Get jvm security algorithms (from a scala (2.10) script)

SecurityAlgorithms.scala

import scala.language.postfixOps

object Main {

  def getProviders(): Map[String, Seq[String]] = {
    import scala.collection.JavaConversions._
    import java.security._
    Security.getProviders().map{ provider =>
      val name = provider.getName
      name -> (provider.getServices.toList.map{ service =>
        def getAttr(service: Provider.Service, attr: String): Array[String] = {
          val ret = service.getAttribute(attr); if (ret == null) Array("") else ret.split('|') }
        getAttr(service, "SupportedModes").map{ mode => 
          getAttr(service, "SupportedPaddings").map{ padding => 
            s"${service.getAlgorithm}/${mode}/${padding}"
          }
        } flatten
      } flatten)
    } toMap
  }

  def main(args: Array[String]): Unit = {
    var matchers = args.map{_.toUpperCase}

    for ((provider, algorithms) <- getProviders) {
      println(provider)
      for (algorithm <- algorithms) {
          if (matchers.length == 0 || 
              matchers.forall(algorithm.toUpperCase.contains(_)))
          println("    " + algorithm)
      }
    }
  }
}