Add initial version of Kotlin as Java plugin

8 files changed, 378 insertions, 418 deletions

diff --git a/plugins/kotlin-as-java/src/main/kotlin/JavaSignatureProvider.kt b/plugins/kotlin-as-java/src/main/kotlin/JavaSignatureProvider.kt
new file mode 100644
index 00000000..526546f2
--- /dev/null
+++ b/plugins/kotlin-as-java/src/main/kotlin/JavaSignatureProvider.kt
@@ -0,0 +1,112 @@
+package org.jetbrains.dokka.kotlinAsJava
+
+import org.jetbrains.dokka.base.signatures.SignatureProvider
+import org.jetbrains.dokka.base.transformers.pages.comments.CommentsToContentConverter
+import org.jetbrains.dokka.base.translators.documentables.PageContentBuilder
+import org.jetbrains.dokka.links.DRI
+import org.jetbrains.dokka.links.sureClassNames
+import org.jetbrains.dokka.model.*
+import org.jetbrains.dokka.model.Annotation
+import org.jetbrains.dokka.model.Enum
+import org.jetbrains.dokka.model.Function
+import org.jetbrains.dokka.pages.ContentKind
+import org.jetbrains.dokka.pages.ContentNode
+import org.jetbrains.dokka.pages.PlatformData
+import org.jetbrains.dokka.utilities.DokkaLogger
+
+class JavaSignatureProvider(ctcc: CommentsToContentConverter, logger: DokkaLogger) : SignatureProvider {
+    private val contentBuilder = PageContentBuilder(ctcc, logger)
+
+    override fun signature(documentable: Documentable): List<ContentNode> = when (documentable) {
+        is Function -> signature(documentable)
+        is Classlike -> signature(documentable)
+        else -> throw NotImplementedError(
+            "Cannot generate signature for ${documentable::class.qualifiedName} ${documentable.name}"
+        )
+    }
+
+    private fun signature(f: Function) = f.platformData.map { signature(f, it) }.distinct()
+
+    private fun signature(c: Classlike) = c.platformData.map { signature(c, it) }.distinct()
+
+    private fun signature(c: Classlike, platform: PlatformData) = contentBuilder.contentFor(c, ContentKind.Symbol) {
+        text(c.visibility[platform]?.externalDisplayName ?: "")
+        if (c is Class) {
+            text(c.modifier.toString())
+        }
+        when (c) {
+            is Class -> text(" class ")
+            is Interface -> text(" interface ")
+            is Enum -> text(" enum ")
+            is Object -> text(" class ")
+            is Annotation -> text(" @interface ")
+        }
+        text(c.name!!)
+        if (c is WithSupertypes) {
+            list(c.supertypes.getValue(platform), prefix = " : ") {
+                link(it.sureClassNames, it)
+            }
+        }
+    }
+
+    private fun signature(f: Function, platform: PlatformData) = contentBuilder.contentFor(f, ContentKind.Symbol) {
+        text(f.visibility[platform]?.externalDisplayName ?: "")
+        text(f.modifier.toString())
+        val returnType = f.type
+        if (!f.isConstructor && returnType.constructorFqName != Unit::class.qualifiedName) {
+            text(": ")
+            type(returnType)
+        }
+        text("  ")
+        link(f.name, f.dri)
+        val generics = f.generics.filterOnPlatform(platform)
+        if (generics.isNotEmpty()) {
+            text("<")
+            generics.forEach {
+                signature(it)
+            }
+            text(">")
+        }
+        text("(")
+        list(listOfNotNull(f.receiver) + f.parameters.filterOnPlatform(platform)) {
+            type(it.type)
+            text(" ")
+            link(it.name!!, it.dri)
+            text(", ")
+        }
+        text(")")
+    }
+
+    private fun signature(t: TypeParameter) = contentBuilder.contentFor(t, ContentKind.Symbol) {
+        link(t.name, t.dri)
+        if (t.bounds.isNotEmpty()) {
+            text("<")
+            t.bounds.forEach {
+                signature(it, t.dri, t.platformData)
+            }
+            text(">")
+        }
+    }
+
+    private fun signature(p: Projection, dri: DRI, platforms: List<PlatformData>): List<ContentNode> = when (p) {
+        is OtherParameter -> contentBuilder.contentFor(dri, platforms.toSet()) { text(p.name) }.children
+
+        is TypeConstructor -> contentBuilder.contentFor(dri, platforms.toSet()) {
+            link(p.dri.classNames.orEmpty(), p.dri)
+        }.children + p.projections.flatMap { signature(it, dri, platforms) }
+
+        is Variance -> contentBuilder.contentFor(dri, platforms.toSet()) {
