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/*
* Copyright 2022 Google LLC
* Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
*
* 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 com.google.devtools.ksp.impl.symbol.kotlin
import com.google.devtools.ksp.KSObjectCache
import com.google.devtools.ksp.symbol.KSAnnotation
import com.google.devtools.ksp.symbol.KSDeclaration
import com.google.devtools.ksp.symbol.KSType
import com.google.devtools.ksp.symbol.KSTypeArgument
import com.google.devtools.ksp.symbol.Nullability
import org.jetbrains.kotlin.analysis.api.KtStarProjectionTypeArgument
import org.jetbrains.kotlin.analysis.api.components.buildClassType
import org.jetbrains.kotlin.analysis.api.symbols.KtClassOrObjectSymbol
import org.jetbrains.kotlin.analysis.api.symbols.KtTypeAliasSymbol
import org.jetbrains.kotlin.analysis.api.types.KtClassErrorType
import org.jetbrains.kotlin.analysis.api.types.KtFlexibleType
import org.jetbrains.kotlin.analysis.api.types.KtFunctionalType
import org.jetbrains.kotlin.analysis.api.types.KtNonErrorClassType
import org.jetbrains.kotlin.analysis.api.types.KtType
import org.jetbrains.kotlin.analysis.api.types.KtTypeNullability
import org.jetbrains.kotlin.utils.addToStdlib.safeAs
class KSTypeImpl private constructor(internal val type: KtType) : KSType {
companion object : KSObjectCache<KtType, KSTypeImpl>() {
fun getCached(type: KtType): KSTypeImpl = cache.getOrPut(type) { KSTypeImpl(type) }
}
private fun KtType.toDeclaration(): KSDeclaration {
return analyze {
when (this@toDeclaration) {
is KtNonErrorClassType -> {
when (val symbol = this@toDeclaration.classSymbol) {
is KtTypeAliasSymbol -> symbol.expandedType.toDeclaration()
is KtClassOrObjectSymbol -> KSClassDeclarationImpl.getCached(symbol)
}
}
is KtClassErrorType -> KSErrorTypeClassDeclaration
is KtFlexibleType ->
type.lowerBoundIfFlexible().toDeclaration()
else -> KSErrorTypeClassDeclaration
}
}
}
override val declaration: KSDeclaration by lazy {
type.toDeclaration()
}
override val nullability: Nullability by lazy {
if (type.nullability == KtTypeNullability.NON_NULLABLE) {
Nullability.NOT_NULL
} else {
Nullability.NULLABLE
}
}
override val arguments: List<KSTypeArgument> by lazy {
type.safeAs<KtNonErrorClassType>()?.typeArguments?.map { KSTypeArgumentImpl.getCached(it) } ?: emptyList()
}
override val annotations: Sequence<KSAnnotation>
get() = type.annotations()
override fun isAssignableFrom(that: KSType): Boolean {
if (that.isError || this.isError) {
return false
}
return analyze {
that.safeAs<KSTypeImpl>()?.type?.isSubTypeOf(type) == true
}
}
override fun isMutabilityFlexible(): Boolean {
TODO("Not yet implemented")
}
override fun isCovarianceFlexible(): Boolean {
TODO("Not yet implemented")
}
override fun replace(arguments: List<KSTypeArgument>): KSType {
return analyze {
analysisSession.buildClassType((type as KtNonErrorClassType).classSymbol) {
arguments.forEach { arg -> argument(arg.toKtTypeArgument()) }
}.let { getCached(it) }
}
}
override fun starProjection(): KSType {
return analyze {
analysisSession.buildClassType((type as KtNonErrorClassType).classSymbol) {
type.typeArguments.forEach {
argument(KtStarProjectionTypeArgument(type.token))
}
}.let { getCached(it) }
}
}
override fun makeNullable(): KSType {
return analyze {
getCached(type.withNullability(KtTypeNullability.NULLABLE))
}
}
override fun makeNotNullable(): KSType {
return analyze {
getCached(type.withNullability(KtTypeNullability.NON_NULLABLE))
}
}
override val isMarkedNullable: Boolean
get() = type.nullability == KtTypeNullability.NULLABLE
override val isError: Boolean
get() = type is KtClassErrorType
override val isFunctionType: Boolean
get() = type is KtFunctionalType
override val isSuspendFunctionType: Boolean
get() = type is KtFunctionalType && type.isSuspend
override fun toString(): String {
return type.render()
}
}
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