Scala example source code file (SigTest.scala)

This example Scala source code file (SigTest.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

boolean, boolean, classmanifest, classmanifest, jfield, jmethod, jmethod, reflection, sigtest, string, string

The Scala SigTest.scala source code

/* NSC -- new Scala compiler
 * Copyright 2005-2011 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 }

/** 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: ClassManifest](p: JField => Boolean) = {
    val cl = classManifest[T].erasure    
    val fs = (cl.getFields ++ cl.getDeclaredFields).distinct sortBy (_.getName)
    
    fs filter p
  }
  def methods[T: ClassManifest](p: JMethod => Boolean) = {
    val cl = classManifest[T].erasure
    val ms = (cl.getMethods ++ cl.getDeclaredMethods).distinct sortBy (x => (x.getName, x.isBridge))
    
    ms filter p
  }
  def allFields[T: ClassManifest]()                = fields[T](_ => true)
  def allMethods[T: ClassManifest]()               = methods[T](m => !isObjectMethodName(m.getName))
  def fieldsNamed[T: ClassManifest](name: String)  = fields[T](_.getName == name)
  def methodsNamed[T: ClassManifest](name: String) = methods[T](_.getName == name)

  def allGenericStrings[T: ClassManifest]() =
    (allMethods[T]() map mstr) ++ (allFields[T]() map fstr)
    
  def genericStrings[T: ClassManifest](name: String) =
    (methodsNamed[T](name) map mstr) ++ (fieldsNamed[T](name) map fstr)

  def show[T: ClassManifest](name: String = "") = {
    println(classManifest[T].erasure.getName)
    if (name == "") allGenericStrings[T]() foreach println
    else genericStrings[T](name) foreach println
  }
}