teichmann@5861: /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
teichmann@5861:  * Software engineering by Intevation GmbH
teichmann@5861:  *
teichmann@5861:  * This file is Free Software under the GNU AGPL (>=v3) 
teichmann@5861:  * and comes with ABSOLUTELY NO WARRANTY! Check out the
teichmann@5861:  * documentation coming with Dive4Elements River for details. 
teichmann@5861:  */
teichmann@5861: 
teichmann@5835: package org.dive4elements.river.client.client;
ingo@9: 
ingo@229: import com.google.gwt.i18n.client.LocaleInfo;
ingo@229: 
ingo@9: import com.google.gwt.xml.client.Document;
ingo@9: import com.google.gwt.xml.client.Node;
ingo@9: 
ingo@9: 
ingo@9: /**
ingo@9:  * A class that is used to handle the global configuration of this client. You
ingo@9:  * can retrieve an instance of this class using the <code>getInstance</code>
ingo@9:  * methods. <b>NOTE:</b> the configuration is initialized using {@link
ingo@9:  * getInstance(Document)} the first time.
ingo@9:  *
ingo@9:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@9:  */
ingo@9: public class Config {
ingo@9: 
ingo@9:     /** The instance of the configuration. */
ingo@9:     protected static Config INSTANCE;
ingo@9: 
felix@1347:     /** The xml document that contains the configuration options. */
ingo@9:     protected Document config;
ingo@9: 
ingo@9: 
ingo@9:     /**
ingo@9:      * Get an instance by using {@link getInstance(Document)} or {@link
ingo@9:      * getInstance()}.
ingo@9:      */
ingo@9:     private Config(Document config) {
ingo@9:         this.config = config;
ingo@9:     }
ingo@9: 
ingo@9: 
ingo@9:     /**
ingo@9:      * Returns an instance of this class and initializes the configuration of
ingo@9:      * this has not been done so far.
ingo@9:      *
ingo@9:      * @param config The client configuration.
ingo@9:      *
ingo@9:      * @return an instance of this Config class.
ingo@9:      */
ingo@9:     public static Config getInstance(Document config) {
ingo@9:         if (INSTANCE == null) {
ingo@9:             INSTANCE = new Config(config);
ingo@9:         }
ingo@9: 
ingo@9:         return INSTANCE;
ingo@9:     }
ingo@9: 
ingo@9: 
ingo@9:     /**
ingo@9:      * Returns an instance of this class. If it has not been initialized with a
ingo@9:      * valid configuration, null is returned.
ingo@9:      *
ingo@9:      * @return an instance of this class or null, if the Config has not been
ingo@9:      * initialized using {@link getInstance(Document)} so far.
ingo@9:      */
ingo@9:     public static Config getInstance() {
ingo@9:         return INSTANCE;
ingo@9:     }
ingo@9: 
ingo@9: 
ingo@9:     /**
ingo@9:      * Returns the URL of the artifact server.
ingo@9:      *
ingo@9:      * @return the artifact server url.
ingo@9:      */
ingo@9:     public String getServerUrl() {
ingo@9:         Node server = config.getElementsByTagName("server").item(0);
ingo@9:         return server.getFirstChild().getNodeValue();
ingo@9:     }
ingo@229: 
ingo@229: 
ingo@229:     /**
ingo@229:      * Returns the name of the current locale.
ingo@229:      *
ingo@229:      * @return the name of the current locale.
ingo@229:      */
ingo@229:     public String getLocale() {
ingo@229:         return LocaleInfo.getCurrentLocale().getLocaleName();
ingo@229:     }
ingo@585: 
ingo@585: 
ingo@585:     /**
ingo@585:      * Returns the integer configured at
ingo@585:      * <i>/config/projectlist/update-interval/text()</i> or -1 if an error
ingo@585:      * occured or no such option is defined.
ingo@585:      *
ingo@585:      * @return the update interval of the project list.
ingo@585:      */
ingo@585:     public int getProjectListUpdateInterval() {
ingo@585:         Node projectlist = config.getElementsByTagName("projectlist").item(0);
ingo@585: 
ingo@585:         if (projectlist == null) {
ingo@585:             return -1;
ingo@585:         }
ingo@585: 
ingo@585:         Node interval = config.getElementsByTagName("update-interval").item(0);
ingo@585: 
ingo@585:         if (interval == null) {
ingo@585:             return -1;
ingo@585:         }
ingo@585: 
ingo@585:         String value = interval.getFirstChild().getNodeValue();
ingo@585: 
ingo@585:         return value != null ? Integer.valueOf(value) : -1;
ingo@585:     }
ingo@9: }
ingo@9: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :