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/*
* Copyright 2010-2016 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.incremental
import org.jetbrains.kotlin.descriptors.Visibilities
import org.jetbrains.kotlin.incremental.ProtoCompareGenerated.ProtoBufClassKind
import org.jetbrains.kotlin.incremental.ProtoCompareGenerated.ProtoBufPackageKind
import org.jetbrains.kotlin.incremental.storage.ProtoMapValue
import org.jetbrains.kotlin.protobuf.MessageLite
import org.jetbrains.kotlin.serialization.Flags
import org.jetbrains.kotlin.serialization.ProtoBuf
import org.jetbrains.kotlin.serialization.deserialization.Deserialization
import org.jetbrains.kotlin.serialization.deserialization.NameResolver
import org.jetbrains.kotlin.serialization.jvm.JvmProtoBufUtil
import java.util.*
data class Difference(
val isClassAffected: Boolean = false,
val areSubclassesAffected: Boolean = false,
val changedMembersNames: Set = emptySet()
)
fun difference(oldData: ProtoMapValue, newData: ProtoMapValue): Difference {
if (!oldData.isPackageFacade && newData.isPackageFacade) return Difference(isClassAffected = true, areSubclassesAffected = true)
if (oldData.isPackageFacade && !newData.isPackageFacade) return Difference(isClassAffected = true)
val differenceObject =
if (oldData.isPackageFacade) {
DifferenceCalculatorForPackageFacade(oldData, newData)
}
else {
DifferenceCalculatorForClass(oldData, newData)
}
return differenceObject.difference()
}
internal val MessageLite.isPrivate: Boolean
get() = Visibilities.isPrivate(Deserialization.visibility(
when (this) {
is ProtoBuf.Constructor -> Flags.VISIBILITY.get(flags)
is ProtoBuf.Function -> Flags.VISIBILITY.get(flags)
is ProtoBuf.Property -> Flags.VISIBILITY.get(flags)
is ProtoBuf.TypeAlias -> Flags.VISIBILITY.get(flags)
else -> error("Unknown message: $this")
}))
private fun MessageLite.name(nameResolver: NameResolver): String {
return when (this) {
is ProtoBuf.Constructor -> ""
is ProtoBuf.Function -> nameResolver.getString(name)
is ProtoBuf.Property -> nameResolver.getString(name)
is ProtoBuf.TypeAlias -> nameResolver.getString(name)
else -> error("Unknown message: $this")
}
}
internal fun List.names(nameResolver: NameResolver): List = map { it.name(nameResolver) }
private abstract class DifferenceCalculator() {
protected abstract val oldNameResolver: NameResolver
protected abstract val newNameResolver: NameResolver
protected val compareObject by lazy { ProtoCompareGenerated(oldNameResolver, newNameResolver) }
abstract fun difference(): Difference
protected fun calcDifferenceForMembers(oldList: List, newList: List): Collection {
val result = hashSetOf()
val oldMap =
oldList.groupBy { it.getHashCode({ compareObject.oldGetIndexOfString(it) }, { compareObject.oldGetIndexOfClassId(it) }) }
val newMap =
newList.groupBy { it.getHashCode({ compareObject.newGetIndexOfString(it) }, { compareObject.newGetIndexOfClassId(it) }) }
val hashes = oldMap.keys + newMap.keys
for (hash in hashes) {
val oldMembers = oldMap[hash]
val newMembers = newMap[hash]
val differentMembers = when {
newMembers == null -> oldMembers!!.names(compareObject.oldNameResolver)
oldMembers == null -> newMembers.names(compareObject.newNameResolver)
else -> calcDifferenceForEqualHashes(oldMembers, newMembers)
}
result.addAll(differentMembers)
}
return result
}
