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/*
* Copyright 2018 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 kotlinx.serialization.internal
import kotlinx.serialization.*
import kotlin.reflect.KClass
public class EnumDescriptor(override val name: String, private val choices: Array<String>) : SerialClassDescImpl(name) {
override val kind: SerialKind = UnionKind.ENUM_KIND
init {
choices.forEach { addElement(it) }
}
override fun getElementDescriptor(index: Int): SerialDescriptor {
return this
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other == null || this::class != other::class) return false
other as EnumDescriptor
if (name != other.name) return false
if (!choices.contentEquals(other.choices)) return false
return true
}
override fun hashCode(): Int {
var result = super.hashCode()
result = 31 * result + name.hashCode()
result = 31 * result + choices.contentHashCode()
return result
}
}
open class CommonEnumSerializer<T>(val serialName: String, val choices: Array<T>, choicesNames: Array<String>) :
KSerializer<T> {
override val descriptor: EnumDescriptor = EnumDescriptor(serialName, choicesNames)
final override fun serialize(encoder: Encoder, obj: T) {
val index = choices.indexOf(obj)
.also { check(it != -1) { "$obj is not a valid enum $serialName, choices are $choices" } }
encoder.encodeEnum(descriptor, index)
}
final override fun deserialize(decoder: Decoder): T {
val index = decoder.decodeEnum(descriptor)
check(index in choices.indices)
{ "$index is not among valid $serialName choices, choices size is ${choices.size}" }
return choices[index]
}
}
// Binary backwards-compatible with plugin
class EnumSerializer<T : Enum<T>>(serializableClass: KClass<T>) : CommonEnumSerializer<T>(
serializableClass.enumClassName(),
serializableClass.enumMembers(),
serializableClass.enumMembers().map { it.name }.toTypedArray()
)
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