inputStream to Seq[String]

Input.scala

import java.io.{ BufferedReader, InputStream, InputStreamReader }

object Input{

  /**
   * inputStreamで取得したものをカラム数だけ取得
   * @return (String列, 途中で切ったか)
   */
  protected def stream2string(csvStream: InputStream, lineNumberOp: Option[Int]): (Seq[String], Boolean) = {
    val reader = new BufferedReader(new InputStreamReader(csvStream))
    var count = -1
    val a = Iterator.continually(reader.readLine()).takeWhile { r =>
      count += 1
      lineNumberOp.forall(_ >= count)
    }.toSeq
    a.init.filterNot(_ == null) -> (a.last != null)
  }
}