[BUG] [JAVA] [openapi-yaml] [spring] wrong generated example text

[kingofdisasterr]

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

direct usage of allOf destroyes the example of a property with type object without further properties.

expected output (with v7.4.0)

yaml

            example:
              someMeaningfulNumber: 25009779801

java

String exampleString = "{ \"data\" : { \"someMeaningfulNumber\" : 25009779801 }, \"someProperty\" : \"someProperty\" }";

failing output (>7.4.0)

yaml

      example:
        data: "{\"someMeaningfulNumber\":25009779801}"

java

String exampleString = "{ \"data\" : \"{\\"someMeaningfulNumber\\":25009779801}\", \"someProperty\" : \"someProperty\" }";

the generated yaml can't be used for further generation. the generated java code doesn't compile.

openapi-generator version

7.4.0 -> OK
7.5.0 -> fail
7.6.0 -> fail
7.7.0 -> fail

OpenAPI declaration file content or url

https://github.com/kingofdisasterr/openapi-generator-example/blob/main/src/main/resources/yaml/someinterface.yaml

full project:
https://github.com/kingofdisasterr/openapi-generator-example

Generation Details

mvn clean verifyof https://github.com/kingofdisasterr/openapi-generator-example/blob/main/pom.xml