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//
//  ========================================================================
//  Copyright (c) 1995-2012 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.websocket.common.io;

import java.io.IOException;
import java.util.concurrent.Future;

import javax.net.websocket.SendResult;

import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.eclipse.jetty.websocket.api.WebSocketException;
import org.eclipse.jetty.websocket.api.extensions.Frame;
import org.eclipse.jetty.websocket.api.extensions.IncomingFrames;
import org.eclipse.jetty.websocket.api.extensions.OutgoingFrames;

public class FramePipes
{
    private static class In2Out implements IncomingFrames
    {
        private static final Logger LOG = Log.getLogger(FramePipes.In2Out.class);
        private OutgoingFrames outgoing;

        public In2Out(OutgoingFrames outgoing)
        {
            this.outgoing = outgoing;
        }

        @Override
        public void incomingError(WebSocketException e)
        {
            /* cannot send exception on */
        }

        @Override
        public void incomingFrame(Frame frame)
        {
            try
            {
                this.outgoing.outgoingFrame(frame);
            }
            catch (IOException e)
            {
                LOG.debug(e);
            }
        }
    }

    private static class Out2In implements OutgoingFrames
    {
        private IncomingFrames incoming;

        public Out2In(IncomingFrames incoming)
        {
            this.incoming = incoming;
        }

        @Override
        public Future outgoingFrame(Frame frame) throws IOException
        {
            this.incoming.incomingFrame(frame);

            return null; // FIXME: should return completed future.
        }
    }

    public static OutgoingFrames to(final IncomingFrames incoming)
    {
        return new Out2In(incoming);
    }

    public static IncomingFrames to(final OutgoingFrames outgoing)
    {
        return new In2Out(outgoing);
    }

}