Scala example source code file (ObjectRunner.scala)

This example Scala source code file (ObjectRunner.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

boolean, commonrunner, compiler, either, left, list, nsc, objectrunner, scalaclassloader, seq, string, throwable

The ObjectRunner.scala Scala example source code

/* NSC -- new Scala compiler
 * Copyright 2005-2013 LAMP/EPFL
 * @author  Lex Spoon
 */


package scala.tools.nsc

import java.net.URL
import util.ScalaClassLoader
import util.Exceptional.unwrap

trait CommonRunner {
  /** Run a given object, specified by name, using a
   *  specified classpath and argument list.
   *
   *  @throws ClassNotFoundException
   *  @throws NoSuchMethodException
   *  @throws InvocationTargetException
   */
  def run(urls: List[URL], objectName: String, arguments: Seq[String]) {
    (ScalaClassLoader fromURLs urls).run(objectName, arguments)
  }

  /** Catches exceptions enumerated by run (in the case of InvocationTargetException,
   *  unwrapping it) and returns it any thrown in Left(x).
   */
  def runAndCatch(urls: List[URL], objectName: String, arguments: Seq[String]): Either[Throwable, Boolean] = {
    try   { run(urls, objectName, arguments) ; Right(true) }
    catch { case e: Throwable => Left(unwrap(e)) }
  }
}

/** An object that runs another object specified by name.
 *
 *  @author  Lex Spoon
 *  @version 1.1, 2007/7/13
 */
object ObjectRunner extends CommonRunner { }