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Jackson serialization issue with sub/super types
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| package nl.anwb.geocontext | |
| import com.fasterxml.jackson.annotation.JsonTypeInfo | |
| import com.fasterxml.jackson.databind.DatabindContext | |
| import com.fasterxml.jackson.databind.DeserializationFeature | |
| import com.fasterxml.jackson.databind.JavaType | |
| import com.fasterxml.jackson.databind.MapperFeature | |
| import com.fasterxml.jackson.databind.annotation.JsonTypeIdResolver | |
| import com.fasterxml.jackson.databind.jsontype.impl.TypeIdResolverBase | |
| import com.fasterxml.jackson.dataformat.xml.JacksonXmlModule | |
| import com.fasterxml.jackson.dataformat.xml.XmlMapper | |
| import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty | |
| import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlRootElement | |
| import com.fasterxml.jackson.module.kotlin.registerKotlinModule | |
| fun main() { | |
| val mapper = XmlMapper(JacksonXmlModule().apply { | |
| setDefaultUseWrapper(false) | |
| }).registerKotlinModule() | |
| .configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true) | |
| .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false) | |
| val docs = Documents().apply { | |
| document = DocumentSet().apply { | |
| this.documents.add(NormalDocument("name")) | |
| this.documents.add(SpecialDocument("author")) | |
| } | |
| } | |
| val xml = mapper.writeValueAsString(docs) | |
| println(xml) | |
| val document = mapper.readValue(xml, Documents::class.java) | |
| println(document) | |
| } | |
| @JacksonXmlRootElement(localName = "Documents") | |
| class Documents { | |
| @JacksonXmlProperty | |
| var document: Document? = null | |
| override fun toString(): String { | |
| return "Documents(document=$document)" | |
| } | |
| } | |
| @JsonTypeInfo(use = JsonTypeInfo.Id.CUSTOM, property = "type") | |
| @JsonTypeIdResolver(value = MyTypeResolver2::class) | |
| open class Document { | |
| @field:JacksonXmlProperty(isAttribute = true, localName = "type") | |
| var type: String? = null | |
| } | |
| class DocumentSet : Document() { | |
| @JacksonXmlProperty(localName = "Document") | |
| var documents: ArrayList<Document> = ArrayList() | |
| } | |
| data class NormalDocument( | |
| @JacksonXmlProperty | |
| val name: String? = null, | |
| ) : Document() | |
| data class SpecialDocument( | |
| @JacksonXmlProperty | |
| val author: String? = null, | |
| ) : Document() | |
| class MyTypeResolver2 : TypeIdResolverBase() { | |
| private var superType: JavaType? = null | |
| override fun init(baseType: JavaType?) { | |
| superType = baseType | |
| } | |
| override fun idFromValue(value: Any?): String { | |
| return when (value) { | |
| is DocumentSet -> "set" | |
| is SpecialDocument -> "special" | |
| is NormalDocument -> "normal" | |
| else -> "" | |
| } | |
| } | |
| override fun idFromValueAndType(value: Any?, suggestedType: Class<*>?): String { | |
| // Not used | |
| return "" | |
| } | |
| override fun getMechanism(): JsonTypeInfo.Id { | |
| return JsonTypeInfo.Id.CUSTOM | |
| } | |
| override fun typeFromId(context: DatabindContext, id: String): JavaType { | |
| println("ID = $id") | |
| return when (id) { | |
| "normal" -> context.constructSpecializedType(superType, NormalDocument::class.java) | |
| "special" -> context.constructSpecializedType(superType, SpecialDocument::class.java) | |
| "set" -> context.constructSpecializedType(superType, DocumentSet::class.java) | |
| else -> context.constructSpecializedType(superType, Document::class.java) | |
| } | |
| } | |
| } |
Does work with the newest 2.13.3 release.
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Fails with:
Exception in thread "main" com.fasterxml.jackson.databind.exc.InvalidTypeIdException: Could not resolve subtype of [simple type, class nl.anwb.geocontext.Document]: missing type id property 'type' (for POJO property 'Document')
at [Source: (StringReader); line: 4, column: 23] (through reference chain: nl.anwb.geocontext.Documents["Document"]->nl.anwb.geocontext.DocumentSet["Document"]->java.util.ArrayList[0])
at com.fasterxml.jackson.databind.exc.InvalidTypeIdException.from(InvalidTypeIdException.java:43)
at com.fasterxml.jackson.databind.DeserializationContext.missingTypeIdException(DeserializationContext.java:2083)
at com.fasterxml.jackson.databind.DeserializationContext.handleMissingTypeId(DeserializationContext.java:1596)
at com.fasterxml.jackson.databind.jsontype.impl.TypeDeserializerBase._handleMissingTypeId(TypeDeserializerBase.java:307)
at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer._deserializeTypedUsingDefaultImpl(AsPropertyTypeDeserializer.java:185)
at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer.deserializeTypedFromObject(AsPropertyTypeDeserializer.java:96)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeWithType(BeanDeserializerBase.java:1292)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer._deserializeFromArray(CollectionDeserializer.java:357)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:244)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:28)
at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:313)
at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:214)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:186)
at com.fasterxml.jackson.dataformat.xml.deser.WrapperHandlingDeserializer.deserialize(WrapperHandlingDeserializer.java:122)
at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer._deserializeTypedForId(AsPropertyTypeDeserializer.java:144)
at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer.deserializeTypedFromObject(AsPropertyTypeDeserializer.java:110)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeWithType(BeanDeserializerBase.java:1292)
at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:138)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:313)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:176)
at com.fasterxml.jackson.dataformat.xml.deser.XmlDeserializationContext.readRootValue(XmlDeserializationContext.java:91)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4675)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3630)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3598)
at nl.anwb.geocontext.XmlListTestKt.main(XmlListTest.kt:24)