How can I use this Java function in Scala in a UDF?-CodePudding

I have created a UDF in Scala (that im using with Spark btw) in order to get as a parameter a string and output a BeiderMorseEncoder string. I am using the org.apache.commons.codec.language.bm.BeiderMorseEncoder Java function from Apache Commons

import org.apache.commons.codec.language.bm.BeiderMorseEncoder
class BeiderMorseEncode extends UDF1[String, String] {
  override def call(input: String): String = {
    val m = new BeiderMorseEncoder()
    m.encode(input)
  }
}

object BeiderMorseEncode {
  def apply(): BeiderMorseEncode = {
    new BeiderMorseEncode()
  }
}

It works great! However I want to also use the following function (click to see signature) org.apache.commons.codec.language.bm.Lang.guessLanguage

if I try to create a similar UDF for this function in Scala like this :

import org.apache.commons.codec.language.bm.Lang
class guessNameLanguage extends UDF1[String, String] {
  override def call(input: String): String = {


    val m = new Lang()
    m.guessLanguage(input)
  }
}

object guessNameLanguage {
  def apply(): guessNameLanguage = {
    new guessNameLanguage()
  }
}

I am getting

org.apache.commons.codec.language.bm.Lang does not have a constructor

Any ideas on how can I make this work? I undersntand that I need to instantiate an object that has a constructor first ... but having had a look on the class hierarchy I dont see what object that would be. (it is obviously not Lang)

Apologies for my cringy Scala.

CodePudding user response：

If you look closely at the Javadoc you will see that the class provides two static methods to get instances of it.

So your code should end up being like this:

import org.apache.commons.codec.language.bm.{Lang, NameType}

val m = Lang.instance(NameType.GENERIC)
m.guessLanguage(input)