New J2K: Add IDEA integration of J2k

idea/idea-jvm/src/org/jetbrains/kotlin/idea/debugger/evaluate/KotlinCodeFragmentFactory.kt

@@ -43,7 +43,7 @@ import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.idea.codeInsight.CodeInsightUtils
 import org.jetbrains.kotlin.idea.debugger.KotlinEditorTextProvider
 import org.jetbrains.kotlin.idea.debugger.evaluate.compilation.DebugLabelPropertyDescriptorProvider
-import org.jetbrains.kotlin.idea.j2k.J2kPostProcessor
+import org.jetbrains.kotlin.idea.j2k.JavaToKotlinConverterFactory
 import org.jetbrains.kotlin.idea.refactoring.j2k
 import org.jetbrains.kotlin.idea.refactoring.j2kText
 import org.jetbrains.kotlin.idea.util.IdeDescriptorRenderers
@@ -253,7 +253,7 @@ class KotlinCodeFragmentFactory : CodeFragmentFactory() {
                                 kotlinCodeFragment.context
                             )
 
-                            AfterConversionPass(project, J2kPostProcessor(formatCode = false)).run(convertedFragment!!, range = null)
+                            AfterConversionPass(project, JavaToKotlinConverterFactory.createPostProcessor(formatCode = false)).run(convertedFragment!!, range = null)
                         }
                     } catch (e: Throwable) {
                         // ignored because text can be invalid

idea/resources/META-INF/extensions/ide.xml

@@ -57,6 +57,9 @@
 
         <extensionPoint qualifiedName="org.jetbrains.kotlin.resolveScopeEnlarger"
                         interface="org.jetbrains.kotlin.idea.caches.resolve.util.KotlinResolveScopeEnlarger"/>
+
+        <extensionPoint qualifiedName="org.jetbrains.kotlin.j2kConverterExtension"
+                        interface="org.jetbrains.kotlin.j2k.J2kConverterExtension"/>
     </extensionPoints>
 
     <extensions defaultExtensionNs="org.jetbrains.kotlin">
@@ -88,5 +91,15 @@
 
         <scratchFileLanguageProvider language="kotlin" implementationClass="org.jetbrains.kotlin.idea.scratch.KtScratchFileLanguageProvider"/>
         <scriptRelatedModulesProvider implementation="org.jetbrains.kotlin.idea.scratch.ScratchModuleDependencyProvider"/>
+
+        <j2kConverterExtension implementation="org.jetbrains.kotlin.idea.j2k.OldJ2kConverterExtension"/>
+        <j2kConverterExtension implementation="org.jetbrains.kotlin.nj2k.NewJ2kConverterExtension"/>
+    </extensions>
+
+    <extensions defaultExtensionNs="com.intellij">
+        <registryKey key="kotlin.use.new.j2k"
+                     description="Use new Java to Kotlin Converter (experimental)"
+                     defaultValue="false"
+                     restartRequired="false"/>
     </extensions>
 </idea-plugin>

idea/resources/META-INF/extensions/ide.xml.191

@@ -49,6 +49,9 @@
 
         <extensionPoint qualifiedName="org.jetbrains.kotlin.resolveScopeEnlarger"
                         interface="org.jetbrains.kotlin.idea.caches.resolve.util.KotlinResolveScopeEnlarger"/>
+
+        <extensionPoint qualifiedName="org.jetbrains.kotlin.j2kConverterExtension"
+                        interface="org.jetbrains.kotlin.j2k.J2kConverterExtension"/>
     </extensionPoints>
 
     <extensions defaultExtensionNs="org.jetbrains.kotlin">
@@ -80,5 +83,15 @@
 
         <scratchFileLanguageProvider language="kotlin" implementationClass="org.jetbrains.kotlin.idea.scratch.KtScratchFileLanguageProvider"/>
         <scriptRelatedModulesProvider implementation="org.jetbrains.kotlin.idea.scratch.ScratchModuleDependencyProvider"/>
+
+        <j2kConverterExtension implementation="org.jetbrains.kotlin.idea.j2k.OldJ2kConverterExtension"/>
+        <j2kConverterExtension implementation="org.jetbrains.kotlin.nj2k.NewJ2kConverterExtension"/>
+     </extensions>
+
+    <extensions defaultExtensionNs="com.intellij">
+        <registryKey key="kotlin.use.new.j2k"
+                             description="Use new Java to Kotlin Converter (experimental)"
+                             defaultValue="false"
+                             restartRequired="false"/>
     </extensions>
 </idea-plugin>

idea/resources/META-INF/extensions/ide.xml.as33

@@ -47,6 +47,9 @@
                         interface="org.jetbrains.kotlin.synthetic.SyntheticScopeProviderExtension"
                         area="IDEA_PROJECT"/>
 
+        <extensionPoint qualifiedName="org.jetbrains.kotlin.j2kConverterExtension"
+                        interface="org.jetbrains.kotlin.j2k.J2kConverterExtension"/>
+
         <extensionPoint qualifiedName="org.jetbrains.kotlin.resolveScopeEnlarger"
                         interface="org.jetbrains.kotlin.idea.caches.resolve.util.KotlinResolveScopeEnlarger"/>
     </extensionPoints>
@@ -80,5 +83,15 @@
 
         <scratchFileLanguageProvider language="kotlin" implementationClass="org.jetbrains.kotlin.idea.scratch.KtScratchFileLanguageProvider"/>
         <scriptRelatedModulesProvider implementation="org.jetbrains.kotlin.idea.scratch.ScratchModuleDependencyProvider"/>
+
+        <j2kConverterExtension implementation="org.jetbrains.kotlin.idea.j2k.OldJ2kConverterExtension"/>
+        <j2kConverterExtension implementation="org.jetbrains.kotlin.nj2k.NewJ2kConverterExtension"/>
+    </extensions>
+
+    <extensions defaultExtensionNs="com.intellij">
+        <registryKey key="kotlin.use.new.j2k"
+                   description="Use new Java to Kotlin Converter (experimental)"
+                   defaultValue="false"
+                   restartRequired="false"/>
     </extensions>
 </idea-plugin>

idea/resources/META-INF/extensions/ide.xml.as34

@@ -47,6 +47,9 @@
                         interface="org.jetbrains.kotlin.synthetic.SyntheticScopeProviderExtension"
                         area="IDEA_PROJECT"/>
 
