[BUG][Java Spring OAS3] Openapi 2 imports in oas3 mode in the POJOs

Created by: whydoievenneedthis

Description

Every POJO that is generated contains the following two imports in it:

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;

openapi-generator version

5.3.1

OpenAPI declaration file content or url

openapi: 3.0.3
info:
  title: Api Documentation
  description: Api Documentation
  termsOfService: urn:tos
  contact: {}
  license:
    name: Apache 2.0
    url: http://www.apache.org/licenses/LICENSE-2.0
  version: '1.0'
paths:
  /thingy:
    get:
      operationId: get
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ResponseList'
components:
  schemas:
    ResponseList:
      type: array
      items:
        $ref: '#/components/schemas/ResponseEntry'
    ResponseEntry:
      type: object
      properties:
        id:
          type: string
          format: uuid
        name:
          type: string

Generation Details

Generator name: spring Config options: oas3 = true

Generated java code for ResponseEntry class

import java.net.URI;
import java.util.Objects;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonCreator;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import java.util.UUID;
import java.time.OffsetDateTime;
import javax.validation.Valid;
import javax.validation.constraints.*;
import io.swagger.v3.oas.annotations.media.Schema;
...

Expected java code for ResponseEntry class

import java.net.URI;
import java.util.Objects;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonCreator;
import java.util.UUID;
import java.time.OffsetDateTime;
import javax.validation.Valid;
import javax.validation.constraints.*;
import io.swagger.v3.oas.annotations.media.Schema;
...

Additional info

The source of these two imports are the model.mustache file, particularly these lines:

{{#imports}}import {{import}};
{{/imports}}

Unfortunately, these are also pulling in other imports, eg.

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonCreator;
import java.time.LocalDate;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

As a result, it is not trivial to try and circumvent this particular bug by tweaking the mustache files.