+            text(p.kind.toString() + " ")
+        }.children + signature(p.inner, dri, platforms)
+
+        is Star -> contentBuilder.contentFor(dri, platforms.toSet()) { text("*") }.children
+
+        is Nullable -> signature(p.inner, dri, platforms) + contentBuilder.contentFor(
+            dri,
+            platforms.toSet()
+        ) { text("?") }.children
+    }
+
+    private fun <T : Documentable> Collection<T>.filterOnPlatform(platformData: PlatformData) =
+        this.filter { it.platformData.contains(platformData) }
+}
\ No newline at end of file
diff --git a/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaDescriptorToDocumentableTranslator.kt b/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaDescriptorToDocumentableTranslator.kt
deleted file mode 100644
index 3b615dcb..00000000
--- a/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaDescriptorToDocumentableTranslator.kt
+++ /dev/null
@@ -1,76 +0,0 @@
-package  org.jetbrains.dokka.kotlinAsJava
-
-import org.jetbrains.dokka.analysis.DokkaResolutionFacade
-import org.jetbrains.dokka.base.translators.descriptors.DRIWithPlatformInfo
-import org.jetbrains.dokka.base.translators.descriptors.DokkaDescriptorVisitor
-import org.jetbrains.dokka.base.translators.descriptors.withEmptyInfo
-import org.jetbrains.dokka.links.Callable
-import org.jetbrains.dokka.links.DRI
-import org.jetbrains.dokka.links.withClass
-import org.jetbrains.dokka.model.*
-import org.jetbrains.dokka.model.Function
-import org.jetbrains.dokka.pages.PlatformData
-import org.jetbrains.dokka.plugability.DokkaContext
-import org.jetbrains.dokka.transformers.descriptors.DescriptorToDocumentableTranslator
-import org.jetbrains.kotlin.descriptors.*
-
-class KotlinAsJavaDescriptorToDocumentableTranslator(
-    private val context: DokkaContext
-) : DescriptorToDocumentableTranslator {
-    override fun invoke(
-        moduleName: String,
-        packageFragments: Iterable<PackageFragmentDescriptor>,
-        platformData: PlatformData
-    ): Module =
-        KotlinAsJavaDokkaDescriptorVisitor(platformData, context.platforms[platformData]?.facade!!).run {
-            packageFragments.map { visitPackageFragmentDescriptor(it, DRI.topLevel.withEmptyInfo()) }
-        }.let { Module(moduleName, it) }
-}
-
-class KotlinAsJavaDokkaDescriptorVisitor(
-    platformData: PlatformData,
-    resolutionFacade: DokkaResolutionFacade
-) : DokkaDescriptorVisitor(platformData, resolutionFacade) {
-    override fun visitPackageFragmentDescriptor(
-        descriptor: PackageFragmentDescriptor,
-        parent: DRIWithPlatformInfo
-    ): Package {
-        val dri = DRI(packageName = descriptor.fqName.asString())
-        DescriptorCache.add(dri, descriptor)
-        return super.visitPackageFragmentDescriptor(descriptor, parent)
-    }
-
-    override fun visitClassDescriptor(descriptor: ClassDescriptor, parent: DRIWithPlatformInfo): Classlike {
-        val dri = parent.dri.withClass(descriptor.name.asString())
-        DescriptorCache.add(dri, descriptor)
-        return super.visitClassDescriptor(descriptor, parent)
-    }
-
-    override fun visitPropertyDescriptor(descriptor: PropertyDescriptor, parent: DRIWithPlatformInfo): Property {
-        val dri = parent.dri.copy(callable = Callable.from(descriptor))
-        DescriptorCache.add(dri, descriptor)
-        return super.visitPropertyDescriptor(descriptor, parent)
-    }
-
-    override fun visitFunctionDescriptor(descriptor: FunctionDescriptor, parent: DRIWithPlatformInfo): Function {
-        val dri = parent.dri.copy(callable = Callable.from(descriptor))
-        DescriptorCache.add(dri, descriptor)
-        return super.visitFunctionDescriptor(descriptor, parent)
-    }
-
-    override fun visitConstructorDescriptor(descriptor: ConstructorDescriptor, parent: DRIWithPlatformInfo): Function {
-        val dri = parent.dri.copy(callable = Callable.from(descriptor))
-        DescriptorCache.add(dri, descriptor)
-        return super.visitConstructorDescriptor(descriptor, parent)
-    }
-
-    override fun visitPropertyAccessorDescriptor(
-        descriptor: PropertyAccessorDescriptor,
-        propertyDescriptor: PropertyDescriptor,
-        parent: DRI
-    ): Function {
-        val dri = parent.copy(callable = Callable.from(descriptor))
-        DescriptorCache.add(dri, descriptor)
