com.kazzla.asterisk.netty.MessageDecoder.java Source code

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Here is the source code for com.kazzla.asterisk.netty.MessageDecoder.java

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/*
 * Copyright (c) 2014 koiroha.org.
 * All sources and related resources are available under Apache License 2.0.
 * http://www.apache.org/licenses/LICENSE-2.0.html
*/
package com.kazzla.asterisk.netty;

import com.kazzla.asterisk.Message;
import com.kazzla.asterisk.codec.Codec;
import com.kazzla.asterisk.codec.CodecException;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import scala.Option;
import scala.Some;

import java.nio.ByteBuffer;
import java.util.List;

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// MessageDecoder
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
/**
 * @author Takami Torao
 */
class MessageDecoder extends ByteToMessageDecoder {
    public final Codec codec;

    public MessageDecoder(Codec codec) {
        this.codec = codec;
    }

    public void decode(ChannelHandlerContext ctx, ByteBuf b, List<Object> out) throws CodecException {
        ByteBuffer buffer = b.nioBuffer();
        Option<Message> msg = codec.decode(buffer);
        if (msg instanceof Some) {
            b.skipBytes(buffer.position());
            out.add(msg);
        }
    }
}