+        <extensionPoint qualifiedName="org.jetbrains.kotlin.j2kConverterExtension"
+                        interface="org.jetbrains.kotlin.j2k.J2kConverterExtension"/>
+
         <extensionPoint qualifiedName="org.jetbrains.kotlin.resolveScopeEnlarger"
                         interface="org.jetbrains.kotlin.idea.caches.resolve.util.KotlinResolveScopeEnlarger"/>
     </extensionPoints>
@@ -80,5 +83,14 @@
 
         <scratchFileLanguageProvider language="kotlin" implementationClass="org.jetbrains.kotlin.idea.scratch.KtScratchFileLanguageProvider"/>
         <scriptRelatedModulesProvider implementation="org.jetbrains.kotlin.idea.scratch.ScratchModuleDependencyProvider"/>
+
+        <j2kConverterExtension implementation="org.jetbrains.kotlin.idea.j2k.OldJ2kConverterExtension"/>
+        <j2kConverterExtension implementation="org.jetbrains.kotlin.nj2k.NewJ2kConverterExtension"/>
+    </extensions>
+    <extensions defaultExtensionNs="com.intellij">
+            <registryKey key="kotlin.use.new.j2k"
+                       description="Use new Java to Kotlin Converter (experimental)"
+                       defaultValue="false"
+                       restartRequired="false"/>
     </extensions>
 </idea-plugin>

idea/src/org/jetbrains/kotlin/idea/actions/JavaToKotlinAction.kt

@@ -44,14 +44,14 @@ import com.intellij.psi.PsiManager
 import com.intellij.psi.util.PsiTreeUtil
 import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.idea.j2k.IdeaJavaToKotlinServices
-import org.jetbrains.kotlin.idea.j2k.J2kPostProcessor
+import org.jetbrains.kotlin.idea.j2k.JavaToKotlinConverterFactory
 import org.jetbrains.kotlin.idea.refactoring.toPsiFile
 import org.jetbrains.kotlin.idea.util.application.executeWriteCommand
 import org.jetbrains.kotlin.idea.util.application.progressIndicatorNullable
 import org.jetbrains.kotlin.idea.util.application.runReadAction
 import org.jetbrains.kotlin.idea.util.isRunningInCidrIde
 import org.jetbrains.kotlin.j2k.ConverterSettings
-import org.jetbrains.kotlin.j2k.JavaToKotlinConverter
+import org.jetbrains.kotlin.j2k.FilesResult
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.psi.UserDataProperty
 import java.io.File
@@ -110,12 +110,18 @@ class JavaToKotlinAction : AnAction() {
             enableExternalCodeProcessing: Boolean = true,
             askExternalCodeProcessing: Boolean = true
         ): List<KtFile> {
-            var converterResult: JavaToKotlinConverter.FilesResult? = null
+            var converterResult: FilesResult? = null
             fun convert() {
-                val converter = JavaToKotlinConverter(project, ConverterSettings.defaultSettings, IdeaJavaToKotlinServices)
+                val converter =
+                    JavaToKotlinConverterFactory.createJavaToKotlinConverter(
+                        project,
+                        ConverterSettings.defaultSettings,
+                        IdeaJavaToKotlinServices
+                    )
                 converterResult = converter.filesToKotlin(
-                    javaFiles, J2kPostProcessor(formatCode = true),
-                    ProgressManager.getInstance().progressIndicatorNullable!!
+                    javaFiles,
+                    JavaToKotlinConverterFactory.createPostProcessor(formatCode = true),
+                    progress = ProgressManager.getInstance().progressIndicatorNullable!!
                 )
             }
 

idea/src/org/jetbrains/kotlin/idea/actions/JavaToKotlinAction.kt.181

@@ -31,7 +31,6 @@ import com.intellij.openapi.project.Project
 import com.intellij.openapi.ui.MessageType
 import com.intellij.openapi.ui.Messages
 import com.intellij.openapi.ui.ex.MessagesEx
-import com.intellij.openapi.util.Key
 import com.intellij.openapi.ui.popup.JBPopupFactory
 import com.intellij.openapi.vfs.VfsUtilCore
 import com.intellij.openapi.vfs.VirtualFile
@@ -44,13 +43,13 @@ import com.intellij.psi.PsiManager
 import com.intellij.psi.util.PsiTreeUtil
 import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.idea.j2k.IdeaJavaToKotlinServices
-import org.jetbrains.kotlin.idea.j2k.J2kPostProcessor
+import org.jetbrains.kotlin.idea.j2k.JavaToKotlinConverterFactory
 import org.jetbrains.kotlin.idea.refactoring.toPsiFile
 import org.jetbrains.kotlin.idea.util.application.executeWriteCommand
 import org.jetbrains.kotlin.idea.util.application.progressIndicatorNullable
 import org.jetbrains.kotlin.idea.util.application.runReadAction
 import org.jetbrains.kotlin.j2k.ConverterSettings
-import org.jetbrains.kotlin.j2k.JavaToKotlinConverter
+import org.jetbrains.kotlin.j2k.FilesResult
 import org.jetbrains.kotlin.psi.KtFile
 import java.io.File
 import java.io.IOException
@@ -105,11 +104,17 @@ class JavaToKotlinAction : AnAction() {
             enableExternalCodeProcessing: Boolean = true,
             askExternalCodeProcessing: Boolean = true
         ): List<KtFile> {
-            var converterResult: JavaToKotlinConverter.FilesResult? = null
+            var converterResult: FilesResult? = null
             fun convert() {
-                val converter = JavaToKotlinConverter(project, ConverterSettings.defaultSettings, IdeaJavaToKotlinServices)
+                val converter =
+                    JavaToKotlinConverterFactory.createJavaToKotlinConverter(
+                        project,
+                        ConverterSettings.defaultSettings,
+                        IdeaJavaToKotlinServices
+                    )
                 converterResult = converter.filesToKotlin(
-                    javaFiles, J2kPostProcessor(formatCode = true),
+                    javaFiles,
+                    JavaToKotlinConverterFactory.createPostProcessor(formatCode = true),
                     ProgressManager.getInstance().progressIndicatorNullable!!
                 )
             }

