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/*
* Copyright 2017-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.serialization.protobuf.internal
import kotlinx.serialization.*
import kotlinx.serialization.descriptors.*
import kotlinx.serialization.encoding.*
@OptIn(ExperimentalSerializationApi::class)
internal abstract class ProtobufTaggedEncoder : ProtobufTaggedBase(), Encoder, CompositeEncoder {
private enum class NullableMode {
ACCEPTABLE,
OPTIONAL,
COLLECTION,
NOT_NULL
}
private var nullableMode: NullableMode = NullableMode.NOT_NULL
protected abstract fun SerialDescriptor.getTag(index: Int): ProtoDesc
protected abstract fun encodeTaggedInt(tag: ProtoDesc, value: Int)
protected abstract fun encodeTaggedByte(tag: ProtoDesc, value: Byte)
protected abstract fun encodeTaggedShort(tag: ProtoDesc, value: Short)
protected abstract fun encodeTaggedLong(tag: ProtoDesc, value: Long)
protected abstract fun encodeTaggedFloat(tag: ProtoDesc, value: Float)
protected abstract fun encodeTaggedDouble(tag: ProtoDesc, value: Double)
protected abstract fun encodeTaggedBoolean(tag: ProtoDesc, value: Boolean)
protected abstract fun encodeTaggedChar(tag: ProtoDesc, value: Char)
protected abstract fun encodeTaggedString(tag: ProtoDesc, value: String)
protected abstract fun encodeTaggedEnum(tag: ProtoDesc, enumDescriptor: SerialDescriptor, ordinal: Int)
protected open fun encodeTaggedInline(tag: ProtoDesc, inlineDescriptor: SerialDescriptor): Encoder = this.apply { pushTag(tag) }
public final override fun encodeNull() {
if (nullableMode != NullableMode.ACCEPTABLE) {
val message = when (nullableMode) {
NullableMode.OPTIONAL -> "'null' is not supported for optional properties in ProtoBuf"
NullableMode.COLLECTION -> "'null' is not supported for collection types in ProtoBuf"
NullableMode.NOT_NULL -> "'null' is not allowed for not-null properties"
else -> "'null' is not supported in ProtoBuf";
}
throw SerializationException(message)
}
}
public final override fun encodeBoolean(value: Boolean) {
encodeTaggedBoolean(popTagOrDefault(), value)
}
public final override fun encodeByte(value: Byte) {
encodeTaggedByte(popTagOrDefault(), value)
}
public final override fun encodeShort(value: Short) {
encodeTaggedShort(popTagOrDefault(), value)
}
public final override fun encodeInt(value: Int) {
encodeTaggedInt(popTagOrDefault(), value)
}
public final override fun encodeLong(value: Long) {
encodeTaggedLong(popTagOrDefault(), value)
}
public final override fun encodeFloat(value: Float) {
encodeTaggedFloat(popTagOrDefault(), value)
}
public final override fun encodeDouble(value: Double) {
encodeTaggedDouble(popTagOrDefault(), value)
}
public final override fun encodeChar(value: Char) {
encodeTaggedChar(popTagOrDefault(), value)
}
public final override fun encodeString(value: String) {
encodeTaggedString(popTagOrDefault(), value)
}
public final override fun encodeEnum(
enumDescriptor: SerialDescriptor,
index: Int
): Unit = encodeTaggedEnum(popTagOrDefault(), enumDescriptor, index)
public final override fun endStructure(descriptor: SerialDescriptor) {
if (stackSize >= 0) {
popTag()
}
endEncode(descriptor)
}
protected open fun endEncode(descriptor: SerialDescriptor) {}
public final override fun encodeBooleanElement(descriptor: SerialDescriptor, index: Int, value: Boolean): Unit =
encodeTaggedBoolean(descriptor.getTag(index), value)
public final override fun encodeByteElement(descriptor: SerialDescriptor, index: Int, value: Byte): Unit =
encodeTaggedByte(descriptor.getTag(index), value)
public final override fun encodeShortElement(descriptor: SerialDescriptor, index: Int, value: Short): Unit =
encodeTaggedShort(descriptor.getTag(index), value)
public final override fun encodeIntElement(descriptor: SerialDescriptor, index: Int, value: Int): Unit =
encodeTaggedInt(descriptor.getTag(index), value)
public final override fun encodeLongElement(descriptor: SerialDescriptor, index: Int, value: Long): Unit =
encodeTaggedLong(descriptor.getTag(index), value)
public final override fun encodeFloatElement(descriptor: SerialDescriptor, index: Int, value: Float): Unit =
encodeTaggedFloat(descriptor.getTag(index), value)
public final override fun encodeDoubleElement(descriptor: SerialDescriptor, index: Int, value: Double): Unit =
encodeTaggedDouble(descriptor.getTag(index), value)
public final override fun encodeCharElement(descriptor: SerialDescriptor, index: Int, value: Char): Unit =
encodeTaggedChar(descriptor.getTag(index), value)
public final override fun encodeStringElement(descriptor: SerialDescriptor, index: Int, value: String): Unit =
encodeTaggedString(descriptor.getTag(index), value)
public final override fun <T : Any?> encodeSerializableElement(
descriptor: SerialDescriptor,
index: Int,
serializer: SerializationStrategy<T>,
value: T
) {
nullableMode = NullableMode.NOT_NULL
pushTag(descriptor.getTag(index))
encodeSerializableValue(serializer, value)
}
public final override fun <T : Any> encodeNullableSerializableElement(
descriptor: SerialDescriptor,
index: Int,
serializer: SerializationStrategy<T>,
value: T?
) {
val elementKind = descriptor.getElementDescriptor(index).kind
nullableMode = if (descriptor.isElementOptional(index)) {
NullableMode.OPTIONAL
} else if (elementKind == StructureKind.MAP || elementKind == StructureKind.LIST) {
NullableMode.COLLECTION
} else {
NullableMode.ACCEPTABLE
}
pushTag(descriptor.getTag(index))
encodeNullableSerializableValue(serializer, value)
}
override fun encodeInline(inlineDescriptor: SerialDescriptor): Encoder {
return encodeTaggedInline(popTag(), inlineDescriptor)
}
override fun encodeInlineElement(descriptor: SerialDescriptor, index: Int): Encoder {
return encodeTaggedInline(descriptor.getTag(index), descriptor.getElementDescriptor(index))
}
}
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