How to disable @NonNull/@Nullable annotations in Kotlin generated Java code

Question

I need to disable @NonNull/@Nullable annotations in Kotlin generated Java code because some annotation adapters (code generators) cant handle properly some annotated fields

Do you know how it could be done? Some Kotlin annotation or compilator directive

Problem: kotlin class:

open class TestModel(
    var test: ByteArray = ByteArray(0)

)

generated java:

public class TestModel {
@org.jetbrains.annotations.NotNull()
private byte[] test;

@org.jetbrains.annotations.NotNull()
public final byte[] getTest() {
    return null;
}

public final void setTest(@org.jetbrains.annotations.NotNull()
byte[] p0) {
}

public TestModel(@org.jetbrains.annotations.NotNull()
byte[] test) {
    super();
}

public TestModel() {
    super();
}
}

I want to remove : @org.jetbrains.annotations.NotNull() annotation

You can't. This is one of the main reasons Kotlin exists: to provide null-safety and have that be interoperable with Java. If you can't have those annotations, don't use Kotlin. — TheWanderer
– TheWanderer, Commented Sep 7, 2018 at 11:41
Can't you just do: open class TestModel( var test: ByteArray? = ByteArray(0) ) — Krzysztof Kubicki
– Krzysztof Kubicki, Commented Sep 7, 2018 at 12:12
then I will have @Nullable annotation. I do not want any of them — Filipkowicz
– Filipkowicz, Commented Sep 7, 2018 at 12:27

Zoe - Save the data dump · Accepted Answer · 2018-09-07 13:36:18Z

1

You can't. The generated Java code tool shows what the Java code for a class looks like. As a result, it will include @Nullable and @NotNull; they're a core part of the language. They're there to handle null safety.

val x: String is the same as @NotNull public String x (needs initialization and semi-colons to be valid, but you get the idea). You can't remove them automatically from the compiled code, unless you write your own compiler (but that would be a real pain).

If you have problems because of the annotations, just use Java instead. The annotations don't get added there, and you won't have any problems. You'd need to mix the languages, but it's designed for it, so you should be fine.

edited Sep 7, 2018 at 13:36

answered Sep 7, 2018 at 12:47

Zoe - Save the data dump

28.4k22 gold badges130 silver badges163 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Filipkowicz Over a year ago

I'm doing it now, but it's only Java code in my codebase and it's kind of workaround, so I simply don't like it. But thanks!, good to know that it just how it works. The real problem is with Annotation processor that returns strange type for ByteArray. MirrorType for this field is (@org.jetbrains.annotations.NotNull :: byte)[] instead of simply byte[]

Collectives™ on Stack Overflow

How to disable @NonNull/@Nullable annotations in Kotlin generated Java code

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related