idea/src/org/jetbrains/kotlin/idea/actions/JavaToKotlinAction.kt.as32

@@ -43,13 +43,13 @@ import com.intellij.psi.PsiManager
 import com.intellij.psi.util.PsiTreeUtil
 import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.idea.j2k.IdeaJavaToKotlinServices
-import org.jetbrains.kotlin.idea.j2k.J2kPostProcessor
+import org.jetbrains.kotlin.idea.j2k.JavaToKotlinConverterFactory
 import org.jetbrains.kotlin.idea.refactoring.toPsiFile
 import org.jetbrains.kotlin.idea.util.application.executeWriteCommand
 import org.jetbrains.kotlin.idea.util.application.progressIndicatorNullable
 import org.jetbrains.kotlin.idea.util.application.runReadAction
 import org.jetbrains.kotlin.j2k.ConverterSettings
-import org.jetbrains.kotlin.j2k.JavaToKotlinConverter
+import org.jetbrains.kotlin.j2k.FilesResult
 import org.jetbrains.kotlin.psi.KtFile
 import java.io.File
 import java.io.IOException
@@ -104,12 +104,18 @@ class JavaToKotlinAction : AnAction() {
             enableExternalCodeProcessing: Boolean = true,
             askExternalCodeProcessing: Boolean = true
         ): List<KtFile> {
-            var converterResult: JavaToKotlinConverter.FilesResult? = null
+            var converterResult: FilesResult? = null
             fun convert() {
-                val converter = JavaToKotlinConverter(project, ConverterSettings.defaultSettings, IdeaJavaToKotlinServices)
+                val converter =
+                    JavaToKotlinConverterFactory.createJavaToKotlinConverter(
+                        project,
+                        ConverterSettings.defaultSettings,
+                        IdeaJavaToKotlinServices
+                    )
                 converterResult = converter.filesToKotlin(
-                    javaFiles, J2kPostProcessor(formatCode = true),
-                    ProgressManager.getInstance().progressIndicatorNullable!!
+                    javaFiles,
+                    JavaToKotlinConverterFactory.createPostProcessor(formatCode = true),
+                    progress = ProgressManager.getInstance().progressIndicatorNullable!!
                 )
             }
 

idea/src/org/jetbrains/kotlin/idea/conversion/copy/ConvertJavaCopyPasteProcessor.kt

@@ -35,13 +35,12 @@ import org.jetbrains.kotlin.idea.codeInsight.KotlinCopyPasteReferenceProcessor
 import org.jetbrains.kotlin.idea.codeInsight.KotlinReferenceData
 import org.jetbrains.kotlin.idea.editor.KotlinEditorOptions
 import org.jetbrains.kotlin.idea.j2k.IdeaJavaToKotlinServices
-import org.jetbrains.kotlin.idea.j2k.J2kPostProcessor
+import org.jetbrains.kotlin.idea.j2k.JavaToKotlinConverterFactory
 import org.jetbrains.kotlin.idea.util.ImportInsertHelper
 import org.jetbrains.kotlin.idea.util.application.runReadAction
 import org.jetbrains.kotlin.idea.util.application.runWriteAction
 import org.jetbrains.kotlin.j2k.AfterConversionPass
 import org.jetbrains.kotlin.j2k.ConverterSettings
-import org.jetbrains.kotlin.j2k.JavaToKotlinConverter
 import org.jetbrains.kotlin.j2k.ParseContext
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.name.FqName
@@ -154,7 +153,7 @@ class ConvertJavaCopyPasteProcessor : CopyPastePostProcessor<TextBlockTransferab
             val newBounds = insertImports(boundsAfterReplace, referenceData, explicitImports)
 
             PsiDocumentManager.getInstance(project).commitAllDocuments()
-            AfterConversionPass(project, J2kPostProcessor(formatCode = true)).run(targetFile, newBounds)
+            AfterConversionPass(project, JavaToKotlinConverterFactory.createPostProcessor(formatCode = true)).run(targetFile, newBounds)
 
             conversionPerformed = true
         }
@@ -207,16 +206,17 @@ internal class ConversionResult(
 )
 
 internal fun ElementAndTextList.convertCodeToKotlin(project: Project): ConversionResult {
-    val converter = JavaToKotlinConverter(
+    val converter =
+        JavaToKotlinConverterFactory.createJavaToKotlinConverter(
             project,
             ConverterSettings.defaultSettings,
             IdeaJavaToKotlinServices
-    )
+        )
 
     val inputElements = this.toList().filterIsInstance<PsiElement>()
     val results =
             ProgressManager.getInstance().runProcessWithProgressSynchronously(
-                    ThrowableComputable<JavaToKotlinConverter.Result, Exception> {
+                    ThrowableComputable<org.jetbrains.kotlin.j2k.Result, Exception> {
                         runReadAction { converter.elementsToKotlin(inputElements) }
                     },
                     JavaToKotlinAction.title,

idea/src/org/jetbrains/kotlin/idea/conversion/copy/ConvertTextJavaCopyPasteProcessor.kt

