[jaxrs-cxf-cdi] validations not working for the nested referneces in generated code

Description

I am generating code using swagger-codegen dependency version 2.3.1. The swagger file is having nested reference as shown below:

Pet:
   title: Pet object
   properties:
      id: 
         type: string
         example: 01234567-0123-0123-0123-01234567892453
      info:
         $ref: '#/definitions/info'

info:
    title: Type object.
    properties:
      owner:
        type: string
        example: John
        maxLength: 40

Generated code snipper for Pet model:

  @ApiModelProperty(value = "")
  @JsonProperty("info")
  public InfoDTO getInfo() {
    return info;
  }
  public void setInfo(InfoDTO info) {
    this.info = info;
  }

Generated code snippet for info model:

  @ApiModelProperty(example = "owner", value = "")
  @JsonProperty("owner")
  @Size(max=40)  public String getOwner() {
    return owner;
  }

Even though the generated code is having the @Size annotation, when invoking the API, the request parameter is not getting validated.

Am I missing anything here? Appreciate any help to validate the conditions mentioned in the references.

Swagger-codegen version

2.3.1

Start by reproducing the request validation behavior with the generated Pet and InfoDTO models in the JAX-RS-CXF-CDI setup, focusing on the nested info.owner constraint. Trace the generated validation path and confirm whether a request whose owner exceeds the shown maxLength is rejected; done means nested-reference constraints are enforced during API invocation.