private fun calcDifferenceForEqualHashes(
oldList: List,
newList: List
): Collection {
val result = hashSetOf()
val newSet = HashSet(newList)
oldList.forEach { oldMember ->
val newMember = newSet.firstOrNull { compareObject.checkEquals(oldMember, it) }
if (newMember != null) {
newSet.remove(newMember)
}
else {
result.add(oldMember.name(compareObject.oldNameResolver))
}
}
newSet.forEach { newMember ->
result.add(newMember.name(compareObject.newNameResolver))
}
return result
}
protected fun calcDifferenceForNames(
oldList: List,
newList: List
): Collection {
val oldNames = oldList.map { compareObject.oldNameResolver.getString(it) }.toSet()
val newNames = newList.map { compareObject.newNameResolver.getString(it) }.toSet()
return oldNames.union(newNames) - oldNames.intersect(newNames)
}
private fun MessageLite.getHashCode(stringIndexes: (Int) -> Int, fqNameIndexes: (Int) -> Int): Int {
return when (this) {
is ProtoBuf.Constructor -> hashCode(stringIndexes, fqNameIndexes)
is ProtoBuf.Function -> hashCode(stringIndexes, fqNameIndexes)
is ProtoBuf.Property -> hashCode(stringIndexes, fqNameIndexes)
is ProtoBuf.TypeAlias -> hashCode(stringIndexes, fqNameIndexes)
else -> error("Unknown message: $this")
}
}
private fun ProtoCompareGenerated.checkEquals(old: MessageLite, new: MessageLite): Boolean {
return when {
old is ProtoBuf.Constructor && new is ProtoBuf.Constructor -> checkEquals(old, new)
old is ProtoBuf.Function && new is ProtoBuf.Function -> checkEquals(old, new)
old is ProtoBuf.Property && new is ProtoBuf.Property -> checkEquals(old, new)
old is ProtoBuf.TypeAlias && new is ProtoBuf.TypeAlias -> checkEquals(old, new)
else -> error("Unknown message: $this")
}
}
}
private class DifferenceCalculatorForClass(oldData: ProtoMapValue, newData: ProtoMapValue) : DifferenceCalculator() {
val oldClassData = JvmProtoBufUtil.readClassDataFrom(oldData.bytes, oldData.strings)
val newClassData = JvmProtoBufUtil.readClassDataFrom(newData.bytes, newData.strings)
val oldProto = oldClassData.classProto
val newProto = newClassData.classProto
override val oldNameResolver = oldClassData.nameResolver
override val newNameResolver = newClassData.nameResolver
val diff = compareObject.difference(oldProto, newProto)
override fun difference(): Difference {
var isClassAffected = false
var areSubclassesAffected = false
val names = hashSetOf()
val classIsSealed = newProto.isSealed && oldProto.isSealed
fun Int.oldToNames() = names.add(oldNameResolver.getString(this))
fun Int.newToNames() = names.add(newNameResolver.getString(this))
fun calcDifferenceForNonPrivateMembers(members: (ProtoBuf.Class) -> List): Collection {
val oldMembers = members(oldProto).filterNot { it.isPrivate }
val newMembers = members(newProto).filterNot { it.isPrivate }
return calcDifferenceForMembers(oldMembers, newMembers)
}
for (kind in diff) {
@Suppress("UNUSED_VARIABLE") // To make this 'when' exhaustive
val unused: Any = when (kind!!) {
ProtoBufClassKind.COMPANION_OBJECT_NAME -> {
if (oldProto.hasCompanionObjectName()) oldProto.companionObjectName.oldToNames()
if (newProto.hasCompanionObjectName()) newProto.companionObjectName.newToNames()
isClassAffected = true
}
ProtoBufClassKind.NESTED_CLASS_NAME_LIST -> {
if (classIsSealed) {
// when class is sealed, adding an implementation can break exhaustive when expressions
