org.jetbrains.kotlin.resolve.jvm.checkers.ProtectedInSuperClassCompanionCallChecker.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2015 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.
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package org.jetbrains.kotlin.resolve.jvm.checkers
import com.intellij.psi.PsiElement
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
import org.jetbrains.kotlin.resolve.DescriptorUtils
import org.jetbrains.kotlin.resolve.annotations.hasJvmStaticAnnotation
import org.jetbrains.kotlin.resolve.calls.checkers.CallChecker
import org.jetbrains.kotlin.resolve.calls.checkers.CallCheckerContext
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
import org.jetbrains.kotlin.resolve.descriptorUtil.parentsWithSelf
import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm
class ProtectedInSuperClassCompanionCallChecker : CallChecker {
override fun check(resolvedCall: ResolvedCall<*>, reportOn: PsiElement, context: CallCheckerContext) {
val targetDescriptor = resolvedCall.resultingDescriptor.original
// Protected non-JVM static
if (targetDescriptor.visibility != DescriptorVisibilities.PROTECTED) return
if (targetDescriptor.hasJvmStaticAnnotation()) return
val containerDescriptor = targetDescriptor.containingDeclaration
// Declared in companion object
if (containerDescriptor is ClassDescriptor && containerDescriptor.isCompanionObject) {
val companionDescriptor = containerDescriptor
val companionOwnerDescriptor = companionDescriptor.containingDeclaration as? ClassDescriptor ?: return
val parentClassDescriptors = context.scope.ownerDescriptor.parentsWithSelf.filterIsInstance()
// Called from within a derived class
if (!parentClassDescriptors.any { DescriptorUtils.isSubclass(it, companionOwnerDescriptor) }) return
// Called not within the same companion object or its owner class
if (companionDescriptor !in parentClassDescriptors && companionOwnerDescriptor !in parentClassDescriptors) {
context.trace.report(ErrorsJvm.SUBCLASS_CANT_CALL_COMPANION_PROTECTED_NON_STATIC.on(reportOn))
}
}
}
}