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 cc.squirreljme.vm.springcoat;

import cc.squirreljme.runtime.cldc.debug.Debugging;
import cc.squirreljme.vm.springcoat.brackets.RefLinkHolder;
import net.multiphasicapps.classfile.ClassName;
import net.multiphasicapps.classfile.MethodNameAndType;

/**
 * This class allows for interfaces/objects within SpringCoat to be called
 * to an external object or interface that is within the host VM.
 *
 * @since 2021/02/25
 */
public abstract class SpringProxyObject
    implements SpringObject
{
    /** The machine used for the proxy. */
    private final SpringMachine machine;
    
    /** The type this is for. */
    private final ClassName type;
    
    /**
     * Initializes the proxy object.
     *
     * @param __type The class type that this is.
     * @param __machine The machine used for the proxy.
     * @throws NullPointerException On null arguments.
     * @since 2021/02/25
     */
    public SpringProxyObject(Class<?> __type, SpringMachine __machine)
        throws NullPointerException
    {
        this(new ClassName(__type.getName().replace('.', '/')),
            __machine);
    }
    
    /**
     * Initializes the proxy object.
     *
     * @param __type The class type that this is.
     * @param __machine The machine used for the proxy.
     * @throws NullPointerException On null arguments.
     * @since 2021/02/25
     */
    public SpringProxyObject(ClassName __type, SpringMachine __machine)
        throws NullPointerException
    {
        if (__type == null || __machine == null)
            throw new NullPointerException("NARG");
        
        this.type = __type;
        this.machine = __machine;
    }
    
    /**
     * Invokes the given proxy method.
     * 
     * @param __thread The thread is invoke on.
     * @param __method The method to invoke.
     * @param __args The arguments of the method.
     * @return The resultant value, if any.
     * @since 2021/02/25
     */
    protected abstract Object invokeProxy(SpringThreadWorker __thread,
        MethodNameAndType __method, Object[] __args);
    
    /**
     * {@inheritDoc}
     * @since 2021/02/25
     */
    @Override
    public final SpringMonitor monitor()
    {
        throw Debugging.todo();
    }
    
    /**
     * {@inheritDoc}
     * @since 2021/02/25
     */
    @Override
    public final RefLinkHolder refLink()
    {
        throw Debugging.todo();
    }
    
    /**
     * {@inheritDoc}
     * @since 2021/02/25
     */
    @Override
    public final SpringClass type()
    {
        return this.machine.classLoader().loadClass(this.type);
    }
}