package org.apidesign.aserverinfo;

 import java.net.URL;

 import java.util.concurrent.Callable;

 import org.openide.util.Lookup;

 public final class AServerInfo {

     private final Callable<String> name;

     private final Callable<URL> url;

     private final Callable<Void> reset;

     private final Callable<Void> shutdown;

     private AServerInfo(Callable<String> name, Callable<URL> url, Callable<Void> reset, Callable<Void> s) {

         this.name = name;

         this.url = url;

         this.reset = reset;

         this.shutdown = s;

     }

     //

     // API for clients

     //

     public String getName() {

         return call(name, "noname");

     }

     public URL getURL() {

         return call(url, null);

     }

     public void reset() throws Exception {

         if (reset != null) {

             reset.call();

         }

     }

     public void shutdown() throws Exception {

         if (shutdown != null) {

             shutdown.call();

         }

     }

     //

     // factories

     //

     // BEGIN: aserverinfo.create

     public interface NameProvider {

         public String getName();

     }

     public interface URLProvider {

         public URL getURL();

     }

     public interface ResetHandler {

         public void reset();

     }

     public static AServerInfo create(final Lookup interfaces) 

     // END: aserverinfo.create

     {

         Callable<String> nameP = new Callable<String>() {

             public String call() throws Exception {

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

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

             }

         };

         Callable<URL> urlP = new Callable<URL>() {

             public URL call() throws Exception {

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

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

             }

         };

         Callable<Void> resetP = new Callable<Void>() {

             public Void call() throws Exception {

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

                 if (h != null) {

                     h.reset();

                 }

                 return null;

             }

         };

         return new AServerInfo(nameP, urlP, resetP, null);

     }

     // BEGIN: aserverinfo.regularcreate

     public static AServerInfo create(NameProvider nameProvider, URLProvider urlProvider, ResetHandler reset)

     // END: aserverinfo.regularcreate

     {

         return create(nameProvider, urlProvider, reset, null);

     }

     // BEGIN: aserverinfo.regularcreate.withshutdown

     /** @since 2.0 */

     public interface ShutdownHandler {

         public void shutdown();

     }

     /** @since 2.0 */

     public static AServerInfo create(NameProvider nameProvider, URLProvider urlProvider, ResetHandler reset, ShutdownHandler shutdown)

     // END: aserverinfo.regularcreate.withshutdown

     {

         final NameProvider np = nameProvider;

         final URLProvider up = urlProvider;

         final ResetHandler h = reset;

         final ShutdownHandler s = shutdown;

         Callable<String> nameP = new Callable<String>() {

             public String call() throws Exception {

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

             }

         };

         Callable<URL> urlP = new Callable<URL>() {

             public URL call() throws Exception {

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

             }

         };

         Callable<Void> resetP = new Callable<Void>() {

             public Void call() throws Exception {

                 if (h != null) {

                     h.reset();

                 }

                 return null;

             }

         };

         Callable<Void> shutP = new Callable<Void>() {

             public Void call() throws Exception {

                 if (s != null) {

                     s.shutdown();

                 }

                 return null;

             }

         };

         return new AServerInfo(nameP, urlP, resetP, shutP);

     }

     //

     // cumulative factory methods

     //

     // BEGIN: aserverinfo.cumulative.factory

     public static AServerInfo empty() {

         return new AServerInfo(null, null, null, null);

     }

     public final AServerInfo nameProvider(final NameProvider np) {

         Callable<String> nameP = new Callable<String>() {

             public String call() throws Exception {

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

             }

         };

         return new AServerInfo(nameP, this.url, this.reset, this.shutdown);

     }

     // END: aserverinfo.cumulative.empty

     public final AServerInfo urlProvider(final URLProvider up) {

         Callable<URL> urlP = new Callable<URL>() {

             public URL call() throws Exception {

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

             }

         };

         return new AServerInfo(this.name, urlP, this.reset, this.shutdown);

     }

     public final AServerInfo reset(final ResetHandler h) {

         Callable<Void> resetP = new Callable<Void>() {

             public Void call() throws Exception {

                 if (h != null) {

                     h.reset();

                 }

                 return null;

             }

         };

         return new AServerInfo(this.name, this.url, resetP, this.shutdown);

     }

     public final AServerInfo shutdown(final ShutdownHandler s) {

         Callable<Void> shutP = new Callable<Void>() {

             public Void call() throws Exception {

                 if (s != null) {

                     s.shutdown();

                 }

                 return null;

             }

         };

         return new AServerInfo(this.name, this.url, this.reset, shutP);

     }

     //

     // Support implementations

     //

     private static <T> T call(Callable<T> name, T defValue) {

         try {

             return name.call();

         } catch (Exception ex) {

             return defValue;

         }

     }

 }