Package org.apache.mina.filter.codec.netty

Source Code of org.apache.mina.filter.codec.netty.NettyEncoder

/*
*  Licensed to the Apache Software Foundation (ASF) under one
*  or more contributor license agreements.  See the NOTICE file
*  distributed with this work for additional information
*  regarding copyright ownership.  The ASF licenses this file
*  to you under the Apache License, Version 2.0 (the
*  "License"); you may not use this file except in compliance
*  with the License.  You may obtain a copy of the License at
*    http://www.apache.org/licenses/LICENSE-2.0
*  Unless required by applicable law or agreed to in writing,
*  software distributed under the License is distributed on an
*  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
*  KIND, either express or implied.  See the License for the
*  specific language governing permissions and limitations
*  under the License.
*/
package org.apache.mina.filter.codec.netty;

import net.gleamynode.netty2.Message;

import org.apache.mina.common.ByteBuffer;
import org.apache.mina.common.IoSession;
import org.apache.mina.filter.codec.ProtocolEncoder;
import org.apache.mina.filter.codec.ProtocolEncoderException;
import org.apache.mina.filter.codec.ProtocolEncoderOutput;

/**
* A MINA <tt>ProtocolEncoder</tt> that encodes Netty2 {@link Message}s
* into byte buffers.
*
* @author The Apache Directory Project (mina-dev@directory.apache.org)
* @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (Fri, 13 Jul 2007) $,
*/
public class NettyEncoder implements ProtocolEncoder {
    /**
     * Creates a new instance.
     */
    public NettyEncoder() {
    }

    public void encode(IoSession session, Object message,
            ProtocolEncoderOutput out) throws Exception {
        if (!(message instanceof Message)) {
            throw new ProtocolEncoderException(
                    "This encoder can decode only Netty Messages.");
        }

        for (;;) {
            ByteBuffer buf = ByteBuffer.allocate(8192);
            Message m = (Message) message;
            try {
                if (m.write(buf.buf())) {
                    break;
                }
            } finally {
                buf.flip();
                if (buf.hasRemaining()) {
                    out.write(buf);
                } else {
                    buf.release();
                }
            }
        }
    }

    public void dispose(IoSession session) throws Exception {
    }
}
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