/*
 *
 * Copyright (c) 2006 The Apache Software Foundation
 *
 * Licensed 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.qpid.framing;

import org.apache.log4j.Logger;
import org.apache.mina.common.ByteBuffer;
import org.apache.mina.common.IoSession;
import org.apache.mina.filter.codec.ProtocolEncoderOutput;
import org.apache.mina.filter.codec.demux.MessageEncoder;

import java.util.HashSet;
import java.util.Set;

public class AMQDataBlockEncoder implements MessageEncoder
{
	Logger _logger = Logger.getLogger(AMQDataBlockEncoder.class);

    private Set _messageTypes;

    public AMQDataBlockEncoder()
    {
        _messageTypes = new HashSet();
        _messageTypes.add(EncodableAMQDataBlock.class);
    }

    public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception
    {
        final AMQDataBlock frame = (AMQDataBlock) message;
        int frameSize = (int)frame.getSize();
        final ByteBuffer buffer = ByteBuffer.allocate(frameSize);
        //buffer.setAutoExpand(true);
        frame.writePayload(buffer);

        if (_logger.isDebugEnabled())
        {
            _logger.debug("Encoded frame byte-buffer is '" + EncodingUtils.convertToHexString(buffer) + "'");
        }

        buffer.flip();
        out.write(buffer);
    }

    public Set getMessageTypes()
    {
        return _messageTypes;
    }
}
