[BUG] [Spring] Generated @JsonSubTypes.Type value is incorrect for a model name with underscores

[ErikGrimes]

Description

Given a model with an underscore in the name, the generated

@JsonSubTypes.Type.value 

does not match the generated model class file name.

openapi-generator version

3.3.4

OpenAPI declaration file content or url

openapi: 3.0.0
info:
  title: Sample API
  description: API description in Markdown.
  version: 1.0.0
paths:
  /animals:
    get:
      summary: Returns all animals.
      description: Optional extended description in Markdown.
      responses:
        200:
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Animal'
components:
  schemas:
    Dog_Animal:
      allOf:
        - $ref: '#/components/schemas/Animal'
        - type: object
          properties:
            breed:
              type: string
    Cat_Animal:
      allOf:
        - $ref: '#/components/schemas/Animal'
        - type: object
          properties:
            breed:
              type: string
    Animal:
      type: object
      discriminator:
        propertyName: className
      required:
        - className
      properties:
        className:
          type: string
        color:
          type: string
          default: red
               

(for YAML code) or

Command line used for generation

openapi-generator generate -g spring

Steps to reproduce

Invoke the command line above with the provided API definition.

Suggest a fix

Transform the name when adding the MappedModel to the discriminator in DefaultCodegen.createDiscriminator using DefaultCodegent.toModelName().

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