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

问题

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

回答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.

来源：https://stackoverflow.com/questions/52221783/how-to-disable-nonnull-nullable-annotations-in-kotlin-generated-java-code