I have two case classes, one being recursive while the other references the recursive case class.

case class InitFunction(
  id: String,
  timestamp: Long,
  tree: Function
)

case class Function(
  name: String,
  path: String,
  callees: Option[List[Function]]
)

This was how I was planning to create codecs for these case classes:

    val factory = new PackerUnpackerFactory {
      def packer: MsgOutBuffer = MsgOutBuffer.create()
      def unpacker(bytes: Array[Byte]) = MsgInBuffer(bytes)
    }

    val mapCodec = CaseMapCodec.string(factory)

    implicit lazy val codec: MsgpackCodec[PythonFunction] = mapCodec.codec(PythonFunction.apply _, PythonFunction.unapply _)("name", "path", "callees")

    implicit val initCodec: MsgpackCodec[PythonInitFunction] = mapCodec.codec(PythonInitFunction.apply _, PythonInitFunction.unapply _)("id", "timestamp", "tree")

but I was getting a java.lang.StackOverflowError from the lazy codec constantly calling itself. Is there a correct way to unpack recursive case classes?

Hey, sorry for using the issue tracker for this. Could you tell me how you created this nice Maven Central badge in your README? Is this something that any project can use? Thanks!

I was trying to follow the examples and couldn't find MsgOutBuffer. Have I missed something? I've added the following in my build.sbt

libraryDependencies += "com.github.xuwei-k" %% "msgpack4z-core" % "0.3.7" 

Hi,

if I have the following case class:

case class Foo(a: String, b: Option[Int])

If i read a message pack encoded byte array which is equivalent to the following json (not encoded with msgpack4z):

{ "a": "test" }

I get a unpack error. Since the case class map codec looks for the presence of each key and fails if any key is not present.

It seems that the optionCodec expects the message pack encoded data to include the key regardless of whether there is a value for it or not.

Aside from writing my own case class codec, is there a way to handle unpacking such types?

There is no implementation here:

This means that extension types can't be used.

I was confused that CaseCodec seems to serialize case classes into FixedArrays.
In jackson-dataformat-msgpack, objects seem to be serialized into FixedMap that retains keys but msgpack4z does not.

What do you think about that?
Should I just use the MapCodec instead?

I think msgpack4z has better type class based functional API so I wanna use this rather than Jackson module.