Reimplement SettingsData.updateWith via reflection

build.sbt

@@ -16,6 +16,8 @@ lazy val root = project.in(file("."))
 
 lazy val brain = ProjectRef(file("lib/ocelot-brain"), "ocelot-brain")
 
+libraryDependencies += "org.scala-lang" % "scala-reflect" % scalaVersion.value
+
 libraryDependencies += "org.apache.logging.log4j" % "log4j-core" % "2.20.0"
 libraryDependencies += "org.apache.logging.log4j" % "log4j-api" % "2.20.0"
 libraryDependencies += "org.apache.logging.log4j" % "log4j-slf4j-impl" % "2.20.0"
@@ -41,4 +43,4 @@ assembly / assemblyMergeStrategy := {
   case _ => MergeStrategy.first
 }
 
-assembly / assemblyJarName := s"ocelot-desktop.jar"
+assembly / assemblyJarName := "ocelot-desktop.jar"

src/main/scala/ocelot/desktop/util/SettingsData.scala

@@ -1,8 +1,15 @@
 package ocelot.desktop.util
 
 import ocelot.desktop.Settings.Int2D
+import ocelot.desktop.util.SettingsData.Fields
+
+import scala.reflect.runtime.{universe => ru}
 
 class SettingsData {
+  // implementation notes:
+  // this class relies on reflection to implement updateWith
+  // it's assumed all fields that should be copied are declared as **public var**
+
   def this(data: SettingsData) {
     this()
     updateWith(data)
@@ -25,22 +32,24 @@ class SettingsData {
   var saveOnExit: Boolean = true
   var openLastWorkspace: Boolean = true
 
+  private val mirror = scala.reflect.runtime.universe.runtimeMirror(getClass.getClassLoader).reflect(this)
+
   def updateWith(data: SettingsData): Unit = {
-    // TODO: maybe apply some automated mapping solution
+    for (fieldSym <- Fields) {
-    // TODO: please do that ☝
+      val value = data.mirror.reflectMethod(fieldSym.getter.asMethod)()
-    this.volumeMaster = data.volumeMaster
+      mirror.reflectMethod(fieldSym.setter.asMethod)(value)
-    this.volumeBeep = data.volumeBeep
+    }
-    this.volumeEnvironment = data.volumeEnvironment
-    this.volumeInterface = data.volumeInterface
-    this.scaleFactor = data.scaleFactor
-
-    this.windowPosition = data.windowPosition
-    this.windowValidatePosition = data.windowValidatePosition
-    this.windowSize = data.windowSize
-    this.windowFullscreen = data.windowFullscreen
-
-    this.stickyWindows = data.stickyWindows
-    this.saveOnExit = data.saveOnExit
-    this.openLastWorkspace = data.openLastWorkspace
   }
 }
+
+object SettingsData {
+  private val Fields =
+    ru.typeOf[SettingsData]
+      .decls
+      .filter(_.isTerm)
+      .map(_.asTerm)
+      .filter(_.isVar)
+      // the var itself is private: check setter and getter
+      .filter(v => v.setter.isPublic && v.getter.isPublic)
+      .toList
+}