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Kotlin Full Reflection Library
/*
* Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package kotlin.reflect.jvm.internal.impl.serialization.deserialization
import kotlin.reflect.jvm.internal.impl.descriptors.*
import kotlin.reflect.jvm.internal.impl.descriptors.annotations.Annotations
import kotlin.reflect.jvm.internal.impl.descriptors.impl.FieldDescriptorImpl
import kotlin.reflect.jvm.internal.impl.descriptors.impl.PropertyGetterDescriptorImpl
import kotlin.reflect.jvm.internal.impl.descriptors.impl.PropertySetterDescriptorImpl
import kotlin.reflect.jvm.internal.impl.descriptors.impl.ValueParameterDescriptorImpl
import kotlin.reflect.jvm.internal.impl.metadata.ProtoBuf
import kotlin.reflect.jvm.internal.impl.metadata.deserialization.*
import kotlin.reflect.jvm.internal.impl.protobuf.MessageLite
import kotlin.reflect.jvm.internal.impl.resolve.DescriptorFactory
import kotlin.reflect.jvm.internal.impl.resolve.descriptorUtil.fqNameSafe
import kotlin.reflect.jvm.internal.impl.serialization.deserialization.descriptors.*
import kotlin.reflect.jvm.internal.impl.types.KotlinType
class MemberDeserializer(private val c: DeserializationContext) {
private val annotationDeserializer = AnnotationDeserializer(c.components.moduleDescriptor, c.components.notFoundClasses)
fun loadProperty(proto: ProtoBuf.Property): PropertyDescriptor {
val flags = if (proto.hasFlags()) proto.flags else loadOldFlags(proto.oldFlags)
val property = DeserializedPropertyDescriptor(
c.containingDeclaration, null,
getAnnotations(proto, flags, AnnotatedCallableKind.PROPERTY),
ProtoEnumFlags.modality(Flags.MODALITY.get(flags)),
ProtoEnumFlags.descriptorVisibility(Flags.VISIBILITY.get(flags)),
Flags.IS_VAR.get(flags),
c.nameResolver.getName(proto.name),
ProtoEnumFlags.memberKind(Flags.MEMBER_KIND.get(flags)),
Flags.IS_LATEINIT.get(flags),
Flags.IS_CONST.get(flags),
Flags.IS_EXTERNAL_PROPERTY.get(flags),
Flags.IS_DELEGATED.get(flags),
Flags.IS_EXPECT_PROPERTY.get(flags),
proto,
c.nameResolver,
c.typeTable,
c.versionRequirementTable,
c.containerSource
)
val local = c.childContext(property, proto.typeParameterList)
val hasGetter = Flags.HAS_GETTER.get(flags)
val receiverAnnotations = if (hasGetter && proto.hasReceiver())
getReceiverParameterAnnotations(proto, AnnotatedCallableKind.PROPERTY_GETTER)
else
Annotations.EMPTY
property.setType(
local.typeDeserializer.type(proto.returnType(c.typeTable)),
local.typeDeserializer.ownTypeParameters,
getDispatchReceiverParameter(),
proto.receiverType(c.typeTable)?.let(local.typeDeserializer::type)?.let { receiverType ->
DescriptorFactory.createExtensionReceiverParameterForCallable(property, receiverType, receiverAnnotations)
},
proto.contextReceiverTypes(c.typeTable).mapIndexed { index, type -> type.toContextReceiver(local, property, index) }
)
// Per documentation on Property.getter_flags in metadata.proto, if an accessor flags field is absent, its value should be computed
// by taking hasAnnotations/visibility/modality from property flags, and using false for the rest
val defaultAccessorFlags = Flags.getAccessorFlags(
Flags.HAS_ANNOTATIONS.get(flags),
Flags.VISIBILITY.get(flags),
Flags.MODALITY.get(flags),
false, false, false
)
val getter = if (hasGetter) {
val getterFlags = if (proto.hasGetterFlags()) proto.getterFlags else defaultAccessorFlags
val isNotDefault = Flags.IS_NOT_DEFAULT.get(getterFlags)
val isExternal = Flags.IS_EXTERNAL_ACCESSOR.get(getterFlags)
val isInline = Flags.IS_INLINE_ACCESSOR.get(getterFlags)
val annotations = getAnnotations(proto, getterFlags, AnnotatedCallableKind.PROPERTY_GETTER)
