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/* NSC -- new Scala compiler
* Copyright 2005-2006 LAMP/EPFL
* @author Lex Spoon
*/
// $Id$
package scala.tools.nsc
import java.io.File
import java.lang.reflect.{Method,Modifier}
import java.net.URLClassLoader
/** An object that runs another object specified by name. */
object ObjectRunner {
def isMainMethod(meth: Method): Boolean = {
def paramsOK(params: Array[Class]): Boolean =
params.length == 1 &&
params(0) == classOf[Array[String]]
meth.getName == "main" &&
Modifier.isStatic(meth.getModifiers) &&
paramsOK(meth.getParameterTypes)
}
def run(
classpath: List[String],
objectName: String,
arguments: Seq[String]): Unit =
try {
val classpathURLs = classpath.map(s => new File(s).toURL).toArray
val mainLoader = new URLClassLoader(classpathURLs, null)
val clsToRun = Class.forName(objectName, true, mainLoader)
val method = clsToRun.getMethods.find(isMainMethod) match {
case Some(meth) =>
meth
case None =>
throw new Error("no main method in object " + objectName)
}
val res = method.invoke(null, List(arguments.toArray).toArray)
()
} catch {
case e: Exception =>
// ClassNotFoundException, InvocationTargetException, ..
Console.println(e)
exit(1)
}
}
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