Merge pull request #121 from metarank/fix/remove-circe

remove unused json parser from catboost

Author: shuttie

build.sbt

@@ -21,7 +21,7 @@ libraryDependencies ++= Seq(
   "org.scalatest"          %% "scalatest-propspec"      % scalatestVersion % Test,
   "org.scalactic"          %% "scalactic"               % scalatestVersion % Test,
   "org.scalatestplus"      %% "scalacheck-1-16"         % "3.2.14.0"       % Test,
-  ("com.github.pathikrit"  %% "better-files"            % "3.9.2").cross(CrossVersion.for3Use2_13),
+  "com.github.pathikrit"   %% "better-files"            % "3.9.2",
   "org.slf4j"               % "slf4j-api"               % slf4jversion,
   "org.slf4j"               % "slf4j-simple"            % slf4jversion     % Test,
   "org.apache.commons"      % "commons-math3"           % "3.6.1",
@@ -31,10 +31,7 @@ libraryDependencies ++= Seq(
   "com.opencsv"             % "opencsv"                 % "5.7.1",
   "org.scala-lang.modules" %% "scala-collection-compat" % "2.9.0",
   "io.github.metarank"      % "catboost4j"              % "1.1.1-1",
-  "ai.catboost"             % "catboost-prediction"     % "1.1.1",
-  "io.circe"               %% "circe-core"              % circeVersion,
-  "io.circe"               %% "circe-generic"           % circeVersion,
-  "io.circe"               %% "circe-parser"            % circeVersion
+  "ai.catboost"             % "catboost-prediction"     % "1.1.1"
 )
 
 sonatypeProfileName := "io.github.metarank"

src/main/scala/io/github/metarank/ltrlib/booster/CatboostBooster.scala

@@ -2,10 +2,7 @@ package io.github.metarank.ltrlib.booster
 
 import ai.catboost.CatBoostModel
 import better.files.File
-import io.circe.Decoder
 import io.github.metarank.ltrlib.booster.Booster.BoosterFactory
-import io.circe.generic.semiauto._
-import io.github.metarank.ltrlib.booster.CatboostBooster.CatTrainJson.{Iteration, Meta}
 import io.github.metarank.ltrlib.output.LibSVMOutputFormat
 import ru.yandex.catboost.spark.catboost4j_spark.core.src.native_impl.{TVector_TString, native_impl}
 
@@ -44,27 +41,6 @@ case class CatboostBooster(booster: CatBoostModel, bytes: Array[Byte]) extends B
 
 object CatboostBooster extends BoosterFactory[String, CatboostBooster, CatboostOptions] {
 
-  case class CatTrainJson(meta: Meta, iterations: List[Iteration])
-
-  object CatTrainJson {
-    case class Meta(test_sets: List[String], test_metrics: List[TestMetric], learn_metrics: List[TestMetric])
-
-    case class TestMetric(best_value: String, name: String)
-
-    case class Iteration(
-        learn: List[Double],
-        passed_time: Double,
-        remaining_time: Double,
-        iteration: Int,
-        test: List[Double]
-    )
-
-    implicit val metaDecoder: Decoder[Meta]       = deriveDecoder[Meta]
-    implicit val tmDecoder: Decoder[TestMetric]   = deriveDecoder[TestMetric]
-    implicit val itDecoder: Decoder[Iteration]    = deriveDecoder[Iteration]
-    implicit val ctDecoder: Decoder[CatTrainJson] = deriveDecoder[CatTrainJson]
-  }
-
   override def apply(string: Array[Byte]): CatboostBooster = {
     val cb = CatBoostModel.loadModel(new ByteArrayInputStream(string))
     CatboostBooster(cb, string)