Scala example source code file (Compiler.scala)

This example Scala source code file (Compiler.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

ant, anyref, array, compiler, exception, int, invocationtargetexception, nsc, scalaclassloader, settings, string

The Compiler.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala Ant Tasks                      **
**    / __/ __// _ | / /  / _ |    (c) 2005-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */


package scala.tools.ant.sabbus

import java.io.File
import java.net.URL
import java.lang.reflect.InvocationTargetException
import scala.tools.nsc.util.ScalaClassLoader

class Compiler(classpath: Array[URL], val settings: Settings)
{
  val foreignCompilerName: String = "scala.tools.ant.sabbus.ForeignCompiler"
  private lazy val classLoader = ScalaClassLoader fromURLs classpath
  private lazy val foreignCompiler: AnyRef = classLoader create foreignCompilerName

  private def settingsArray: Array[String] = settings.toArgs.toArray
  foreignInvoke("args_$eq", Array(classOf[Array[String]]), Array(settingsArray))

  private def foreignInvoke(method: String, types: Array[Class[_]], args: Array[AnyRef]) =
    try foreignCompiler.getClass.getMethod(method, types: _*).invoke(foreignCompiler, args: _*)
    catch {
      case e: InvocationTargetException => throw e.getCause
    }

  def compile(files: Array[File]): (Int, Int) = //(errors, warnings)
    try {
      foreignInvoke("args_$eq", Array(classOf[Array[String]]), Array(settingsArray))
      val result =
        foreignInvoke("compile", Array(classOf[Array[File]]), Array(files)).asInstanceOf[Int]
      (result >> 16, result & 0x00FF)
    }
    catch {
      case ex: Exception => throw CompilationFailure(ex.getMessage, ex)
    }
}