-        return super.visitPropertyAccessorDescriptor(descriptor, propertyDescriptor, parent)
-    }
-}
\ No newline at end of file
diff --git a/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaPageBuilder.kt b/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaPageBuilder.kt
deleted file mode 100644
index ef6f9c33..00000000
--- a/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaPageBuilder.kt
+++ /dev/null
@@ -1,81 +0,0 @@
-package org.jetbrains.dokka.kotlinAsJava
-
-import org.jetbrains.dokka.base.translators.documentables.DefaultPageBuilder
-import org.jetbrains.dokka.base.translators.documentables.RootContentBuilder
-import org.jetbrains.dokka.kotlinAsJava.conversions.asJava
-import org.jetbrains.dokka.kotlinAsJava.conversions.asStatic
-import org.jetbrains.dokka.kotlinAsJava.conversions.withClass
-import org.jetbrains.dokka.links.DRI
-import org.jetbrains.dokka.links.withClass
-import org.jetbrains.dokka.model.*
-import org.jetbrains.dokka.model.Enum
-import org.jetbrains.dokka.model.Function
-import org.jetbrains.dokka.pages.*
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
-import org.jetbrains.kotlin.descriptors.Visibilities
-import org.jetbrains.kotlin.js.resolve.diagnostics.findPsi
-
-fun DeclarationDescriptor.sourceLocation(): String? = this.findPsi()?.containingFile?.virtualFile?.path
-fun <T : Documentable> List<T>.groupedByLocation(): Map<String, List<T>> =
-    this.map { DescriptorCache[it.dri]?.sourceLocation() to it }
-        .filter { it.first != null }.groupBy({ (location, _) ->
-            location!!.let { it.split("/").last().split(".").first() + "Kt" }
-        }) { it.second }
-
-fun PlatformInfo.toClassPlatformInfo(inherited: List<DRI> = emptyList()) =
-    ClassPlatformInfo(this, emptyList())
-
-class KotlinAsJavaPageBuilder(rootContentGroup: RootContentBuilder) : DefaultPageBuilder(rootContentGroup) {
-
-    override fun pageForModule(m: Module): ModulePageNode =
-        ModulePageNode(m.name.ifEmpty { "root" }, contentForModule(m), m, m.packages.map { pageForPackage(it) })
-
-    data class FunsAndProps(val key: String, val funs: List<Function>, val props: List<Property>)
-
-    override fun pageForPackage(p: Package): PackagePageNode {
-
-        val funs = p.functions.groupedByLocation()
-
-        val props = p.properties.groupedByLocation()
-
-        val zipped = (funs.keys + props.keys)
-            .map { k -> FunsAndProps(k, funs[k].orEmpty(), props[k].orEmpty()) }
-
-        val classes = (p.classlikes + zipped.map { (key, funs, props) ->
-            val dri = p.dri.withClass(key)
-            val actual =
-                (funs.flatMap { it.actual } + props.flatMap { it.actual }).distinct().map { it.toClassPlatformInfo() }
-            Class(
-                dri = dri,
-                name = key,
-                kind = KotlinClassKindTypes.CLASS,
-                constructors = emptyList(),
-                functions = funs.map { it.withClass(key, dri).asStatic() },
-                properties = props.map { it.withClass(key, dri) },
-                classlikes = emptyList(),
-                actual = actual,
-                expected = null,
-                visibility = p.platformData.map { it to Visibilities.PUBLIC }.toMap()
-            )
-        }).map { it.asJava() }
-
-        return PackagePageNode(
-            p.name, contentForPackage(p, classes), setOf(p.dri), p,
-            classes.map(::pageForClasslike)
-        )
-    }
-
-    private fun contentForPackage(p: Package, nClasses: List<Classlike>) = group(p) {
-        header(1) { text("Package ${p.name}") }
-        block("Types", 2, ContentKind.Properties, nClasses, p.platformData) {
-            link(it.name, it.dri)
-            text(it.briefDocTagString)
-        }
-    }
-
-    override fun contentForClasslike(c: Classlike): ContentGroup = when (c) {
-        is Class -> contentForClass(c)
-        is Enum -> contentForEnum(c)
-        else -> throw IllegalStateException("$c should not be present here")
-    }
-}
\ No newline at end of file
diff --git a/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaPageContentBuilder.kt b/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaPageContentBuilder.kt
deleted file mode 100644
index a8ec7126..00000000
--- a/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaPageContentBuilder.kt
+++ /dev/null
