Scala example source code file (SigTest.scala)

This example Scala source code file (SigTest.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, classtag, compiler, jfield, jmethod, nsc, parallel, reflection, sigtest, string

The SigTest.scala Scala example source code

/* NSC -- new Scala compiler
 * Copyright 2005-2013 LAMP/EPFL
 * @author Paul Phillips
 */

package scala.tools.partest

import scala.tools.nsc.Settings
import scala.tools.nsc.interpreter.ILoop
import java.lang.reflect.{ Method => JMethod, Field => JField }
import scala.reflect.{ClassTag, classTag}

/** Support code for testing signatures.
 */
trait SigTest {
  def mstr(m: JMethod) = "  (m) %s%s".format(
    m.toGenericString,
    if (m.isBridge) " (bridge)" else ""
  )
  def fstr(f: JField) = "  (f) %s".format(f.toGenericString)

  def isObjectMethodName(name: String) = classOf[Object].getMethods exists (_.getName == name)

  def fields[T: ClassTag](p: JField => Boolean) = {
    val cl = classTag[T].runtimeClass
    val fs = (cl.getFields ++ cl.getDeclaredFields).distinct sortBy (_.getName)

    fs filter p
  }
  def methods[T: ClassTag](p: JMethod => Boolean) = {
    val cl = classTag[T].runtimeClass
    val ms = (cl.getMethods ++ cl.getDeclaredMethods).distinct sortBy (x => (x.getName, x.isBridge))

    ms filter p
  }
  def allFields[T: ClassTag]()                = fields[T](_ => true)
  def allMethods[T: ClassTag]()               = methods[T](m => !isObjectMethodName(m.getName))
  def fieldsNamed[T: ClassTag](name: String)  = fields[T](_.getName == name)
  def methodsNamed[T: ClassTag](name: String) = methods[T](_.getName == name)

  def allGenericStrings[T: ClassTag]() =
    (allMethods[T]() map mstr) ++ (allFields[T]() map fstr)

  def genericStrings[T: ClassTag](name: String) =
    (methodsNamed[T](name) map mstr) ++ (fieldsNamed[T](name) map fstr)

  def show[T: ClassTag](name: String = "") = {
    println(classTag[T].runtimeClass.getName)
    if (name == "") allGenericStrings[T]() foreach println
    else genericStrings[T](name) foreach println
  }
}