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Scala example source code file (JavaUniverse.scala)

This example Scala source code file (JavaUniverse.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

classloader, classtag, javamirror, javauniverse, mirror, null, runtimeclass, runtimeclasstag, runtimemirror, universe

The JavaUniverse.scala Scala example source code

package scala
package reflect
package api

/**
 *  <span class="badge badge-red" style="float: right;">EXPERIMENTAL</span>
 *
 *  A refinement of [[scala.reflect.api.Universe]] for runtime reflection using JVM classloaders.
 *
 *  This refinement equips mirrors with reflection capabilities for the JVM. `JavaMirror` can
 *  convert Scala reflection artifacts (symbols and types) into Java reflection artifacts (classes)
 *  and vice versa. It can also perform reflective invocations (getting/setting field values,
 *  calling methods, etc).
 *
 *  See the [[http://docs.scala-lang.org/overviews/reflection/overview.html Reflection Guide]] for details on how to use runtime reflection.
 *
 *  @groupname JavaUniverse Java Mirrors
 *  @group ReflectionAPI
 *
 *  @contentDiagram hideNodes "*Api"
 */
trait JavaUniverse extends Universe { self =>

  /** In runtime reflection universes, runtime representation of a class is `java.lang.Class`.
   *  @group JavaMirrors
   */
  type RuntimeClass = java.lang.Class[_]
  implicit val RuntimeClassTag: ClassTag[RuntimeClass] = ClassTag[RuntimeClass](classOf[RuntimeClass])

  /** In runtime reflection universes, mirrors are `JavaMirrors`.
   *  @group JavaMirrors
   */
  override type Mirror >: Null <: JavaMirror

  /** A refinement of [[scala.reflect.api.Mirror]] for runtime reflection using JVM classloaders.
   *
   *  With this upgrade, mirrors become capable of converting Scala reflection artifacts (symbols and types)
   *  into Java reflection artifacts (classes) and vice versa. Consequently, refined mirrors
   *  become capable of performing reflective invocations (getting/setting field values, calling methods, etc).
   *
   *  For more information about `Mirrors`s, see [[scala.reflect.api.Mirrors]] or the
   * [[http://docs.scala-lang.org/overviews/reflection/environment-universes-mirrors.html Reflection Guide: Mirrors]]
   *
   *  @group JavaMirrors
   */
  trait JavaMirror extends scala.reflect.api.Mirror[self.type] with RuntimeMirror {
    val classLoader: ClassLoader
    override def toString = s"JavaMirror with ${runtime.ReflectionUtils.show(classLoader)}"
  }

  /** Creates a runtime reflection mirror from a JVM classloader.
   *
   *  For more information about `Mirrors`s, see [[scala.reflect.api.Mirrors]] or the
   * [[http://docs.scala-lang.org/overviews/reflection/environment-universes-mirrors.html Reflection Guide: Mirrors]]
   *
   *  @group JavaMirrors
   */
  def runtimeMirror(cl: ClassLoader): Mirror
}

Other Scala source code examples

Here is a short list of links related to this Scala JavaUniverse.scala source code file:

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