@@ -1,73 +0,0 @@
-package org.jetbrains.dokka.kotlinAsJava
-
-import org.jetbrains.dokka.base.translators.documentables.DefaultPageContentBuilder
-import org.jetbrains.dokka.base.translators.documentables.PageContentBuilderFunction
-import org.jetbrains.dokka.base.translators.documentables.type
-import org.jetbrains.dokka.base.transformers.pages.comments.CommentsToContentConverter
-import org.jetbrains.dokka.links.DRI
-import org.jetbrains.dokka.model.Function
-import org.jetbrains.dokka.model.JavaTypeWrapper
-import org.jetbrains.dokka.pages.*
-import org.jetbrains.dokka.utilities.DokkaLogger
-
-class KotlinAsJavaPageContentBuilder(
-    dri: Set<DRI>,
-    platformData: Set<PlatformData>,
-    kind: Kind,
-    commentsConverter: CommentsToContentConverter,
-    logger: DokkaLogger,
-    styles: Set<Style> = emptySet(),
-    extras: Set<Extra> = emptySet()
-) : DefaultPageContentBuilder(dri, platformData, kind, commentsConverter, logger, styles, extras) {
-
-    override fun signature(f: Function) = signature(f) {
-
-        //        DokkaConsoleLogger.info("KotlinAsJavaSignature")
-        val returnType = f.returnType
-        if (!f.isConstructor) {
-            if (returnType != null &&
-                returnType.constructorFqName != Unit::class.qualifiedName
-            ) {
-                if ((returnType as? JavaTypeWrapper)?.isPrimitive == true)
-                    text(returnType.constructorFqName ?: "")
-                else
-                    type(returnType)
-                text(" ")
-            } else text("void ")
-
-        }
-
-        link(f.name, f.dri)
-        text("(")
-        val params = listOfNotNull(f.receiver) + f.parameters
-        list(params) {
-            if ((it.type as? JavaTypeWrapper)?.isPrimitive == true)
-                text(it.type.constructorFqName ?: "")
-            else
-                type(it.type)
-
-            text(" ")
-            link(it.name ?: "receiver", it.dri)
-        }
-        text(")")
-    }
-
-    override fun group(
-        dri: Set<DRI>,
-        platformData: Set<PlatformData>,
-        kind: Kind,
-        block: PageContentBuilderFunction
-    ): ContentGroup = group(dri, platformData, kind, commentsConverter, logger, block)
-
-    companion object {
-        fun group(
-            dri: Set<DRI>,
-            platformData: Set<PlatformData>,
-            kind: Kind,
-            commentsConverter: CommentsToContentConverter,
-            logger: DokkaLogger,
-            block: PageContentBuilderFunction
-        ): ContentGroup =
-            KotlinAsJavaPageContentBuilder(dri, platformData, kind, commentsConverter, logger).apply(block).build()
-    }
-}
\ No newline at end of file
diff --git a/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaPlugin.kt b/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaPlugin.kt
index 1a6bc0db..0ca278ce 100644
--- a/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaPlugin.kt
+++ b/plugins/kotlin-as-java/src/main/kotlin/KotlinAsJavaPlugin.kt
@@ -1,47 +1,18 @@
-package  org.jetbrains.dokka.kotlinAsJava
-
+package org.jetbrains.dokka.kotlinAsJava
 
 import org.jetbrains.dokka.CoreExtensions
 import org.jetbrains.dokka.base.DokkaBase
-import org.jetbrains.dokka.links.DRI
-import org.jetbrains.dokka.model.Module
-import org.jetbrains.dokka.pages.ModulePageNode
-import org.jetbrains.dokka.plugability.DokkaContext
+import org.jetbrains.dokka.kotlinAsJava.transformers.KotlinAsJavaDocumentableTransformer
 import org.jetbrains.dokka.plugability.DokkaPlugin
-import org.jetbrains.dokka.plugability.plugin
-import org.jetbrains.dokka.plugability.querySingle
-import org.jetbrains.dokka.transformers.documentation.DocumentableToPageTranslator
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 
 class KotlinAsJavaPlugin : DokkaPlugin() {
-    val kotlinAsJavaDescriptorToDocumentableTranslator by extending {
-        CoreExtensions.descriptorToDocumentableTranslator providing ::KotlinAsJavaDescriptorToDocumentableTranslator
-    }
     val kotlinAsJavaDocumentableToPageTranslator by extending {
-        CoreExtensions.documentableToPageTranslator providing ::KotlinAsJavaDocumentationToPageTranslator
+        CoreExtensions.documentableTransformer with KotlinAsJavaDocumentableTransformer()
+    }
+    val javaSignatureProvider by extending {
