On Fri, May 31, 2019 at 3:29 PM 遗迹 <[email protected]> wrote:
> Hello,
>
> I create a deserializer for match corret subclass of abstract class.
>
> I register the deserializer for `InputMessageContent`.
> But when I call `jp.getCodec().readTree<JsonNode>(jp)` in
> `deserializer(JsonParser jp, DeserializationContext ctxt)`.
> It return the parent element which contains `InputMessageContent`.
>
> But If I call jp.nextToken() before, it will works.
>
> It's says:
>
> input:
> {"foo": {"a": "value", "b": "something"}}
>
> type define:
> class Foo{
> InputMessageContent foo;
> }
>
> @JsonDeserialize(using = InputMessageContentDeserializer.class)
> class InputMessageContent{
> String a;
> String b;
> }
>
> Output:
> jp.getCodes().readTree(jp).toString()=="{"foo": {"a": "value", "b": "
> something"}}"
> //I wish it should be "{"a": "value", "b": "something"}" <--- If I call
> jp.nextToken() before.
>
>
>
> In fact, I'm use Kotlin for this.
> The source code is long:
> https://paste.ubuntu.com/p/X2qSNGSQGp/
>
>
I agree: it should not be necessary to call `nextToken()` at that point.
But instead of
`jp.getCodec().readTree<JsonNode>(jp)`
I would just call
`jp.readValueAsTree()`
Not sure if that makes a difference. Also make sure to use a new version of
`jackson-databind` and `jackson-core`.
I hope this helps,
-+ Tatu +-
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