SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// Multi-Phasic Applications: 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 net.multiphasicapps.io;

import java.lang.ref.WeakReference;

/**
 * Not Described.
 *
 * @since 2020/12/05
 */
public class ChunkFutureChunk
    implements ChunkFuture
{
    /** The chunk to refer to. */
    private final WeakReference<ChunkWriter> chunk;
    
    /**
     * Initializes the future chunk reference.
     * 
     * @param __chunk The chunk to reference.
     * @throws NullPointerException On null arguments.
     * @since 2020/12/05
     */
    public ChunkFutureChunk(ChunkWriter __chunk)
        throws NullPointerException
    {
        if (__chunk == null)
            throw new NullPointerException("NARG"); 
        
        this.chunk = new WeakReference<>(__chunk);
    }
    
    /**
     * {@inheritDoc}
     * @since 2020/12/05
     */
    @Override
    public int get()
    {
        /* {@squirreljme.error BD06 The chunk was garbage collected.} */
        ChunkWriter chunk = this.chunk.get();
        if (chunk == null)
            throw new IllegalStateException("BD06");
        
        return chunk.fileSize();
    }
}