val getter = if (isNotDefault) {
PropertyGetterDescriptorImpl(
property,
annotations,
ProtoEnumFlags.modality(Flags.MODALITY.get(getterFlags)),
ProtoEnumFlags.descriptorVisibility(Flags.VISIBILITY.get(getterFlags)),
/* isDefault = */ !isNotDefault,
/* isExternal = */ isExternal,
isInline,
property.kind, null, SourceElement.NO_SOURCE
)
} else {
DescriptorFactory.createDefaultGetter(property, annotations)
}
getter.initialize(property.returnType)
getter
} else {
null
}
val setter = if (Flags.HAS_SETTER.get(flags)) {
val setterFlags = if (proto.hasSetterFlags()) proto.setterFlags else defaultAccessorFlags
val isNotDefault = Flags.IS_NOT_DEFAULT.get(setterFlags)
val isExternal = Flags.IS_EXTERNAL_ACCESSOR.get(setterFlags)
val isInline = Flags.IS_INLINE_ACCESSOR.get(setterFlags)
val annotations = getAnnotations(proto, setterFlags, AnnotatedCallableKind.PROPERTY_SETTER)
if (isNotDefault) {
val setter = PropertySetterDescriptorImpl(
property,
annotations,
ProtoEnumFlags.modality(Flags.MODALITY.get(setterFlags)),
ProtoEnumFlags.descriptorVisibility(Flags.VISIBILITY.get(setterFlags)),
/* isDefault = */ !isNotDefault,
/* isExternal = */ isExternal,
isInline,
property.kind, null, SourceElement.NO_SOURCE
)
val setterLocal = local.childContext(setter, listOf())
val valueParameters = setterLocal.memberDeserializer.valueParameters(
listOf(proto.setterValueParameter), proto, AnnotatedCallableKind.PROPERTY_SETTER
)
setter.initialize(valueParameters.single())
setter
} else {
DescriptorFactory.createDefaultSetter(
property, annotations,
Annotations.EMPTY /* Otherwise the setter is not default, see DescriptorResolver.resolvePropertySetterDescriptor */
)
}
} else {
null
}
if (Flags.HAS_CONSTANT.get(flags)) {
property.setCompileTimeInitializerFactory {
c.storageManager.createNullableLazyValue {
val container = c.containingDeclaration.asProtoContainer()!!
c.components.annotationAndConstantLoader.loadPropertyConstant(container, proto, property.returnType)
}
}
}
if ((c.containingDeclaration as? ClassDescriptor)?.kind == ClassKind.ANNOTATION_CLASS) {
property.setCompileTimeInitializerFactory {
c.storageManager.createNullableLazyValue {
val container = c.containingDeclaration.asProtoContainer()!!
c.components.annotationAndConstantLoader.loadAnnotationDefaultValue(container, proto, property.returnType)
}
}
}
property.initialize(
getter, setter,
FieldDescriptorImpl(getPropertyFieldAnnotations(proto, isDelegate = false), property),
FieldDescriptorImpl(getPropertyFieldAnnotations(proto, isDelegate = true), property)
)
return property
}
private fun DeserializedSimpleFunctionDescriptor.initializeWithCoroutinesExperimentalityStatus(
extensionReceiverParameter: ReceiverParameterDescriptor?,
dispatchReceiverParameter: ReceiverParameterDescriptor?,
contextReceiverParameters: List,
typeParameters: List,
unsubstitutedValueParameters: List,
unsubstitutedReturnType: KotlinType?,
modality: Modality?,
visibility: DescriptorVisibility,
userDataMap: Map, *>
) {
initialize(
extensionReceiverParameter,
dispatchReceiverParameter,
contextReceiverParameters,
typeParameters,
unsubstitutedValueParameters,
unsubstitutedReturnType,
modality,
visibility,
userDataMap
)
}
private fun loadOldFlags(oldFlags: Int): Int {
val lowSixBits = oldFlags and 0x3f
val rest = (oldFlags shr 8) shl 6
return lowSixBits + rest
}
fun loadFunction(proto: ProtoBuf.Function): SimpleFunctionDescriptor {
val flags = if (proto.hasFlags()) proto.flags else loadOldFlags(proto.oldFlags)
val annotations = getAnnotations(proto, flags, AnnotatedCallableKind.FUNCTION)
val receiverAnnotations = if (proto.hasReceiver())
