@JsonTypeInfo does not work if the Type Id is an Integer value

[marvin-we]

Hello together,

I am using the latest version of jackson (2.9.0) and I am trying to parse the following json:

[0,{"beneficiaries":[{"account":"esteemapp","weight":500}]}]

The first part of the array (0) is the id of the type of the second part of the array. To solve this I came up with the following configuration for the parent class:

@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.WRAPPER_ARRAY)
@JsonSubTypes({ @Type(value = CommentPayoutBeneficiaries.class, name = "0") })
public abstract class CommentOptionsExtension {

Using the snippet above causes the following Exception:

Caused by: com.fasterxml.jackson.databind.exc.MismatchedInputException: Unexpected token (VALUE_NUMBER_INT), expected VALUE_STRING: need JSON String that contains type id (for subtype of eu.bittrade.libs.steemj.base.models.CommentOptionsExtension)
at [Source: UNKNOWN; line: -1, column: -1] (through reference chain: java.util.ArrayList[0]->eu.bittrade.libs.steemj.base.models.SignedBlockWithInfo["transactions"]->java.util.ArrayList[9]->eu.bittrade.libs.steemj.base.models.Transaction["operations"]->java.util.ArrayList[1]->eu.bittrade.libs.steemj.base.models.operations.CommentOptionsOperation["extensions"]->java.util.ArrayList[0])
at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:59)
at com.fasterxml.jackson.databind.DeserializationContext.wrongTokenException(DeserializationContext.java:1485)
at com.fasterxml.jackson.databind.DeserializationContext.reportWrongTokenException(DeserializationContext.java:1260)
at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer._locateTypeId(AsArrayTypeDeserializer.java:151)
at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer._deserialize(AsArrayTypeDeserializer.java:96)
at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer.deserializeTypedFromObject(AsArrayTypeDeserializer.java:61)
at com.fasterxml.jackson.databind.deser.AbstractDeserializer.deserializeWithType(AbstractDeserializer.java:254)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:287)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:244)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:27)
at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:127)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:287)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151)
at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer._deserialize(AsArrayTypeDeserializer.java:116)
at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer.deserializeTypedFromObject(AsArrayTypeDeserializer.java:61)
at com.fasterxml.jackson.databind.deser.AbstractDeserializer.deserializeWithType(AbstractDeserializer.java:254)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:287)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:244)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:27)
at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:127)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:287)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:285)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:244)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:27)
at com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:136)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:287)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:285)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:244)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:27)
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:3733)
... 28 more

It would be great if it would be possible to also use Integer values as an Id.

Thank you and best regards!

[volkert-fastned]

Just ran into this same limitation, but with JsonTypeInfo.As.PROPERTY. Would be indeed be nice if this could be made more flexible.

[cowtowncoder]

@volkert-fastned Thanks for reminder -- I had somehow missed this one; turned out simple to improve handling as suggested.

[volkert-fastned]

Much appreciated! Thank you. Any ETA on the release of 2.14.2?

[cowtowncoder]

@volkert-fastned No idea at this point. There are few fixes, and release process takes multiple hours. So unlikely to happen before 2023.

[volkert-fastned]

I see that version 2.14.2 was released yesterday, and includes this improvement in the release notes.

Thank you! 🙏

[cowtowncoder]

You are welcome @volkert-fastned !