+        val dokkaBasePlugin = plugin<DokkaBase>()
+        dokkaBasePlugin.signatureProvider providing { ctx ->
+            JavaSignatureProvider(ctx.single(dokkaBasePlugin.commentsToContentConverter), ctx.logger)
+        }
     }
-}
-
-object DescriptorCache {
-    private val cache: HashMap<DRI, DeclarationDescriptor> = HashMap()
-
-    fun add(dri: DRI, descriptor: DeclarationDescriptor): Boolean = cache.putIfAbsent(dri, descriptor) == null
-    operator fun get(dri: DRI): DeclarationDescriptor? = cache[dri]
-}
-
-class KotlinAsJavaDocumentationToPageTranslator(
-    private val context: DokkaContext
-) : DocumentableToPageTranslator {
-    override fun invoke(module: Module): ModulePageNode =
-        KotlinAsJavaPageBuilder { node, kind, operation ->
-            KotlinAsJavaPageContentBuilder.group(
-                setOf(node.dri),
-                node.platformData,
-                kind,
-                context.plugin<DokkaBase>().querySingle { commentsToContentConverter },
-                context.logger,
-                operation
-            )
-        }.pageForModule(module)
-
 }
\ No newline at end of file
diff --git a/plugins/kotlin-as-java/src/main/kotlin/KotlinToJVMResolver.kt b/plugins/kotlin-as-java/src/main/kotlin/KotlinToJVMResolver.kt
deleted file mode 100644
index 7b0495e9..00000000
--- a/plugins/kotlin-as-java/src/main/kotlin/KotlinToJVMResolver.kt
+++ /dev/null
@@ -1,150 +0,0 @@
-package org.jetbrains.dokka.kotlinAsJava.conversions
-
-import org.jetbrains.dokka.kotlinAsJava.DescriptorCache
-import org.jetbrains.dokka.links.*
-import org.jetbrains.dokka.model.*
-import org.jetbrains.dokka.model.Function
-import org.jetbrains.dokka.model.Enum
-import org.jetbrains.kotlin.builtins.jvm.JavaToKotlinClassMap
-import org.jetbrains.kotlin.descriptors.FunctionDescriptor
-import org.jetbrains.kotlin.descriptors.PropertyDescriptor
-import org.jetbrains.kotlin.name.ClassId
-import org.jetbrains.kotlin.name.FqName
-import org.jetbrains.kotlin.resolve.jvm.JvmPrimitiveType
-
-fun String.getAsPrimitive(): JvmPrimitiveType? = org.jetbrains.kotlin.builtins.PrimitiveType.values()
-    .find { it.typeFqName.asString() == this }
-    ?.let { JvmPrimitiveType.get(it) }
-
-fun TypeWrapper.getAsType(classId: ClassId, fqName: String, top: Boolean): TypeWrapper {
-    val fqNameSplitted = fqName.takeIf { top }?.getAsPrimitive()?.name?.toLowerCase()
-        ?.let { listOf(it) } ?: classId.asString().split("/")
-    return JavaTypeWrapper(
-        fqNameSplitted,
-        arguments.mapNotNull { it.asJava(false) },
-        classId.toDRI(dri),
-        fqNameSplitted.last()[0].isLowerCase()
-    )
-}
-
-fun TypeWrapper?.asJava(top: Boolean = true): TypeWrapper? = this?.constructorFqName
-    ?.takeUnless { it.endsWith(".Unit") }
-    ?.let { fqName ->
-        fqName.mapToJava()
-            ?.let { getAsType(it, fqName, top) } ?: this
-    }
-
-fun Classlike.asJava(): Classlike = when {
-    this is Class -> this.asJava()
-    this is Enum -> this.asJava()
-    this is EnumEntry -> this
-    else -> throw IllegalArgumentException("$this shouldn't be here")
-}
-
-fun Class.asJava(): Class = Class(
-    dri, name, kind,
-    constructors.map { it.asJava() },
-    (functions + properties.flatMap { it.accessors }).map { it.asJava() },
-    properties, classlikes.mapNotNull { (it as? Class)?.asJava() }, expected, actual, extra, visibility
-)
-
-fun Enum.asJava(): Enum = Enum(
-    dri = dri,
-    name = name,
-    entries = entries.mapNotNull { it.asJava() as? EnumEntry },
-    constructors = constructors.map(Function::asJava),
-    functions = (functions + properties.flatMap { it.accessors }).map(Function::asJava),
-    properties = properties,
-    classlikes = classlikes.map(Classlike::asJava),
-    expected = expected,
-    actual = actual,
-    extra = extra,
-    visibility = visibility
-)
-
-fun tcAsJava(tc: TypeConstructor): TypeReference =
-    tc.fullyQualifiedName.mapToJava()
-        ?.let {
-            tc.copy(
-                fullyQualifiedName = it.asString(),
-                params = tc.params.map { it.asJava() }
-            )
-        } ?: tc
-
-fun tpAsJava(tp: TypeParam): TypeReference =
-    tp.copy(bounds = tp.bounds.map { it.asJava() })
-
-fun TypeReference.asJava(): TypeReference = when (this) {
-    is TypeConstructor -> tcAsJava(this)
-    is TypeParam -> tpAsJava(this)
