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.jdwp.host;

import cc.squirreljme.jdwp.JDWPCommand;
import cc.squirreljme.jdwp.JDWPCommandSetClassLoader;
import cc.squirreljme.jdwp.JDWPErrorType;
import cc.squirreljme.jdwp.JDWPException;
import cc.squirreljme.jdwp.JDWPPacket;
import cc.squirreljme.jdwp.host.views.JDWPViewType;
import java.util.LinkedList;
import java.util.List;

/**
 * Support for class loader information.
 *
 * @since 2021/04/20
 */
public enum JDWPHostCommandSetClassLoader
    implements JDWPCommandHandler
{
    /** Classes which are visible to the given loader. */
    VISIBLE_CLASSES(JDWPCommandSetClassLoader.VISIBLE_CLASSES)
    {
        /**
         * {@inheritDoc}
         * @since 2021/04/20
         */
        @Override
        public JDWPPacket execute(JDWPHostController __controller,
            JDWPPacket __packet)
            throws JDWPException
        {
            // Null is a valid loader, for the system in the event this is
            // ever the case
            int id = __packet.readId();
            Object loader = __controller.getState().items.get(id);
            
            // Go through all known types to find ones that use this class
            // loader
            List<Object> found = new LinkedList<>();
            JDWPViewType viewType = __controller.viewType();
            for (Object type : __controller.allTypes(false))
                if (loader == viewType.classLoader(type))
                    found.add(type);
            
            JDWPPacket rv = __controller.reply(
                __packet.id(), JDWPErrorType.NO_ERROR);
            
            // Write all entries which meet the same class loader
            rv.writeInt(found.size());
            for (Object type : found)
            {
                if (type != null)
                    __controller.getState().items.put(type);
                
                __controller.writeTaggedId(rv, type);
            }
            
            return rv;
        }
    },
    
    /* End. */
    ;
    
    /** The base command. */
    public final JDWPCommand command;
    
    /** The ID of the packet. */
    public final int id;
    
    /**
     * Returns the ID used.
     * 
     * @param __id The ID used.
     * @since 2021/04/20
     */
    JDWPHostCommandSetClassLoader(JDWPCommand __id)
    {
        this.command = __id;
        this.id = __id.debuggerId();
    }
    
    /**
     * {@inheritDoc}
     * @since 2024/01/23
     */
    @Override
    public final JDWPCommand command()
    {
        return this.command;
    }
    
    /**
     * {@inheritDoc}
     * @since 2021/04/20
     */
    @Override
    public final int debuggerId()
    {
        return this.id;
    }
}