How to add a custom serializer/format for Java zoneddatetime with fabric8 maven plugin?

Question

I am using fabric8 maven plugin to autogenerate Java classes for a CRD from it's yaml file. One of the fields is:

updated_time:
  format: date-time
  type: string

It's getting converted to a java.time.zoneddatetime field:

@com.fasterxml.jackson.annotation.JsonFormat(timezone = "UTC", pattern = "yyyy-MM-dd'T'HH:mm:ssX")
private java.time.ZonedDateTime updated_time;

I want to change the pattern above to yyyy-MM-dd'T'HH:mm:ssXXX , a timestamp with offset, so it can parse timestamps like 2023-08-07T06:43:19+00:00. How can I achieve this? On java-generator-maven-plugin v6.2.0, open to upgrade.

Answer 1

Version 6.8.1 of the fabric8 java-generator has been released and includes the relevant fix for this issue.

Answer 2

This is not possible at the moment in the fabric8 java-generator. A date-time field should be RFC 3339 according to the OpenAPI spec.

Would you mind elaborating on the use-case/project that is emitting the incorrect date format?

Anyhow, the viable workaround would be to comment out format: date-time in the CRD before the generation, so that you can receive a String.

Note on the version: I do believe that you are using java-generator with version > 6.8 as native support for date-time has only been recently released.