WIP: Scala 2.13

Author: fm3

scala/build.sbt

@@ -1,6 +1,6 @@
 name := "webknossos-wrap"
 
-scalaVersion := "2.12.7"
+scalaVersion := "2.13.11"
 
 javaOptions in test ++= Seq("-Xmx512m")
 
@@ -56,7 +56,6 @@ pomExtra := (
 
 libraryDependencies ++= Seq(
   "com.google.guava" % "guava" % "21.0",
-  "com.jsuereth" %% "scala-arm" % "2.0",
   "net.jpountz.lz4" % "lz4" % "1.3.0",
   "net.liftweb" % "lift-common_2.10" % "2.6-M3",
   "net.liftweb" % "lift-util_2.10" % "3.0-M1",

scala/src/main/scala/com/scalableminds/webknossos/wrap/WKWFile.scala

@@ -207,7 +207,7 @@ class WKWFile(val header: WKWHeader, fileMode: FileMode.Value, underlyingFile: R
     val sourceBlockLengths = if (header.isCompressed) {
       header.jumpTable.sliding(2).map(a => (a(1) - a(0)).toInt)
     } else {
-      Array.fill(header.numBlocksPerCube)(header.numBytesPerBlock).toIterator
+      Array.fill(header.numBlocksPerCube)(header.numBytesPerBlock).iterator
     }
 
     val targetBlockLengths = sourceBlockLengths.foldLeft[Box[Seq[Int]]](Full(Seq.empty)) {

scala/src/main/scala/com/scalableminds/webknossos/wrap/util/ResourceBox.scala

@@ -1,25 +1,29 @@
 package com.scalableminds.webknossos.wrap.util
 
-import net.liftweb.common.{Box, Failure}
+import net.liftweb.common.Box
+import net.liftweb.common.{Failure => BoxFailure}
 import net.liftweb.util.Helpers.tryo
-import resource._
+
+import scala.util.Using.Releasable
+import scala.util.{Success, Using, Failure => TryFailure}
+
 
 object ResourceBox {
-  def apply[R : Resource](resource: => R): Box[R] = {
+  def apply[R : Releasable](resource: => R): Box[R] = {
     tryo(resource) ~> "Exception during resource creation"
   }
 
-  def manage[R : Resource, T](resource: => R)(f: R => Box[T]): Box[T] = {
+  def manage[R : Releasable, T](resource: => R)(f: R => Box[T]): Box[T] = {
     for {
       r <- ResourceBox(resource)
-      result <- managed(r).map(f).either.either match {
-        case Left(ex) =>
-          Failure(s"Exception during resource management: ${ex.toString}")
-        case Right(result) =>
-          result
-      }
-    } yield {
-      result
-    }
+      result <- Using.Manager { use =>
+          f(use(r))
+        } match {
+          case TryFailure(ex) =>
+            BoxFailure(s"Exception during resource management: ${ex.toString}")
+          case Success(result) =>
+            result
+        }
+    } yield result
   }
 }