Refactor API of NotFoundClasses

Move deserialization-related stuff to TypeDeserializer, because it's
going to be used in other places besides deserialization

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/lazy/types/JavaTypeResolver.kt

@@ -140,7 +140,7 @@ class JavaTypeResolver(
     // Note that this makes MISSING_DEPENDENCY_CLASS diagnostic messages not as precise as they could be in some corner cases.
     private fun createNotFoundClass(javaType: JavaClassifierType): TypeConstructor {
         val classId = parseCanonicalFqNameIgnoringTypeArguments(javaType.canonicalText)
-        return c.components.deserializedDescriptorResolver.components.notFoundClasses.getClass(classId, listOf(0))
+        return c.components.deserializedDescriptorResolver.components.notFoundClasses.getClass(classId, listOf(0)).typeConstructor
     }
 
     private fun mapKotlinClass(javaType: JavaClassifierType, attr: JavaTypeAttributes, fqName: FqName): ClassDescriptor? {

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/NotFoundClasses.kt

@@ -29,10 +29,12 @@ import org.jetbrains.kotlin.resolve.descriptorUtil.builtIns
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameUnsafe
 import org.jetbrains.kotlin.resolve.descriptorUtil.module
 import org.jetbrains.kotlin.resolve.scopes.MemberScope
-import org.jetbrains.kotlin.serialization.ProtoBuf
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.storage.getValue
-import org.jetbrains.kotlin.types.*
+import org.jetbrains.kotlin.types.ClassTypeConstructorImpl
+import org.jetbrains.kotlin.types.SimpleType
+import org.jetbrains.kotlin.types.TypeSubstitutor
+import org.jetbrains.kotlin.types.Variance
 
 class NotFoundClasses(private val storageManager: StorageManager, private val module: ModuleDescriptor) {
     /**
@@ -71,7 +73,7 @@ class NotFoundClasses(private val storageManager: StorageManager, private val mo
         }
 
         val container = classId.outerClassId?.let { outerClassId ->
-            getOrCreateClass(outerClassId, typeParametersCount.drop(1))
+            getClass(outerClassId, typeParametersCount.drop(1))
         } ?: packageFragments(classId.packageFqName)
 
         // Treat a class with a nested ClassId as inner for simplicity, otherwise the outer type cannot have generic arguments
@@ -152,22 +154,12 @@ class NotFoundClasses(private val storageManager: StorageManager, private val mo
     // (This may happen when a class with the same FQ name is instantiated with different type arguments in different modules.)
     // It's better than creating just one descriptor because otherwise would fail in multiple places where it's asserted that
     // the number of type arguments in a type must be equal to the number of the type parameters of the class
-    private fun getOrCreateClass(classId: ClassId, typeParametersCount: List<Int>): ClassDescriptor {
+    fun getClass(classId: ClassId, typeParametersCount: List<Int>): ClassDescriptor {
         return classes(ClassRequest(classId, typeParametersCount))
     }
 
-    fun getClass(proto: ProtoBuf.Type, nameResolver: NameResolver, typeTable: TypeTable): TypeConstructor {
-        val classId = nameResolver.getClassId(proto.className)
-        return getOrCreateClass(classId, computeTypeParametersCount(classId, proto, typeTable)).typeConstructor
-    }
-
-    fun getClass(classId: ClassId, typeParametersCount: List<Int>): TypeConstructor {
-        return getOrCreateClass(classId, typeParametersCount).typeConstructor
-    }
-
-    fun getTypeAlias(proto: ProtoBuf.Type, nameResolver: NameResolver, typeTable: TypeTable): TypeConstructor {
-        val classId = nameResolver.getClassId(proto.typeAliasName)
-        return typeAliases(ClassRequest(classId, computeTypeParametersCount(classId, proto, typeTable))).typeConstructor
+    fun getTypeAlias(classId: ClassId, typeParametersCount: List<Int>): TypeAliasDescriptor {
+        return typeAliases(ClassRequest(classId, typeParametersCount))
     }
 }
 