@@ -36,7 +36,7 @@ import org.jetbrains.annotations.TestOnly
 import org.jetbrains.kotlin.asJava.toLightClass
 import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.idea.editor.KotlinEditorOptions
-import org.jetbrains.kotlin.idea.j2k.J2kPostProcessor
+import org.jetbrains.kotlin.idea.j2k.JavaToKotlinConverterFactory
 import org.jetbrains.kotlin.idea.util.application.runWriteAction
 import org.jetbrains.kotlin.j2k.AfterConversionPass
 import org.jetbrains.kotlin.lexer.KtTokens
@@ -129,7 +129,7 @@ class ConvertTextJavaCopyPasteProcessor : CopyPastePostProcessor<TextBlockTransf
         }
 
         psiDocumentManager.commitAllDocuments()
-        AfterConversionPass(project, J2kPostProcessor(formatCode = true)).run(targetFile, newBounds)
+        AfterConversionPass(project, JavaToKotlinConverterFactory.createPostProcessor(formatCode = true)).run(targetFile, newBounds)
 
         conversionPerformed = true
     }

idea/src/org/jetbrains/kotlin/idea/j2k/JavaToKotlinConverterFactory.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.j2k
+
+import com.intellij.openapi.project.Project
+import org.jetbrains.kotlin.j2k.*
+
+object JavaToKotlinConverterFactory {
+    fun createJavaToKotlinConverter(
+        project: Project,
+        settings: ConverterSettings,
+        services: JavaToKotlinConverterServices
+    ): JavaToKotlinConverter =
+        J2kConverterExtension.extension.createJavaToKotlinConverter(project, settings, services)
+
+    fun createPostProcessor(formatCode: Boolean, settings: ConverterSettings = ConverterSettings.defaultSettings): PostProcessor =
+        J2kConverterExtension.extension.createPostProcessor(formatCode, settings)
+}

idea/src/org/jetbrains/kotlin/idea/j2k/OldJ2kConveterExtension.kt

@@ -0,0 +1,18 @@
+package org.jetbrains.kotlin.idea.j2k
+
+import com.intellij.openapi.project.Project
+import org.jetbrains.kotlin.j2k.*
+
+class OldJ2kConverterExtension : J2kConverterExtension() {
+    override val isNewJ2k = false
+
+    override fun createJavaToKotlinConverter(
+        project: Project,
+        settings: ConverterSettings,
+        services: JavaToKotlinConverterServices
+    ): JavaToKotlinConverter =
+        OldJavaToKotlinConverter(project, settings, services)
+
+    override fun createPostProcessor(formatCode: Boolean, settings: ConverterSettings): PostProcessor =
+        J2kPostProcessor(formatCode)
+}

idea/src/org/jetbrains/kotlin/idea/refactoring/kotlinRefactoringUtil.kt

@@ -75,6 +75,7 @@ import org.jetbrains.kotlin.idea.codeInsight.DescriptorToSourceUtilsIde
 import org.jetbrains.kotlin.idea.core.*
 import org.jetbrains.kotlin.idea.core.util.showYesNoCancelDialog
 import org.jetbrains.kotlin.idea.j2k.IdeaJavaToKotlinServices
+import org.jetbrains.kotlin.idea.j2k.JavaToKotlinConverterFactory
 import org.jetbrains.kotlin.idea.project.languageVersionSettings
 import org.jetbrains.kotlin.idea.refactoring.changeSignature.KotlinValVar
 import org.jetbrains.kotlin.idea.refactoring.changeSignature.toValVar
@@ -644,11 +645,12 @@ fun createJavaClass(klass: KtClass, targetClass: PsiClass?, forcePlainClass: Boo
 fun PsiElement.j2kText(): String? {
     if (language != JavaLanguage.INSTANCE) return null
 
-    val j2kConverter = JavaToKotlinConverter(
-        project,
-        ConverterSettings.defaultSettings,
-        IdeaJavaToKotlinServices
-    )
+    val j2kConverter =
+        JavaToKotlinConverterFactory.createJavaToKotlinConverter(
+            project,
+            ConverterSettings.defaultSettings,
+            IdeaJavaToKotlinServices
+        )
     return j2kConverter.elementsToKotlin(listOf(this)).results.single()?.text ?: return null //TODO: insert imports
 }
 

j2k/src/org/jetbrains/kotlin/j2k/AfterConversionPass.kt

@@ -28,8 +28,7 @@ class AfterConversionPass(val project: Project, val postProcessor: PostProcessor
             marker.isGreedyToLeft = true
             marker.isGreedyToRight = true
             marker
-        }
-        else {
+        } else {
             null
         }
 

j2k/src/org/jetbrains/kotlin/j2k/J2KConverterExtension.kt

@@ -0,0 +1,29 @@
+package org.jetbrains.kotlin.j2k
+
+import com.intellij.openapi.extensions.AbstractExtensionPointBean
+import com.intellij.openapi.extensions.ExtensionPointName
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.util.registry.Registry
+
+abstract class J2kConverterExtension : AbstractExtensionPointBean() {
+    abstract val isNewJ2k: Boolean
+
+    abstract fun createJavaToKotlinConverter(
+        project: Project,
+        settings: ConverterSettings,
+        services: JavaToKotlinConverterServices
+    ): JavaToKotlinConverter
+
+    abstract fun createPostProcessor(formatCode: Boolean, settings: ConverterSettings = ConverterSettings.defaultSettings): PostProcessor
+
+
+    companion object {
+        private fun useNewJ2k() = Registry.`is`("kotlin.use.new.j2k", false)
+
+        val EP_NAME = ExtensionPointName.create<J2kConverterExtension>("org.jetbrains.kotlin.j2kConverterExtension")
+
+        val extension: J2kConverterExtension
+            get() = EP_NAME.extensions.first { it.isNewJ2k == useNewJ2k() }
+    }
+}
+

j2k/src/org/jetbrains/kotlin/j2k/JavaToKotlinConverter.kt

@@ -47,35 +47,37 @@ enum class ParseContext {
     CODE_BLOCK
 }
 
-class JavaToKotlinConverter(
-    private val project: Project,
-    private val settings: ConverterSettings,
-    private val services: JavaToKotlinConverterServices
-) {
+interface ExternalCodeProcessing {
+    fun prepareWriteOperation(progress: ProgressIndicator): () -> Unit
+}
+
+
+data class ElementResult(val text: String, val importsToAdd: Set<FqName>, val parseContext: ParseContext)
+
+data class Result(val results: List<ElementResult?>, val externalCodeProcessing: ExternalCodeProcessing?)
+
+data class FilesResult(val results: List<String>, val externalCodeProcessing: ExternalCodeProcessing?)
+
+abstract class JavaToKotlinConverter(private val project: Project) {
+    protected abstract fun elementsToKotlin(inputElements: List<PsiElement>, processor: WithProgressProcessor): Result
+
     private val LOG = Logger.getInstance("#org.jetbrains.kotlin.j2k.JavaToKotlinConverter")
 
