| career | drupal | java | mac | mysql | perl | scala | uml | unix  

Scala example source code file (JLineHistory.scala)

This example Scala source code file (JLineHistory.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; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

boolean, charsequence, compiler, history, int, jiterator, jlinefilehistory, jlinehistory, jlistiterator, nsc, simplehistory, unit

The JLineHistory.scala Scala example source code

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

package interpreter
package session

/** A straight scalification of the jline interface which mixes
 *  in the sparse jline-independent one too.
trait JLineHistory extends JHistory with History {
  def size: Int
  def isEmpty: Boolean
  def index: Int
  def clear(): Unit
  def get(index: Int): CharSequence
  def add(line: CharSequence): Unit
  def replace(item: CharSequence): Unit

  def entries(index: Int): JListIterator[JEntry]
  def entries(): JListIterator[JEntry]
  def iterator: JIterator[JEntry]

  def current(): CharSequence
  def previous(): Boolean
  def next(): Boolean
  def moveToFirst(): Boolean
  def moveToLast(): Boolean
  def moveTo(index: Int): Boolean
  def moveToEnd(): Unit

object JLineHistory {
  class JLineFileHistory extends SimpleHistory with FileBackedHistory {
    override def add(item: CharSequence): Unit = {
      if (!isEmpty && last == item)
        repldbg("Ignoring duplicate entry '" + item + "'")
      else {
    override def toString = "History(size = " + size + ", index = " + index + ")"

  def apply(): JLineHistory = try new JLineFileHistory catch { case x: Exception => new SimpleHistory() }

Other Scala source code examples

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

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller


new blog posts


Copyright 1998-2021 Alvin Alexander,
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.