Support javaType and existingJavaType extensions in java-generator

[matteriben]

Is your enhancement related to a problem? Please describe

I'd like to generate Java classes from CRDs using the java-generator. However, I don't see any way currently reuse an existing class (existingJavaType), or define a shared/common class (javaType) to be used in the generated classes.

Describe the solution you'd like

I'd like something like the javaType and existingJavaType extensions in jsonschema2pojo.

Describe alternatives you've considered

No response

Additional context

No response

[matteriben]

I have a branch that implements the requested enhancement. However, I was unable to push it to this repo. So, I forked the repo and pushed it there.

https://github.com/matteriben/kubernetes-client/tree/iss_5843

[andreaTP]

Please, open a PR to this repo with your changes, it looks promising!
I'll have a closer look early next week 👍

[matteriben]

There is a PR here, thanks!
#5844

[manusa]

Closed by #5844