getReceiverParameterAnnotations(proto, AnnotatedCallableKind.FUNCTION)
else Annotations.EMPTY
val versionRequirementTable =
if (c.containingDeclaration.fqNameSafe.child(c.nameResolver.getName(proto.name)) == KOTLIN_SUSPEND_BUILT_IN_FUNCTION_FQ_NAME)
VersionRequirementTable.EMPTY
else
c.versionRequirementTable
val function = DeserializedSimpleFunctionDescriptor(
c.containingDeclaration, /* original = */ null, annotations, c.nameResolver.getName(proto.name),
ProtoEnumFlags.memberKind(Flags.MEMBER_KIND.get(flags)), proto, c.nameResolver, c.typeTable, versionRequirementTable,
c.containerSource
)
val local = c.childContext(function, proto.typeParameterList)
function.initializeWithCoroutinesExperimentalityStatus(
proto.receiverType(c.typeTable)?.let(local.typeDeserializer::type)?.let { receiverType ->
DescriptorFactory.createExtensionReceiverParameterForCallable(function, receiverType, receiverAnnotations)
},
getDispatchReceiverParameter(),
proto.contextReceiverTypes(c.typeTable).mapIndexedNotNull { index, type -> type.toContextReceiver(local, function, index) },
local.typeDeserializer.ownTypeParameters,
local.memberDeserializer.valueParameters(proto.valueParameterList, proto, AnnotatedCallableKind.FUNCTION),
local.typeDeserializer.type(proto.returnType(c.typeTable)),
ProtoEnumFlags.modality(Flags.MODALITY.get(flags)),
ProtoEnumFlags.descriptorVisibility(Flags.VISIBILITY.get(flags)),
emptyMap, Any?>()
)
function.isOperator = Flags.IS_OPERATOR.get(flags)
function.isInfix = Flags.IS_INFIX.get(flags)
function.isExternal = Flags.IS_EXTERNAL_FUNCTION.get(flags)
function.isInline = Flags.IS_INLINE.get(flags)
function.isTailrec = Flags.IS_TAILREC.get(flags)
function.isSuspend = Flags.IS_SUSPEND.get(flags)
function.isExpect = Flags.IS_EXPECT_FUNCTION.get(flags)
function.setHasStableParameterNames(!Flags.IS_FUNCTION_WITH_NON_STABLE_PARAMETER_NAMES.get(flags))
val mapValueForContract =
c.components.contractDeserializer.deserializeContractFromFunction(proto, function, c.typeTable, local.typeDeserializer)
if (mapValueForContract != null) {
function.putInUserDataMap(mapValueForContract.first, mapValueForContract.second)
}
return function
}
fun loadTypeAlias(proto: ProtoBuf.TypeAlias): TypeAliasDescriptor {
val annotations = Annotations.create(
proto.annotationList.map { annotationDeserializer.deserializeAnnotation(it, c.nameResolver) }
)
val visibility = ProtoEnumFlags.descriptorVisibility(Flags.VISIBILITY.get(proto.flags))
val typeAlias = DeserializedTypeAliasDescriptor(
c.storageManager, c.containingDeclaration, annotations, c.nameResolver.getName(proto.name),
visibility, proto, c.nameResolver, c.typeTable, c.versionRequirementTable, c.containerSource
)
val local = c.childContext(typeAlias, proto.typeParameterList)
typeAlias.initialize(
local.typeDeserializer.ownTypeParameters,
local.typeDeserializer.simpleType(proto.underlyingType(c.typeTable), expandTypeAliases = false),
local.typeDeserializer.simpleType(proto.expandedType(c.typeTable), expandTypeAliases = false)
)
return typeAlias
}
private fun getDispatchReceiverParameter(): ReceiverParameterDescriptor? {
return (c.containingDeclaration as? ClassDescriptor)?.thisAsReceiverParameter
}
fun loadConstructor(proto: ProtoBuf.Constructor, isPrimary: Boolean): ClassConstructorDescriptor {
val classDescriptor = c.containingDeclaration as ClassDescriptor
val descriptor = DeserializedClassConstructorDescriptor(
classDescriptor, null, getAnnotations(proto, proto.flags, AnnotatedCallableKind.FUNCTION),
isPrimary, CallableMemberDescriptor.Kind.DECLARATION, proto, c.nameResolver, c.typeTable, c.versionRequirementTable,
