org.jetbrains.kotlin.load.java.BuiltinOverridabilityCondition.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.load.java
import org.jetbrains.kotlin.descriptors.*
import org.jetbrains.kotlin.load.java.BuiltinMethodsWithDifferentJvmName.sameAsRenamedInJvmBuiltin
import org.jetbrains.kotlin.load.java.BuiltinMethodsWithSpecialGenericSignature.sameAsBuiltinMethodWithErasedValueParameters
import org.jetbrains.kotlin.load.java.descriptors.JavaClassDescriptor
import org.jetbrains.kotlin.load.java.descriptors.JavaMethodDescriptor
import org.jetbrains.kotlin.resolve.ExternalOverridabilityCondition
import org.jetbrains.kotlin.resolve.ExternalOverridabilityCondition.Result
import org.jetbrains.kotlin.resolve.OverridingUtil
import org.jetbrains.kotlin.resolve.descriptorUtil.isDocumentedAnnotation
class BuiltinOverridabilityCondition : ExternalOverridabilityCondition {
override fun isOverridable(superDescriptor: CallableDescriptor, subDescriptor: CallableDescriptor, subClassDescriptor: ClassDescriptor?): Result {
if (superDescriptor !is CallableMemberDescriptor || subDescriptor !is FunctionDescriptor || subDescriptor.isFromBuiltins()) {
return Result.UNKNOWN
}
if (!subDescriptor.name.sameAsBuiltinMethodWithErasedValueParameters && !subDescriptor.name.sameAsRenamedInJvmBuiltin) {
return Result.UNKNOWN
}
// This overridability condition checks two things:
// 1. Method accidentally having the same signature as special builtin has does not supposed to be override for it in Java class
// 2. In such Java class (with special signature clash) special builtin is loaded as hidden function with special signature, and
// it should not override non-special method in further inheritance
// See java.nio.Buffer
val overriddenBuiltin = superDescriptor.getOverriddenSpecialBuiltin()
// Checking second condition: special hidden override is not supposed to be an override to non-special irrelevant Java declaration
val isOneOfDescriptorsHidden =
subDescriptor.isHiddenToOvercomeSignatureClash != (superDescriptor as? FunctionDescriptor)?.isHiddenToOvercomeSignatureClash
if ((overriddenBuiltin == null || !subDescriptor.isHiddenToOvercomeSignatureClash) && isOneOfDescriptorsHidden) {
return Result.INCOMPATIBLE
}
// If new containing class is not Java class or subDescriptor signature was artificially changed, use basic overridability rules
if (subClassDescriptor !is JavaClassDescriptor || subDescriptor.initialSignatureDescriptor != null) {
return Result.UNKNOWN
}
// If current Java class has Kotlin super class with override of overriddenBuiltin, then common overridability rules can be applied
// because of final special bridge generated in Kotlin super class
if (subClassDescriptor.hasRealKotlinSuperClassWithOverrideOf(overriddenBuiltin ?: return Result.UNKNOWN)) return Result.UNKNOWN
// Here we know that something in Java with common signature is going to override some special builtin that is supposed to be
// incompatible override
return Result.INCOMPATIBLE
}
override fun getContract() = ExternalOverridabilityCondition.Contract.CONFLICTS_ONLY
}