:  */
tim@117: package de.intevation.gnv.artifacts.ressource;
tim@117: 
tim@123: import java.util.MissingResourceException;
tim@117: import java.util.ResourceBundle;
tim@117: 
tim@117: import org.apache.log4j.Logger;
tim@117: 
tim@118: import de.intevation.artifacts.PreferredLocale;
tim@118: 
tim@117: /**
tim@117:  * @author Tim Englich <tim.englich@intevation.de>
tim@171:  * 
tim@117:  */
tim@117: public class RessourceFactory {
tim@117: 
tim@117:     /**
tim@117:      * the logger, used to log exceptions and additonaly information
tim@117:      */
tim@117:     private static Logger log = Logger.getLogger(RessourceFactory.class);
tim@171: 
tim@117:     /**
tim@117:      * The singleton Instance of this Factory.
tim@117:      */
tim@117:     private static RessourceFactory instance = null;
tim@117: 
tim@117:     private static String RESSOURCE_BASE_ID = "artifact.ressource.dir";
tim@171: 
tim@117:     private static String ressourceName = "artifactMessages";
tim@171:     private static String DEFAULT_DIR = "lang";
tim@171: 
tim@117:     private String ressourceDir = null;
tim@118: 
tim@117:     /**
tim@117:      * Basic-Constructor of this Class
tim@117:      */
tim@117:     private RessourceFactory() {
tim@117:         super();
sascha@121:         ressourceDir = System.getProperty(RESSOURCE_BASE_ID, DEFAULT_DIR);
tim@117:     }
tim@117: 
tim@117:     /**
tim@117:      * This Method provides an singleton Instance of this Class.
tim@171:      * 
tim@117:      * @return an singleton Instance of this Class
tim@117:      */
tim@171:     public static synchronized RessourceFactory getInstance() {
tim@171:         if (instance == null) {
tim@117:             instance = new RessourceFactory();
tim@117:         }
tim@117:         return instance;
tim@117:     }
tim@171: 
tim@117:     /**
tim@117:      * Deliveres the translated Value for an Key to an given Language
tim@171:      * 
tim@171:      * @param locale
tim@171:      *            The choosen locale
tim@171:      * @param key
tim@171:      *            the key
tim@171:      * @param defaultValue
tim@171:      *            the Value that should be returned.
tim@117:      * @return the translated Value
tim@117:      */
tim@171:     public String getRessource(PreferredLocale[] preferredLocales, String key,
tim@171:                                String defaultValue) {
sascha@121:         if (key == null || preferredLocales.length == 0) {
sascha@121:             return defaultValue;
sascha@121:         }
sascha@121: 
tim@117:         try {
tim@171:             ResourceBundle rb = ResourceBundle.getBundle(ressourceDir + "/"
tim@171:                                                          + ressourceName,
tim@171:                     preferredLocales[0].getLocale());
sascha@121: 
tim@117:             return rb.getString(key);
tim@171:         } catch (MissingResourceException mre) {
sascha@121:             log.warn(mre.getLocalizedMessage());
tim@117:             return defaultValue;
tim@117:         }
tim@117:     }
tim@117: }