Java OpenApi generator Does not support for unsigned integer data type [Uint32]

Description

Java OpenApi generator Does not support for unsigned integer data type

openapi-generator version

4.3.1

OpenAPI declaration file content or url

Uint32:
  type: integer
  minimum: 0
  maximum: 4294967295 #(2^32)-1

Command line used for generation

Used the maven plugin to generate the model class from yaml file .

org.openapitools openapi-generator-maven-plugin 4.3.1

Steps to reproduce

Run open API code gen for the below value.

ChargingId:
$ref: '#/Uint32'

Uint32:
  type: integer
  minimum: 0
  maximum: 4294967295 #(2^32)-1

Its generating the below model class,

@ApiModelProperty(value = "")
@JsonProperty("ChargingId")
@Min(0) @Max(2147483647) public Integer getChargingId()

This is wrong as Integer does not hold 4294967295 value.

Related issues/PRs

NA

Suggest a fix/enhancement

Currenntly this is generating with Integer data type. Which have validation only for Integer.

Currenlt looks it doesn't not support Uint32 model class generation

Start by reproducing the issue with the provided Uint32 schema through the openapi-generator Maven plugin and inspect the generated ChargingId model. Trace the Java generator's handling of integer bounds and validation annotations. Done means generated models represent the declared 0–4294967295 range without the incorrect Integer limit, with tests covering the case.