Kryo serializers for Scala None/Some

OptionSerializers.scala

import com.esotericsoftware.Kryo
import com.estoericsoftware.serialize.SimpleSerializer
import java.nio.ByteBuffer

object OptionSerializers {
  def register(kryo: Kryo) {
    kryo.register(classOf[None$], new NoneSerializer)
    kryo.register(classOf[Some[_]], new SomeSerializer(kryo))    
  }
}

class NoneSerializer extends SimpleSerializer[None.type] {
  def read(buffer: ByteBuffer)  = None
  def write(buffer: ByteBuffer, o: None.type) = ()
}

class SomeSerializer(kryo: Kryo) extends SimpleSerializer[Some[_]] {
  def read(buffer: ByteBuffer) = Some(kryo.readClassAndObject(buffer))
  def write(buffer: ByteBuffer, o: Some[_]) = kryo.writeClassAndObject(buffer, o.get)
}

import com.esotericsoftware.kryo.io.{Input, Output}
import com.esotericsoftware.kryo.{Kryo, Serializer}

/**
 * This works with kryo 2.21.
 */
object OptionSerializers {
  def register(kryo: Kryo) {
    kryo.register(Class.forName("scala.None$"), new NoneSerializer())
    kryo.register(classOf[Some[_]], new SomeSerializer(kryo))    
  }
}

class NoneSerializer extends Serializer[None.type] {
  override def write(kryo: Kryo, output: Output, `object`: None.type): Unit = ()

  override def read(kryo: Kryo, input: Input, `type`: Class[None.type]): None.type = None
}

class SomeSerializer(kryo: Kryo) extends Serializer[Some[_]] {
  override def write(kryo: Kryo, output: Output, `object`: Some[_]): Unit = kryo.writeClassAndObject(output, `object`)

  override def read(kryo: Kryo, input: Input, `type`: Class[Some[_]]): Some[_] = Some(kryo.readClassAndObject(input))
}

Nice, Thank you.

i used this code and it was not working. I made few changes have a look at it.

`import com.esotericsoftware.kryo.io.{Input, Output}
import com.esotericsoftware.kryo.{Kryo, Serializer}

object OptionSerializers {
def register(kryo: Kryo, noneCode: Int, someCode: Int) {
kryo.register(Class.forName("scala.None$"), new NoneSerializer(), noneCode)
kryo.register(classOf[Some[_]], new SomeSerializer(kryo), someCode)
}
}

class NoneSerializer extends Serializer[None.type] {
override def write(kryo: Kryo, output: Output, object: None.type): Unit = ()

override def read(kryo: Kryo, input: Input, type: Class[None.type]): None.type = None
}

class SomeSerializer(kryo: Kryo) extends Serializer[Some[]] {
override def write(kryo: Kryo, output: Output, object: Some[]): Unit = kryo.writeClassAndObject(output, object.get)

override def read(kryo: Kryo, input: Input, type: Class[Some[]]): Some[] = Some(kryo.readClassAndObject(input))
}`