[BUG] Description

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?
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Description

The problem is produced when trying to generate java source code with a string parameter type that includes an allOf -pattern structure.

In such case, a new type is created, which seems unusable.

In the example, the erroneous generated class is: Ipv6Addr.

The expected behevior was the attribute to be a String, as the ipv4Addr attribute

openapi-generator version

The openapi generator used is version 7.7

OpenAPI declaration file content or url

The open api yaml comes from 5g specifications.
A reduced yaml has been created to minimally reproduce the issue.

yaml content

Generation Details

the config.json file used for the generation is the following:

{
  "title": "5G Receiver API",
  "apiPackage": "com.nchf.rel16_15_0.openapi.api",
  "modelPackage": "com.nchf.rel16_15_0.openapi.model",
  "containerDefaultToNull": true,
  "openApiNullable": false,
  "generateBuilders": true,
  "generateConstructorWithAllArgs": true
}

openapi-generator-cli.jar is the v7.7 version openapi generation binary

The command line invocation sentence is the following:

java -jar ./openapi-generator-cli.jar generate \
            -i ./TS32291_Nchf_ConvergedCharging.lite.yaml \
            -g jaxrs-jersey \
            -o generated/. \
            -c ./config.json \
            --additional-properties hideGenerationTimestamp=false,browserClient=false \
            --verbose

Steps to reproduce

After having generated the java sources with the above instructions, we can see the class with the issue at file:

generated/src/gen/java/com/nchf/rel16_15_0/openapi/model/Ipv6Addr.java

Which is a class that has no attributes.

we can see that at the class at:

generated/src/gen/java/com/nchf/rel16_15_0/openapi/model/ChargingDataRequest.java

We have two attributes:

  public static final String JSON_PROPERTY_IPV4_ADDR = "ipv4Addr";
  @JsonProperty(JSON_PROPERTY_IPV4_ADDR)
  private String ipv4Addr;

That was a String, as expected

and the wrong one:

  public static final String JSON_PROPERTY_IPV6_ADDR = "ipv6Addr";
  @JsonProperty(JSON_PROPERTY_IPV6_ADDR)
  private Ipv6Addr ipv6Addr;

Which is of type: Ipv6Addr, the unusable one.

It was expected to be a String as ipv4Addr attribute

Related issues/PRs

Suggest a fix

The issue is probably produced by the fact that Ipv6Addr type has two patterns

Run the provided openapi-generator-cli command with the linked reduced YAML and config.json, then inspect generated/src/gen/java/com/nchf/rel16_15_0/openapi/model/Ipv6Addr.java and ChargingDataRequest.java. Compare the ipv6Addr output with ipv4Addr; done means the allOf-pattern string parameter is generated as String rather than an empty Ipv6Addr type.