[light classes] drop old light classes and backend: iteration #5

drop LightClassDataHolder from LightClassGenerationSupport

^KT-48773

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/CliExtraDiagnosticsProvider.kt

@@ -23,6 +23,7 @@ import org.jetbrains.kotlin.psi.KtClassOrObject
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.psi.KtScript
 import org.jetbrains.kotlin.resolve.diagnostics.Diagnostics
+import org.jetbrains.kotlin.utils.addToStdlib.cast
 
 private val JAVA_API_STUB_FOR_SCRIPT = Key.create<CachedValue<LightClassDataHolder.ForScript>>("JAVA_API_STUB_FOR_SCRIPT")
 private val JAVA_API_STUB = Key.create<CachedValue<LightClassDataHolder.ForClass>>("JAVA_API_STUB")
@@ -50,22 +51,23 @@ class CliExtraDiagnosticsProvider : KotlinExtraDiagnosticsProvider {
             .findFilesForFacade(facadeFqName, moduleScope)
             .ifEmpty { return Diagnostics.EMPTY }
 
-        return LightClassGenerationSupport.getInstance(project).createDataHolderForFacade(files) { constructionContext ->
-            buildLightClass(facadeFqName.parent(), files, ClassFilterForFacade, constructionContext) generate@{ state, files ->
-                val representativeFile = files.first()
-                val fileClassInfo = JvmFileClassUtil.getFileClassInfoNoResolve(representativeFile)
-                if (!fileClassInfo.withJvmMultifileClass) {
-                    val codegen = state.factory.forPackage(representativeFile.packageFqName, files)
+        return LightClassGenerationSupport.getInstance(project).cast<CliLightClassGenerationSupport>()
+            .createDataHolderForFacade { constructionContext ->
+                buildLightClass(facadeFqName.parent(), files, ClassFilterForFacade, constructionContext) generate@{ state, files ->
+                    val representativeFile = files.first()
+                    val fileClassInfo = JvmFileClassUtil.getFileClassInfoNoResolve(representativeFile)
+                    if (!fileClassInfo.withJvmMultifileClass) {
+                        val codegen = state.factory.forPackage(representativeFile.packageFqName, files)
+                        codegen.generate()
+                        state.factory.done()
+                        return@generate
+                    }
+
+                    val codegen = state.factory.forMultifileClass(facadeFqName, files)
                     codegen.generate()
                     state.factory.done()
-                    return@generate
                 }
-
-                val codegen = state.factory.forMultifileClass(facadeFqName, files)
-                codegen.generate()
-                state.factory.done()
-            }
-        }.extraDiagnostics
+            }.extraDiagnostics
     }
 }
 

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/CliLightClassGenerationSupport.kt

@@ -93,7 +93,7 @@ class CliLightClassGenerationSupport(
         return ultraLightSupport
     }
 
-    override fun createDataHolderForClass(classOrObject: KtClassOrObject, builder: LightClassBuilder): LightClassDataHolder.ForClass {
+    fun createDataHolderForClass(classOrObject: KtClassOrObject, builder: LightClassBuilder): LightClassDataHolder.ForClass {
         //force resolve companion for light class generation
         traceHolder.bindingContext.get(BindingContext.CLASS, classOrObject)?.companionObjectDescriptor
 
@@ -104,12 +104,12 @@ class CliLightClassGenerationSupport(
         return LightClassDataHolderImpl(diagnostics)
     }
 
-    override fun createDataHolderForFacade(files: Collection<KtFile>, builder: LightClassBuilder): LightClassDataHolder.ForFacade {
+    fun createDataHolderForFacade(builder: LightClassBuilder): LightClassDataHolder.ForFacade {
         val (_, _, diagnostics) = builder(getContext())
         return LightClassDataHolderImpl(diagnostics)
     }
 
-    override fun createDataHolderForScript(script: KtScript, builder: LightClassBuilder): LightClassDataHolder.ForScript {
+    fun createDataHolderForScript(builder: LightClassBuilder): LightClassDataHolder.ForScript {
         val (_, _, diagnostics) = builder(getContext())
         return LightClassDataHolderImpl(diagnostics)
     }

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/LightClassDataProvider.kt

@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.fileClasses.JvmFileClassUtil
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.isAncestor
+import org.jetbrains.kotlin.utils.addToStdlib.cast
 import org.jetbrains.org.objectweb.asm.Type
 
 internal class LightClassDataProviderForClassOrObject(
@@ -27,7 +28,7 @@ internal class LightClassDataProviderForClassOrObject(
     private fun computeLightClassData(): LightClassDataHolder.ForClass {
         val file = classOrObject.containingKtFile
         val packageFqName = file.packageFqName
-        return LightClassGenerationSupport.getInstance(classOrObject.project)
+        return LightClassGenerationSupport.getInstance(classOrObject.project).cast<CliLightClassGenerationSupport>()
             .createDataHolderForClass(classOrObject) { constructionContext ->
                 buildLightClass(
                     packageFqName,
@@ -44,7 +45,7 @@ internal class LightClassDataProviderForClassOrObject(
             }
     }
 
-    override fun compute(): CachedValueProvider.Result<LightClassDataHolder.ForClass>? {
+    override fun compute(): CachedValueProvider.Result<LightClassDataHolder.ForClass> {
         val trackerService = KotlinModificationTrackerService.getInstance(classOrObject.project)
         return CachedValueProvider.Result.create(
             computeLightClassData(),
@@ -52,9 +53,7 @@ internal class LightClassDataProviderForClassOrObject(
         )
     }
 
-    override fun toString(): String {
-        return this::class.java.name + " for " + classOrObject.name
-    }
+    override fun toString(): String = this::class.java.name + " for " + classOrObject.name
 }
 
 private class ClassFilterForClassOrObject(private val classOrObject: KtClassOrObject) : GenerationState.GenerateClassFilter() {
@@ -102,19 +101,21 @@ private class ClassFilterForClassOrObject(private val classOrObject: KtClassOrOb
 
 internal class LightClassDataProviderForScript(private val script: KtScript) : CachedValueProvider<LightClassDataHolder.ForScript> {
     private fun computeLightClassData(): LightClassDataHolder.ForScript {
-        return LightClassGenerationSupport.getInstance(script.project).createDataHolderForScript(script) { constructionContext ->
-            buildLightClass(
-                script.fqName.parent(),
-                listOf(script.containingKtFile),
-                ClassFilterForScript(script),
-                constructionContext
-            ) generate@{ state, files ->
-                val scriptFile = files.first()
-                val codegen = state.factory.forPackage(scriptFile.packageFqName, files)
-                codegen.generate()
-                state.factory.done()
+        return LightClassGenerationSupport.getInstance(script.project)
+            .cast<CliLightClassGenerationSupport>()
+            .createDataHolderForScript { constructionContext ->
+                buildLightClass(
+                    script.fqName.parent(),
+                    listOf(script.containingKtFile),
+                    ClassFilterForScript(script),
+                    constructionContext
+                ) generate@{ state, files ->
+                    val scriptFile = files.first()
+                    val codegen = state.factory.forPackage(scriptFile.packageFqName, files)
+                    codegen.generate()
+                    state.factory.done()
+                }
             }
-        }
     }
 
     override fun compute(): CachedValueProvider.Result<LightClassDataHolder.ForScript> =