-    else -> this
-}
-
-fun Callable.asJava(): Callable = copy(params = params.mapNotNull { (it as? TypeConstructor)?.asJava() })
-
-
-fun Parameter.asJava(): Parameter = Parameter(
-    dri.copy(callable = dri.callable?.asJava()),
-    name,
-    type.asJava()!!,
-    expected,
-    actual,
-    extra
-)
-
-fun Function.asJava(): Function {
-    val newName = when {
-        isConstructor -> "init"
-        else -> name
-    }
-    return Function(
-        dri.copy(callable = dri.callable?.asJava()),
-        newName,
-        returnType.asJava(),
-        isConstructor,
-        receiver,
-        parameters.map { it.asJava() },
-        expected,
-        actual,
-        extra,
-        visibility
-    )
-}
-
-private fun String.mapToJava(): ClassId? =
-    JavaToKotlinClassMap.mapKotlinToJava(FqName(this).toUnsafe())
-
-fun ClassId.toDRI(dri: DRI?): DRI = DRI(
-    packageName = packageFqName.asString(),
-    classNames = classNames(),
-    callable = dri?.callable?.asJava(),
-    extra = null,
-    target = null
-)
-
-fun ClassId.classNames(): String =
-    shortClassName.identifier + (outerClassId?.classNames()?.let { ".$it" } ?: "")
-
-fun Function.asStatic(): Function = also { it.extra.add(STATIC) }
-
-fun Property.withClass(className: String, dri: DRI): Property {
-    val nDri = dri.withClass(className).copy(
-        callable = getDescriptor()?.let { Callable.from(it) }
-    )
-    return Property(
-        nDri, name, receiver, expected, actual, extra, accessors, visibility
-    )
-}
-
-fun Function.withClass(className: String, dri: DRI): Function {
-    val nDri = dri.withClass(className).copy(
-        callable = getDescriptor()?.let { Callable.from(it) }
-    )
-    return Function(
-        nDri, name, returnType, isConstructor, receiver, parameters, expected, actual, extra, visibility
-    )
-}
-
-fun Function.getDescriptor(): FunctionDescriptor? = DescriptorCache[dri].let { it as? FunctionDescriptor }
-
-fun Property.getDescriptor(): PropertyDescriptor? = DescriptorCache[dri].let { it as? PropertyDescriptor }
diff --git a/plugins/kotlin-as-java/src/main/kotlin/converters/KotlinToJavaConverter.kt b/plugins/kotlin-as-java/src/main/kotlin/converters/KotlinToJavaConverter.kt
new file mode 100644
index 00000000..19c4ef19
--- /dev/null
+++ b/plugins/kotlin-as-java/src/main/kotlin/converters/KotlinToJavaConverter.kt
@@ -0,0 +1,246 @@
+package org.jetbrains.dokka.kotlinAsJava.converters
+
+import org.jetbrains.dokka.links.Callable
+import org.jetbrains.dokka.links.DRI
+import org.jetbrains.dokka.links.withClass
+import org.jetbrains.dokka.model.*
+import org.jetbrains.dokka.model.Annotation
+import org.jetbrains.dokka.model.Enum
+import org.jetbrains.dokka.model.Function
+import org.jetbrains.dokka.model.properties.PropertyContainer
+import org.jetbrains.kotlin.builtins.jvm.JavaToKotlinClassMap
+import org.jetbrains.kotlin.name.ClassId
+import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.resolve.jvm.JvmPrimitiveType
+
+private fun <T : WithExpectActual> List<T>.groupedByLocation() =
+    map { it.sources to it }
+        .groupBy({ (location, _) ->
+            location.let { it.map.entries.first().value.path.split("/").last().split(".").first() + "Kt" } // TODO: first() does not look reasonable
+        }) { it.second }
+
+internal fun Package.asJava(): Package {
+    @Suppress("UNCHECKED_CAST")
+    val syntheticClasses = ((properties + functions) as List<WithExpectActual>)
+        .groupedByLocation()
+        .map { (syntheticClassName, nodes) ->
+            Class(
+                dri = dri.withClass(syntheticClassName),
+                name = syntheticClassName,
+                properties = nodes.filterIsInstance<Property>().map { it.asJava() },
+                constructors = emptyList(),
+                functions = (
+                        nodes.filterIsInstance<Property>().map { it.javaAccessors() } +
+                                nodes.filterIsInstance<Function>().map { it.asJava(syntheticClassName) }
+                        ) as List<Function>, // TODO: methods are static and receiver is a param
+                classlikes = emptyList(),
+                sources = PlatformDependent.empty(),
+                visibility = PlatformDependent.empty(), // TODO: fix this with the new visibility model -> public
+                companion = null,
