TypeParser.kt
/*
* Copyright 2022 The Android Open Source Project
*
* 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 androidx.privacysandbox.tools.apicompiler.parser
import androidx.privacysandbox.tools.core.model.Type
import com.google.devtools.ksp.processing.KSPLogger
import com.google.devtools.ksp.symbol.KSDeclaration
import com.google.devtools.ksp.symbol.KSTypeReference
import com.google.devtools.ksp.symbol.Nullability
import com.google.devtools.ksp.symbol.Variance
internal class TypeParser(private val logger: KSPLogger) {
fun parseFromDeclaration(declaration: KSDeclaration): Type {
return Type(
packageName = declaration.packageName.getFullName(),
simpleName = declaration.simpleName.getShortName(),
)
}
fun parseFromTypeReference(typeReference: KSTypeReference, debugName: String): Type {
val resolvedType = typeReference.resolve()
if (resolvedType.isError) {
logger.error("Failed to resolve type for $debugName.")
}
if (resolvedType.nullability == Nullability.NULLABLE) {
logger.error("Error in $debugName: nullable types are not supported.")
}
val typeArguments = typeReference.element?.typeArguments?.mapNotNull {
if (it.type == null) {
logger.error("Error in $debugName: null type argument.")
}
if (it.variance != Variance.INVARIANT) {
logger.error("Error in $debugName: only invariant type arguments are supported.")
}
it.type
} ?: emptyList()
return Type(
packageName = resolvedType.declaration.packageName.getFullName(),
simpleName = resolvedType.declaration.simpleName.getShortName(),
typeParameters = typeArguments.map { parseFromTypeReference(it, debugName) },
)
}
}