org.jetbrains.kotlin.serialization.deserialization.MetadataUtil.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2023 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 org.jetbrains.kotlin.serialization.deserialization
import org.jetbrains.kotlin.descriptors.SourceElement
import org.jetbrains.kotlin.metadata.ProtoBuf
import org.jetbrains.kotlin.metadata.builtins.BuiltInsBinaryVersion
import org.jetbrains.kotlin.metadata.deserialization.NameResolverImpl
import org.jetbrains.kotlin.name.ClassId
import org.jetbrains.kotlin.serialization.deserialization.builtins.BuiltInSerializerProtocol
import java.io.InputStream
class MetadataClassDataFinder(val finder: KotlinMetadataFinder) : ClassDataFinder {
override fun findClassData(classId: ClassId): ClassData? {
val topLevelClassId = generateSequence(classId, ClassId::getOuterClassId).last()
val stream = finder.findMetadata(topLevelClassId) ?: return null
val (message, nameResolver, version) = readProto(stream)
return message.class_List.firstOrNull { classProto ->
nameResolver.getClassId(classProto.fqName) == classId
}?.let { classProto ->
ClassData(nameResolver, classProto, version, SourceElement.NO_SOURCE)
}
}
}
fun readProto(stream: InputStream): Triple {
val version = BuiltInsBinaryVersion.readFrom(stream)
if (!version.isCompatibleWithCurrentCompilerVersion()) {
// TODO: report a proper diagnostic
throw UnsupportedOperationException(
"Kotlin metadata definition format version is not supported: " +
"expected ${BuiltInsBinaryVersion.INSTANCE}, actual $version. " +
"Please update Kotlin"
)
}
val message = ProtoBuf.PackageFragment.parseFrom(stream, BuiltInSerializerProtocol.extensionRegistry)
val nameResolver = NameResolverImpl(message.strings, message.qualifiedNames)
return Triple(message, nameResolver, version)
}