/* OutputObjectStream.java */

/* 
 * Copyright (C) 1996-98 Mark Boyns <boyns@sdsu.edu>
 *
 * This file is part of Muffin.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
package org.doit.io;

import java.io.IOException;
import java.io.InterruptedIOException;

/**
 * Output-side of an ObjectStream.
 *
 * @author Mark Boyns
 */
public class OutputObjectStream
{
    protected InputObjectStream in = null;
    protected boolean connected = false;

    public OutputObjectStream (InputObjectStream in) throws IOException
    {
	connect (in);
    }

    public OutputObjectStream ()
    {
    }

    public void connect (InputObjectStream in) throws IOException
    {
	if (connected)
	{
	    throw new IOException ("Output side already connected");
	}
	if (in.connected)
	{
	    throw new IOException ("Input side already connected");
	}

	this.in = in;
	in.closed = false;
	in.objects.removeAllElements ();
	connected = true;
    }

    public void write (Object obj) throws IOException
    {
	in.append (obj);
    }

    public synchronized void flush () throws IOException
    {
	if (in != null)
	{
	    synchronized (in)
	    {
		in.notify ();
	    }
	}
    }

    public void close () throws IOException
    {
	if (in != null)
	{
	    in.done ();
	}
    }
}
