[BUG][java-vertx-web] Generated code does not compile for text/plain request bodies

Description

Generated code does not compile for text/plain request bodies.

There is a redeclaration like so:

RequestParameter body = requestParameters.body();
String body = body != null ? DatabindCodec.mapper().convertValue(body.get(), new TypeReference<String>(){}) : null;

openapi-generator version

7.2.0
Also checked on latest master via Docker

OpenAPI declaration file content or url

openapi: 3.0.3
info:
  title: Example
  version: 1.0.0
paths:
  /example:
    post:
      operationId: postExample
      requestBody:
        required: true
        content:
          text/plain:
            schema:
              type: string
      responses:
        200:
          description: Successful operation

Generation Details

openapi-generator generate \
  -i ./api.yaml \
  "-g" "java-vertx-web"

Steps to reproduce

Run the above command

Related issues/PRs

Suggest a fix

Not the cleanest, but bodyParams.mustache can be:

{{#isBodyParam}}
        RequestParameter rawBody = requestParameters.body();
        {{dataType}} {{paramName}};
        if ((routingContext.parsedHeaders().contentType().component() + "/" + routingContext.parsedHeaders().contentType().subComponent()).equals("text/plain")) {
                {{paramName}} = rawBody != null ? ({{dataType}}) (Object) rawBody.get().toString() : null;
        } else {
                {{paramName}} = rawBody != null ? DatabindCodec.mapper().convertValue(rawBody.get(), new TypeReference<{{{dataType}}}>(){}) : null;
        }
{{/isBodyParam}}

Start with the java-vertx-web generator's bodyParams.mustache template and reproduce the issue using the supplied OpenAPI YAML and generation command. Inspect the generated handler for the text/plain body and verify that the resulting Java source compiles without the body variable redeclaration.