-    interface ExternalCodeProcessing {
-        fun prepareWriteOperation(progress: ProgressIndicator): () -> Unit
-    }
-
-    data class ElementResult(val text: String, val importsToAdd: Set<FqName>, val parseContext: ParseContext)
-
-    data class Result(val results: List<ElementResult?>, val externalCodeProcessing: ExternalCodeProcessing?)
-
-    data class FilesResult(val results: List<String>, val externalCodeProcessing: ExternalCodeProcessing?)
-
-    fun filesToKotlin(files: List<PsiJavaFile>, postProcessor: PostProcessor, progress: ProgressIndicator = EmptyProgressIndicator()): FilesResult {
+    fun filesToKotlin(
+        files: List<PsiJavaFile>,
+        postProcessor: PostProcessor,
+        progress: ProgressIndicator = EmptyProgressIndicator()
+    ): FilesResult {
         val withProgressProcessor = WithProgressProcessor(progress, files)
         val (results, externalCodeProcessing) = ApplicationManager.getApplication().runReadAction(Computable {
             elementsToKotlin(files, withProgressProcessor)
         })
 
-
         val texts = withProgressProcessor.processItems(0.5, results.withIndex()) { pair ->
             val (i, result) = pair
             try {
                 val kotlinFile = ApplicationManager.getApplication().runReadAction(Computable {
-                    KtPsiFactory(project).createAnalyzableFile("dummy.kt", result!!.text, files[i])
+                    KtPsiFactory(project).createFileWithLightClassSupport("dummy.kt", result!!.text, files[i])
                 })
 
                 result!!.importsToAdd.forEach { postProcessor.insertImport(kotlinFile, it) }
@@ -83,11 +85,9 @@ class JavaToKotlinConverter(
                 AfterConversionPass(project, postProcessor).run(kotlinFile, range = null)
 
                 kotlinFile.text
-            }
-            catch(e: ProcessCanceledException) {
+            } catch (e: ProcessCanceledException) {
                 throw e
-            }
-            catch(t: Throwable) {
+            } catch (t: Throwable) {
                 LOG.error(t)
                 result!!.text
             }
@@ -99,16 +99,22 @@ class JavaToKotlinConverter(
     fun elementsToKotlin(inputElements: List<PsiElement>): Result {
         return elementsToKotlin(inputElements, WithProgressProcessor.DEFAULT)
     }
+}
 
-    private  fun elementsToKotlin(inputElements: List<PsiElement>, processor: WithProgressProcessor): Result {
+class OldJavaToKotlinConverter(
+    project: Project,
+    private val settings: ConverterSettings,
+    private val services: JavaToKotlinConverterServices
+) : JavaToKotlinConverter(project) {
+
+    protected override fun elementsToKotlin(inputElements: List<PsiElement>, processor: WithProgressProcessor): Result {
         try {
             val usageProcessings = LinkedHashMap<PsiElement, MutableCollection<UsageProcessing>>()
             val usageProcessingCollector: (UsageProcessing) -> Unit = {
                 usageProcessings.getOrPut(it.targetElement, { ArrayList() }).add(it)
             }
 
-            fun inConversionScope(element: PsiElement)
-                    = inputElements.any { it.isAncestor(element, strict = false) }
+            fun inConversionScope(element: PsiElement) = inputElements.any { it.isAncestor(element, strict = false) }
 
 
             val intermediateResults = processor.processItems(0.25, inputElements) { inputElement ->
@@ -127,14 +133,12 @@ class JavaToKotlinConverter(
             val externalCodeProcessing = buildExternalCodeProcessing(usageProcessings, ::inConversionScope)
 
             return Result(results, externalCodeProcessing)
-        }
-        catch(e: ElementCreationStackTraceRequiredException) {
+        } catch (e: ElementCreationStackTraceRequiredException) {
             // if we got this exception then we need to turn element creation stack traces on to get better diagnostic
             Element.saveCreationStacktraces = true
             try {
                 return elementsToKotlin(inputElements)
-            }
-            finally {
+            } finally {
                 Element.saveCreationStacktraces = false
             }
         }
@@ -162,7 +166,7 @@ class JavaToKotlinConverter(
             .groupBy { it.targetElement }
         if (map.isEmpty()) return null
 
-        return object: ExternalCodeProcessing {
+        return object : ExternalCodeProcessing {
             override fun prepareWriteOperation(progress: ProgressIndicator): () -> Unit {
                 val refs = ArrayList<ReferenceInfo>()
 
@@ -183,7 +187,8 @@ class JavaToKotlinConverter(
                                 .filterNot { inConversionScope(it.element) }
                                 .mapTo(refs) { ReferenceInfo(it, psiElement, it.element.containingFile, processings) }
                         },
-                        ProgressPortionReporter(progress, i / map.size.toDouble(), 1.0 / map.size))
+                        ProgressPortionReporter(progress, i / map.size.toDouble(), 1.0 / map.size)
+                    )
 
                 }
 
@@ -232,86 +237,89 @@ class JavaToKotlinConverter(
             return -info1.offset.compareTo(info2.offset)
         }
     }
+}
 
-    private class WithProgressProcessor(private val progress: ProgressIndicator?, private val files: List<PsiJavaFile>?) {
-        companion object {
-            val DEFAULT = WithProgressProcessor(null, null)
-        }
 
