Scala example source code file (FreshNameCreator.scala)

This example Scala source code file (FreshNameCreator.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

atomiclong, collection, concurrenthashmap, freshnamecreator, reflection, string

The FreshNameCreator.scala Scala example source code

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

package scala.reflect.internal
package util

import java.util.concurrent.ConcurrentHashMap
import java.util.concurrent.atomic.AtomicLong
import scala.collection.mutable
import scala.reflect.NameTransformer

class FreshNameCreator(creatorPrefix: String = "") {
  protected val counters = new ConcurrentHashMap[String, AtomicLong]()

  /**
   * Create a fresh name with the given prefix. It is guaranteed
   * that the returned name has never been returned by a previous
   * call to this function (provided the prefix does not end in a digit).
   */
  def newName(prefix: String): String = {
    val safePrefix = NameTransformer.encode(prefix)
    counters.putIfAbsent(safePrefix, new AtomicLong(0))
    val idx = counters.get(safePrefix).incrementAndGet()
    s"$creatorPrefix$safePrefix$idx"
  }
}