Support for Jackson 3

[pbartoszek]

Are there any plans to support Jackson 3?

[kz282]

Please see #165

[christophejan]

Hello,

I was looking for a Jackson 3 compatible version and found that Jackson provides its own support of JsonPatch and JsonMergePatch since Jackson 2.12.2.

See :

• Support for JsonPatch and JsonMergePatch defined in JSON-P 1.1 #13
• jackson-datatypes-misc
• jackson-datatypes-misc>jakarta-jsonp

Even diff seems supported through Json#createDiff and Json#createMergeDiff.

I think I will try to switch to this Jackson module for JsonPatch and JsonMergePatch.

[anandjaisy]

Is this getting merge ?? with spring 7 and spring boot 4 keep facing the issue as

Caused by: tools.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of com.fasterxml.jackson.databind.JsonNode (no Creators, like default constructor, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information

[zapek]

I think I will try to switch to this Jackson module for JsonPatch and JsonMergePatch.

Thanks for the suggestion, it actually works! Here's what I did with Spring Boot 4 (don't forget to use Jackson 3 only, not Jackson 2):

Add dependencies:

implementation 'tools.jackson.datatype:jackson-datatype-jakarta-jsonp'
runtimeOnly 'org.leadpony.joy:joy-classic:2.1.0' // JSON-P implementation

To get a patch:

JsonValue target = objectMapper.convertValue(to, JsonValue.class);
JsonValue source = objectMapper.convertValue(from, JsonValue.class);
JsonPatch patch = Json.createDiff(source.asJsonObject(), target.asJsonObject());

To apply the patch:

JsonValue source = objectMapper.convertValue(from, JsonValue.class);
JsonObject patched = jsonPatch.apply(source.asJsonObject());

No need for java-json-tools.

[stephenmontgomery]

@zapek just to be clear - ur solution is not a pure jackson solution (which would be ideal as I'm on Spring Boot) - you still need 2 new dependencies (jackson-datatype-jakarta-jsonp - jackson bridge onto JSONP provider and the JSONP provider ie joy-classic/parsson etc) so really swapping a library for 2 new ones. 3 if u include jakarta.json-api.

I did use ur instructions as a guide and got a Jackson 2 equivalent working but really it's in preparation for upgrading to SB4/Jackson 3.

Maybe https://flipkart-incubator.github.io/zjsonpatch/ is a best drop in replacement for java-json-tools?

[edmundackah]

@zapek @kz282 @stephenmontgomery @pbartoszek @christophejan

I’ve created a library that follows this API but brings in support for Jackson 3. It’s designed as a drop-in replacement for anyone needing to upgrade. I'm currently running it in production for a high-volume payment gateway, so performance and reliability are baked in. Check out the docs here: https://guisseppe.gitlab.io/json-utils/getting-started