Cannot deserialize `byte[]` from JSON `null` value

[reed53]

Hello,
I ran into a bug today that I don't see a workaround for.
If I have an object like so:

  @Setter
  @Getter
  public static class ObjectWithByteArray {
      private byte[] arr;
  }

and I try to deserialize "{\"arr\":null}", I get the following error:

com.fasterxml.jackson.core.JsonParseException: Current token (VALUE_NULL) not VALUE_STRING or VALUE_EMBEDDED_OBJECT, can not access as binary
 at [Source: (String)"{"arr":null}"; line: 1, column: 12]

I then tried to implement a custom reader for byte arrays to work around this issue, however it seems like the error occurred before the reader has access to the value.

[cowtowncoder]

Could you please include a full reproduction, without using @Setter / @Getter annotations, and specifically include call you use for jackson-jr. Code snippets do not necessarily allow us to reproduce exact issue and we end up wasting time figuring out exact details otherwise.

It is possible this could be recreated from description, I've just had some bad experiences where submitter has omitted crucial details on calls being made, or (in some case) interaction with frameworks like Lombok.

[reed53]

No worries! Here is a java program that when executed, reproduces the bug:

import com.fasterxml.jackson.jr.ob.JSON;
import java.io.IOException;

public class Test {

    public static void main(String[] args) throws IOException {
        var serialized = "{\"arr\":null}";
        var mapper = JSON.builder().build();

        var deserialized = mapper.beanFrom(ObjectWithByteArray.class, serialized);

        System.out.println(deserialized);
    }

    public static class ObjectWithByteArray {
        private byte[] arr;

        public byte[] getArr() {
            return arr;
        }

        public void setArr(byte[] arr) {
            this.arr = arr;
        }
    }
}

[cowtowncoder]

Excellent, thank you @reed53 ! Definitely looks like a bug.

[cowtowncoder]

Fixed for 2.15(.3) / 2.16(.0).

[reed53]

Do you know how long it may be until a release?

[cowtowncoder]

@reed53 Unfortunately hard to predict, BUT, I am hoping to get first 2.16 release candidate out within this or next week. And would make sense to release 2.15.3 at around same time. So I think it can go out within 2 weeks if and when I find time (release takes 2-4 hours for the whole Jackson set)