Realm-java: Realm does not support Kotlin ByteArray type (java byte[])

[filipkowicz]

Goal

use ByteArray ( kotlin's byte[] alias) with Realm

example:
open class TestModel( @RealmField(name = "test") var test: ByteArray? = ByteArray(0)): RealmObject()

Expected Results

compiles fine

Actual Results

error: Field "test" of type "(@org.jetbrains.annotations.Nullable :: byte)[]" is not supported.

Code Sample

kotlin version which does not compile:
open class TestModel(
        @RealmField(name = "test")
        var test: ByteArray? = ByteArray(0)): RealmObject()`

java version which compile fine:
public class TestModel extends RealmObject {
    @RealmField(name = "test")
    public byte[] test;
}

Version of Realm and tooling

Realm version(s): ?=5.5.0

Realm sync feature enabled: no

Android Studio version: 3.2

Which Android version and device: emulator 8.0

[Zhuinden]

Have you tried ByteArray instead of ByteArray??

[filipkowicz]

same thing:

open class TestModel(
        @RealmField(name = "test")
        var test: ByteArray = ByteArray(0)

): RealmObject()

gives java class:

@kotlin.Metadata(mv = {1, 1, 11}, bv = {1, 0, 2}, k = 1, d1 = {"\u0000\u0012\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\u0012\n\u0002\b\u0005\b\u0016\u0018\u00002\u00020\u0001B\u000f\u0012\b\b\u0002\u0010\u0002\u001a\u00020\u0003\u00a2\u0006\u0002\u0010\u0004R\u001e\u0010\u0002\u001a\u00020\u00038\u0006@\u0006X\u0087\u000e\u00a2\u0006\u000e\n\u0000\u001a\u0004\b\u0005\u0010\u0006\"\u0004\b\u0007\u0010\u0004\u00a8\u0006\b"}, d2 = {"Lch/sherpany/boardroom/model/encryption/TestModel;", "Lio/realm/RealmObject;", "test", "", "([B)V", "getTest", "()[B", "setTest", "app_debug"})
public class TestModel extends io.realm.RealmObject {
    @org.jetbrains.annotations.NotNull()
    @io.realm.annotations.RealmField(name = "test")
    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 think that annotation @org.jetbrains.annotations.NotNull() could be a problem

[filipkowicz]

I've done little research and:
Constants.JAVA_TO_REALM_TYPES has "byte[]" (string) as Type. Then it's used to check supported field types in RealmProxyClassGenerator.emitPersistedFieldAccessors where field.asType().toString()= fieldTypeCanonicalName should be byte[]but it is (@org.jetbrains.annotations.NotNull :: byte)[]

[cruxdyno]

I had the same error after updating some library versions. These two caused it:

• updating com.bluelinelabs:conductor & support from 2.1.4 to 2.1.5
• or updating com.jakewharton.timber:timber:4.5.1 to 4.7.1

I tried with realm 4.1.1 and 5.8.0, but it didn't help. conductor and timber were the problems for me. I assume this behavior is a bug in annotation processing from some other library or plugin, so your solution might be different than mine, but I suggest you check whether you updated any libraries.

[Grohden]

I've got this after adding Timber 4.7.1 to the project
This is the log:

Equipment.java:18: error: Field "workCenterCode" of type "(@org.jetbrains.annotations.Nullable :: java.lang.String)" is not supported.

[Grohden]

Maybe this is related?
https://github.com/JakeWharton/timber/issues/295

[Grohden]

Changing the nullable import from
import org.jetbrains.annotations.Nullable; to import android.support.annotation.Nullable;
Fixed the build for me. But i'm not sure what changes with this...

[edgar-zigis]

I've got this after adding Timber 4.7.1 to the project
This is the log:

Equipment.java:18: error: Field "workCenterCode" of type "(@org.jetbrains.annotations.Nullable :: java.lang.String)" is not supported.

Same here, issue appeared after updating Timber to 4.7.1

[zeroarst]

Having the same issue with Timber 4.7.1...anyone found the solution..?

[phamquan]

It seems to be the only solution now is to downgrade Timber to 4.5.0