-        private val progressText = "Converting Java to Kotlin"
-        private val fileCount = files?.size ?: 0
-        private val fileCountText = fileCount.toString() + " " + if (fileCount > 1) "files" else "file"
-        private var fraction = 0.0
-        private var pass = 1
-
-        fun <TInputItem, TOutputItem> processItems(
-            fractionPortion: Double,
-            inputItems: Iterable<TInputItem>,
-            processItem: (TInputItem) -> TOutputItem
-        ): List<TOutputItem> {
-            val outputItems = ArrayList<TOutputItem>()
-            // we use special process with EmptyProgressIndicator to avoid changing text in our progress by inheritors search inside etc
-            ProgressManager.getInstance().runProcess(
-                {
-                    progress?.text = "$progressText ($fileCountText) - pass $pass of 3"
-
-                    for ((i, item) in inputItems.withIndex()) {
-                        progress?.checkCanceled()
-                        progress?.fraction = fraction + fractionPortion * i / fileCount
-
-                        progress?.text2 = files!![i].virtualFile.presentableUrl
-
-                        outputItems.add(processItem(item))
-                    }
-
-                    pass++
-                    fraction += fractionPortion
-                },
-                EmptyProgressIndicator())
-            return outputItems
-        }
+class WithProgressProcessor(private val progress: ProgressIndicator?, private val files: List<PsiJavaFile>?) {
+    companion object {
+        val DEFAULT = WithProgressProcessor(null, null)
     }
 
-    private class ProgressPortionReporter(
-        indicator: ProgressIndicator,
-        private val start: Double,
-        private val portion: Double
-    ) : DelegatingProgressIndicator(indicator) {
+    private val progressText = "Converting Java to Kotlin"
+    private val fileCount = files?.size ?: 0
+    private val fileCountText = fileCount.toString() + " " + if (fileCount > 1) "files" else "file"
+    private var fraction = 0.0
+    private var pass = 1
 
-        init {
-            fraction = 0.0
-        }
+    fun <TInputItem, TOutputItem> processItems(
+        fractionPortion: Double,
+        inputItems: Iterable<TInputItem>,
+        processItem: (TInputItem) -> TOutputItem
+    ): List<TOutputItem> {
+        val outputItems = ArrayList<TOutputItem>()
+        // we use special process with EmptyProgressIndicator to avoid changing text in our progress by inheritors search inside etc
+        ProgressManager.getInstance().runProcess(
+            {
+                progress?.text = "$progressText ($fileCountText) - pass $pass of 3"
 
-        override fun start() {
-            fraction = 0.0
-        }
+                for ((i, item) in inputItems.withIndex()) {
+                    progress?.checkCanceled()
+                    progress?.fraction = fraction + fractionPortion * i / fileCount
 
-        override fun stop() {
-            fraction = portion
-        }
+                    progress?.text2 = files!![i].virtualFile.presentableUrl
 
-        override fun setFraction(fraction: Double) {
-            super.setFraction(start + (fraction * portion))
-        }
+                    outputItems.add(processItem(item))
+                }
 
-        override fun getFraction(): Double {
-            return (super.getFraction() - start) / portion
-        }
+                pass++
+                fraction += fractionPortion
+            },
+            EmptyProgressIndicator()
+        )
+        return outputItems
+    }
+}
 
-        override fun setText(text: String?) {
-        }
+private class ProgressPortionReporter(
+    indicator: ProgressIndicator,
+    private val start: Double,
+    private val portion: Double
+) : DelegatingProgressIndicator(indicator) {
 
-        override fun setText2(text: String?) {
-        }
+    init {
+        fraction = 0.0
     }
 
-    // Copied from com.intellij.ide.util.DelegatingProgressIndicator
-    private open class DelegatingProgressIndicator : WrappedProgressIndicator, StandardProgressIndicator {
-        protected val delegate: ProgressIndicator
+    override fun start() {
+        fraction = 0.0
+    }
 
-        constructor(indicator: ProgressIndicator) {
-            delegate = indicator
-        }
+    override fun stop() {
+        fraction = portion
+    }
+
+    override fun setFraction(fraction: Double) {
+        super.setFraction(start + (fraction * portion))
+    }
+
+    override fun getFraction(): Double {
+        return (super.getFraction() - start) / portion
+    }
+
+    override fun setText(text: String?) {
+    }
+
+    override fun setText2(text: String?) {
+    }
+}
+
+// Copied from com.intellij.ide.util.DelegatingProgressIndicator
+open class DelegatingProgressIndicator : WrappedProgressIndicator, StandardProgressIndicator {
+    protected val delegate: ProgressIndicator
+
+    constructor(indicator: ProgressIndicator) {
+        delegate = indicator
+    }
 
         constructor() {
             // BUNCH: 181
@@ -320,49 +328,48 @@ class JavaToKotlinConverter(
             delegate = indicator ?: EmptyProgressIndicator()
         }
 
-        override fun start() = delegate.start()
-        override fun stop() = delegate.stop()
-        override fun isRunning() = delegate.isRunning
-        override fun cancel() = delegate.cancel()
-        override fun isCanceled() = delegate.isCanceled
+    override fun start() = delegate.start()
+    override fun stop() = delegate.stop()
+    override fun isRunning() = delegate.isRunning
+    override fun cancel() = delegate.cancel()
+    override fun isCanceled() = delegate.isCanceled
 
