SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package javax.microedition.midlet;

import cc.squirreljme.runtime.cldc.annotation.SquirrelJMEVendorApi;
import cc.squirreljme.runtime.cldc.debug.Debugging;
import cc.squirreljme.runtime.midlet.ApplicationHandler;
import cc.squirreljme.runtime.midlet.ApplicationInterface;
import cc.squirreljme.runtime.midlet.ApplicationType;

/**
 * Interface for MIDlet based applications.
 *
 * @since 2021/11/30
 */
@SquirrelJMEVendorApi
final class __MIDletInterface__
    implements ApplicationInterface<MIDlet>
{
    /** The main entry class. */
    protected final String mainClass;
    
    /**
     * Initializes the MIDlet parameters.
     * 
     * @param __mainClass The main entry class.
     * @throws NullPointerException On null arguments.
     * @since 2021/11/30
     */
    __MIDletInterface__(String __mainClass)
        throws NullPointerException
    {
        if (__mainClass == null)
            throw new NullPointerException("NARG");
        
        this.mainClass = __mainClass;
    }
    
    /**
     * {@inheritDoc}
     * @since 2021/11/30
     */
    @Override
    @SquirrelJMEVendorApi
    public void destroy(MIDlet __instance, Throwable __thrown)
        throws NullPointerException, Throwable
    {
        if (__instance == null)
            throw new NullPointerException("NARG");
        
        // Always try to destroy the MIDlet
        try
        {
            __instance.destroyApp(true);
        }
        catch (MIDletStateChangeException e)
        {
            // Ignore, but still print a trace
            e.printStackTrace(System.err);
        }
        
        // MIDlet is gone now, exit
        __instance.notifyDestroyed();
    }
    
    /**
     * {@inheritDoc}
     * @since 2021/11/30
     */
    @Override
    @SquirrelJMEVendorApi
    public MIDlet newInstance()
        throws Throwable
    {
        // Locate the main class before we initialize it
        String mainClass = this.mainClass;
        Class<?> classType;
        try
        {
            classType = Class.forName(mainClass);
        }
        catch (ClassNotFoundException e)
        {
            /* {@squirreljme.error AD03 Could not find main MIDlet. (Class)} */
            throw new RuntimeException(String.format(
                "AD03 %s", mainClass), e);
        }
        
        // Create instance of the MIDlet
        try
        {
            // Create it
            Object rawInstance = classType.newInstance();
            
            // Catch class casts here because if there is one while the
            // instance is being created it will not be erroneously caught
            try
            {
                return (MIDlet)rawInstance;
            }
            catch (ClassCastException e)
            {
                /* {@squirreljme.error AD05 Class not a MIDlet.} */
                throw new RuntimeException("AD05", e);
            }
        }
        catch (IllegalAccessException|InstantiationException e)
        {
            /* {@squirreljme.error AD04 Could not instantiate class.} */
            throw new RuntimeException("AD04", e);
        }
    }
    
    /**
     * {@inheritDoc}
     * @since 2021/11/30
     */
    @Override
    @SquirrelJMEVendorApi
    public void startApp(MIDlet __instance)
        throws NullPointerException, Throwable
    {
        if (__instance == null)
            throw new NullPointerException("NARG");
        
        __instance.startApp();
    }
    
    /**
     * {@inheritDoc}
     * @since 2022/07/21
     */
    @Override
    @SquirrelJMEVendorApi
    public ApplicationType type()
    {
        return ApplicationType.MIDLET;
    }
}