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Kotlin Full Reflection Library
/*
* Copyright 2010-2016 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.
*/
@file:JvmName("KTypesJvm")
package kotlin.reflect.jvm
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.descriptors.ClassKind.ANNOTATION_CLASS
import org.jetbrains.kotlin.descriptors.ClassKind.INTERFACE
import kotlin.reflect.KClass
import kotlin.reflect.KClassifier
import kotlin.reflect.KType
import kotlin.reflect.KTypeParameter
import kotlin.reflect.jvm.internal.KTypeImpl
import kotlin.reflect.jvm.internal.KotlinReflectionInternalError
/**
* Returns the [KClass] instance representing the runtime class to which this type is erased to on JVM.
*/
@SinceKotlin("1.1")
val KType.jvmErasure: KClass<*>
get() = classifier?.jvmErasure ?: throw KotlinReflectionInternalError("Cannot calculate JVM erasure for type: $this")
internal val KClassifier.jvmErasure: KClass<*>
get() = when (this) {
is KClass<*> -> this
is KTypeParameter -> {
// See getRepresentativeUpperBound in typeSignatureMapping.kt
val bounds = upperBounds
val representativeBound = bounds.firstOrNull {
val classDescriptor = (it as KTypeImpl).type.constructor.declarationDescriptor as? ClassDescriptor
classDescriptor != null && classDescriptor.kind != INTERFACE && classDescriptor.kind != ANNOTATION_CLASS
} ?: bounds.firstOrNull()
representativeBound?.jvmErasure ?: Any::class
}
else -> throw KotlinReflectionInternalError("Cannot calculate JVM erasure for type: $this")
}