ByteToCharDecoder.java

package com.manning.nettyinaction.chapter7;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;

import java.util.List;

/**
 * Listing 7.8  of <i>Netty in Action</i>
 *
 * @author <a href="mailto:norman.maurer@googlemail.com">Norman Maurer</a>
 */
public class ByteToCharDecoder extends
        ByteToMessageDecoder {

    @Override
    public void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out)
            throws Exception {
        if (in.readableBytes() >= 2) {
            out.add(in.readChar());
        }
    }
}