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/* NSC -- new Scala compiler
* Copyright 2005-2010 LAMP/EPFL
* @author Lex Spoon
*/
package scala.tools.nsc
import java.net.URL
import util.ScalaClassLoader
import java.lang.reflect.InvocationTargetException
import util.Exceptional.unwrap
/** An object that runs another object specified by name.
*
* @author Lex Spoon
* @version 1.1, 2007/7/13
*/
object ObjectRunner {
/** Check whether a class with the specified name
* exists on the specified class path. */
def classExists(urls: List[URL], objectName: String): Boolean =
ScalaClassLoader.classExists(urls, objectName)
/** 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, Unit] = {
try Right(run(urls, objectName, arguments))
catch { case e => Left(unwrap(e)) }
}
}
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