c.containerSource
)
val local = c.childContext(descriptor, listOf())
descriptor.initialize(
local.memberDeserializer.valueParameters(proto.valueParameterList, proto, AnnotatedCallableKind.FUNCTION),
ProtoEnumFlags.descriptorVisibility(Flags.VISIBILITY.get(proto.flags))
)
descriptor.returnType = classDescriptor.defaultType
descriptor.isExpect = classDescriptor.isExpect
descriptor.setHasStableParameterNames(!Flags.IS_CONSTRUCTOR_WITH_NON_STABLE_PARAMETER_NAMES.get(proto.flags))
return descriptor
}
private fun getAnnotations(proto: MessageLite, flags: Int, kind: AnnotatedCallableKind): Annotations {
if (!Flags.HAS_ANNOTATIONS.get(flags)) {
return Annotations.EMPTY
}
return NonEmptyDeserializedAnnotations(c.storageManager) {
c.containingDeclaration.asProtoContainer()?.let {
c.components.annotationAndConstantLoader.loadCallableAnnotations(it, proto, kind).toList()
}.orEmpty()
}
}
private fun getPropertyFieldAnnotations(proto: ProtoBuf.Property, isDelegate: Boolean): Annotations {
if (!Flags.HAS_ANNOTATIONS.get(proto.flags)) {
return Annotations.EMPTY
}
return NonEmptyDeserializedAnnotations(c.storageManager) {
c.containingDeclaration.asProtoContainer()?.let {
if (isDelegate) {
c.components.annotationAndConstantLoader.loadPropertyDelegateFieldAnnotations(it, proto).toList()
} else {
c.components.annotationAndConstantLoader.loadPropertyBackingFieldAnnotations(it, proto).toList()
}
}.orEmpty()
}
}
private fun getReceiverParameterAnnotations(proto: MessageLite, kind: AnnotatedCallableKind): Annotations =
DeserializedAnnotations(c.storageManager) {
c.containingDeclaration.asProtoContainer()?.let {
c.components.annotationAndConstantLoader.loadExtensionReceiverParameterAnnotations(it, proto, kind)
}.orEmpty()
}
private fun valueParameters(
valueParameters: List,
callable: MessageLite,
kind: AnnotatedCallableKind
): List {
val callableDescriptor = c.containingDeclaration as CallableDescriptor
val containerOfCallable = callableDescriptor.containingDeclaration.asProtoContainer()
return valueParameters.mapIndexed { i, proto ->
val flags = if (proto.hasFlags()) proto.flags else 0
val annotations = if (containerOfCallable != null && Flags.HAS_ANNOTATIONS.get(flags)) {
NonEmptyDeserializedAnnotations(c.storageManager) {
c.components.annotationAndConstantLoader
.loadValueParameterAnnotations(containerOfCallable, callable, kind, i, proto)
.toList()
}
} else Annotations.EMPTY
ValueParameterDescriptorImpl(
callableDescriptor, null, i,
annotations,
c.nameResolver.getName(proto.name),
c.typeDeserializer.type(proto.type(c.typeTable)),
Flags.DECLARES_DEFAULT_VALUE.get(flags),
Flags.IS_CROSSINLINE.get(flags),
Flags.IS_NOINLINE.get(flags),
proto.varargElementType(c.typeTable)?.let { c.typeDeserializer.type(it) },
SourceElement.NO_SOURCE
)
}.toList()
}
private fun DeclarationDescriptor.asProtoContainer(): ProtoContainer? = when (this) {
is PackageFragmentDescriptor -> ProtoContainer.Package(fqName, c.nameResolver, c.typeTable, c.containerSource)
is DeserializedClassDescriptor -> thisAsProtoContainer
else -> null // TODO: support annotations on lambdas and their parameters
}
private fun ProtoBuf.Type.toContextReceiver(
deserializationContext: DeserializationContext,
callableDescriptor: CallableDescriptor,
index: Int
): ReceiverParameterDescriptor? {
val contextReceiverType = deserializationContext.typeDeserializer.type(this)
return DescriptorFactory.createContextReceiverParameterForCallable(
callableDescriptor,
contextReceiverType,
/* customLabelName = */ null/*todo store custom label name in metadata?*/,
Annotations.EMPTY,
index
)
}
}