scala到java转换为sparksql中用户自定义的function(UDF)

Question

spark.sqlContext.udf.register('dataSource', (data: scala.collection.mutable.WrappedArray$ofRef, ofType : String) => {

    var flag = ''
    try{
    val array: Seq[String] = data.flatten(x => Seq(x.toString()))
    array.foreach(s => if(s.contains(ofType)) { flag = ofType })
    }
    catch {
    println("Exception :" + x.getMessage)
    flag = ''
    }
    flag;

})

Answer 1

It is not required to convert this Scala code into Java code. In Spark you can register a UDF in any of the languages and also make use of it in either Java or Scala as long as it is used in the same SparkSession or Context.