Apply explicit type for additionalProperties

[aalmiray]

Hi, I'm looking for an option that would let me add an explicit "type": "object" to the "additionalProperties" element. Reason being that publication of JSON schemas to schemastore requires schemas to be compliant with strict mode SchemaStore/schemastore#2793 (comment)

Basically turn

{
  "additionalProperties": {
    "type": "string"
  }
}

into

{
  "type": "object",
  "additionalProperties": {
    "type": "string"
  }
}

[CarstenWickner]

Hi @aalmiray,

What Schema Draft version are you using?
The referenced example is this:

        "headers" : {
          "allOf" : [ {
            "$ref" : "#/definitions/StringProperties"
          }, {
            "additionalProperties" : {
              "type" : "string"
            }
          } ]
        }

However, when you use a newer Schema Draft version (e.g., Draft 2019-09), that supports $ref and other keywords side-by-side, the generator should actually clean this up at the end of the process (unless you disabled the Option.ALLOF_CLEANUP_AT_THE_END) to this:

        "headers" : {
          "$ref" : "#/definitions/StringProperties"
          "additionalProperties" : {
            "type" : "string"
          }
        }

[aalmiray]

I can confirm that adding the type annotation to every single place where additionalProperties has a struct value makes schemastore happy, that is

      "type": ["object", "null"],
      "additionalProperties" : {
        "type" : "string"
      }

[CarstenWickner]

I've just pushed a 4.30.0-SNAPSHOT version to Maven (including the new Option), in case you want to try that one out as well.
Not sure when I will get to the release.

Do you have a particular urgency/time pressure here, or is it acceptable not to release this yet?

[aalmiray]

Thanks! It's not urgent at the moment as JReleaser's schema is independently hosted somewhere else, also available on demand via its CLI. Having it at schemastore is the cherry in top.

[CarstenWickner]

Release v4.30.0 has been published. 🚀

The new Option.STRICT_TYPE_INFO can be used to achieve the desired output here.