[BUG][Java] Error when using property of type boolean with enum

[jvs64893]

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

Generating from a model with a boolean property wich contains enums results in code that contains compile errors. I know that this is a rather stupid OpenAPI description, but it is nonetheless valid (and I sadly can't change the input spec I have to use).

openapi-generator version

5.0.1

OpenAPI declaration file content or url

"test": {
  "type": "boolean",
  "description": "Test",
  "example": true,
  "enum": [
    true,
    false
  ]
}

This results in:

  public enum Test{
    TRUE("true"),
    
    FALSE("false");
    ...
  }

Which fails to compile:

error: incompatible types: String cannot be converted to Boolean
    TRUE("true"),

Generation Details

Java with any library results in this issue.

Steps to reproduce

Have any model contain a boolean property with enum values.

Related issues/PRs

None

Suggest a fix

The expected outcome should be:

  public enum Test{
    TRUE(true),
    
    FALSE(false);
    ...
  }