[v0.90.3] List<@Polymorphic Any> doesn't support defaultDeserializer #256
Description
Hello,
I'm having trouble to have a fallback on a List<@polymorphic Any> with optional children (non handled atm).
Given this example XML:
<Extensions>
<Extension source="mySource">
<![CDATA[{"savedData":""}]]>
</Extension>
<Extension type="AdVerifications">
<AdVerifications>
<Verification vendor="Something">
<JavaScriptResource apiFramework="omid" browserOptional="true">
<![CDATA[https://google.com/video.js]]>
</JavaScriptResource>
<VerificationParameters>
<![CDATA[{"key":"21649"}]]>
</VerificationParameters>
</Verification>
</AdVerifications>
</Extension>
<Extension type="geo">
<Country>IE</Country>
<Bandwidth>4</Bandwidth>
</Extension>
</Extensions>I'm trying to solve it like this:
@Serializable
@SerialName("Extension")
data class ExtensionDto(
val source: String? = null,
val type: String? = null,
@XmlValue
var value: List<@Polymorphic Any> = listOf()
) {
companion object {
fun module() = SerializersModule {
polymorphic(Any::class) {
defaultDeserializer { Unknown.serializer() }
subclass(String::class)
subclass(AdVerificationsDto::class)
}
}
}
}
@Serializable
class UnknownI also tried using:
fun module() = SerializersModule {
polymorphicDefaultDeserializer(Any::class) { UnknownType.serializer() }
polymorphic(Any::class) {
subclass(AdVerificationsDto::class)
subclass(String::class)
}
}And the parser setup:
object XmlParser {
@OptIn(ExperimentalXmlUtilApi::class)
val parser = XML(ExtensionDto.module()) {
policy = DefaultXmlSerializationPolicy(formatCache = defaultSharedFormatCache()) {
autoPolymorphic = true
unknownChildHandler = UnknownChildHandler { _, _, _, _, _ -> emptyList() }
}
}
}I also tried using a wrapper but couldn't solve the issue with the string type as I can't use it as a subclass of a specific wrapper type.
The error I get when trying to parse this country field (that we don't handle ATM so just returning null or an empty class like the Unknown one would be fine)
The unknownChildHandler seems to not be used as a fallback either.
I tried removing the default serializer without success.
error (exception=nl.adaptivity.xmlutil.serialization.XmlParsingException: Invalid XML value at position: 137:23: No XmlSerializable found to handle unrecognized value tag Country in polymorphic context)
nl.adaptivity.xmlutil.serialization.XmlParsingException: Invalid XML value at position: 137:23: No XmlSerializable found to handle unrecognized value tag Country in polymorphic context
at nl.adaptivity.xmlutil.serialization.XmlDecoderBase.deserializeSafe(XMLDecoder.kt:2229)
at nl.adaptivity.xmlutil.serialization.XmlDecoderBase$AnonymousListDecoder.decodeSerializableElement(XMLDecoder.kt:1701)
at kotlinx.serialization.encoding.CompositeDecoder$DefaultImpls.decodeSerializableElement$default(Decoding.kt:538)
at kotlinx.serialization.internal.CollectionLikeSerializer.readElement(CollectionSerializers.kt:80)
at kotlinx.serialization.internal.AbstractCollectionSerializer.readElement$default(CollectionSerializers.kt:51)
at kotlinx.serialization.internal.AbstractCollectionSerializer.merge(CollectionSerializers.kt:36)
at nl.adaptivity.xmlutil.serialization.XmlDecoderBase$TagDecoderBase.decodeSerializableElement(XMLDecoder.kt:900)
at com.dailymotion.adsharedsdk.feature.vastparser.data.dto.ExtensionDto$$serializer.deserialize(VastDto.kt:168)
at com.dailymotion.adsharedsdk.feature.vastparser.data.dto.ExtensionDto$$serializer.deserialize(VastDto.kt:168)
at nl.adaptivity.xmlutil.serialization.XmlDecoderBase.deserializeSafe(XMLDecoder.kt:111)
at nl.adaptivity.xmlutil.serialization.XmlDecoderBase$AnonymousListDecoder.decodeSerializableElement(XMLDecoder.kt:1701)
at kotlinx.serialization.encoding.CompositeDecoder$DefaultImpls.decodeSerializableElement$default(Decoding.kt:538)
at kotlinx.serialization.internal.CollectionLikeSerializer.readElement(CollectionSerializers.kt:80)
at kotlinx.serialization.internal.AbstractCollectionSerializer.readElement$default(CollectionSerializers.kt:51)
at kotlinx.serialization.internal.AbstractCollectionSerializer.merge(CollectionSerializers.kt:36)
at nl.adaptivity.xmlutil.serialization.XmlDecoderBase$TagDecoderBase.decodeNullableSerializableElement(XMLDecoder.kt:976)
Thanks again for your help !