ie3-institute · staudtMarius · Apr 22, 2025 · Apr 22, 2025 · Apr 22, 2025 · May 9, 2025
diff --git a/.scalafmt.conf b/.scalafmt.conf
@@ -0,0 +1,7 @@
+version = 3.8.1
+runner.dialect = scala3
+
+rewrite.scala3.convertToNewSyntax = true
+rewrite.scala3.removeOptionalBraces = no
+
+rewrite.rules = []
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed Version Check logic for Dependabot PRs [#330](https://github.com/ie3-institute/simBench2psdm/issues/330)
 - Removed Jenkins Pipeline. Now using GitHub Actions [#328](https://github.com/ie3-institute/simBench2psdm/issues/328)
 - Switch to Java 21 [#343](https://github.com/ie3-institute/simBench2psdm/issues/343)
+-   Updated to `scala3` [#313](https://github.com/ie3-institute/simBench2psdm/issues/313)
 
 ## [1.0.0] - 2021-08-03
 ### Added

@@ -17,8 +17,8 @@ ext {
 	//version (changing these should be considered thoroughly!)
 	javaVersion = JavaVersion.VERSION_21
 
-	scalaVersion = '2.13'
-	scalaBinaryVersion = '2.13.17'
+	scalaVersion = '3'
+	scalaBinaryVersion = '3.7.0'
 	tscfgVersion = '1.2.5'
 	slf4jVersion = '2.0.17'
 
@@ -57,7 +57,7 @@ dependencies {
 	}
 
 	/* util functions */
-	implementation('com.github.ie3-institute:PowerSystemUtils:2.2.1') {
+	implementation('com.github.ie3-institute:PowerSystemUtils:3.1.0') {
 		exclude group: 'org.apache.logging.log4j'
 		exclude group: 'org.slf4j'
 		/* Exclude our own nested dependencies */
@@ -80,8 +80,8 @@ dependencies {
 
 	// NEW scala libs //
 	// CORE Scala //
-	implementation "org.scala-lang:scala-library:$scalaBinaryVersion"
-	implementation 'org.scala-lang.modules:scala-parallel-collections_2.13:1.2.0'
+	implementation "org.scala-lang:scala3-library_3:$scalaBinaryVersion"
+	implementation "org.scala-lang.modules:scala-parallel-collections_$scalaVersion:1.2.0"
 
 	// TEST Scala //
 	testImplementation "org.scalatest:scalatest_${scalaVersion}:3.2.19"
@@ -91,7 +91,7 @@ dependencies {
 
 	// config //
 	implementation 'com.typesafe:config:+'
-	implementation "com.github.carueda:tscfg_2.13:${tscfgVersion}"
+	implementation "com.github.carueda:tscfg_$scalaVersion:${tscfgVersion}"
 
 	// cmd args parser //
 	implementation "com.github.scopt:scopt_${scalaVersion}:+"

diff --git a/gradle/scripts/spotless.gradle b/gradle/scripts/spotless.gradle
@@ -14,7 +14,7 @@ spotless {
 
 	//sets a license header, removes unused imports and formats conforming to the scala fmt formatter
 	scala {
-		scalafmt()
+		scalafmt().configFile('.scalafmt.conf')
 	}
 
 	/* cf. https://github.com/diffplug/spotless/tree/master/plugin-gradle */

diff --git a/src/main/scala/edu/ie3/simbench/config/ArgsParser.scala b/src/main/scala/edu/ie3/simbench/config/ArgsParser.scala
@@ -3,8 +3,8 @@ package edu.ie3.simbench.config
 import java.io.File
 import java.nio.file.Paths
 
-import com.typesafe.config.{ConfigFactory, Config => TypesafeConfig}
-import scopt.{OptionParser => scoptOptionParser}
+import com.typesafe.config.{ConfigFactory, Config as TypesafeConfig}
+import scopt.OptionParser as scoptOptionParser
 
 object ArgsParser {
   // case class for allowed arguments
@@ -24,11 +24,11 @@ object ArgsParser {
           )
         })
         .validate(value =>
-          if (value.trim.isEmpty) failure("config location cannot be empty")
+          if value.trim.isEmpty then failure("config location cannot be empty")
           else success
         )
         .validate(value =>
-          if (value.contains("\\"))
+          if value.contains("\\") then
             failure("wrong config path, expected: /, found: \\")
           else success
         )
@@ -48,7 +48,7 @@ object ArgsParser {
 
   private def parseTypesafeConfig(fileName: String): TypesafeConfig = {
     val file = Paths.get(fileName).toFile
-    if (!file.exists())
+    if !file.exists() then
       throw new Exception(s"Missing config file on path $fileName")
     parseTypesafeConfig(file)
   }

