com.avsystem.commons.mongo.MongoCodec.scala Maven / Gradle / Ivy

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package com.avsystem.commons
package mongo

import org.bson.codecs.configuration.CodecRegistry
import org.bson.codecs.{Codec, DecoderContext, EncoderContext}
import org.bson.{BsonReader, BsonValue, BsonWriter}

/**
  * @author MKej
  */
class MongoCodec[A, BSON <: BsonValue](bsonCodec: BsonCodec[A, BSON], registry: CodecRegistry)
  (implicit cta: ClassTag[A], ctbson: ClassTag[BSON])
  extends Codec[A] {

  val aClass = cta.runtimeClass.asInstanceOf[Class[A]]
  val bsonClass = ctbson.runtimeClass.asInstanceOf[Class[BSON]]

  def decode(reader: BsonReader, decoderContext: DecoderContext) =
    bsonCodec.fromBson(registry.get(bsonClass).decode(reader, decoderContext))

  def encode(writer: BsonWriter, value: A, encoderContext: EncoderContext) =
    registry.get(bsonClass).encode(writer, bsonCodec.toBson(value), encoderContext)

  def getEncoderClass = aClass
}