Closed
Description
Describe the bug
I have the following classes:
data class RequestDto(
val assetIds: List<AssetId>
)
@JvmInline
value class AssetId(
val id: Int
)and I want to deserialize those requests like follows
val objectMapper = ObjectMapper().registerKotlinModule()
val request = objectMapper.readValue("""{"assetIds": [1, 2, 3]}""", RequestDto::class.java)But this fails and causes the following exception:
Exception in thread "main" com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.deviceinsight.ms.maintenancemanager.main.model.AssetId` (no Creators, like default constructor, exist): no int/Int-argument constructor/factory method to deserialize from Number value (1)
at [Source: (String)"{"assetIds": [1, 2, 3]}"; line: 1, column: 15] (through reference chain: RequestDto["assetIds"]->java.util.ArrayList[0])
at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:67)
at com.fasterxml.jackson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1904)
at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:400)
at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1349)
at com.fasterxml.jackson.databind.deser.ValueInstantiator.createFromInt(ValueInstantiator.java:324)
at com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.createFromInt(StdValueInstantiator.java:376)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromNumber(BeanDeserializerBase.java:1442)
at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:198)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:186)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer._deserializeFromArray(CollectionDeserializer.java:355)
...
To Reproduce
Just paste the snippets from above in a Kotlin file, wrap the last statement in a fun main() and add the libraries with below versions on the classpath.
Expected behavior
I would've expected this piece of code to work and parse the JSON to:
val request = RequestDto(assetIds = listOf(AssetId(1), AssetId(2), AssetId(3)))Versions
Kotlin: 1.6.10
Jackson-module-kotlin: 2.13.1
Jackson-databind: 2.13.1
Additional context
Serializing the RequestDto correctly leads to the following JSON:
{"assetIds":[1,2,3]}