diff --git a/src/main/scala/edu/ie3/simbench/config/ConfigValidator.scala b/src/main/scala/edu/ie3/simbench/config/ConfigValidator.scala
@@ -47,7 +47,7 @@ case object ConfigValidator {
     */
   @throws[CodeValidationException]
   private def checkSimbenchCodes(codes: List[java.lang.String]): Unit = {
-    for (code <- codes) {
+    for code <- codes do {
       SimbenchCode.isValid(code) match {
         case Success(_)         =>
         case Failure(exception) => throw exception

diff --git a/src/main/scala/edu/ie3/simbench/config/SimbenchConfig.scala b/src/main/scala/edu/ie3/simbench/config/SimbenchConfig.scala
@@ -26,13 +26,13 @@ object SimbenchConfig {
             "directoryHierarchy"
           ),
         fileEncoding =
-          if (c.hasPathOrNull("fileEncoding")) c.getString("fileEncoding")
+          if c.hasPathOrNull("fileEncoding") then c.getString("fileEncoding")
           else "UTF-8",
         fileEnding =
-          if (c.hasPathOrNull("fileEnding")) c.getString("fileEnding")
+          if c.hasPathOrNull("fileEnding") then c.getString("fileEnding")
           else ".csv",
         separator =
-          if (c.hasPathOrNull("separator")) c.getString("separator") else ";"
+          if c.hasPathOrNull("separator") then c.getString("separator") else ";"
       )
     }
   }
@@ -78,14 +78,14 @@ object SimbenchConfig {
         ): SimbenchConfig.Io.Input.Download = {
           SimbenchConfig.Io.Input.Download(
             baseUrl =
-              if (c.hasPathOrNull("baseUrl")) c.getString("baseUrl")
+              if c.hasPathOrNull("baseUrl") then c.getString("baseUrl")
               else "https://daks.uni-kassel.de/bitstreams",
             failOnExistingFiles =
               c.hasPathOrNull("failOnExistingFiles") && c.getBoolean(
                 "failOnExistingFiles"
               ),
             directory =
-              if (c.hasPathOrNull("folder")) c.getString("folder")
+              if c.hasPathOrNull("folder") then c.getString("folder")
               else "inputData/download/"
           )
         }
@@ -98,13 +98,13 @@ object SimbenchConfig {
       ): SimbenchConfig.Io.Input = {
         SimbenchConfig.Io.Input(
           csv = SimbenchConfig.CsvConfig(
-            if (c.hasPathOrNull("csv")) c.getConfig("csv")
+            if c.hasPathOrNull("csv") then c.getConfig("csv")
             else com.typesafe.config.ConfigFactory.parseString("csv{}"),
             parentPath + "csv.",
             $tsCfgValidator
           ),
           download = SimbenchConfig.Io.Input.Download(
-            if (c.hasPathOrNull("download")) c.getConfig("download")
+            if c.hasPathOrNull("download") then c.getConfig("download")
             else com.typesafe.config.ConfigFactory.parseString("download{}"),
             parentPath + "download.",
             $tsCfgValidator
@@ -127,13 +127,13 @@ object SimbenchConfig {
         SimbenchConfig.Io.Output(
           compress = !c.hasPathOrNull("compress") || c.getBoolean("compress"),
           csv = SimbenchConfig.CsvConfig(
-            if (c.hasPathOrNull("csv")) c.getConfig("csv")
+            if c.hasPathOrNull("csv") then c.getConfig("csv")
             else com.typesafe.config.ConfigFactory.parseString("csv{}"),
             parentPath + "csv.",
             $tsCfgValidator
           ),
           targetDir =
-            if (c.hasPathOrNull("targetFolder")) c.getString("targetFolder")
+            if c.hasPathOrNull("targetFolder") then c.getString("targetFolder")
             else "convertedData"
         )
       }
@@ -146,13 +146,13 @@ object SimbenchConfig {
     ): SimbenchConfig.Io = {
       SimbenchConfig.Io(
         input = SimbenchConfig.Io.Input(
-          if (c.hasPathOrNull("input")) c.getConfig("input")
+          if c.hasPathOrNull("input") then c.getConfig("input")
           else com.typesafe.config.ConfigFactory.parseString("input{}"),
           parentPath + "input.",
           $tsCfgValidator
         ),
         output = SimbenchConfig.Io.Output(
-          if (c.hasPathOrNull("output")) c.getConfig("output")
+          if c.hasPathOrNull("output") then c.getConfig("output")
           else com.typesafe.config.ConfigFactory.parseString("output{}"),
           parentPath + "output.",
           $tsCfgValidator
@@ -168,13 +168,13 @@ object SimbenchConfig {
     val parentPath: java.lang.String = ""
     val $result = SimbenchConfig(
       conversion = SimbenchConfig.Conversion(
-        if (c.hasPathOrNull("conversion")) c.getConfig("conversion")
+        if c.hasPathOrNull("conversion") then c.getConfig("conversion")
         else com.typesafe.config.ConfigFactory.parseString("conversion{}"),
         parentPath + "conversion.",
         $tsCfgValidator
       ),
       io = SimbenchConfig.Io(
-        if (c.hasPathOrNull("io")) c.getConfig("io")
+        if c.hasPathOrNull("io") then c.getConfig("io")
         else com.typesafe.config.ConfigFactory.parseString("io{}"),
         parentPath + "io.",
         $tsCfgValidator
@@ -189,7 +189,7 @@ object SimbenchConfig {
       parentPath: java.lang.String,
       $tsCfgValidator: $TsCfgValidator
   ): scala.List[java.lang.String] = {
-    import scala.jdk.CollectionConverters._
+    import scala.jdk.CollectionConverters.*
     cl.asScala.map(cv => $_str(cv)).toList
   }
   private def $_expE(
@@ -200,15 +200,15 @@ object SimbenchConfig {
     new java.lang.RuntimeException(
       s"${cv.origin.lineNumber}: " +
         "expecting: " + exp + " got: " +
-        (if (u.isInstanceOf[java.lang.String]) "\"" + u + "\"" else u)
+        (if u.isInstanceOf[java.lang.String] then "\"" + u + "\"" else u)
     )
   }
 
