How to define JSON Schema for Map<String, Integer>?

Question

I have a json :

{
"itemTypes": {"food":22,"electrical":2},
"itemCounts":{"NA":211}
}

Here the itemTypes and itemCounts will be common but not the values inside them (food, NA, electrical) which will be keep changing but the will be in the format : Map<String, Integer>

How do I define Json Schema for such generic structure ?

I tried :

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

    }

Answer 1

You can:

{
  "type": "object",
  "properties": {
    "itemType": {"$ref": "#/definitions/mapInt"},
    "itemCount": {"$ref": "#/definitions/mapInt"}
  },
  "definitions": {
    "mapInt": {
      "type": "object",
      "additionalProperties": {"type": "integer"}
    }
  }
}

Answer 2

The question is kind of badly described, let me see if I can rephrase it and also answer it.

Question: How to Represent a map in json schema like so Map<String, Something>

Answer:

It looks like you can use Additional Properties to express it https://json-schema.org/understanding-json-schema/reference/object.html#additional-properties

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

For example let's say you want a Map<string, string>

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

Or something more complex like a Map<string, SomeStruct>

{
  "type": "object",
  "additionalProperties": { 
    "type": "object",
    "properties": {
      "name": "stack overflow"
    }
  }
}