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/**
 *  Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
 *
 *  Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 *
 *  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.tinygroup.nettyremote.codec.serialization;

import com.caucho.hessian.io.HessianOutput;
import com.caucho.hessian.io.SerializerFactory;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufOutputStream;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;

import java.io.Serializable;

public class HessianEncoder extends MessageToByteEncoder {
	
    private static final byte[] LENGTH_PLACEHOLDER = new byte[4];

    @Override
    protected void encode(ChannelHandlerContext ctx, Serializable msg, ByteBuf out) throws Exception {
        int startIdx = out.writerIndex();

        ByteBufOutputStream bout = new ByteBufOutputStream(out);
        bout.write(LENGTH_PLACEHOLDER);
//        ObjectOutputStream oout = new CompactObjectOutputStream(bout);
//        oout.writeObject(msg);
//        oout.flush();
//        oout.close();
        SerializerFactory serializerFactory = new SerializerFactory();
		serializerFactory.addFactory(new BigDecimalSerializerFactory());
        HessianOutput hout = new HessianOutput(bout);
        hout.setSerializerFactory(serializerFactory);
        hout.writeObject(msg);
        int endIdx = out.writerIndex();

        out.setInt(startIdx, endIdx - startIdx - 4);
    }
}