Play Framework/Scala example source code file (PlayPositionMapper.scala)

This example Play Framework source code file (PlayPositionMapper.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Play Framework (and Scala) source code examples by using tags.

All credit for the original source code belongs to Play Framework; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Play Framework tags/keywords

option, play, play framework, playpositionmapper, plugin, position, sbt, seq

The PlayPositionMapper.scala Play Framework example source code

/*
 * Copyright (C) 2009-2013 Typesafe Inc. <http://www.typesafe.com>
 */
package play.sbtplugin

import sbt._
import xsbti.Position

/**
 * Maps positions from compile errors on generated sources to positions in the original sources
 */
trait PlayPositionMapper {
  val routesPositionMapper: Position => Option[Position] = position => {
    position.sourceFile collect {
      case play.router.RoutesCompiler.MaybeGeneratedSource(generatedSource) => {
        new xsbti.Position {
          lazy val line = {
            position.line.flatMap(l => generatedSource.mapLine(l.asInstanceOf[Int])).map(l => xsbti.Maybe.just(l.asInstanceOf[java.lang.Integer])).getOrElse(xsbti.Maybe.nothing[java.lang.Integer])
          }
          lazy val lineContent = {
            line flatMap { lineNo =>
              sourceFile.flatMap { file =>
                IO.read(file).split('\n').lift(lineNo - 1)
              }
            } getOrElse ""
          }
          val offset = xsbti.Maybe.nothing[java.lang.Integer]
          val pointer = xsbti.Maybe.nothing[java.lang.Integer]
          val pointerSpace = xsbti.Maybe.nothing[String]
          val sourceFile = xsbti.Maybe.just(generatedSource.source.get)
          val sourcePath = xsbti.Maybe.just(sourceFile.get.getCanonicalPath)
        }
      }
    }
  }

  /** Sequence of position mappers. For using with SBT 0.13 sourcePositionMappers feature */
  val playPositionMappers = Seq(routesPositionMapper)
  /** Single function for mapping positions. For use with reloader and now */
  val playPositionMapper = routesPositionMapper
}