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.vm.springcoat.brackets.RefLinkHolder;
import cc.squirreljme.vm.springcoat.exceptions.SpringVirtualMachineException;
import net.multiphasicapps.classfile.ClassName;

/**
 * This is the base for ghost objects which do not have a defined class type
 * or anything associated with a class object.
 *
 * @since 2020/05/30
 */
public abstract class AbstractGhostObject
    implements SpringObject
{
    /** Which type does this represent? */
    protected final SpringClass represents;
    
    /**
     * Initializes the base object with the type it represents.
     * 
     * @param __machine The machine used.
     * @param __rep The type this represents.
     * @throws NullPointerException On null arguments.
     * @since 2021/01/03
     */
    public AbstractGhostObject(SpringMachine __machine, Class<?> __rep)
        throws NullPointerException
    {
        if (__rep == null)
            throw new NullPointerException("NARG");
        
        this.represents = __machine.classLoader().loadClass(
            new ClassName(__rep.getName().replace('.', '/')));
    }
    
    /**
     * {@inheritDoc}
     * @since 2020/05/30
     */
    @Override
    public final SpringMonitor monitor()
    {
        throw new SpringVirtualMachineException(
            "Ghost objects cannot have monitors: " + this.toString());
    }
    
    /**
     * {@inheritDoc}
     * @since 2020/05/31
     */
    @Override
    public RefLinkHolder refLink()
    {
        throw new SpringVirtualMachineException(
            "Ghost objects cannot have refLinks: " + this.toString());
    }
    
    /**
     * {@inheritDoc}
     * @since 2020/05/30
     */
    @Override
    public final SpringClass type()
    {
        return this.represents;
    }
}