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 cc.squirreljme.runtime.cldc.debug.Debugging;
import cc.squirreljme.runtime.cldc.util.StreamUtils;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * Forwards an {@link InputStream} to an {@link OutputStream}.
 *
 * @since 2024/02/04
 */
public class ForwardInputToOutput
    extends ForwardStream
{
    /** The stream to read from. */
    protected final InputStream in;
    
    /** The stream to write to. */
    protected final OutputStream out;
    
    /**
     * Initializes the forwarder.
     *
     * @param __from Where to read from.
     * @param __to Where to forward to.
     * @throws NullPointerException On null arguments.
     * @since 2024/02/04
     */
    public ForwardInputToOutput(InputStream __from, OutputStream __to)
        throws NullPointerException
    {
        super(__from, __to);
        
        this.in = __from;
        this.out = __to;
    }
    
    /**
     * {@inheritDoc}
     * @since 2024/02/04
     */
    @Override
    public void close()
        throws IOException
    {
        super.close();
    }
    
    /**
     * {@inheritDoc}
     * @since 2024/02/04
     */
    @Override
    public void run()
    {
        InputStream in = this.in;
        OutputStream out = this.out;
        
        // Run communication in a loop
        try
        {
            byte[] buf = StreamUtils.buffer(in);
            for (;;)
            {
                // Read in data
                int rc = in.read(buf, 0, buf.length);
                
                // EOF?
                if (rc < 0)
                    break;
                
                // Write to the output and flush the target
                out.write(buf, 0, rc);
                out.flush();
            }
        }
        
        // Failed?
        catch (IOException __e)
        {
            __e.printStackTrace();
        }
        
        // Make sure everything is cleaned up
        finally
        {
            try
            {
                this.close();
            }
            catch (IOException __e)
            {
                __e.printStackTrace();
            }
        }
    }
}