[Editor] Enable compiling to build/classes directory

It has been done by moving the *.class files from the source directory to project.buildClassesDirectory right after the compilation is done

editor/src/main/kotlin/com/bartlomiejpluta/base/editor/code/compiler/DefaultCompilingService.kt

@@ -1,6 +1,5 @@
 package com.bartlomiejpluta.base.editor.code.compiler
 
-import com.bartlomiejpluta.base.editor.code.model.FileSystemNode
 import com.bartlomiejpluta.base.editor.project.context.ProjectContext
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.stereotype.Component
@@ -15,8 +14,8 @@ class DefaultCompilingService : CompilingService {
    private lateinit var projectContext: ProjectContext
 
    override fun compile() {
-      projectContext.project?.codeDirectory
-         ?.let { FileSystemNode(it) }
-         ?.let { compiler.compile(it) }
+      projectContext.project?.let {
+         compiler.compile(it.codeFSNode, it.buildClassesDirectory)
+      }
    }
 }

editor/src/main/kotlin/com/bartlomiejpluta/base/editor/code/compiler/JaninoCompiler.kt

@@ -7,12 +7,15 @@ import org.codehaus.janino.CompilerFactory
 import org.springframework.stereotype.Component
 import tornadofx.FX
 import java.io.File
+import java.nio.file.Files
+import java.nio.file.Path
+import java.util.stream.Collectors.toList
 
 @Component
 class JaninoCompiler : ScriptCompiler {
    private val compilerFactory = CompilerFactory()
 
-   override fun compile(sourceDirectory: FileSystemNode) {
+   override fun compile(sourceDirectory: FileSystemNode, targetDirectory: File) {
       val files = sourceDirectory.allChildren.map(FileSystemNode::file).filter(File::isFile)
       val compiler = compilerFactory.newCompiler()
 
@@ -22,6 +25,7 @@ class JaninoCompiler : ScriptCompiler {
       try {
          compiler.compile(files.toTypedArray())
          FX.eventbus.fire(UpdateCompilationLogEvent(UpdateCompilationLogEvent.Severity.INFO, "Compilation success"))
+         moveClassFilesToTargetDirectory(sourceDirectory.file, targetDirectory)
       } catch (e: CompileException) {
 
          // Because the Janino compiler assemblies the message with the location
@@ -32,4 +36,24 @@ class JaninoCompiler : ScriptCompiler {
          FX.eventbus.fire(UpdateCompilationLogEvent(UpdateCompilationLogEvent.Severity.ERROR, message, e.location))
       }
    }
-}
+
+   private fun moveClassFilesToTargetDirectory(sourceDirectory: File, targetDirectory: File) {
+      if (targetDirectory.exists() && !targetDirectory.isDirectory) {
+         throw IllegalStateException("Target directory is actually a file")
+      }
+
+      targetDirectory.mkdirs()
+
+      val files = Files.walk(sourceDirectory.toPath())
+         .filter(Files::isRegularFile)
+         .map(Path::toFile)
+         .collect(toList())
+
+      files.filter { it.extension == "class" }.forEach {
+         val relative = it.toRelativeString(sourceDirectory)
+         val targetFile = File(targetDirectory, relative)
+         it.copyTo(targetFile, overwrite = true)
+         it.delete()
+      }
+   }
+}

editor/src/main/kotlin/com/bartlomiejpluta/base/editor/code/compiler/ScriptCompiler.kt

@@ -1,7 +1,8 @@
 package com.bartlomiejpluta.base.editor.code.compiler
 
 import com.bartlomiejpluta.base.editor.code.model.FileSystemNode
+import java.io.File
 
 interface ScriptCompiler {
-   fun compile(sourceDirectory: FileSystemNode)
+   fun compile(sourceDirectory: FileSystemNode, targetDirectory: File)
 }

editor/src/main/kotlin/com/bartlomiejpluta/base/editor/project/model/Project.kt

@@ -43,6 +43,10 @@ class Project {
    val codeFSNodeProperty = Bindings.createObjectBinding({ FileSystemNode(codeDirectory) }, codeDirectoryProperty)
    val codeFSNode by codeFSNodeProperty
 
+   val buildClassesDirectoryProperty = SimpleObjectProperty<File>()
+   var buildClassesDirectory by buildClassesDirectoryProperty
+      private set
+
    init {
       sourceDirectoryProperty.addListener { _, _, dir ->
          dir?.let {
@@ -50,6 +54,7 @@ class Project {
             tileSetsDirectory = File(it, TILESETS_DIR)
             imagesDirectory = File(it, IMAGES_DIR)
             codeDirectory = File(it, CODE_DIR)
+            buildClassesDirectory = File(it, BUILD_CLASSES_DIR)
          }
       }
    }
@@ -67,5 +72,6 @@ class Project {
       const val TILESETS_DIR = "tilesets"
       const val IMAGES_DIR = "images"
       const val CODE_DIR = "code"
+      const val BUILD_CLASSES_DIR = "build/classes"
    }
 }