+                generics = emptyList(),
+                supertypes = PlatformDependent.empty(),
+                documentation = PlatformDependent.empty(),
+                modifier = WithAbstraction.Modifier.Final,
+                platformData = platformData,
+                extra = PropertyContainer.empty()
+            )
+        }
+
+    return copy(
+        functions = emptyList(),
+        properties = emptyList(),
+        classlikes = classlikes.map { it.asJava() } + syntheticClasses,
+        packages = packages.map { it.asJava() }
+    )
+}
+
+internal fun Property.asJava(isTopLevel: Boolean = false, relocateToClass: String? = null) =
+    copy(
+        dri = if (relocateToClass.isNullOrBlank()) {
+            dri
+        } else {
+            dri.withClass(relocateToClass)
+        },
+        modifier = if (setter == null) {
+            WithAbstraction.Modifier.Final
+        } else {
+            WithAbstraction.Modifier.Empty
+        },
+        type = type.asJava(isTopLevel), // TODO: check,
+        setter = null,
+        getter = null // Removing getters and setters as they will be available as functions
+    ) // TODO: visibility -> always private; if (isTopLevel) -> static
+
+internal fun Property.javaAccessors(isTopLevel: Boolean = false, relocateToClass: String? = null): List<Function> =
+    listOfNotNull(
+        getter?.copy(
+            dri = if (relocateToClass.isNullOrBlank()) {
+                dri
+            } else {
+                dri.withClass(relocateToClass)
+            },
+            name = "get" + name.capitalize(),
+            modifier = if (setter == null) {
+                WithAbstraction.Modifier.Final
+            } else {
+                WithAbstraction.Modifier.Empty
+            },
+            type = type.asJava(isTopLevel) // TODO: check,
+        ),
+        setter?.copy(
+            dri = if (relocateToClass.isNullOrBlank()) {
+                dri
+            } else {
+                dri.withClass(relocateToClass)
+            },
+            name = "set" + name.capitalize(),
+            modifier = if (setter == null) {
+                WithAbstraction.Modifier.Final
+            } else {
+                WithAbstraction.Modifier.Empty
+            },
+            type = type.asJava(isTopLevel) // TODO: check,
+        )
+    ) // TODO: if (isTopLevel) -> static; visibility -> always? public
+
+
+internal fun Function.asJava(containingClassName: String): Function {
+    val newName = when {
+        isConstructor -> containingClassName
+        else -> name
+    }
+    return copy(
+//        dri = dri.copy(callable = dri.callable?.asJava()),
+        name = newName,
+        type = type.asJava(),
+        parameters = parameters.map { it.asJava() }
+    ) // TODO: should receiver be the first param?
+}
+
+internal fun Classlike.asJava(): Classlike = when (this) {
+    is Class -> asJava()
+    is Enum -> asJava()
+    is Annotation -> asJava()
+    is Object -> asJava()
+    is Interface -> asJava()
+    else -> throw IllegalArgumentException("$this shouldn't be here")
+}
+
+internal fun Class.asJava(): Class = copy(
+    constructors = constructors.map { it.asJava(name) },
+    functions = (functions + properties.map { it.getter } + properties.map { it.setter }).filterNotNull().map {
+        it.asJava(
+            name
+        )
+    },
+    properties = properties.map { it.asJava() },
+    classlikes = classlikes.map { it.asJava() }
+) // TODO: if modifier is from Kotlin, then Empty -> Final I think, Java ones stay the same
+
+internal fun Enum.asJava(): Enum = copy(
+    constructors = constructors.map { it.asJava(name) },
+    functions = (functions + properties.map { it.getter } + properties.map { it.setter }).filterNotNull().map {
+        it.asJava(
+            name
+        )
+    },
+    properties = properties.map { it.asJava() },
+    classlikes = classlikes.map { it.asJava() }
+//    , entries = entries.map { it.asJava() }
+) // TODO: if modifier is from Kotlin, then Empty -> Final I think, Java ones stay the same
+
+internal fun Object.asJava(): Object = copy(
+    functions = (functions + properties.map { it.getter } + properties.map { it.setter })
+        .filterNotNull()
+        .map { it.asJava(name.orEmpty()) },
+    properties = properties.map { it.asJava() } +
