[FIR] Handle non-kotlin class results from findKotlinClassOrContent

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/FirJavaModuleBasedSession.kt

@@ -59,16 +59,19 @@ class FirLibrarySession private constructor(
 
     init {
         sessionProvider.sessionCache[moduleInfo] = this
+        val javaSymbolProvider = JavaSymbolProvider(this, sessionProvider.project, scope)
         _firSymbolProvider =
             FirCompositeSymbolProvider(
                 listOf(
                     FirLibrarySymbolProviderImpl(this),
                     KotlinDeserializedJvmSymbolsProvider(
                         this, sessionProvider.project,
-                        packagePartProvider, kotlinClassFinder,
+                        packagePartProvider,
+                        javaSymbolProvider,
+                        kotlinClassFinder,
                         javaClassFinder
                     ),
-                    JavaSymbolProvider(this, sessionProvider.project, scope),
+                    javaSymbolProvider,
                     FirDependenciesSymbolProviderImpl(this)
                 )
             )

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/JavaSymbolProvider.kt

@@ -39,6 +39,7 @@ import org.jetbrains.kotlin.load.java.JavaClassFinder
 import org.jetbrains.kotlin.load.java.JvmAnnotationNames
 import org.jetbrains.kotlin.load.java.structure.JavaClass
 import org.jetbrains.kotlin.load.java.structure.JavaTypeParameter
+import org.jetbrains.kotlin.load.kotlin.KotlinClassFinder
 import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
@@ -53,7 +54,10 @@ class JavaSymbolProvider(
 
     private val facade: KotlinJavaPsiFacade get() = KotlinJavaPsiFacade.getInstance(project)
 
-    private fun findClass(classId: ClassId): JavaClass? = facade.findClass(JavaClassFinder.Request(classId), searchScope)
+    private fun findClass(
+        classId: ClassId,
+        content: KotlinClassFinder.Result.ClassFileContent?
+    ): JavaClass? = facade.findClass(JavaClassFinder.Request(classId, previouslyFoundClassFileContent = content?.content), searchScope)
 
     override fun getTopLevelCallableSymbols(packageFqName: FqName, name: Name): List<ConeCallableSymbol> =
         emptyList()
@@ -136,10 +140,12 @@ class JavaSymbolProvider(
             }
     }
 
-    override fun getClassLikeSymbolByFqName(classId: ClassId): ConeClassLikeSymbol? {
+    override fun getClassLikeSymbolByFqName(classId: ClassId): ConeClassLikeSymbol? = getFirJavaClass(classId)
+
+    fun getFirJavaClass(classId: ClassId, content: KotlinClassFinder.Result.ClassFileContent? = null): ConeClassLikeSymbol? {
         if (!hasTopLevelClassOf(classId)) return null
         return classCache.lookupCacheOrCalculateWithPostCompute(classId, {
-            val foundClass = findClass(classId)
+            val foundClass = findClass(classId, content)
             if (foundClass == null || foundClass.annotations.any { it.classId?.asSingleFqName() == JvmAnnotationNames.METADATA_FQ_NAME }) {
                 null to null
             } else {

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/deserialization/KotlinDeserializedJvmSymbolsProvider.kt

@@ -21,6 +21,7 @@ import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
 import org.jetbrains.kotlin.fir.expressions.FirClassReferenceExpression
 import org.jetbrains.kotlin.fir.expressions.FirExpression
 import org.jetbrains.kotlin.fir.expressions.impl.*
+import org.jetbrains.kotlin.fir.java.JavaSymbolProvider
 import org.jetbrains.kotlin.fir.java.createConstant
 import org.jetbrains.kotlin.fir.java.topLevelName
 import org.jetbrains.kotlin.fir.references.FirErrorNamedReference
@@ -61,6 +62,7 @@ class KotlinDeserializedJvmSymbolsProvider(
     val session: FirSession,
     val project: Project,
     private val packagePartProvider: PackagePartProvider,
+    private val javaSymbolProvider: JavaSymbolProvider,
     private val kotlinClassFinder: KotlinClassFinder,
     private val javaClassFinder: JavaClassFinder
 ) : AbstractFirSymbolProvider() {
@@ -68,6 +70,8 @@ class KotlinDeserializedJvmSymbolsProvider(
     private val typeAliasCache = HashMap<ClassId, FirTypeAliasSymbol?>()
     private val packagePartsCache = HashMap<FqName, Collection<PackagePartsCacheData>>()
 
+    private val handledByJava = HashSet<ClassId>()
+
     private class PackagePartsCacheData(
         val proto: ProtoBuf.Package,
         val context: FirDeserializationContext,
@@ -313,10 +317,17 @@ class KotlinDeserializedJvmSymbolsProvider(
         if (!hasTopLevelClassOf(classId)) return null
         if (classesCache.containsKey(classId)) return classesCache[classId]
 
+        if (classId in handledByJava) return null
 
-//        return classesCache.getOrPut(classId) {
+        val result = kotlinClassFinder.findKotlinClassOrContent(classId)
-        //return null
+        val kotlinJvmBinaryClass = when (result) {
-        val kotlinJvmBinaryClass = kotlinClassFinder.findKotlinClass(classId)
+            is KotlinClassFinder.Result.KotlinClass -> result.kotlinJvmBinaryClass
+            is KotlinClassFinder.Result.ClassFileContent -> {
+                handledByJava.add(classId)
+                return javaSymbolProvider.getFirJavaClass(classId, result) as FirClassSymbol?
+            }
+            null -> null
+        }
         if (kotlinJvmBinaryClass == null) {
             val outerClassId = classId.outerClassId ?: return null
             val outerJvmBinaryClass = kotlinClassFinder.findKotlinClass(outerClassId) ?: return null