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

}