-        override fun setText(text: String?) {
-            delegate.text = text
-        }
-
-        override fun getText() = delegate.text
-
-        override fun setText2(text: String?) {
-            delegate.text2 = text
-        }
-
-        override fun getText2() = delegate.text2
-        override fun getFraction() = delegate.fraction
-
-        override fun setFraction(fraction: Double) {
-            delegate.fraction = fraction
-        }
-
-        override fun pushState() = delegate.pushState()
-        override fun popState() = delegate.popState()
-        override fun startNonCancelableSection() = delegate.startNonCancelableSection()
-        override fun finishNonCancelableSection() = delegate.finishNonCancelableSection()
-        override fun isModal() = delegate.isModal
-        override fun getModalityState() = delegate.modalityState
-
-        override fun setModalityProgress(modalityProgress: ProgressIndicator?) {
-            delegate.setModalityProgress(modalityProgress)
-        }
-
-        override fun isIndeterminate() = delegate.isIndeterminate
-
-        override fun setIndeterminate(indeterminate: Boolean) {
-            delegate.isIndeterminate = indeterminate
-        }
-
-        override fun checkCanceled() = delegate.checkCanceled()
-        override fun getOriginalProgressIndicator() = delegate
-        override fun isPopupWasShown() = delegate.isPopupWasShown
-        override fun isShowing() = delegate.isShowing
+    override fun setText(text: String?) {
+        delegate.text = text
     }
-}
+
+    override fun getText() = delegate.text
+
+    override fun setText2(text: String?) {
+        delegate.text2 = text
+    }
+
+    override fun getText2() = delegate.text2
+    override fun getFraction() = delegate.fraction
+
+    override fun setFraction(fraction: Double) {
+        delegate.fraction = fraction
+    }
+
+    override fun pushState() = delegate.pushState()
+    override fun popState() = delegate.popState()
+    override fun startNonCancelableSection() = delegate.startNonCancelableSection()
+    override fun finishNonCancelableSection() = delegate.finishNonCancelableSection()
+    override fun isModal() = delegate.isModal
+    override fun getModalityState() = delegate.modalityState
+
+    override fun setModalityProgress(modalityProgress: ProgressIndicator?) {
+        delegate.setModalityProgress(modalityProgress)
+    }
+
+    override fun isIndeterminate() = delegate.isIndeterminate
+
+    override fun setIndeterminate(indeterminate: Boolean) {
+        delegate.isIndeterminate = indeterminate
+    }
+
+    override fun checkCanceled() = delegate.checkCanceled()
+    override fun getOriginalProgressIndicator() = delegate
+    override fun isPopupWasShown() = delegate.isPopupWasShown
+    override fun isShowing() = delegate.isShowing
+}

j2k/src/org/jetbrains/kotlin/j2k/JavaToKotlinTranslator.kt

@@ -45,7 +45,7 @@ object JavaToKotlinTranslator {
     fun generateKotlinCode(javaCode: String, project: Project): String {
         val file = createFile(javaCode, project)
         if (file is PsiJavaFile) {
-            val converter = JavaToKotlinConverter(file.project, ConverterSettings.defaultSettings, EmptyJavaToKotlinServices)
+            val converter = OldJavaToKotlinConverter(file.project, ConverterSettings.defaultSettings, EmptyJavaToKotlinServices)
             return prettify(converter.elementsToKotlin(listOf(file)).results.single()!!.text) //TODO: imports
         }
         return ""

j2k/tests/org/jetbrains/kotlin/j2k/AbstractJavaToKotlinConverterMultiFileTest.kt

@@ -53,7 +53,7 @@ abstract class AbstractJavaToKotlinConverterMultiFileTest : AbstractJavaToKotlin
             assert(psiFile is PsiJavaFile || psiFile is KtFile)
         }
 
-        val converter = JavaToKotlinConverter(project, ConverterSettings.defaultSettings, IdeaJavaToKotlinServices)
+        val converter = OldJavaToKotlinConverter(project, ConverterSettings.defaultSettings, IdeaJavaToKotlinServices)
         val (results, externalCodeProcessor) = converter.filesToKotlin(psiFilesToConvert, J2kPostProcessor(formatCode = true))
 
         val process = externalCodeProcessor?.prepareWriteOperation(EmptyProgressIndicator())

j2k/tests/org/jetbrains/kotlin/j2k/AbstractJavaToKotlinConverterSingleFileTest.kt

@@ -110,7 +110,7 @@ abstract class AbstractJavaToKotlinConverterSingleFileTest : AbstractJavaToKotli
 
     protected open fun fileToKotlin(text: String, settings: ConverterSettings, project: Project): String {
         val file = createJavaFile(text)
-        val converter = JavaToKotlinConverter(project, settings, IdeaJavaToKotlinServices)
+        val converter = OldJavaToKotlinConverter(project, settings, IdeaJavaToKotlinServices)
         return converter.filesToKotlin(listOf(file), J2kPostProcessor(formatCode = true)).results.single()
     }
 

nj2k/build.gradle.kts

@@ -20,7 +20,7 @@ dependencies {
     compileOnly(intellijCoreDep()) { includeJars("intellij-core") }
 
     testCompile(project(":idea"))
-    compile(project(":nj2k:nj2k-services"))
+    testCompile(project(":nj2k:nj2k-services"))
     testCompile(projectTests(":idea:idea-test-framework"))
     testCompile(project(":compiler:light-classes"))
     testCompile(project(":kotlin-test:kotlin-test-junit"))
@@ -93,3 +93,6 @@ fun configureFreeCompilerArg(isEnabled: Boolean, compilerArgument: String) {
         }
     }
 }
+
+ideaPlugin()
+

nj2k/nj2k-services/build.gradle.kts

@@ -28,6 +28,7 @@ dependencies {
     compile(project(":compiler:plugin-api"))
     compile(project(":eval4j"))
     compile(project(":j2k"))
+    compile(project(":nj2k"))
     compile(project(":idea"))
     compile(project(":idea:formatter"))
     compile(project(":idea:fir-view"))
@@ -74,3 +75,4 @@ sourceSets {
     "main" { projectDefault() }
 }
 
