org.jetbrains.kotlin.resolve.jvm.JvmDeclarationReturnTypeSanitizer.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2017 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.resolve.jvm

import org.jetbrains.kotlin.config.LanguageFeature
import org.jetbrains.kotlin.config.LanguageVersionSettings
import org.jetbrains.kotlin.descriptors.annotations.FilteredAnnotations
import org.jetbrains.kotlin.load.java.JvmAnnotationNames
import org.jetbrains.kotlin.resolve.BindingTrace
import org.jetbrains.kotlin.resolve.DeclarationReturnTypeSanitizer
import org.jetbrains.kotlin.types.UnwrappedType
import org.jetbrains.kotlin.types.WrappedTypeFactory
import org.jetbrains.kotlin.types.replaceAnnotations

object JvmDeclarationReturnTypeSanitizer : DeclarationReturnTypeSanitizer {
    override fun sanitizeReturnType(
        inferred: UnwrappedType,
        wrappedTypeFactory: WrappedTypeFactory,
        trace: BindingTrace,
        languageVersionSettings: LanguageVersionSettings
    ): UnwrappedType =
        if (languageVersionSettings.supportsFeature(LanguageFeature.StrictJavaNullabilityAssertions)) {
            // NB can't check for presence of EnhancedNullability here,
            // because it will also cause recursion in declaration type resolution.
            inferred.replaceAttributes(
                inferred.attributes.replaceAnnotations(
                    FilteredAnnotations(inferred.annotations, languageVersionSettings.supportsFeature(LanguageFeature.NewInference)) {
                        it != JvmAnnotationNames.ENHANCED_NULLABILITY_ANNOTATION
                    }
                )
            )
        } else inferred
}