Scala example source code file (Repository.scala)

This example Scala source code file (Repository.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, collection, compiler, failed, global, iclass, ioexception, missingrequirementerror, nsc, option, repository, symbol, typeerror

The Repository.scala Scala example source code

/* NSC -- new Scala compiler
 * Copyright 2005-2013 LAMP/EPFL
 * @author  Martin Odersky
 */


package scala.tools.nsc
package backend
package icode

import scala.collection._

/**
 *  @author Iulian Dragos
 */
trait Repository {
  val global: Global
  import global._
  import icodes._

  val loaded: mutable.Map[Symbol, IClass] = perRunCaches.newMap()

  /** Is the given class available as icode? */
  def available(sym: Symbol) = classes.contains(sym) || loaded.contains(sym)

  /** The icode of the given class, if available */
  def icode(sym: Symbol): Option[IClass] = (classes get sym) orElse (loaded get sym)

  /** Load bytecode for given symbol. */
  def load(sym: Symbol): Boolean = {
    try {
      val (c1, c2) = icodeReader.readClass(sym)

      assert(c1.symbol == sym || c2.symbol == sym, "c1.symbol = %s, c2.symbol = %s, sym = %s".format(c1.symbol, c2.symbol, sym))
      loaded += (c1.symbol -> c1)
      loaded += (c2.symbol -> c2)

      true
    } catch {
      case e: Throwable => // possible exceptions are MissingRequirementError, IOException and TypeError -> no better common supertype
        log("Failed to load %s. [%s]".format(sym.fullName, e.getMessage))
        if (settings.debug) { e.printStackTrace }

        false
    }
  }
}