+ideaPlugin()

nj2k/nj2k-services/src/org/jetbrains/kotlin/nj2k/NewJ2kConveterExtension.kt

@@ -0,0 +1,18 @@
+package org.jetbrains.kotlin.nj2k
+
+import com.intellij.openapi.project.Project
+import org.jetbrains.kotlin.j2k.*
+
+class NewJ2kConverterExtension : J2kConverterExtension() {
+    override val isNewJ2k = true
+
+    override fun createJavaToKotlinConverter(
+        project: Project,
+        settings: ConverterSettings,
+        services: JavaToKotlinConverterServices
+    ): JavaToKotlinConverter =
+        NewJavaToKotlinConverter(project, settings, services)
+
+    override fun createPostProcessor(formatCode: Boolean, settings: ConverterSettings): PostProcessor =
+        NewJ2kPostProcessor(formatCode, settings)
+}

nj2k/src/org/jetbrains/kotlin/nj2k/JKSymbolProvider.kt

@@ -28,8 +28,8 @@ class JKSymbolProvider {
 
     private val elementVisitor = ElementVisitor()
 
-    fun preBuildTree(files: List<PsiJavaFile>) {
-        files.forEach { it.accept(elementVisitor) }
+    fun preBuildTree(inputElements: List<PsiElement>) {
+        inputElements.forEach { it.accept(elementVisitor) }
     }
 
     private fun symbolForNonKotlinElement(psi: PsiElement) =

nj2k/src/org/jetbrains/kotlin/nj2k/NewJavaToKotlinConverter.kt

@@ -16,20 +16,21 @@
 
 package org.jetbrains.kotlin.nj2k
 
-import com.intellij.openapi.progress.EmptyProgressIndicator
-import com.intellij.openapi.progress.ProgressIndicator
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiElement
-import com.intellij.psi.PsiJavaFile
-import org.jetbrains.kotlin.j2k.ConverterSettings
+import org.jetbrains.kotlin.j2k.*
 import org.jetbrains.kotlin.nj2k.tree.JKTreeElement
 import org.jetbrains.kotlin.nj2k.tree.prettyDebugPrintTree
+import org.jetbrains.kotlin.psi.KtPsiFactory
 
 class NewJavaToKotlinConverter(
     val project: Project,
     val settings: ConverterSettings,
-    val converterServices: NewJavaToKotlinServices
-) {
+    val oldConverterServices: JavaToKotlinConverterServices
+) : JavaToKotlinConverter(project) {
+    val converterServices = object : NewJavaToKotlinServices {
+        override val oldServices = oldConverterServices
+    }
 
     private fun List<JKTreeElement>.prettyPrintTrees() = buildString {
         for (tree in this@prettyPrintTrees) {
@@ -39,25 +40,25 @@ class NewJavaToKotlinConverter(
         }
     }
 
-    fun filesToKotlin(files: List<PsiJavaFile>, progressIndicator: ProgressIndicator = EmptyProgressIndicator()): List<String> {
+    override fun elementsToKotlin(inputElements: List<PsiElement>, processor: WithProgressProcessor): Result {
         val symbolProvider = JKSymbolProvider()
-        symbolProvider.preBuildTree(files)
+        symbolProvider.preBuildTree(inputElements)
         val treeBuilder = JavaToJKTreeBuilder(symbolProvider, converterServices)
-        val fileTrees = files.mapNotNull(treeBuilder::buildTree)
-
-//        println(fileTrees.prettyPrintTrees())
+        val asts = inputElements.mapNotNull(treeBuilder::buildTree)
+        val factory = KtPsiFactory(project, true)
 
         val context = ConversionContext(
             symbolProvider,
             this,
-            { it: PsiElement -> it.containingFile in files }
+            { it.containingFile in inputElements }
+        )
+        ConversionsRunner.doApply(asts, context)
+        val kotlinCodes = asts.map { NewCodeBuilder().run { printCodeOut(it) } }
+        return Result(
+            kotlinCodes.map { code ->
+                ElementResult(code, emptySet(), ParseContext.TOP_LEVEL)
+            },
+            null
         )
-
-        ConversionsRunner.doApply(fileTrees, context)
-
-//        val resultTree = fileTrees.prettyPrintTrees()
-//        println(resultTree)
-
-        return fileTrees.map { NewCodeBuilder().run { printCodeOut(it) } }
     }
 }

nj2k/tests/org/jetbrains/kotlin/nj2k/AbstractNewJavaToKotlinConverterSingleFileTest.kt

@@ -18,7 +18,7 @@ package org.jetbrains.kotlin.nj2k
 
 import com.intellij.openapi.command.CommandProcessor
 import com.intellij.openapi.project.Project
-import org.jetbrains.kotlin.idea.nj2k.NewJ2kPostProcessor
+import org.jetbrains.kotlin.idea.j2k.IdeaJavaToKotlinServices
 import org.jetbrains.kotlin.j2k.AbstractJavaToKotlinConverterSingleFileTest
 import org.jetbrains.kotlin.j2k.ConverterSettings
 import org.jetbrains.kotlin.psi.KtPsiFactory
@@ -32,14 +32,15 @@ abstract class AbstractNewJavaToKotlinConverterSingleFileTest : AbstractJavaToKo
         val postProcessor = NewJ2kPostProcessor(true, settings)
 
 
-        return NewJavaToKotlinConverter(project, settings, IdeaNewJavaToKotlinServices).filesToKotlin(listOf(file)).map {
-            factory.createFileWithLightClassSupport("Dummy.kt", it, file)
-        }.map {
-            CommandProcessor.getInstance().runUndoTransparentAction {
-                postProcessor.doAdditionalProcessing(it, null)
+        return NewJavaToKotlinConverter(project, settings, IdeaJavaToKotlinServices)
+            .filesToKotlin(listOf(file), NewJ2kPostProcessor(true, settings)).let { (results, _) ->
+                factory.createFileWithLightClassSupport("Dummy.kt", results.single(), file)
+            }.let {
+                CommandProcessor.getInstance().runUndoTransparentAction {
+                    postProcessor.doAdditionalProcessing(it, null)
+                }
+                it.text
             }
-            it.text
-        }.single()
     }
 
     override fun provideExpectedFile(javaPath: String): File =