Allow kotlin pojos to not have defaulted constructor parameters

[NikolayMetchev]

Use case:

We are using mapstruct to map from jooq generated kotlin data classes to other classes but because jooq generator defaults all the constructor parameters to null Mapstruct doesn't know how to invoke the constructor as it is Java based.

I have described in detail the use case here: mapstruct/mapstruct#2378 (comment)

Possible solution you'd like to see:

Essentially I think it would be enough to be able to modify the following code and have the = null be configurable:

jOOQ/jOOQ-codegen/src/main/java/org/jooq/codegen/JavaGenerator.java

Line 2058 in 5e69809

arguments.add(columnMember + ": " + type + "? = null");

Possible workarounds:

As a workaround we are not using immutable Pojos in the code generator

Versions:

• jOOQ: 3.14.8
• Java: 17
• Database (include vendor): Postgres Aurora 13.4
• OS: Mac/Linux
• JDBC Driver (include name if inofficial driver): 42.3.3

[lukaseder]

Thank you very much for your feature request.

I don't think there's anything specific to immutable POJOs to be taken care of here, compared to the existing feature request here: #10212.

Closing this as a duplicate.

[NikolayMetchev]

#10212 seems to be a much more generic solution, which I don't know if it will address the mapstruct problem outlined in my request. I guess I will wait for it to get resolved and decide then.

[lukaseder]

OK, I'll keep this one here open, but I can't promise to look at it before the big nullability questions are addressed in #10212

[lukaseder]

In the meantime, I have been convinced to add a few nullability governing flags to the KotlinGenerator, so why not add more. There will be:

<kotlinDefaultedNullablePojoAttributes>false</kotlinDefaultedNullablePojoAttributes>
<kotlinDefaultedNullableRecordAttributes>false</kotlinDefaultedNullableRecordAttributes>