build.sbt

scalaVersion := "2.11.7"

libraryDependencies ++= (
  ("com.github.pocketberserker" %% "scodec-msgpack" % "0.3.0") ::
  ("com.github.xuwei-k" % "msgpack4z-api" % "0.2.0") ::
  Nil
)

ScodecPacker.scala

package msgpack4z

import java.math.BigInteger

import scodec.Attempt
import scodec.bits.{BitVector, ByteVector}
import scodec.msgpack.codecs.MessagePackCodec
import scodec.msgpack.{MNil, MessagePack, Serialize}

object ScodecPacker {
  val codec = scodec.codecs.list(MessagePackCodec)
}

class ScodecPacker(var values: List[MessagePack]) extends MsgPacker{
  override def packByte(a: Byte): Unit = {
    values ::= Serialize.long.pack(a).require
  }

  override def packDouble(a: Double): Unit = {
    values ::= Serialize.double.pack(a).require
  }

  def bitVector(): Attempt[BitVector] = {
    ScodecPacker.codec.encode(values.reverse)
  }

  def byteArray(): Attempt[Array[Byte]] = {
    bitVector().map(_.toByteArray)
  }

  def byteVector(): Attempt[ByteVector] = {
    bitVector().map(_.toByteVector)
  }

  override def result(): Array[Byte] = {
    byteArray().require
  }

  def packByteVector(a: ByteVector): Unit = {
    values ::= Serialize.binary.pack(a).require
  }

  override def packBinary(a: Array[Byte]): Unit = {
    packByteVector(ByteVector(a))
  }

  override def packNil(): Unit = {
    values ::= MNil
  }

  override def packArrayHeader(a: Int): Unit = {
    // TODO 無理っぽい
  }

  override def packFloat(a: Float): Unit = ???

  override def writePayload(a: Array[Byte]): Unit = ???

  override def packInt(a: Int): Unit = ???

  override def mapEnd(): Unit = ???

  override def packMapHeader(a: Int): Unit = ???

  override def packShort(a: Short): Unit = ???

  override def packBoolean(a: Boolean): Unit = ???

  override def packBigInteger(a: BigInteger): Unit = ???

  override def packLong(a: Long): Unit = ???

  override def packExtTypeHeader(extType: Byte, payloadLen: Int): Unit = ???

  override def arrayEnd(): Unit = ???

  override def packString(a: String): Unit = ???
}