[BUG] [Java][jersey2] null type is not supported in oneOf/anyOf

[wing328]

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• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
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Description

Details of the issue: #6237 (comment)

openapi-generator version

Last master

OpenAPI declaration file content or url

https://github.com/CiscoM31/intersight-openapi/blob/master/intersight-openapi-v3.yaml

Command line used for generation

Steps to reproduce

Related issues/PRs

Suggest a fix

[briceburg]

@wing328 I am getting the following error in plugin 4.3.1, need to revert to 4.3.0 to fix.

.../generated/openapi-client/src/main/java/org/openapitools/client/model/OperationResult.java:29: error: cannot find symbol
import org.openapitools.client.model.oas_any_type_not_mapped;
                                    ^
  symbol:   class oas_any_type_not_mapped
  location: package org.openapitools.client.model

Config:

openApiGenerate {
    generatorName = "java" // https://github.com/OpenAPITools/openapi-generator/blob/master/docs/generators/java.md
    inputSpec = "$projectDir/openapi.json"
    configOptions = [
            "dateLibrary": "java8",
            "library": "native",
            "java8": "true",
    ]
}