   private def $_str(cv: com.typesafe.config.ConfigValue): java.lang.String = {
     java.lang.String.valueOf(cv.unwrapped())
   }
 
-  private final class $TsCfgValidator {
+  final class $TsCfgValidator {
     private val badPaths =
       scala.collection.mutable.ArrayBuffer[java.lang.String]()
 
@@ -228,7 +228,7 @@ object SimbenchConfig {
     }
 
     def validate(): Unit = {
-      if (badPaths.nonEmpty) {
+      if badPaths.nonEmpty then {
         throw new com.typesafe.config.ConfigException(
           badPaths.mkString("Invalid configuration:\n    ", "\n    ", "")
         ) {}

diff --git a/src/main/scala/edu/ie3/simbench/convert/CoordinateConverter.scala b/src/main/scala/edu/ie3/simbench/convert/CoordinateConverter.scala
@@ -3,7 +3,7 @@ package edu.ie3.simbench.convert
 import edu.ie3.datamodel.models.input.NodeInput
 import edu.ie3.simbench.model.datamodel.Coordinate
 import edu.ie3.util.geo.GeoUtils
-import org.locationtech.jts.geom.{Point, Coordinate => JTSCoordinate}
+import org.locationtech.jts.geom.{Point, Coordinate as JTSCoordinate}
 
 /** Converts a SimBench coordinate to the needed geometry position of
   * PowerSystemDataModel

diff --git a/src/main/scala/edu/ie3/simbench/convert/GridConverter.scala b/src/main/scala/edu/ie3/simbench/convert/GridConverter.scala
@@ -20,7 +20,7 @@ import edu.ie3.datamodel.models.input.graphics.{
   LineGraphicInput,
   NodeGraphicInput
 }
-import edu.ie3.datamodel.models.input.system._
+import edu.ie3.datamodel.models.input.system.*
 import edu.ie3.datamodel.models.result.NodeResult
 import edu.ie3.datamodel.models.timeseries.individual.IndividualTimeSeries
 import edu.ie3.datamodel.models.value.{PValue, SValue}
@@ -33,11 +33,11 @@ import edu.ie3.simbench.convert.types.{
   Transformer2wTypeConverter
 }
 import edu.ie3.simbench.exception.ConversionException
-import edu.ie3.simbench.model.datamodel._
+import edu.ie3.simbench.model.datamodel.*
 
 import scala.annotation.tailrec
-import scala.collection.parallel.CollectionConverters._
-import scala.jdk.CollectionConverters._
+import scala.collection.parallel.CollectionConverters.*
+import scala.jdk.CollectionConverters.*
 
 case object GridConverter extends LazyLogging {
 
@@ -61,7 +61,7 @@ case object GridConverter extends LazyLogging {
       removeSwitches: Boolean
   ): (
       JointGridContainer,
-      Set[IndividualTimeSeries[_ <: PValue]],
+      Set[IndividualTimeSeries[? <: PValue]],
       Seq[MappingEntry],
       Vector[NodeResult]
   ) = {
@@ -130,11 +130,10 @@ case object GridConverter extends LazyLogging {
       gridInput.lines,
       subnetConverter
     )
-    val joinOverrides = if (removeSwitches) {
+    val joinOverrides = if removeSwitches then {
       /* If switches are meant to be removed, join all nodes at closed switches */
       determineJoinOverrides(gridInput.switches, slackNodeKeys)
-    } else
-      Vector.empty
+    } else Vector.empty
 
