[BUG][JAVA] Object not enforcing minProperties

[oscar8880]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

Actual behaviour
When defining an object with minProperties like so:

RequestBody:
  type: object
  minProperties: 1
  properties:
    foo:
      type: string
      example: "abc"
    bar:
      type: integer
      example: 123

the minimum properties field is seemingly not enforced. In the above example an empty object will be accepted and generate the class

class RequestBody {
    foo: null
    bar: null
}

Expected behaviour
My expectation would be that deserialising an empty object into a RequestBody class should throw an error due to fewer than 1 minimum property being present.

openapi-generator version

7.10.0, not a regression

OpenAPI declaration file content or url

openapi: 3.0.0
info:
  title: Test
  version: v1
paths:
  /test:
    post:
      operationId: test
      requestBody:
        required: true
        description: Lorem ipsum
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RequestBody'
      responses:
        201:
          description: Lorem ipsum
          content:
            application/json:
              schema:
                type: object
                properties:
                  foo:
                    type: string

components:
  schemas:
    RequestBody:
      type: object
      minProperties: 1
      properties:
        foo:
          type: string
          example: "abc"
        bar:
          type: integer
          example: 123

Related issues/PRs

I wasn't able to find existing issues relating to this topic.