AI-Backend/java_compile/src/main/scala/com/example/model/classification/LRClassification.scala

package com.example.model.classification

import java.util
import com.example.SparkConnect
import com.example.model.helper.Utils
import org.apache.spark.ml.{Pipeline, PipelineModel, PipelineStage}
import org.apache.spark.ml.classification.{BinaryLogisticRegressionSummary, DecisionTreeClassificationModel, GBTClassifier, LogisticRegression, LogisticRegressionModel}
import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
import org.apache.spark.ml.feature.{IndexToString, StringIndexer, VectorIndexer}
import org.apache.spark.sql.{Dataset, Row}
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.stereotype.Component

import collection.JavaConverters._
import com.example.util.{Constant, TrainParamEnum, TrainParamReader}

@Component
class LRClassification extends DefaultClassification {


  override def buildClassifier(params: util.Map[String, Object]): PipelineStage = {

    val maxIter = TrainParamReader.readParam(params,TrainParamEnum.MAXI_ITER).asInstanceOf[Int]
    val regParam = TrainParamReader.readParam(params,TrainParamEnum.REG_PARAM).asInstanceOf[Double]
    val elasticNetParam = TrainParamReader.readParam(params,TrainParamEnum.ELASTIC_NET_PARAM).asInstanceOf[Double]

    val lr = new LogisticRegression()
      .setLabelCol("label")
      .setFeaturesCol("indexedFeatures")
      .setMaxIter(maxIter)
      .setRegParam(regParam)
      .setElasticNetParam(elasticNetParam)
    lr
  }


}