// the workaround is to recompile all class usages
isClassAffected = true
}
names.addAll(calcDifferenceForNames(oldProto.nestedClassNameList, newProto.nestedClassNameList))
}
ProtoBufClassKind.CONSTRUCTOR_LIST -> {
val differentNonPrivateConstructors = calcDifferenceForNonPrivateMembers(ProtoBuf.Class::getConstructorList)
isClassAffected = isClassAffected || differentNonPrivateConstructors.isNotEmpty()
}
ProtoBufClassKind.FUNCTION_LIST ->
names.addAll(calcDifferenceForNonPrivateMembers(ProtoBuf.Class::getFunctionList))
ProtoBufClassKind.PROPERTY_LIST ->
names.addAll(calcDifferenceForNonPrivateMembers(ProtoBuf.Class::getPropertyList))
ProtoBufClassKind.TYPE_ALIAS_LIST ->
names.addAll(calcDifferenceForNonPrivateMembers(ProtoBuf.Class::getTypeAliasList))
ProtoBufClassKind.ENUM_ENTRY_LIST -> {
isClassAffected = true
}
ProtoBufClassKind.SEALED_SUBCLASS_FQ_NAME_LIST -> {
// TODO
}
ProtoBufClassKind.TYPE_TABLE -> {
// TODO
}
ProtoCompareGenerated.ProtoBufClassKind.SINCE_KOTLIN_INFO,
ProtoCompareGenerated.ProtoBufClassKind.SINCE_KOTLIN_INFO_TABLE -> {
// TODO
}
ProtoBufClassKind.FLAGS,
ProtoBufClassKind.FQ_NAME,
ProtoBufClassKind.TYPE_PARAMETER_LIST,
ProtoBufClassKind.SUPERTYPE_LIST,
ProtoBufClassKind.SUPERTYPE_ID_LIST-> {
isClassAffected = true
areSubclassesAffected = true
}
ProtoBufClassKind.CLASS_MODULE_NAME -> {
// TODO
}
ProtoBufClassKind.CLASS_LOCAL_VARIABLE_LIST -> {
// Not affected, local variables are not accessible outside of a file
}
}
}
return Difference(isClassAffected, areSubclassesAffected, names)
}
}
private class DifferenceCalculatorForPackageFacade(oldData: ProtoMapValue, newData: ProtoMapValue) : DifferenceCalculator() {
val oldPackageData = JvmProtoBufUtil.readPackageDataFrom(oldData.bytes, oldData.strings)
val newPackageData = JvmProtoBufUtil.readPackageDataFrom(newData.bytes, newData.strings)
val oldProto = oldPackageData.packageProto
val newProto = newPackageData.packageProto
override val oldNameResolver = oldPackageData.nameResolver
override val newNameResolver = newPackageData.nameResolver
val diff = compareObject.difference(oldProto, newProto)
override fun difference(): Difference {
val names = hashSetOf()
fun calcDifferenceForNonPrivateMembers(members: (ProtoBuf.Package) -> List): Collection {
val oldMembers = members(oldProto).filterNot { it.isPrivate }
val newMembers = members(newProto).filterNot { it.isPrivate }
return calcDifferenceForMembers(oldMembers, newMembers)
}
for (kind in diff) {
@Suppress("UNUSED_VARIABLE") // To make this 'when' exhaustive
val unused: Any = when (kind!!) {
ProtoBufPackageKind.FUNCTION_LIST ->
names.addAll(calcDifferenceForNonPrivateMembers(ProtoBuf.Package::getFunctionList))
ProtoBufPackageKind.PROPERTY_LIST ->
names.addAll(calcDifferenceForNonPrivateMembers(ProtoBuf.Package::getPropertyList))
ProtoBufPackageKind.TYPE_ALIAS_LIST ->
names.addAll(calcDifferenceForNonPrivateMembers(ProtoBuf.Package::getTypeAliasList))
ProtoBufPackageKind.TYPE_TABLE,
ProtoBufPackageKind.SINCE_KOTLIN_INFO_TABLE,
ProtoBufPackageKind.PACKAGE_MODULE_NAME -> {
// TODO
}
ProtoBufPackageKind.PACKAGE_LOCAL_VARIABLE_LIST -> {
// Not affected, local variables are not accessible outside of a file
}
}
}
return Difference(changedMembersNames = names)
}
}
private val ProtoBuf.Class.isSealed: Boolean
get() = ProtoBuf.Modality.SEALED == Flags.MODALITY.get(flags)