+            Property(
+                name = "INSTANCE",
+                modifier = WithAbstraction.Modifier.Final,
+                dri = dri.copy(callable = Callable("INSTANCE", null, emptyList())),
+                documentation = PlatformDependent.empty(),
+                sources = PlatformDependent.empty(),
+                visibility = PlatformDependent.empty(), // TODO: public and static
+                type = JavaTypeWrapper(
+                    dri.packageName?.split(".").orEmpty() +
+                            dri.classNames?.split(".").orEmpty(),
+                    emptyList(),
+                    dri,
+                    false
+                ),
+                setter = null,
+                getter = null,
+                platformData = platformData,
+                receiver = null
+            ),
+    classlikes = classlikes.map { it.asJava() }
+)
+
+internal fun Interface.asJava(): Interface = copy(
+    functions = (functions + properties.map { it.getter } + properties.map { it.setter })
+        .filterNotNull()
+        .map { it.asJava(name) },
+    properties = emptyList(),
+    classlikes = classlikes.map { it.asJava() } // TODO: public static final class DefaultImpls with impls for methods (killme please)
+)
+
+internal fun Annotation.asJava(): Annotation = copy(
+    properties = properties.map { it.asJava() },
+    constructors = emptyList(),
+    classlikes = classlikes.map { it.asJava() }
+) // TODO investigate if annotation class can have methods and properties not from constructor
+
+internal fun Parameter.asJava(): Parameter = copy(
+    type = type.asJava()
+)
+
+internal fun String.getAsPrimitive(): JvmPrimitiveType? = org.jetbrains.kotlin.builtins.PrimitiveType.values()
+    .find { it.typeFqName.asString() == this }
+    ?.let { JvmPrimitiveType.get(it) }
+
+internal fun TypeWrapper.getAsType(classId: ClassId, fqName: String, top: Boolean): TypeWrapper {
+    val fqNameSplit = fqName
+        .takeIf { top }
+        ?.getAsPrimitive()
+        ?.name?.toLowerCase()
+        ?.let(::listOf)
+        ?: classId.asString().split("/")
+
+    return JavaTypeWrapper(
+        fqNameSplit,
+        arguments.map { it.asJava(false) },
+        classId.toDRI(dri),
+        fqNameSplit.last()[0].isLowerCase()
+    )
+}
+
+internal fun TypeWrapper.asJava(top: Boolean = true): TypeWrapper = constructorFqName
+    ?.takeUnless { it.endsWith(".Unit") } // TODO: ???
+    ?.let { fqName -> fqName.mapToJava()?.let { getAsType(it, fqName, top) } } ?: this
+
+
+private fun String.mapToJava(): ClassId? =
+    JavaToKotlinClassMap.mapKotlinToJava(FqName(this).toUnsafe())
+
+internal fun ClassId.toDRI(dri: DRI?): DRI = DRI(
+    packageName = packageFqName.asString(),
+    classNames = classNames(),
+    callable = dri?.callable,//?.asJava(), TODO: ????
+    extra = null,
+    target = null
+)
+
+internal fun ClassId.classNames(): String =
+    shortClassName.identifier + (outerClassId?.classNames()?.let { ".$it" } ?: "")
+
+//fun TypeConstructor.asJava(): TypeReference =
+//    fullyQualifiedName.mapToJava()
+//        ?.let { tc.copy(fullyQualifiedName = it.asString(), params = tc.params.map { it.asJava() }) } ?: tc
+
+//fun TypeParam.asJava(): TypeReference = copy(bounds = bounds.map { it.asJava() })
+
+//fun TypeReference.asJava(): TypeReference = when (this) {
+//    is TypeConstructor -> asJava()
+//    is TypeParam -> asJava()
+//    else -> this
+//}
\ No newline at end of file
diff --git a/plugins/kotlin-as-java/src/main/kotlin/transformers/KotlinAsJavaDocumentableTransformer.kt b/plugins/kotlin-as-java/src/main/kotlin/transformers/KotlinAsJavaDocumentableTransformer.kt
new file mode 100644
index 00000000..8f51e105
--- /dev/null
+++ b/plugins/kotlin-as-java/src/main/kotlin/transformers/KotlinAsJavaDocumentableTransformer.kt
@@ -0,0 +1,11 @@
+package org.jetbrains.dokka.kotlinAsJava.transformers
+
+import org.jetbrains.dokka.kotlinAsJava.converters.asJava
+import org.jetbrains.dokka.model.Module
+import org.jetbrains.dokka.plugability.DokkaContext
+import org.jetbrains.dokka.transformers.documentation.DocumentableTransformer
+
+class KotlinAsJavaDocumentableTransformer : DocumentableTransformer {
+    override fun invoke(original: Module, context: DokkaContext): Module =
+        original.copy(packages = original.packages.map { it.asJava() })
+}