     val nodeConversion =
       convertNodes(
@@ -156,10 +155,9 @@ case object GridConverter extends LazyLogging {
       "Creation of three winding transformers is not yet implemented."
     )
     val switches =
-      if (!removeSwitches)
+      if !removeSwitches then
         SwitchConverter.convert(gridInput.switches, nodeConversion).toSet.asJava
-      else
-        Set.empty[SwitchInput].asJava
+      else Set.empty[SwitchInput].asJava
     val measurements = MeasurementConverter
       .convert(gridInput.measurements, nodeConversion)
       .toSet
@@ -284,8 +282,7 @@ case object GridConverter extends LazyLogging {
   ): Vector[SubnetOverride] = {
     /* If the start node is among the junctions, do not travel further (Attention: Start node should not be among
      * junctions when the traversing starts, otherwise nothing will happen at all.) */
-    if (junctions.contains(startNode))
-      return overrides
+    if junctions.contains(startNode) then return overrides
 
     /* Get all switches, that are connected to the current starting point. If the other end of the switch is a junction,
      * don't follow this path, as the other side wouldn't be touched anyways. */
@@ -297,7 +294,7 @@ case object GridConverter extends LazyLogging {
       case _ => false
     }
 
-    if (nextSwitches.isEmpty) {
+    if nextSwitches.isEmpty then {
       /* There is no further switch, therefore the end is reached -> return the new mapping. Please note, as the subnet
        * of the current node is only altered, if there is a next switch available, dead end nodes are not altered. */
       overrides
@@ -585,7 +582,7 @@ case object GridConverter extends LazyLogging {
       branchNodes.contains(convertedNode)
     } match {
       case (connectedNodes, unconnectedNodes) =>
-        if (unconnectedNodes.nonEmpty)
+        if unconnectedNodes.nonEmpty then
           logger.warn(
             "The nodes with following keys are not part of any branch (aka. isolated) and will be neglected in the sequel.\n\t{}",
             unconnectedNodes.map(_._1.getKey).mkString("\n\t")
@@ -610,7 +607,7 @@ case object GridConverter extends LazyLogging {
       nodeConversion: Map[Node, NodeInput]
   ): (
       SystemParticipants,
-      Set[IndividualTimeSeries[_ <: PValue]],
+      Set[IndividualTimeSeries[? <: PValue]],
       Seq[MappingEntry]
   ) = {
     /* Convert all participant groups */
@@ -640,7 +637,7 @@ case object GridConverter extends LazyLogging {
         timeSeries.getUuid
       )
     }.toSeq
-    val timeSeries: Set[IndividualTimeSeries[_ <: PValue]] =
+    val timeSeries: Set[IndividualTimeSeries[? <: PValue]] =
       participantsToTimeSeries.map(_._2).toSet
 
     (

diff --git a/src/main/scala/edu/ie3/simbench/convert/LineConverter.scala b/src/main/scala/edu/ie3/simbench/convert/LineConverter.scala
@@ -15,7 +15,7 @@ import edu.ie3.simbench.model.datamodel.{Line, Node}
 import edu.ie3.util.quantities.PowerSystemUnits.KILOMETRE
 import tech.units.indriya.quantity.Quantities
 
-import scala.collection.parallel.CollectionConverters._
+import scala.collection.parallel.CollectionConverters.*
 
 case object LineConverter extends LazyLogging {
 
@@ -31,7 +31,7 @@ case object LineConverter extends LazyLogging {
     *   A [[Vector]] of [[LineInput]]s
     */
   def convert(
-      inputs: Vector[Line[_ <: LineType]],
+      inputs: Vector[Line[? <: LineType]],
       types: Map[LineType, LineTypeInput],
       nodes: Map[Node, NodeInput]
   ): Vector[LineInput] =
@@ -67,7 +67,7 @@ case object LineConverter extends LazyLogging {
     *   A [[LineInput]] model
     */
   def convert(
-      input: Line[_ <: LineType],
+      input: Line[? <: LineType],
       lineType: LineTypeInput,
       nodeA: NodeInput,
       nodeB: NodeInput,

diff --git a/src/main/scala/edu/ie3/simbench/convert/LoadConverter.scala b/src/main/scala/edu/ie3/simbench/convert/LoadConverter.scala
@@ -15,7 +15,7 @@ import edu.ie3.util.quantities.PowerSystemUnits.{KILOWATTHOUR, MEGAVOLTAMPERE}
 import tech.units.indriya.quantity.Quantities
 
 import java.util.{Locale, UUID}
-import scala.collection.parallel.CollectionConverters._
+import scala.collection.parallel.CollectionConverters.*
 
 case object LoadConverter extends ShuntConverter with LazyLogging {
   def convert(