[BUG] [JAVA-gen] Standard Java inheritance, not an abstract schema wrapper !!

[Chhida]

Description

I want to model a real OO inheritance structure in my Java DTOs,
but my schema is being interpreted as a polymorphic “wrapper” schema — not a normal DTO.

`public class SimulationDto extends AbstractOpenApiSchema {
....

static {
schemas.put("SimulationSatdDto", SimulationSatdDto.class);
schemas.put("SimulationMedDto", SimulationMedDto.class);
schemas.put("SimulationPcaDto", SimulationPcaDto.class);
}
........
}
`

openapi-generator version

7.16.0

OpenAPI declaration file content or url

Generation Details

Steps to reproduce

mvn openapi-generator:generate

Suggest a fix

Do not combine oneOf or discriminator unless you want polymorphic serialization.
Use allOf only.