@@ -179,12 +171,3 @@ private fun createTypeParameters(
             classifierDescriptor, Annotations.EMPTY, false, Variance.INVARIANT, Name.identifier("T$index"), index
     )
 }
-
-private fun computeTypeParametersCount(classId: ClassId, proto: ProtoBuf.Type, typeTable: TypeTable): List<Int> {
-    val typeParametersCount = generateSequence(proto) { it.outerType(typeTable) }.map { it.argumentCount }.toMutableList()
-    val classNestingLevel = generateSequence(classId, ClassId::getOuterClassId).count()
-    while (typeParametersCount.size < classNestingLevel) {
-        typeParametersCount.add(0)
-    }
-    return typeParametersCount
-}

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/TypeDeserializer.kt

@@ -23,6 +23,7 @@ import org.jetbrains.kotlin.descriptors.ClassifierDescriptor
 import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
 import org.jetbrains.kotlin.descriptors.annotations.AnnotationWithTarget
 import org.jetbrains.kotlin.descriptors.annotations.Annotations
+import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.serialization.Flags
 import org.jetbrains.kotlin.serialization.ProtoBuf
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedAnnotationsWithPossibleTargets
@@ -115,7 +116,9 @@ class TypeDeserializer(
             when {
                 proto.hasClassName() -> {
                     classDescriptors(proto.className)?.typeConstructor
-                    ?: c.components.notFoundClasses.getClass(proto, c.nameResolver, c.typeTable)
+                    ?: c.nameResolver.getClassId(proto.className).let { classId ->
+                        c.components.notFoundClasses.getClass(classId, computeTypeParametersCount(classId, proto, c.typeTable)).typeConstructor
+                    }
                 }
                 proto.hasTypeParameter() ->
                     typeParameterTypeConstructor(proto.typeParameter)
@@ -128,11 +131,22 @@ class TypeDeserializer(
                 }
                 proto.hasTypeAliasName() -> {
                     typeAliasDescriptors(proto.typeAliasName)?.typeConstructor
-                    ?: c.components.notFoundClasses.getTypeAlias(proto, c.nameResolver, c.typeTable)
+                    ?: c.nameResolver.getClassId(proto.typeAliasName).let { classId ->
+                        c.components.notFoundClasses.getTypeAlias(classId, computeTypeParametersCount(classId, proto, c.typeTable)).typeConstructor
+                    }
                 }
                 else -> ErrorUtils.createErrorTypeConstructor("Unknown type")
             }
 
+    private fun computeTypeParametersCount(classId: ClassId, proto: ProtoBuf.Type, typeTable: TypeTable): List<Int> {
+        val typeParametersCount = generateSequence(proto) { it.outerType(typeTable) }.map { it.argumentCount }.toMutableList()
+        val classNestingLevel = generateSequence(classId, ClassId::getOuterClassId).count()
+        while (typeParametersCount.size < classNestingLevel) {
+            typeParametersCount.add(0)
+        }
+        return typeParametersCount
+    }
+
     private fun createSuspendFunctionType(
             annotations: Annotations,
             functionTypeConstructor: TypeConstructor,

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/findClassInModule.kt

@@ -42,7 +42,7 @@ fun ModuleDescriptor.findNonGenericClassAcrossDependencies(classId: ClassId, not
     // Take a list of N zeros, where N is the number of class names in the given ClassId
     val typeParametersCount = generateSequence(classId, ClassId::getOuterClassId).map { 0 }.toList()
 
-    return notFoundClasses.getClass(classId, typeParametersCount).declarationDescriptor as ClassDescriptor
+    return notFoundClasses.getClass(classId, typeParametersCount)
 }
 
 fun ModuleDescriptor.findTypeAliasAcrossModuleDependencies(classId: ClassId): TypeAliasDescriptor? {