package org.apidesign.aserverinfo.magicalbagfactory;

 import java.net.URL;

 import org.apidesign.aserverinfo.spi.NameProvider;

 import org.apidesign.aserverinfo.spi.ResetHandler;

 import org.apidesign.aserverinfo.spi.ShutdownHandler;

 import org.apidesign.aserverinfo.spi.URLProvider;

 import org.openide.util.Lookup;

 /** A class to connect to server, identify it and manipulate with

  * it state. The <a href="http://apidesign.org">Practical API Design</a>

  * book used to call it AServerInfo.

  * <p>

  */

 public final class ServerConnector {

     public String getName() {

         return name == null ? "noname" : name.getName();

     }

     public URL getURL() {

         return url == null ? null : url.getURL();

     }

     public void reset() {

         if (reset != null) {

             reset.reset();

         }

     }

     /** Additional method for API clients not available from first version.

      * @since 2.0

      */

     public void shutdown() {

         if (shutdown != null) {

             shutdown.shutdown();

         }

     }

     //

     // private part

     //

     private final NameProvider name;

     private final URLProvider url;

     private final ResetHandler reset;

     private final ShutdownHandler shutdown;

     private ServerConnector(

         NameProvider name, URLProvider url,

         ResetHandler reset, ShutdownHandler shutdown

     ) {

         this.name = name;

         this.url = url;

         this.reset = reset;

         this.shutdown = shutdown;

     }

     // BEGIN: aserverinfo.magicalbag.create

     public static ServerConnector create(final Lookup interfaces) {

         NameProvider nameP = new NameProvider() {

             public String getName() {

                 NameProvider p = interfaces.lookup(NameProvider.class);

                 return p == null ? "noname" : p.getName();

             }

         };

         URLProvider urlP = new URLProvider() {

             public URL getURL() {

                 URLProvider p = interfaces.lookup(URLProvider.class);

                 return p == null ? null : p.getURL();

             }

         };

         ResetHandler resetP = new ResetHandler() {

             public void reset() {

                 ResetHandler h = interfaces.lookup(ResetHandler.class);

                 if (h != null) {

                     h.reset();

                 }

             }

         };

         // code present since version 2.0

         ShutdownHandler shutH = new ShutdownHandler() {

             public void shutdown() {

                 ShutdownHandler h = interfaces.lookup(ShutdownHandler.class);

                 if (h != null) {

                     h.shutdown();

                 }

             }

         };

         return new ServerConnector(nameP, urlP, resetP, shutH);

     }

     // END: aserverinfo.magicalbag.create

 }