test-utils/src/main/kotlin/com/google/devtools/ksp/processor/MakeNullableProcessor.kt


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/*
 * Copyright 2020 Google LLC
 * Copyright 2010-2020 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.processor

import com.google.devtools.ksp.processing.Resolver
import com.google.devtools.ksp.symbol.*

open class MakeNullableProcessor : AbstractTestProcessor() {
    val results = mutableListOf<String>()
    val typeCollector = TypeCollector()
    val types = mutableSetOf<KSType>()

    override fun process(resolver: Resolver): List<KSAnnotated> {
        val files = resolver.getNewFiles()
        val ignoredNames = mutableSetOf<String>()

        files.forEach {
            it.accept(typeCollector, types)
        }

        val sortedTypes = types.flatMap { setOf(it, it.makeNullable(), it.makeNotNullable()) }.sortedBy {
            it.toString()
        }

        for (i in sortedTypes) {
            for (j in sortedTypes) {
                results.add("$i ?= $j : ${i.isAssignableFrom(j)}")
            }
        }
        return emptyList()
    }

    override fun toResult(): List<String> {
        return results
    }
}